Repair and Diagnosis (Single Page)
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Common Specs & Procedures
DTC Index
Electrical Component Locations
Fluids
Technical Bulletins
Tire Fitment
Wiring Diagrams- System Wiring Diagrams
- Using lemon2025'S Wiring Diagrams
- Air Conditioning
- Anti-Lock Brakes
- Anti-Theft
- Computer Data Lines
- Cruise Control
- Defoggers
- Engine Performance
- Exterior Lights
- Ground Distribution
- Headlights
- Horn
- Instrument Cluster
- Interior Lights
- Power Antenna
- Power Distribution
- Power Door Locks
- Power Mirrors
- Power Seats
- Power Top/Sunroof
- Power Windows
- Radio
- Starting/Charging
- Supplemental Restraints
- Transmission
- Warning Systems
- Wiper/Washer
- Using lemon2025'S System Wiring Diagrams
- System Wiring Diagrams
- Accessories & Equipment
- Anti-Theft Systems
- Identification
- Description & Operation
- Programming
- Trouble Shooting
- Removal & Installation
- Testing
- Notes
- Using DRB
- Test 1A - Testing System Function
- Test 1B - Testing System Function
- Test 2A - Repairing No Response
- Test 2B - Repairing No Response
- Test 2C - Repairing No Response
- Test 3A - Repairing Security Light Flashing Constantly
- Test 4A - Repairing Ignition Input Circuit
- Test 5A - Repairing Ignition Input Circuit
- Test 6A - Repairing Horn Circuit
- Test 6B - Repairing Horn Circuit
- Test 7A - Repairing Security Indicator Light Circuit
- Test 7B - Repairing Security Indicator Light Circuit
- Test 8A - Repairing Parking Light Circuit
- Test 8B - Repairing Headlight Circuit
- Test 8C - Repairing Battery Feed Input Circuit
- Test 8D - Repairing Battery Feed Input Circuit
- Test 9A - Repairing Door Jamb Sense Circuit
- Test 10A - Repairing Hood Ajar Sense Circuit
- Test 10B - Repairing Hood Ajar Circuit
- Test 11A - Liftgate Latch Sense Circuit
- Test 12A - Repairing Door Switch Lock Sense Circuit
- Test 13A - Repairing Door Switch Unlock Sense Circuit
- Test 14A - Repairing VTA Disarm Sense Left Door Circuit
- Test 15A - Repairing VTA Disarm Sense Right Door Circuit
- Test 15B - Repairing Door Key Cylinder Circuit
- Test 16A - Repairing Liftgate Key Cylinder Circuit
- Test 17A - Repairing No Response From Pcm
- Test 18A - Repairing Arm Sense Circuit From (RKE)
- Test 18B - Repairing Disarm Sense Circuit From (RKE)
- Test VER-1A - Verification Test
- Wiring Diagram
- Cruise Control Systems
- Identification
- Self-Diagnostics
- Notes
- Test SC-1A - Checking Cruise Control Inputs
- Test SC-1B - Checking Cruise Control Inputs
- Test SC-2A - Checking Cruise Control On/Off Switch
- Test SC-3A - Checking Cruise Control Set Switch (CHEROKEE)
- Test SC-3A - Checking Cruise Control Set Switch (Grand CHEROKEE)
- Test SC-3B - Checking Cruise Control Resume Switch
- Test SC-4A - Checking Cruise Control Brake Switch
- Test SC-5A - Checking Park/Neutral Switch Input
- Test SC-6A - Checking Cruise Control Operation
- Test TC-7A - No Vehicle Speed Sensor Signal
- Test TC-7B - No Vehicle Speed Sensor Signal
- Test TC-32A - Repairing Cruise Control Solenoid Circuits
- Test TC-32B - Cruise Control Vacuum Solenoid Control Circuit
- Test TC-32C - Cruise Control Vent Solenoid Control Circuit
- Test VER-4A - Cruise Control Verification
- Test VER-1A - Verification Test VER-1A
- Description & Operation
- Service Precautions
- Self-Diagnostic System
- Trouble Shooting
- Notes
- No Cruise Control When Set Button Is Pressed & Released
- Cruise Control Engages Without Actuating Cruise Set Button
- Cruise Control Engages When Engine Is Started
- Erratic Speed Or Engine Shuts Off
- Cruise Control Disengages On Rough Road
- Engine Does Not Return To Normal Idle
- No Resume When Resume Button Is Pressed
- Cruise Control Does Not Disengage With Brake Pedal Depressed
- Testing
- Removal & Installation
- Wiring Diagrams
- Gauges & Instrument Panels
- Heated Glass/Defoggers
- Infotainment
- Mirrors - Power
- Power Seats
- Steering Column Switches
- Warning Systems
- Window Motors & Regulators
- Wiper/Washer Systems
- Anti-Theft Systems
- Body & Frame
- Door Locks
- Anti-Theft System
- Identification
- Description & Operation
- Programming
- Trouble Shooting
- Removal & Installation
- Testing
- Notes
- Using DRB
- Test 1A - Testing System Function
- Test 1B - Testing System Function
- Test 2A - Repairing No Response
- Test 2B - Repairing No Response
- Test 2C - Repairing No Response
- Test 3A - Repairing Security Light Flashing Constantly
- Test 4A - Repairing Ignition Input Circuit
- Test 5A - Repairing Ignition Input Circuit
- Test 6A - Repairing Horn Circuit
- Test 6B - Repairing Horn Circuit
- Test 7A - Repairing Security Indicator Light Circuit
- Test 7B - Repairing Security Indicator Light Circuit
- Test 8A - Repairing Parking Light Circuit
- Test 8B - Repairing Headlight Circuit
- Test 8C - Repairing Battery Feed Input Circuit
- Test 8D - Repairing Battery Feed Input Circuit
- Test 9A - Repairing Door Jamb Sense Circuit
- Test 10A - Repairing Hood Ajar Sense Circuit
- Test 10B - Repairing Hood Ajar Circuit
- Test 11A - Liftgate Latch Sense Circuit
- Test 12A - Repairing Door Switch Lock Sense Circuit
- Test 13A - Repairing Door Switch Unlock Sense Circuit
- Test 14A - Repairing VTA Disarm Sense Left Door Circuit
- Test 15A - Repairing VTA Disarm Sense Right Door Circuit
- Test 15B - Repairing Door Key Cylinder Circuit
- Test 16A - Repairing Liftgate Key Cylinder Circuit
- Test 17A - Repairing No Response From Pcm
- Test 18A - Repairing Arm Sense Circuit From (RKE)
- Test 18B - Repairing Disarm Sense Circuit From (RKE)
- Test VER-1A - Verification Test
- Wiring Diagram
- Anti-Theft System
- Mirrors - Power
- Power Seats
- Sun Roof/T-Top/Convertible Top
- Power Windows
- Door Locks
- Brakes
- Anti-Lock Brakes
- Anti-Lock Brake System
- Model Identification
- Description
- Operation
- Bleeding Brake System
- Diagnosis & Testing
- Connector Identification
- Self-Diagnostic Tests
- Notes
- TEST 1A - CHECKING ABS SYSTEM FOR DIAGNOSTIC TROUBLE CODES (DTCs)
- Test 2A - Controller Failure
- Test 3A - Acceleration Switch Not Processable
- Test 5A - Left Front Inlet Valve
- Test 6A - Left Front Outlet Valve
- Test 7A - Left Front Sensor Circuit Failure
- Test 8A - Left Front Sensor
- Test 9A - Rear Inlet Valve
- Test 10A - Rear Outlet Valve
- Test 11A - Left Rear Sensor Circuit Failure
- Test 12A - Left Rear Sensor
- Test 13A - Main Relay/Power Circuit Failure
- Test 13B - Main Relay/Power Circuit Failure
- Test 15A - Pump Motor Circuit Not Working Properly
- Test 15B - Pump Motor Circuit Not Working Properly
- Test 15C - Pump Motor Circuit Not Working Properly
- Test 15D - Pump Motor Circuit Not Working Properly
- Test 15E - Pump Motor Circuit Not Working Properly
- Test 15F - Pump Motor Circuit Not Working Properly
- Test 16A - Right Front Inlet Valve
- Test 17A - Right Front Outlet Valve
- Test 18A - Right Front Sensor Circuit Failure
- Test 19A - Right Front Sensor
- Test 20A - Right Rear Sensor Circuit Failure
- Test 21A - Right Rear Sensor
- Test 22A - Abs Warning Light Illumination Problem
- Test 23A - Scan Tool No Response Message
- Test 24A - Repairing Cycling At End Of A Non-Abs Stop
- Test 25A - Wrong Abs Electronic Control Unit (Ecu)
- Test 26A - Abs Ecu Failure Verification Test
- Verification Test VER-1A - System Verification Test
- Verification Test VER-1B - BRAKELIGHT Switch Sensor Circuit
- Verification Test VER-1C - Abs Warning Light Driver Circuit
- Removal & Installation
- Adjustments
- Torque Specifications
- Wiring Diagram
- Anti-Lock Brake System
- Mechanical - Hydraulic
- Disc & Drum
- Traction Control
- Anti-Lock Brake System
- Model Identification
- Description
- Operation
- Bleeding Brake System
- Diagnosis & Testing
- Connector Identification
- Self-Diagnostic Tests
- Notes
- TEST 1A - CHECKING ABS SYSTEM FOR DIAGNOSTIC TROUBLE CODES (DTCs)
- Test 2A - Controller Failure
- Test 3A - Acceleration Switch Not Processable
- Test 5A - Left Front Inlet Valve
- Test 6A - Left Front Outlet Valve
- Test 7A - Left Front Sensor Circuit Failure
- Test 8A - Left Front Sensor
- Test 9A - Rear Inlet Valve
- Test 10A - Rear Outlet Valve
- Test 11A - Left Rear Sensor Circuit Failure
- Test 12A - Left Rear Sensor
- Test 13A - Main Relay/Power Circuit Failure
- Test 13B - Main Relay/Power Circuit Failure
- Test 15A - Pump Motor Circuit Not Working Properly
- Test 15B - Pump Motor Circuit Not Working Properly
- Test 15C - Pump Motor Circuit Not Working Properly
- Test 15D - Pump Motor Circuit Not Working Properly
- Test 15E - Pump Motor Circuit Not Working Properly
- Test 15F - Pump Motor Circuit Not Working Properly
- Test 16A - Right Front Inlet Valve
- Test 17A - Right Front Outlet Valve
- Test 18A - Right Front Sensor Circuit Failure
- Test 19A - Right Front Sensor
- Test 20A - Right Rear Sensor Circuit Failure
- Test 21A - Right Rear Sensor
- Test 22A - Abs Warning Light Illumination Problem
- Test 23A - Scan Tool No Response Message
- Test 24A - Repairing Cycling At End Of A Non-Abs Stop
- Test 25A - Wrong Abs Electronic Control Unit (Ecu)
- Test 26A - Abs Ecu Failure Verification Test
- Verification Test VER-1A - System Verification Test
- Verification Test VER-1B - BRAKELIGHT Switch Sensor Circuit
- Verification Test VER-1C - Abs Warning Light Driver Circuit
- Removal & Installation
- Adjustments
- Torque Specifications
- Wiring Diagram
- Anti-Lock Brake System
- Anti-Lock Brakes
- Drivelines & Axles
- Electrical
- Charging Systems
- Generator
- Description
- Adjustments
- Trouble Shooting
- On-Vehicle Testing
- Notes
- Generator Output
- Entering On-Board Diagnostics
- DRB Test Functions
- Battery Condition Check
- Test TC-1A - Checking For Diagnostic Trouble Codes (DTCS)
- Test TC-33A - Generator Field Not Switching Properly
- Test TC-33B - Generator Field Not Switching Properly
- Test TC-34A - Battery Temp Sensor Volts Out Of Limit
- Test TC-35A - Charging System Voltage Low
- Test TC-36A - Charging System Voltage High
- Test TC-36B - Charging System Voltage High
- Test Ch-1A - Charging System No Code Test
- Charging Verification (VER-3A)
- Test NS-1A - Qualifying No-Start Condition
- Test NS-6A - Correcting No Response Condition
- Test NS-6B - Correcting No Response Condition
- Test NS-6C - Correcting No Response Condition
- Test NTC-1A - No DTC Test Menu
- Test VER-1 - Verification Test VER-1
- Bench Testing
- Overhaul
- Torque Specifications
- Wiring Diagrams
- Generator
- Component Locations
- Fuses & Circuit Breakers
- Identification
- Fuse Panel & Power Distribution Center Location
- Fuse Panel Identification
- Fuse & Circuit Breaker Identification
- 1 - 20 Amp (Yellow)
- 2 - 15 Amp (Blue)
- 3 - 20 Amp (Yellow)
- 4 - 15 Amp (Blue)
- 5 - 15 Amp (Blue)
- 6 - 15 Amp (Blue)
- 7 - 15 Amp (Blue)
- 8 - 15 Amp (Blue)
- 9 - 20 Amp (Yellow)
- 10 - 15 Amp (Blue)
- 11 - 15 Amp (Blue)
- 12 - 15 Amp (Blue)
- 13 - 20 Amp (Yellow)
- 14 - 20 Amp (Yellow)
- 15 - 3 Amp (Violet)
- 16 - 20 Amp (Yellow)
- 17 - 7.5 Amp (Brown)
- 18 - 15 Amp (Blue)
- 19 - 15 Amp (Blue)
- 20 - 10 Amp (Red)
- 21 - 15 Amp (Blue)
- 22 - 15 Amp (Blue)
- 23 - 15 Amp (Blue)
- 24 - 7.5 Amp (Brown)
- 25 - 30 Amp Circuit Breaker
- 26 - 30 Amp Circuit Breaker
- 27 - 10 Amp Circuit Breaker
- 28 - 30 Amp Circuit Breaker
- Power Distribution Center Identification
- Notes
- 1 - 20 Amp (Mini Yellow)
- 2 - 15 Amp (Mini Blue)
- 3 - 20 Amp (Mini Yellow)
- 4 - 15 Amp (Mini Blue)
- 5 - 20 Amp (Mini Yellow)
- 6 - 15 Amp (Mini Blue)
- 7 - 40 Amp (Orange)
- 8 - 60 Amp (Blue)
- 9 - 20 Amp (Yellow)
- 10 - 30 Amp (Green)
- 11 - 30 Amp (Green)
- 12 - 40 Amp (Orange)
- 13 - 60 Amp (Blue)
- 14 - 40 Amp (Orange)
- 15 - 30 Amp (Green)
- 16 - 60 Amp (Blue)
- Relay Center Identification
- Identification
- Gauges
- Starter
- Wiring Diagrams
- System Wiring Diagrams
- Using lemon2025'S Wiring Diagrams
- Air Conditioning
- Anti-Lock Brakes
- Anti-Theft
- Computer Data Lines
- Cruise Control
- Defoggers
- Engine Performance
- Exterior Lights
- Ground Distribution
- Headlights
- Horn
- Instrument Cluster
- Interior Lights
- Power Antenna
- Power Distribution
- Power Door Locks
- Power Mirrors
- Power Seats
- Power Top/Sunroof
- Power Windows
- Radio
- Starting/Charging
- Supplemental Restraints
- Transmission
- Warning Systems
- Wiper/Washer
- Using lemon2025'S System Wiring Diagrams
- System Wiring Diagrams
- Charging Systems
- Engine Mechanical
- Accessory Drive Belts
- Cooling Fans
- Cooling System (Mechanical)
- Mechanical
- 4.0L 6-CYL - VIN [S]
- Engine Identification
- Adjustments
- Removal & Installation
- Overhaul
- Engine Oiling
- Torque Specifications
- Engine Specifications
- 4.0L 6-CYL - VIN [S]
- Starter
- Engine Performance
- Engine Controls - Adjustments - 4.0L
- Application
- Emissions
- Emission Applications
- Emission Control Abbreviations
- State Emission Standards - Diesel
- State Emission Standards - Gas
- ALASKA
- ARIZONA
- CALIFORNIA
- Colorado
- CONNECTICUT
- DELAWARE
- District Of COLUMBIA
- GEORGIA
- IDAHO
- ILLINOIS
- INDIANA
- KENTUCKY
- MARYLAND
- MASSACHUSETTS
- MISSOURI
- NEVADA
- New Jersey
- New MEXICO
- New YORK
- North CAROLINA
- OHIO
- OREGON
- PENNSYLVANIA
- RHODE Island
- TENNESSEE
- TEXAS
- UTAH
- VIRGINIA
- WASHINGTON
- WISCONSIN
- U. S. EPA ASM2525 & ASM5015 Start-Up Emission Standards
- U. S. EPA Revised Final ASM Emission Standards (ASM5015 & ASM2525)
- U.S. EPA Im240 Emission Standards
- Remove, Overhaul & Install
- Engine Controls - Specifications - 4.0L
- System
- EGR Function Testing
- Engine Controls - Basic Testing - 4.0L
- Introduction
- Computerized Engine Controls
- Powertrain Control Module (Pcm)
- Input Devices
- Notes
- A/C Pressure Switch & Evaporator Switch
- Generator
- Automatic Shutdown (ASD) Relay Input Signal
- Battery Voltage Signal
- Brake Switch
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Heated Oxygen Sensor (HO2S)
- Ignition Circuit
- Intake Air Temperature (IAT) Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Park/Neutral Switch
- Power Steering Pressure Switch
- Serial Communications Interface (SCI) Receive
- Cruise Control Switches
- Throttle Position (TP) Sensor
- Vehicle Speed Sensor (VSS)
- Vehicle Theft Alarm (Grand Cherokee)
- Output Signals
- Notes
- A/C Compressor Clutch Relay
- Generator Light
- Automatic Shutdown (ASD) Relay
- Cruise Control Servo
- EGR Valve Control Solenoid
- Evaporative Emission System
- Fuel Injectors
- Fuel Pump Relay
- Idle Air Control (IAC) Motor
- Ignition Coil
- Injection Timing
- Malfunction Indicator Light (MIL)
- Radiator Cooling Fan Relay
- Serial Communication Interface (SCI) Transmit
- Upshift Indicator Light (M/T)
- Fuel System
- Ignition System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Controls
- Wiring Diagrams
- Engine Controls - System/Component Tests - 4.0L
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Modules, Motors & Relays
- Fuel System
- Idle Control System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous Controls
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 4.0L
- Introduction
- Model Identification
- Self-Diagnostic System
- Inactive DTC Condition
- Using Scan Tool
- Anti-Theft System
- Diagnostic Trouble Codes/Messages
- CODES/MESSAGES (Note: For DTC table, see TEST TC-1A under "Self-Diagnostic Tests.")
- Connector Identification
- Self-Diagnostic Tests
- Test TC-1A - Checking For DTCS
- Test TC-2A - No Crank Reference Signal At Pcm (DTC 11)
- Test TC-2B - No Crank Reference Signal At Pcm
- Test TC-3A - No Cam Sync Signal At Pcm (DTC 54)
- Test TC-4A - No Change In Map From Start To Run (DTC 13)
- Test TC-5A - Map Sensor Voltage Too Low (DTC 14)
- Test TC-6A - Map Sensor Voltage Too High (DTC 14)
- Test TC-7A - No Vehicle Speed Sensor Signal (DTC 15)
- Test TC-7B - No Vehicle Speed Sensor Signal
- Test TC-8A - Oxygen Sensor (O2S) Stays At Center (DTC 21)
- Test TC-9A - Oxygen Sensor (O2S) Shorted To Voltage (DTC 21)
- Test TC-10A - Oxygen Sensor (O2S) Stays Above Center (Rich) (DTC 52)
- Test TC-11A - Oxygen Sensor (O2S) Stays Below Center (Lean) (DTC 51)
- Test TC-12A - ECT Sensor Voltage Too High (DTC 22)
- Test TC-13A - ECT Sensor Voltage Too Low (DTC 22)
- Test TC-14A - Intake Air Temp Sensor Voltage Low (DTC 23)
- Test TC-15A - Intake Air Temp Sensor Voltage High (DTC 23)
- Test TC-16A - Throttle Position Sensor Voltage High (DTC 24)
- Test TC-17A - Throttle Position Sensor Voltage Low (DTC 24)
- Test TC-18A - Idle Air Control Motor Circuits (DTC 25)
- Test TC-18B - Idle Air Control Motor Circuits
- Test TC-18C - Idle Air Control Motor Circuits
- Test TC-18D - Idle Air Control Motor Circuits
- Test TC-18E - Idle Air Control Motor Circuits
- Test TC-19A - Injector Control Circuit (DTC 27)
- Test TC-19B - Injector #1 Control Circuit
- Test TC-20A - Injector #2 Control Circuit (DTC 27)
- Test TC-21A - Injector #3 Control Circuit (DTC 27)
- Test TC-22A - Injector #4 Control Circuit (DTC 27)
- Test TC-23A - Injector #5 Control Circuit (DTC 27)
- Test TC-24A - Injector #6 Control Circuit (DTC 27)
- Test TC-25A - A/C Clutch Relay Circuit (DTC 33)
- Test TC-26A - Rad Fan Control Relay Circuit (DTC 35)
- Test TC-27A - Auto Shutdown Relay Control Circuit (DTC 42)
- Test TC-28A - No ASD Relay Volt Sense At Pcm (DTC 42)
- Test TC-29A - Pcm Failure Sri Mile Not Stored (DTC 62)
- Test TC-30A - Pcm Failure EEPROM Write Denied (DTC 63)
- Test TC-37A - TCC Solenoid (Relay) Circuit (DTC 37)
- Test TC-38A - EVAP Solenoid Circuit (DTC 31)
- Test TC-38B - EVAP Solenoid Circuit
- Test NTC-1A - No Diagnostic Trouble Code (DTC) Test Menu
- Test NTC-2A - Checking Secondary Ignition & Timing
- Test NTC-3A - Checking Fuel Pressure
- Test NTC-3B - Checking Fuel Pressure
- Test NTC-4A - Checking Coolant Sensor Calibration
- Test NTC-5A - Checking TPS Calibration
- Test NTC-6A - Checking Map Sensor Calibration
- Test NTC-7A - Checking Oxygen Sensor (O2S) Switching
- Test NTC-7B - Checking Oxygen Sensor (O2S) Switching
- Test NTC-8A - Checking Oxygen Sensor (O2S) Heater
- Test NTC-9A - Checking Idle Air Control (IAC) Motor
- Test NTC-9B - Checking Idle Air Control Motor
- Test NTC-10A - Checking Park/Neutral Position Switch
- Test NTC-11A - Checking Pcm Power & Ground Circuits
- Test NTC-12A - Checking Engine Vacuum
- Test NTC-13A - No DTC Mechanical Test
- No-Start Tests
- Test NS-1A - Qualifying No-Start Condition
- Test NS-2A - Inspecting Fuel System
- Test NS-3A - Inspecting Mechanical System
- Test NS-4A - Correcting Fuel Delivery
- Test NS-4B - Correcting Fuel Delivery
- Test NS-5A - Inspecting Fuel Pump
- Test NS-5B - Inspecting Fuel Pump
- Test NS-6A - Correcting A No Response Condition
- Test NS-6B - Correcting No Response Condition
- Test NS-6C - Correcting No Response Condition
- Test NS-7A - Inspecting Idle Air Control Motor Operation
- Test NS-7B - Inspecting Idle Air Control Motor Operation
- Test NS-7C - Inspecting Idle Air Control Motor Operation
- Test NS-7D - Inspecting Idle Air Control Motor Operation
- Test NS-7E - Inspecting Idle Air Control Motor Operation
- Test NS-8A - Correcting Start & Stall Condition
- Test NS-9A - Repairing A No Crank Condition
- Test NS-9B - Repairing A No Crank Condition
- Test NS-9C - Repairing A No Crank Condition
- Verification Tests
- Wiring Diagrams
- Engine Controls - Tests W/Codes - Body Control Computer
- Description
- Model Identification
- Operation
- Self-Diagnostic System
- Diagnostic Procedure
- Connector Identification
- Self-Diagnostic Tests
- Test 1A - Identifying Vehicle Equipment & System Problems
- Test 1B - Identifying DTCS
- Test 2A - Chime System Problems
- Test 3A - No Chimes At All
- Test 4A - Chime Operates With Seat Belt Buckled
- Test 5A - Chime Operates W/ LF Door Open & Key Out Of Ignition
- Test 6A - No Chime W/ Key Out, Ext Lamps On & LF Door Open
- Test 7A - No Chime With Ignition Off, Key In Ignition & LF Door Open
- Test 8A - No Chime With Seat Belt Unfastened & Key On For 6 Seconds
- Test 9A - No Chime With Turn Signals On
- Test 9B - Left Turn Signal Circuit
- Test 9C - Right Turn Signal Circuit
- Test 15A - Compass/Mini-Trip Computer Module Problems
- Test 16A - Testing Ambient Temperature Sensor Circuit
- Test 17A - Testing CMTC Mileage & Economy Functions
- Test 18A - Testing CMTC Switches
- Test 19A - Testing Estimated Time Function
- Test 20A - Repairing CMTC No Response
- Test 21A - Courtesy Lamp System
- Test 22A - Courtesy Lamps Inoperative
- Test 22B - Courtesy Lamps Inoperative Power Circuit
- Test 22C - Courtesy Lamp Inputs
- Test 23A - Inoperative Individual Courtesy Lamp
- Test 24A - Courtesy Lamps Inoperative With Dome Lamp Switch
- Test 25A - Courtesy Lamps On At All Times
- Test 26A - Open Left Door Ajar Circuit
- Test 26B - Shorted Left Door Ajar Circuit
- Test 27A - Open Right Door Ajar Circuit
- Test 27B - Shorted Right Door Ajar Circuit
- Test 28A - Open Side Door Ajar Circuit
- Test 28B - Shorted Side Door Ajar Circuit
- Test 29A - Open Liftgate Ajar Circuit
- Test 29B - Shorted Liftgate Ajar Circuit
- Test 30A - Electronic Instrument Cluster (EIC) Problems
- Test 31A - EIC No Response Condition
- Test 31B - Fused Ignition Switch Output To EIC
- Test 31C - EIC Battery Power Supply
- Test 32A - EIC Diagnostic Trouble Codes
- Test 33A - EIC Id Circuits
- Test 34A - EIC Switch Operation
- Test 35A - EIC Gauge Problems
- Test 36A - Odometer/Speedometer Failure
- Test 37A - Identifying Faulty EIC Warning Lamp
- Test 38A - Instrument Cluster Or CMTC Illumination
- Test 38B - Open Pod Switch Control Circuits
- Test 39A - Park Lamp Operation
- Test 40A - Shorted Park Lamp Power Supply
- Test 41A - Shorted Instrument Cluster Power Supply
- Test 42A - Electro/Mechanical Instrument Cluster Diagnostics
- Test 43A - Electro/Mechanical Id Circuits
- Test 44A - Faulty Mic Gauge
- Test 45A - Tachometer Circuit
- Test 46A - Open Mic Sensor Circuits
- Test 47A - Faulty Individual Gauge
- Test 48A - Faulty Speedometer/Odometer
- Test 49A - Faulty Premium Mic Warning Lamp
- Test 50A - Faulty Base Mic Warning Lamp
- Test 51A - Low Fuel Warning Lamp
- Test 52A - Inoperative Warning Lamp
- Test 53A - Check Gauges Lamp
- Test 54A - Check Gauges Lamp On & All Gauges Inoperative
- Test 55A - Door Ajar Warning Lamp
- Test 56A - Voltage Lamp (Battery Symbol)
- Test 57A - Identifying Headlamp Time Delay Problems
- Test 58A - Headlamps Will Not Turn Off
- Test 59A - Headlamps Will Not Turn On
- Test 60A - Illuminated Entry System Problems
- Test 60B - Left Door Handle Switch Circuit
- Test 60C - Right Door Handle Switch Circuit
- Test 61A - Illuminated Entry Inoperative With Both Doors
- Test 62A - Illuminated Entry INOPRTVE W/ Remote Keyless Entry
- Test 63A - Key-In Lamp Circuit
- Test 64A - Inoperative Key-In Lamp
- Test 65A - Key-In Lamp On Constantly
- Test 66A - Identifying Liftgate Release Problem
- Test 68A - Repairing Liftgate Release Problem
- Test 68B - Shorted Liftgate Circuit
- Test 69A - Identifying Power Door Lock Problems
- Test 70A - Diagnosing Door Lock & Unlock Circuit
- Test 71A - Door Lock & Unlock Circuit From One Switch
- Test 72A - Doors Fail To Lock From Any Switch
- Test 72B - Shorted Key-In Ignition Circuit
- Test 73A - Doors Fail To Lock From One Switch
- Test 74A - Doors Fail To Unlock From Any Switch
- Test 75A - Doors Fail To Unlock From One Switch
- Test 76A - One Door Fails To Lock & Unlock From Any Switch
- Test 77A - Diagnosing Door Lock Circuit
- Test 78A - Identifying Power Door Lock Problems With Remote Keyless Entry (RKE)
- Test 79A - LF Door (With RKE) Fails To Lock & Unlock
- Test 80A - LF Door (With RKE) Fails To Lock From Any Switch
- Test 81A - LF Door (With RKE) Fails To Unlock From Any Switch
- Test 82A - All Doors (W/ RKE) Except LF Fail To Lock & Unlock
- Test 83A - All Doors (With RKE) Except LF Fail To Lock
- Test 84A - All Doors (With RKE) Except LF Fail To Unlock
- Test 85A - Repairing RKE System
- Test 86A - Identifying CCD Radio Problems
- Test 86B - CCD Radio Diagnostic Trouble Codes
- Test 86C - Shorted Left (L) Channel
- Test 86D - Shorted Right (R) Channel
- Test 86E - Antenna Error
- Test 87A - Radio No Response Condition
- Test 87B - Radio No Response Condition
- Test 88A - No Sound From One Speaker
- Test 88B - No Sound From One Speaker
- Test 89A - No Sound From All Speakers
- Test 90A - Poor Sound Quality From One Speaker
- Test 91A - Poor Sound Quality From All Speakers
- Test 91B - Poor Sound Quality From All Speakers
- Test 92A - Seat Belt Warning Lamp Problems
- Test 93A - Inoperative Seat Belt Lamp
- Test 93B - Inoperative Seat Belt Lamp
- Test 93C - Inoperative Seat Belt Lamp
- Test 94A - Seat Belt Lamp On Constantly
- Test 95A - Diagnosing Side Door Memory Lock
- Test 96A - Identifying Intermittent Wiper Problem
- Test 97A - Repairing Intermittent Wiper Problem
- Test 97B - Diagnosing Intermittent Wiper Problem
- Test 98A - Repairing Washer Pump Problem
- Test 99A - Wiper Problem During Wash Mode
- Test 100A - Repairing Wiper Park Switch
- Test 101A - Repairing Fuel Level Sending Unit
- Test 102A - Repairing Oil Pressure Sending Unit
- Test 103A - Diagnosing Oil Indicator Light (On Base Mic)
- Test 103B - Open Oil Pressure Sending Unit
- Test 103C - Repairing Oil Pressure Sending Unit (W/ Oil Gauge)
- Test 103D - Open Oil Pressure Sending Unit Signal Circuit
- Test 103E - Grounded Oil Pressure Sending Unit (Base & Premium Mics)
- Test 103F - Grounded Oil Pressure Sending Unit (On Base Mic)
- Test 104A - EIC Repairing Temperature Gauge Problems
- Test 105A - Repairing Faulty Washer Fluid Level Circuit
- Test 106A - Body Control Module No Response
- Test 106B - Body Control Module Ignition Power Supply
- Test 106C - Body Control Module Battery Power Supply
- Test 107A - Repairing Powertrain Control Module No Response Condition
- Test 108A - Repairing Scan Tool Blank Screen
- Test VER-1B - Verification Procedure
- Module Location
- Vehicle Communication Tests
- Notes
- Test 1A - Trouble Codes
- Test 2A - Blank Scan Tool Message Screen
- Test 3A - Ram Test Failure
- Test 4A - Cartridge Error
- Test 5A - Key Pad Test Failure
- Test 6A - Low Or High Battery
- Test 7A - Short To Battery
- Test 7B - Short To Battery
- Test 7C - Short To Battery
- Test 7E - Short To Battery
- Test 7F - Short To Battery
- Test 8A - Short To 5 Volts
- Test 8B - Short To 5 Volts
- Test 8E - Short To 5 Volts
- Test 8F - Short To 5 Volts
- Test 8G - Short To 5 Volts
- Test 9A - Short To Ground
- Test 9B - Short To Ground
- Test 10A - Bus (+) & Bus (-) Shorted Together
- Test 11A - No Termination
- Test 11F - No Termination (Exc Wrangler)
- Test 11J - No Termination (Wrangler)
- Test 12A - Bus Bias Level Or Bus (+/-) Open
- Test 12F - Bus Bias Level Or Bus (+/-) Open (Exc Wrangler)
- Test 12J - Bus Bias Level Or Bus (+/-) Open (Wrangler)
- Test 13A - No Bus Bias
- Test 13F - No Bus Bias (Exc Wrangler)
- Test 13G - No Bus Bias (Exc Wrangler)
- Test 13J - No Bus Bias (Wrangler)
- Test 14A - Not Receiving Bus Messages Correctly
- Test VER-1 - Verification Procedure
- Wiring Diagrams
- Engine Controls - Tests W/O Codes
- O2 Sensor Location & Identification
- Testing & Diagnosis
- EGR Function Testing
- Engine Controls - Basic Testing - 4.0L
- Introduction
- Computerized Engine Controls
- Powertrain Control Module (Pcm)
- Input Devices
- Notes
- A/C Pressure Switch & Evaporator Switch
- Generator
- Automatic Shutdown (ASD) Relay Input Signal
- Battery Voltage Signal
- Brake Switch
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Heated Oxygen Sensor (HO2S)
- Ignition Circuit
- Intake Air Temperature (IAT) Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Park/Neutral Switch
- Power Steering Pressure Switch
- Serial Communications Interface (SCI) Receive
- Cruise Control Switches
- Throttle Position (TP) Sensor
- Vehicle Speed Sensor (VSS)
- Vehicle Theft Alarm (Grand Cherokee)
- Output Signals
- Notes
- A/C Compressor Clutch Relay
- Generator Light
- Automatic Shutdown (ASD) Relay
- Cruise Control Servo
- EGR Valve Control Solenoid
- Evaporative Emission System
- Fuel Injectors
- Fuel Pump Relay
- Idle Air Control (IAC) Motor
- Ignition Coil
- Injection Timing
- Malfunction Indicator Light (MIL)
- Radiator Cooling Fan Relay
- Serial Communication Interface (SCI) Transmit
- Upshift Indicator Light (M/T)
- Fuel System
- Ignition System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Controls
- Wiring Diagrams
- Engine Controls - System/Component Tests - 4.0L
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Modules, Motors & Relays
- Fuel System
- Idle Control System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous Controls
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 4.0L
- Introduction
- Model Identification
- Self-Diagnostic System
- Inactive DTC Condition
- Using Scan Tool
- Anti-Theft System
- Diagnostic Trouble Codes/Messages
- CODES/MESSAGES (Note: For DTC table, see TEST TC-1A under "Self-Diagnostic Tests.")
- Connector Identification
- Self-Diagnostic Tests
- Test TC-1A - Checking For DTCS
- Test TC-2A - No Crank Reference Signal At Pcm (DTC 11)
- Test TC-2B - No Crank Reference Signal At Pcm
- Test TC-3A - No Cam Sync Signal At Pcm (DTC 54)
- Test TC-4A - No Change In Map From Start To Run (DTC 13)
- Test TC-5A - Map Sensor Voltage Too Low (DTC 14)
- Test TC-6A - Map Sensor Voltage Too High (DTC 14)
- Test TC-7A - No Vehicle Speed Sensor Signal (DTC 15)
- Test TC-7B - No Vehicle Speed Sensor Signal
- Test TC-8A - Oxygen Sensor (O2S) Stays At Center (DTC 21)
- Test TC-9A - Oxygen Sensor (O2S) Shorted To Voltage (DTC 21)
- Test TC-10A - Oxygen Sensor (O2S) Stays Above Center (Rich) (DTC 52)
- Test TC-11A - Oxygen Sensor (O2S) Stays Below Center (Lean) (DTC 51)
- Test TC-12A - ECT Sensor Voltage Too High (DTC 22)
- Test TC-13A - ECT Sensor Voltage Too Low (DTC 22)
- Test TC-14A - Intake Air Temp Sensor Voltage Low (DTC 23)
- Test TC-15A - Intake Air Temp Sensor Voltage High (DTC 23)
- Test TC-16A - Throttle Position Sensor Voltage High (DTC 24)
- Test TC-17A - Throttle Position Sensor Voltage Low (DTC 24)
- Test TC-18A - Idle Air Control Motor Circuits (DTC 25)
- Test TC-18B - Idle Air Control Motor Circuits
- Test TC-18C - Idle Air Control Motor Circuits
- Test TC-18D - Idle Air Control Motor Circuits
- Test TC-18E - Idle Air Control Motor Circuits
- Test TC-19A - Injector Control Circuit (DTC 27)
- Test TC-19B - Injector #1 Control Circuit
- Test TC-20A - Injector #2 Control Circuit (DTC 27)
- Test TC-21A - Injector #3 Control Circuit (DTC 27)
- Test TC-22A - Injector #4 Control Circuit (DTC 27)
- Test TC-23A - Injector #5 Control Circuit (DTC 27)
- Test TC-24A - Injector #6 Control Circuit (DTC 27)
- Test TC-25A - A/C Clutch Relay Circuit (DTC 33)
- Test TC-26A - Rad Fan Control Relay Circuit (DTC 35)
- Test TC-27A - Auto Shutdown Relay Control Circuit (DTC 42)
- Test TC-28A - No ASD Relay Volt Sense At Pcm (DTC 42)
- Test TC-29A - Pcm Failure Sri Mile Not Stored (DTC 62)
- Test TC-30A - Pcm Failure EEPROM Write Denied (DTC 63)
- Test TC-37A - TCC Solenoid (Relay) Circuit (DTC 37)
- Test TC-38A - EVAP Solenoid Circuit (DTC 31)
- Test TC-38B - EVAP Solenoid Circuit
- Test NTC-1A - No Diagnostic Trouble Code (DTC) Test Menu
- Test NTC-2A - Checking Secondary Ignition & Timing
- Test NTC-3A - Checking Fuel Pressure
- Test NTC-3B - Checking Fuel Pressure
- Test NTC-4A - Checking Coolant Sensor Calibration
- Test NTC-5A - Checking TPS Calibration
- Test NTC-6A - Checking Map Sensor Calibration
- Test NTC-7A - Checking Oxygen Sensor (O2S) Switching
- Test NTC-7B - Checking Oxygen Sensor (O2S) Switching
- Test NTC-8A - Checking Oxygen Sensor (O2S) Heater
- Test NTC-9A - Checking Idle Air Control (IAC) Motor
- Test NTC-9B - Checking Idle Air Control Motor
- Test NTC-10A - Checking Park/Neutral Position Switch
- Test NTC-11A - Checking Pcm Power & Ground Circuits
- Test NTC-12A - Checking Engine Vacuum
- Test NTC-13A - No DTC Mechanical Test
- No-Start Tests
- Test NS-1A - Qualifying No-Start Condition
- Test NS-2A - Inspecting Fuel System
- Test NS-3A - Inspecting Mechanical System
- Test NS-4A - Correcting Fuel Delivery
- Test NS-4B - Correcting Fuel Delivery
- Test NS-5A - Inspecting Fuel Pump
- Test NS-5B - Inspecting Fuel Pump
- Test NS-6A - Correcting A No Response Condition
- Test NS-6B - Correcting No Response Condition
- Test NS-6C - Correcting No Response Condition
- Test NS-7A - Inspecting Idle Air Control Motor Operation
- Test NS-7B - Inspecting Idle Air Control Motor Operation
- Test NS-7C - Inspecting Idle Air Control Motor Operation
- Test NS-7D - Inspecting Idle Air Control Motor Operation
- Test NS-7E - Inspecting Idle Air Control Motor Operation
- Test NS-8A - Correcting Start & Stall Condition
- Test NS-9A - Repairing A No Crank Condition
- Test NS-9B - Repairing A No Crank Condition
- Test NS-9C - Repairing A No Crank Condition
- Verification Tests
- Wiring Diagrams
- Engine Controls - Tests W/Codes - Body Control Computer
- Description
- Model Identification
- Operation
- Self-Diagnostic System
- Diagnostic Procedure
- Connector Identification
- Self-Diagnostic Tests
- Test 1A - Identifying Vehicle Equipment & System Problems
- Test 1B - Identifying DTCS
- Test 2A - Chime System Problems
- Test 3A - No Chimes At All
- Test 4A - Chime Operates With Seat Belt Buckled
- Test 5A - Chime Operates W/ LF Door Open & Key Out Of Ignition
- Test 6A - No Chime W/ Key Out, Ext Lamps On & LF Door Open
- Test 7A - No Chime With Ignition Off, Key In Ignition & LF Door Open
- Test 8A - No Chime With Seat Belt Unfastened & Key On For 6 Seconds
- Test 9A - No Chime With Turn Signals On
- Test 9B - Left Turn Signal Circuit
- Test 9C - Right Turn Signal Circuit
- Test 15A - Compass/Mini-Trip Computer Module Problems
- Test 16A - Testing Ambient Temperature Sensor Circuit
- Test 17A - Testing CMTC Mileage & Economy Functions
- Test 18A - Testing CMTC Switches
- Test 19A - Testing Estimated Time Function
- Test 20A - Repairing CMTC No Response
- Test 21A - Courtesy Lamp System
- Test 22A - Courtesy Lamps Inoperative
- Test 22B - Courtesy Lamps Inoperative Power Circuit
- Test 22C - Courtesy Lamp Inputs
- Test 23A - Inoperative Individual Courtesy Lamp
- Test 24A - Courtesy Lamps Inoperative With Dome Lamp Switch
- Test 25A - Courtesy Lamps On At All Times
- Test 26A - Open Left Door Ajar Circuit
- Test 26B - Shorted Left Door Ajar Circuit
- Test 27A - Open Right Door Ajar Circuit
- Test 27B - Shorted Right Door Ajar Circuit
- Test 28A - Open Side Door Ajar Circuit
- Test 28B - Shorted Side Door Ajar Circuit
- Test 29A - Open Liftgate Ajar Circuit
- Test 29B - Shorted Liftgate Ajar Circuit
- Test 30A - Electronic Instrument Cluster (EIC) Problems
- Test 31A - EIC No Response Condition
- Test 31B - Fused Ignition Switch Output To EIC
- Test 31C - EIC Battery Power Supply
- Test 32A - EIC Diagnostic Trouble Codes
- Test 33A - EIC Id Circuits
- Test 34A - EIC Switch Operation
- Test 35A - EIC Gauge Problems
- Test 36A - Odometer/Speedometer Failure
- Test 37A - Identifying Faulty EIC Warning Lamp
- Test 38A - Instrument Cluster Or CMTC Illumination
- Test 38B - Open Pod Switch Control Circuits
- Test 39A - Park Lamp Operation
- Test 40A - Shorted Park Lamp Power Supply
- Test 41A - Shorted Instrument Cluster Power Supply
- Test 42A - Electro/Mechanical Instrument Cluster Diagnostics
- Test 43A - Electro/Mechanical Id Circuits
- Test 44A - Faulty Mic Gauge
- Test 45A - Tachometer Circuit
- Test 46A - Open Mic Sensor Circuits
- Test 47A - Faulty Individual Gauge
- Test 48A - Faulty Speedometer/Odometer
- Test 49A - Faulty Premium Mic Warning Lamp
- Test 50A - Faulty Base Mic Warning Lamp
- Test 51A - Low Fuel Warning Lamp
- Test 52A - Inoperative Warning Lamp
- Test 53A - Check Gauges Lamp
- Test 54A - Check Gauges Lamp On & All Gauges Inoperative
- Test 55A - Door Ajar Warning Lamp
- Test 56A - Voltage Lamp (Battery Symbol)
- Test 57A - Identifying Headlamp Time Delay Problems
- Test 58A - Headlamps Will Not Turn Off
- Test 59A - Headlamps Will Not Turn On
- Test 60A - Illuminated Entry System Problems
- Test 60B - Left Door Handle Switch Circuit
- Test 60C - Right Door Handle Switch Circuit
- Test 61A - Illuminated Entry Inoperative With Both Doors
- Test 62A - Illuminated Entry INOPRTVE W/ Remote Keyless Entry
- Test 63A - Key-In Lamp Circuit
- Test 64A - Inoperative Key-In Lamp
- Test 65A - Key-In Lamp On Constantly
- Test 66A - Identifying Liftgate Release Problem
- Test 68A - Repairing Liftgate Release Problem
- Test 68B - Shorted Liftgate Circuit
- Test 69A - Identifying Power Door Lock Problems
- Test 70A - Diagnosing Door Lock & Unlock Circuit
- Test 71A - Door Lock & Unlock Circuit From One Switch
- Test 72A - Doors Fail To Lock From Any Switch
- Test 72B - Shorted Key-In Ignition Circuit
- Test 73A - Doors Fail To Lock From One Switch
- Test 74A - Doors Fail To Unlock From Any Switch
- Test 75A - Doors Fail To Unlock From One Switch
- Test 76A - One Door Fails To Lock & Unlock From Any Switch
- Test 77A - Diagnosing Door Lock Circuit
- Test 78A - Identifying Power Door Lock Problems With Remote Keyless Entry (RKE)
- Test 79A - LF Door (With RKE) Fails To Lock & Unlock
- Test 80A - LF Door (With RKE) Fails To Lock From Any Switch
- Test 81A - LF Door (With RKE) Fails To Unlock From Any Switch
- Test 82A - All Doors (W/ RKE) Except LF Fail To Lock & Unlock
- Test 83A - All Doors (With RKE) Except LF Fail To Lock
- Test 84A - All Doors (With RKE) Except LF Fail To Unlock
- Test 85A - Repairing RKE System
- Test 86A - Identifying CCD Radio Problems
- Test 86B - CCD Radio Diagnostic Trouble Codes
- Test 86C - Shorted Left (L) Channel
- Test 86D - Shorted Right (R) Channel
- Test 86E - Antenna Error
- Test 87A - Radio No Response Condition
- Test 87B - Radio No Response Condition
- Test 88A - No Sound From One Speaker
- Test 88B - No Sound From One Speaker
- Test 89A - No Sound From All Speakers
- Test 90A - Poor Sound Quality From One Speaker
- Test 91A - Poor Sound Quality From All Speakers
- Test 91B - Poor Sound Quality From All Speakers
- Test 92A - Seat Belt Warning Lamp Problems
- Test 93A - Inoperative Seat Belt Lamp
- Test 93B - Inoperative Seat Belt Lamp
- Test 93C - Inoperative Seat Belt Lamp
- Test 94A - Seat Belt Lamp On Constantly
- Test 95A - Diagnosing Side Door Memory Lock
- Test 96A - Identifying Intermittent Wiper Problem
- Test 97A - Repairing Intermittent Wiper Problem
- Test 97B - Diagnosing Intermittent Wiper Problem
- Test 98A - Repairing Washer Pump Problem
- Test 99A - Wiper Problem During Wash Mode
- Test 100A - Repairing Wiper Park Switch
- Test 101A - Repairing Fuel Level Sending Unit
- Test 102A - Repairing Oil Pressure Sending Unit
- Test 103A - Diagnosing Oil Indicator Light (On Base Mic)
- Test 103B - Open Oil Pressure Sending Unit
- Test 103C - Repairing Oil Pressure Sending Unit (W/ Oil Gauge)
- Test 103D - Open Oil Pressure Sending Unit Signal Circuit
- Test 103E - Grounded Oil Pressure Sending Unit (Base & Premium Mics)
- Test 103F - Grounded Oil Pressure Sending Unit (On Base Mic)
- Test 104A - EIC Repairing Temperature Gauge Problems
- Test 105A - Repairing Faulty Washer Fluid Level Circuit
- Test 106A - Body Control Module No Response
- Test 106B - Body Control Module Ignition Power Supply
- Test 106C - Body Control Module Battery Power Supply
- Test 107A - Repairing Powertrain Control Module No Response Condition
- Test 108A - Repairing Scan Tool Blank Screen
- Test VER-1B - Verification Procedure
- Module Location
- Vehicle Communication Tests
- Notes
- Test 1A - Trouble Codes
- Test 2A - Blank Scan Tool Message Screen
- Test 3A - Ram Test Failure
- Test 4A - Cartridge Error
- Test 5A - Key Pad Test Failure
- Test 6A - Low Or High Battery
- Test 7A - Short To Battery
- Test 7B - Short To Battery
- Test 7C - Short To Battery
- Test 7E - Short To Battery
- Test 7F - Short To Battery
- Test 8A - Short To 5 Volts
- Test 8B - Short To 5 Volts
- Test 8E - Short To 5 Volts
- Test 8F - Short To 5 Volts
- Test 8G - Short To 5 Volts
- Test 9A - Short To Ground
- Test 9B - Short To Ground
- Test 10A - Bus (+) & Bus (-) Shorted Together
- Test 11A - No Termination
- Test 11F - No Termination (Exc Wrangler)
- Test 11J - No Termination (Wrangler)
- Test 12A - Bus Bias Level Or Bus (+/-) Open
- Test 12F - Bus Bias Level Or Bus (+/-) Open (Exc Wrangler)
- Test 12J - Bus Bias Level Or Bus (+/-) Open (Wrangler)
- Test 13A - No Bus Bias
- Test 13F - No Bus Bias (Exc Wrangler)
- Test 13G - No Bus Bias (Exc Wrangler)
- Test 13J - No Bus Bias (Wrangler)
- Test 14A - Not Receiving Bus Messages Correctly
- Test VER-1 - Verification Procedure
- Wiring Diagrams
- Engine Controls - Tests W/O Codes
- O2 Sensor Location & Identification
- Theory and Operation
- Engine Controls - Theory & Operation - 4.0L
- Introduction
- Computerized Engine Controls
- Powertrain Control Module (Pcm)
- Input Devices
- Notes
- A/C Pressure Switch & Evaporator Switch
- Generator
- Automatic Shutdown (ASD) Relay Input Signal
- Battery Voltage Signal
- Brake Switch
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Heated Oxygen Sensor (HO2S)
- Ignition Circuit
- Intake Air Temperature (IAT) Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Park/Neutral Switch
- Serial Communications Interface (SCI) Receive
- Cruise Control Switches
- Throttle Position (TP) Sensor
- Vehicle Speed Sensor (VSS)
- Vehicle Theft Alarm (Grand Cherokee)
- Output Signals
- Notes
- A/C Compressor Clutch Relay
- Generator Light
- Automatic Shutdown (ASD) Relay
- Cruise Control Servo
- EGR Valve Control Solenoid
- Evaporative Emission System
- Fuel Injectors
- Fuel Pump Relay
- Idle Air Control (IAC) Motor
- Ignition Coil
- Injection Timing
- Malfunction Indicator Light (MIL)
- Radiator Cooling Fan Relay
- Serial Communication Interface (SCI) Transmit
- Upshift Indicator Light (M/T)
- Fuel System
- Ignition System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Controls
- Wiring Diagrams
- Engine Controls - Theory & Operation - 4.0L
- Vacuum Diagrams - 4.0L
- Wiring Diagrams - 4.0L
- General Information
- Abbreviations
- Basic Trouble Shooting
- Basic Trouble Shooting - General Information
- Commonly Used Abbreviations - General Information
- Emission Control Abbreviations
- Engine Performance - Trouble Shooting - General Information
- Brakes
- Anti-Lock Brake Safety Precautions - General Information
- Map - Brake Systems
- Brake Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Accelerometers
- Accumulators
- Anchor Pins
- Anti-Lock Brake Control Assembly(Module)
- Anti-Lock Brake Controller
- Anti-Lock Brake Systems
- Axle Seal
- Backing Plates
- Bleeder Screw
- Brake Abs Active Light (Blue)
- Brake Fluid
- Brake Friction Material
- Brake On - Off Switch
- Brake Pads
- Brake Pedals
- Brake Shoe Hardware
- Brake Shoes
- Brake Stoplight Switches
- Brake Warning Light (Amber)
- Brake Warning Light (Red)
- Bulb Sockets
- Bulbs And LEDS
- Caliper Hardware
- Caliper Mounting Pin
- Caliper Piston
- Caliper Shim
- Caliper Slider Pin (Bolt) Dust Boot
- Caliper Slider Pin (Bolt)
- Calipers
- Combination Valve
- Controllers
- Digital Ratio Axle Controllers And Buffers (Drab And Dram)
- Disable Switches
- Drums
- Electrical Brake Pumps
- Electrical Park Motor
- Electrical Pumps And Motors
- Electro-Magnetic Interference
- Electronic Brake Control Modulator
- Electronic Brake Distribution
- Electronic Brake Traction Control Module
- Electronic Controllers
- Electronic Traction Control
- External Brake Cable
- Flow Control Valve
- Fluid Level Sensor Switches
- Fluid
- Four Wheel Drive Switches
- Friction Material
- G Sensors
- Gaskets
- Gravitational Switches
- Grease Seal
- Height Sensing Proportioning Valve
- High Pressure Accumulator
- Hoses
- Hub
- Hydraulic Control Unit
- Hydraulic Modulators
- Hydro-Boosters
- Hydro-Electric Boosters (POWERMASTER)
- Ignition Disable Switches
- Lamp Driver Relay
- Lateral Acceleration Switches
- LEDS
- Lenses
- Low Pressure Accumulator
- Lug Nut
- Master Cylinder Cover Gasket
- Master Cylinders
- Modulators
- Motor Pack
- Motors
- Pads
- Parking Brake Cable
- Parking Brake Mechanism
- Parking Brake Shoes
- Parking Brake Switches
- Parking Brake Systems
- Pedal Travel Switches
- Pedals
- Power Distribution Center
- POWERMASTER
- Pressure Differential Switches
- Pressure Switches
- Pressure Transducers
- Proportioning Valve
- Pumps
- Relays
- RELUCTOR (Speed) Ring
- Rotors
- Self-Adjusting Systems
- Shoe Hardware
- Shoes
- Sockets
- Speed Sensor (RELUCTOR) Ring
- Speed Sensors (Electronic Wheel And Vehicle)
- Star Wheel
- Steel Brake Lines
- Stoplight Switches
- Stroke Sensor
- Switches
- Tires
- Tone Ring
- Toothed Rings (Tone Wheel)
- Traction Control System (TCS)
- Transfer Tubes
- Vacuum Boosters
- Vacuum Hoses
- Valves
- Wear Indicator
- Wheel Attachment Hardware
- Wheel Bearings, Races And Seals
- Wheel Cylinders
- Wiring Harnesses
- Yaw Rate Sensor
- Brake System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Brake Systems
- Map - Routine Inspection Reference Guide
- Routine Inspection Reference Guide
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Maintenance Overview
- Antifreeze/Coolant
- Visual Inspection
- Radiator Cap Test
- Engine Fan
- Cooling System Power Flush And Refill
- Belts (Except Timing Belts)
- Belt TENSIONER
- Automatic Transmission Fluid
- Automatic Transmission Fluid Exchange & Filter Replacement
- Engine Oil
- Air Filters
- Cabin Air Filter
- Brake Fluid
- Battery
- Battery Cables
- Power Steering
- Power Steering Fluid
- Wiper Blades
- Routine Inspection CHECKSHEET
- Routine Inspection - UICS
- Brake Systems
- Drivetrain And Transmission
- Notes
- Automatic Transmission Fluid
- Clutch Master Cylinders
- Cooler Lines
- Coolers
- Differential Fluid
- Drain Plugs And Gaskets
- Filters And Screens
- Fluids And Lubricants
- Hoses, Lines, And Tubes
- Hydraulic Fluid
- Lubricants
- Manual Transmission Fluid
- Mounts (Engine, Transaxle And Transmission)
- Transfer Case Fluid
- Vacuum Hoses
- Electrical Systems
- Engine Performance And Maintenance
- Notes
- Accessory Belts
- Air Filter Elements
- Air Filter Gaskets
- Air Filter Housings And Gaskets
- Air Pump Belts
- Batteries
- Battery Connectors
- Belt Idler Assemblies (Accessory And Cam Belts)
- Belt TENSIONERS (Accessory And Cam Belt)
- Chemical Engine DECARBONIZATION
- Combustion Chamber Cleaning
- Coolant Recovery Tanks
- Coolant
- Distributor Caps
- Distributor Rotors
- Engine Cooling Systems
- Engine DECARBONIZATION
- Engine Oil Drain Plugs And Gaskets
- Engine Oil Filters And Canisters
- Engine Oil
- Fuel Filters
- Fuel Injector Cleaning
- Fuel Injectors
- Fuel System Cleaning Service
- Hose Clamps
- Hose Connectors
- Hose Couplers
- Hoses And Tubes (Fuel Lines, Radiator, Vacuum, By-Pass, Heater, Recovery Tank And Oil Coolers)
- Ignition Wires (Secondary)
- Intake Cleaning
- O2 Sensors
- PCV Breather Elements
- PCV Valves
- Radiator Caps And Pressurized Expansion Tank Caps
- Spark Plugs
- Thermostats And Housings
- Throttle Body Cleaning
- Timing Belts
- Vacuum Hoses, Tubes And Connections (Non-Metallic)
- Exhaust Systems
- Heating, Ventilation And Air Conditioning Systems
- Steering And Suspension, Wheel Alignment, Wheels And Tires
- Wheel & Tire Supplement
- Reason Code Explanation
- Automotive Terminology & Definitions
- Routine Inspection Reference Guide
- Check Lists
- Computer Relearn Procedures
- Driveline/Axles
- Drive Axle Noise Diagnosis - General Information
- Gear Tooth Contact Patterns - General Information
- Map - Drive Train & Transmission
- Drive Train & Transmission Systems
- Drivetrain And Transmission
- Notes
- Actuators (Electrical)
- Actuators (Vacuum)
- Automatic Transmission / Transaxle Assemblies/CVTS
- Automatic Transmission Fluid
- Axles
- Bearings And Races
- Bell Cranks
- Bell Housings
- Bushings (External)
- Cables (Speedometer)
- Cables (TV, Detent And Shift)
- Carrier Bearings
- Clutch Cables And Cable Housings
- Clutch Discs (Manual Transmissions)
- Clutch Forks
- Clutch Linkages (Mechanical)
- Clutch Master Cylinders
- Clutch Pedals
- Clutch Pivots
- Clutch Pressure Plates
- Clutch Release Bearings
- Clutch Slave Cylinders (Concentric)
- Clutch Slave Cylinders (Conventional Or External)
- Companion Flanges
- Connectors
- Cooler Bypass Valves
- Cooler Lines
- Coolers
- CV Joints
- Differential And Final Drive Assemblies
- Differential Fluid
- Dip Stick Tubes
- Dip Sticks (Fluid Level Indicators)
- Dowel Pins, Guides And Pilot Holes
- Drain Plugs And Gaskets
- Drive Shaft Flanges
- Drive Shafts And Half Shafts
- Dust Boots
- Engine Mounts
- Exciter Rings
- Filler Tubes
- Filters And Screens
- Flanges
- Flex Plates
- Fluid Level Indicators
- Fluids And Lubricants
- Flywheels
- Force Motors
- Gaskets
- Guides
- Half Shafts
- Hoses, Lines, And Tubes
- Housings (Bell, Case, Tail(Extension) And Auxiliary)
- Hydraulic Fluid
- Intermediate Shaft Support Bearings
- Key Interlock Systems
- Limited Slips
- Lines
- Linkages (External)
- Locking Hub Assemblies
- Locking Hub Control Knobs
- Lubricants
- Manual Transmission Fluid
- Manual Transmission/Transaxle Assemblies
- Metal Clad Seals
- METALASTIC Joints
- Modulator Pins
- Modulators
- Mounts (Engine, Transaxle And Transmission)
- Odometer Drives (Mechanical)
- Odometer Heads (Mechanical)
- Oil Pans
- Pans
- Pilot Holes
- Pressure Plates
- Pressure Switches
- Races
- Rubber Joints (METALASTIC)
- Screens
- Seals (Metal Clad)
- Seals
- Selector Interlock Systems
- Sensors
- Servos
- Shift Interlock Systems (Selector And Key Interlock Systems)
- Side Covers
- Slip Yokes
- Solenoids
- Speed Sensors (Electronic Wheel And Vehicle)
- Speedometer- Driven Gear Housing
- Speedometer/Odometer Drives (Mechanical)
- Speedometer/Odometer Heads (Mechanical)
- Speedometers/Odometers (Electronic)
- Switches
- Tone Wheels
- Toothed Rings (Tone Wheel)
- Torque Converters
- Transaxle Mounts
- Transducers (Transmission)
- Transfer Case Assemblies
- Transfer Case Fluid
- Transmission Coolers
- Transmission Mounts
- Transmission Pans
- Transmission Range Indicators (PRNDL)
- Tubes
- Universal Joints (CARDAN Or Cross Type)
- Vacuum Controls
- Vacuum Hoses
- Vacuum Motors
- Vacuum-Operated Switches
- Vehicle Speed Sensors
- Vents
- Vibration Dampers
- Wheel Attachment Hardware
- Wheel Speed Sensors
- Wiring Harnesses And Connectors
- Yokes And Slip Yokes
- Reason Code Explanation
- Automotive Terminology & Definitions
- Trouble Shooting - Clutches - General Information
- DTC Index
- Electrical
- Map - Electrical Systems
- Electrical Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Actuator Motors (Electric)
- Actuator Motors (Vacuum)
- Air Bags
- Alternators And Generators
- Amplifiers
- Antennas
- Batteries
- Battery Cables, Wires And Connectors
- Battery Cables
- Battery Trays And Hold Down Hardware
- Battery Wires
- Belts
- Bulb Sockets
- Bulbs, Sealed Beams And LEDS
- Cd Players
- Cigarette Lighter Assemblies
- Circuit Breakers
- Clutch Switches
- Connectors
- Control Modules
- Cruise Control Brake Switches
- Cruise Control Cables
- Cruise Control Clutch Switches
- Cruise Control Linkages And Cables
- Cruise Control Reservoirs
- Cruise Control Tubes
- Cruise Control Vacuum Dump Release Valves
- Cruise Control Vacuum Hoses, Tubes And
- Cruise Control Vehicle Speed Sensors
- Defoggers
- Defrosters
- Delays
- Dimmers
- Electric Heaters
- Equalizers
- Fuse Blocks
- Fuse Boxes And Blocks
- Fuses, Fusible Links And Circuit Breakers
- Fusible Links
- Gauges
- Generators
- Ground Cables And Straps
- Ground Straps
- Headlight Adjusters
- Heating Elements (Defrosters, Defoggers, Electric Heaters And Seats)
- Horns And Sirens
- Ignition Switches
- Indicator Lights
- Keyless Entry Keypads And Transmitters
- Keyless Entry Transmitters
- LEDS
- Lenses
- Microphones
- Mirrors (ELECTROCHROMATIC And Heated)
- Motors
- Neutral Safety Switches
- Odometers, Speedometers And Tachometers (Cable Driven)
- Odometers
- Power Distribution Center
- Pulleys
- Receivers, Amplifiers, Equalizers And Sub-Woofer Volume Controls
- Relay Boxes
- Relays
- Sealed Beams
- Seat Heaters
- Security Alarm Sensors
- Sirens
- Solenoids
- Speakers And Microphones
- Speedometer And Tachometer Linkages And Cables
- Speedometer Cables
- Speedometers
- Starters
- Sub-Woofer Volume Control
- Switches
- Tachometer Cables
- Tachometers
- Tape Players And Cd Players
- TENSIONERS
- Timers
- Transceivers
- Transducers
- Vacuum Accumulators (Reservoirs)
- Voltage Regulators
- Washer Fluid Level Senders
- Washer Pumps
- Wiper Arms And Blades
- Wiper Blades
- Wiper Hoses And Nozzles
- Wiper Linkages
- Wiper Nozzles
- Wiper Pump Reservoirs
- Wiring Harnesses And Connectors
- Battery, Starting & Charging System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Electrical Systems
- Using lemon2025'S System Wiring Diagrams
- Map - Electrical Systems
- Engine
- Engine Overhaul Procedures - General Information
- * Please Read This First *
- Description
- Engine Identification
- Inspection Procedures
- Cleaning Procedures
- Component Cleaning
- Cylinder Head Replacement
- Cylinder Head Overhaul
- Pistons, Connecting Rods & Bearings
- Crankshaft & Main Bearings
- Camshaft
- Timing Chains & Belts
- Timing Gears
- Oil Pump
- Break-In Procedure
- General Cooling System Service - General Information
- Engine Overhaul Procedures - General Information
- Engine Performance
- Electrostatic Discharge Warning - General Information
- Engine Performance Diagnostic Routine Outline - General Information
- Engine Performance Safety Precautions
- Map - Engine Performance & Maintenance
- Engine Performance And Maintenance (Including Exhaust Systems)
- Engine Performance & Maintenance CHECKSHEET
- Engine Performance And Maintenance
- Notes
- Accelerator Pedal Position Sensor
- Accessory Belts
- Accessory Pulleys
- Air Conditioning Cycling Switches
- Air Conditioning Pressure Sensors
- Air Ducts And Tubes
- Air Filter Elements
- Air Filter Gaskets
- Air Filter Housings And Gaskets
- Air Fuel Ratio Sensors
- Air Injection Control Solenoids
- Air Plenums
- Air Pump Belts
- Air Pumps (Electric Driven)
- Air Tubes
- Aspirator, Check And DECEL Valves
- Baffles
- Ballast Primary Supply Resistor Wires
- Ballast Resistors And Primary Supply Resistors
- Barometric Pressure Sensors
- Batteries
- Battery Cables, Wires And Connectors
- Battery Connectors
- Battery Trays And Hold Down Hardware
- Battery Wires
- Belt Idler Assemblies (Accessory And Cam Belts)
- Belt TENSIONERS (Accessory And Cam Belt)
- Belt-Driven Air Pumps
- Boost Control Mechanism
- Camshaft Position Sensors
- Carburetors And Chokes
- Casting Core Plugs And Expansion Plugs
- Charge Air Coolers ""INTERCOOLERS"" (CAC)
- Check Valves
- Chemical Engine DECARBONIZATION
- Chokes
- Clutch Pedal Position Switches
- Cold Start Injectors
- Combustion Chamber Cleaning
- Connectors
- Coolant Recovery Tanks
- Coolant
- Cooling Fan Motor Modules
- Cooling Fan Motor Relays And Modules
- Cooling Fan Motor Resistors
- Cooling Fan Motor Sensors And Switches
- Cooling Fan Motor Switches
- Cooling Fan Motors
- Crankshaft Position Sensors
- Cylinder Deactivation Solenoid
- Cylinder Head Assemblies
- DECEL Valves
- Deflectors
- Dip Stick Tubes
- Dip Sticks And Tubes
- Distributor Advances And Retarders (Mechanical And Vacuum)
- Distributor Boots And Shields
- Distributor Caps
- Distributor Retarders (Mechanical And Vacuum)
- Distributor Rotors
- Distributor Shields
- Distributors
- Early Fuel Evaporation Valves (Heat Riser Assemblies)
- EGR Coolers
- EGR Exhaust Manifold Passages
- EGR Intake And Exhaust Manifold Passages
- EGR Plates And Coolers
- Electronic Spark Control Modules
- Electronic Transmission Control Devices
- Electronic Transmission Feedback Devices
- Engine Coolant Temperature Sensors
- Engine Cooling Systems
- Engine Covers (Oil Pan, Valve Cover, Timing Cover)
- Engine DECARBONIZATION
- Engine Oil Canisters
- Engine Oil Coolers (External)
- Engine Oil Drain Plugs And Gaskets
- Engine Oil Filters And Canisters
- Engine Oil Gaskets
- Engine Oil Pressure Gauges (Mechanical)
- Engine Oil
- Evaporative Emissions (EVAP) Canister Filters
- Evaporative Emissions (EVAP) Canister Purge Devices
- Evaporative Emissions (EVAP) Canisters
- Evaporative Emissions (EVAP) Feedback Devices
- Exhaust Gas RECIRCULATION Devices
- Exhaust Gas RECIRCULATION Feedback Devices
- Expansion Plugs
- Fan Control Sensor
- Fuel Accumulators And Dampers
- Fuel And Cold Start Injectors
- Fuel Caps
- Fuel Dampers
- Fuel Delivery Check Valves
- Fuel Distributors (BOSCH Cis)
- Fuel Filler Necks And RESTRICTORS
- Fuel Filters
- Fuel Injector Cleaning
- Fuel Injectors
- Fuel Level Senders
- Fuel Pressure Regulators
- Fuel Pumps (In-Tank, External, Electrical Or Mechanical)
- Fuel Rails
- Fuel RESTRICTORS
- Fuel System Cleaning Service
- Fuel Tanks
- Fuel
- Gaskets
- Grommets (Valve Cover)
- Harmonic Dampers
- Heater Control Valves
- Heater Cores
- Hose Clamps
- Hose Connectors
- Hose Couplers
- Hoses And Tube Couplers, Connectors And Clamps
- Hoses And Tubes (Fuel Lines, Radiator, Vacuum, By-Pass, Heater, Recovery Tank And Oil Coolers)
- Housings
- Idle Air Controls
- Idle Speed Control Actuators
- Ignition Boots
- Ignition Coil Towers
- Ignition Coils
- Ignition Control Modules (ICM)
- Ignition Switches
- Ignition Terminals
- Ignition Wires (Secondary)
- Inertia Fuel Shut-Off Switches
- Intake Air Temperature Sensors
- Intake Cleaning
- Intake Manifolds
- In-Tank Fuel Strainers
- INTERCOOLERS
- Knock Sensors
- Liquid Vapor Separators
- Long Block Assemblies
- Manifold Absolute Pressure (Map) Sensors
- Mass Air Flow (MAF) Sensors
- Metal Air Manifolds And Pipes
- Metal Air Pipes
- Mix Control Solenoids
- Motor Mounts
- O2 Sensors
- Oil Pans
- Oil Pressure Sending Units
- Oil Pump Pick-Up Screens
- Oil Pumps
- O-Rings, Gaskets, Seals And Spring Locks
- Park Neutral Position Switches
- PCV Breather Elements
- PCV Orifices
- PCV Valves
- Pick-Up Assemblies (Includes Magnetic, Hall Effect And Optical)
- Power Steering Pressure Sensors
- Powertrain Control Modules (Pcm) And Prom
- Powertrain Control Prom
- Pressurized Expansion Tank Caps
- Radiator / Cooling Fan Blades
- Radiator / Cooling Fan Clutches
- Radiator Caps And Pressurized Expansion Tank Caps
- Radiators
- Roll Over Valves
- Sealing Compounds
- Seals
- Secondary Air Injection System Management Devices
- Sensors
- Short Block Assemblies
- Shrouds, Baffles And Deflectors
- Spark Plugs
- Spring Locks
- Super Chargers
- Switches
- Thermal Vacuum Valves
- Thermostatic Air Door Assemblies
- Thermostats And Housings
- Throttle Bodies
- Throttle Body Cleaning
- Throttle Cables
- Throttle Linkages And Cables
- Throttle Position Sensors
- Throttle Position Switches
- Timing Belt Sprockets
- Timing Belts
- Timing Covers
- Torque Struts
- Transmission Range Switches
- Tube Clamps
- Tube Connectors
- Tube Couplers
- Tubes
- Turbo Chargers
- Vacuum Connections
- Vacuum Hoses, Tubes And Connections (Non-Metallic)
- Vacuum Regulator Solenoids
- Vacuum Tubes
- Valve Covers
- Vehicle Speed Senors
- Volume Air Flow Sensors
- Waste Gate And Boost Control Mechanisms
- Waste Gate Control Solenoids
- Water Pumps (Electric)
- Water Pumps (Non-Electric)
- Wiring Harnesses And Connectors
- Reason Code Explanation
- Automotive Terminology & Definitions
- Parasitic Load Explanation & Test Procedures - General Information
- State Emission Standards - Diesel
- State Emission Standards - Gas
- ALASKA
- ARIZONA
- CALIFORNIA
- Colorado
- CONNECTICUT
- DELAWARE
- District Of COLUMBIA
- GEORGIA
- IDAHO
- ILLINOIS
- INDIANA
- KENTUCKY
- MARYLAND
- MASSACHUSETTS
- MISSOURI
- NEVADA
- New Jersey
- New MEXICO
- New YORK
- North CAROLINA
- OHIO
- OREGON
- PENNSYLVANIA
- RHODE Island
- TENNESSEE
- TEXAS
- UTAH
- VIRGINIA
- WASHINGTON
- WISCONSIN
- U. S. EPA ASM2525 & ASM5015 Start-Up Emission Standards
- U. S. EPA Revised Final ASM Emission Standards (ASM5015 & ASM2525)
- U.S. EPA Im240 Emission Standards
- Waveforms - Injector Pattern Tutorial - General Information
- * Please Read This First *
- Purpose Of This Article
- Is A Lab Scope Necessary?
- The Two Types Of Injector Drivers
- The Two Ways Injector Circuits Are Wired
- Interpreting Injector Waveforms
- Current Waveform Samples
- Notes
- Example #1 - Voltage Controlled Driver
- Example #2 - Voltage Controlled Driver
- Example #3 - Voltage Controlled Driver
- Example #4 - Current Controlled Driver
- Example #5 - Current Controlled Driver
- Example #6 - Current Controlled Driver
- Example #7 - Current Controlled Driver
- Example #8 - Current Controlled Driver
- Voltage Waveform Samples
- Notes
- Example #1 - Voltage Controlled Driver
- Example #2 - Voltage Controlled Driver
- Example #3 - Voltage Controlled Driver
- Example #4 - Current Controlled Driver
- Example #5 - Current Controlled Driver
- Example #6 - Current Controlled Driver
- Example #7 - Current Controlled Driver
- Example #8 - Current Controlled Driver
- Map - Exhaust Systems
- Exhaust Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Catalytic Converters
- Exhaust And Tail Pipes
- Exhaust Connections
- Hangers
- Heat Risers (Mechanical EFE Devices)
- Heat Shields
- Manifolds (Cast And Tube Type)
- Mechanical EFE Devices
- Muffler Valve
- Mufflers And Resonators
- Reason Code Explanation
- Exhaust Systems
- Heating, Ventilation & A/C (HVAC)
- Map - Heating, Ventilation, & Air Conditioning
- Heating, Ventilation & Air Conditioning Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Accumulators
- Actuators (Electrical)
- Actuators (Vacuum)
- Air Conditioning Fittings
- Air Conditioning Hoses
- Air Conditioning Metal Lines
- Air Control Doors
- Air Dams (External)
- Air Distribution System
- Belts
- Blend Doors
- Blower Fans (Blower Wheel Or Squirrel Cage)
- Blower Motors
- Blower Resistors
- Blower Switches
- Cabin Air Filters
- Circuit Breakers
- Compressor Clutch Assemblies
- Compressors
- Condenser Air Seals
- Condenser Fan Motors
- Condensers
- Connectors
- Control Cables
- Control Heads (Function Selectors)
- Control Linkages
- Control Modules
- Coolant
- Cooling Fan Blades
- Cooling Fan Clutches
- Cooling Fan Motors
- Evaporator Drain Tubes
- Evaporator Filters
- Evaporator Pressure Regulators (EPRS)
- Evaporators
- Expansion Valves
- Function Selectors
- Fuses, Fusible Links And Circuit Breakers
- Fusible Links
- Gaskets
- Heater Cases
- Heater Control Valves
- Heater Cores
- Heater Hoses
- High Pressure Relief Valves (HPRV)
- Idlers
- In-Line Filters
- Metal Fittings
- Metal Lines
- Mix And Air Control Doors (Blend Doors)
- ORIFACE Tubes
- O-Rings
- Pilot-Operated Absolutes (POAS)
- Plenums
- Pressure Control Valves
- Pressure Sensors
- Pulleys
- Radiators
- Receiver-DRIERS
- Refrigerant Oil
- Refrigerant
- Relays
- Seals
- Service Ports
- Spring Lock Couplings
- Suction Throttling Valves (STVS)
- Switches (Electrical)
- TENSIONERS
- Thermistors And Pressure Sensors
- Thermostats And Housings
- Vacuum Hoses And Tubes
- Vacuum Reservoirs
- Vacuum Tubes
- Valves In Receiver (VIRS)
- Water Pumps (Electric Auxiliary)
- Wiring Harnesses And Connectors
- Heating, Ventilation & Air Conditioning System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Heating, Ventilation & Air Conditioning Systems
- Map - Heating, Ventilation, & Air Conditioning
- Identification
- Metric Conversions
- OEM General Information
- How To Use The Engine Performance Section
- Maintenance Reminder Light (Reset Procedures)
- Air Bag Restraints & SRS Components - Inspection & Replacement Tables
- Specifications Index
- Steering
- Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
- Steering & Suspension Systems
- Wheel And Tire
- Steering & Suspension CHECKSHEET
- Wheels & Tires CHECKSHEET
- Steering And Suspension, Wheel Alignment, Wheels And Tires
- Notes
- Active Handling
- Active Suspension Control Modules
- Active Variable Ratio Steering
- Active Yaw Control
- Adaptive Cruise Control
- Advance TRAC
- Air Bags
- Air Ride Control Modules
- Air Ride Suspension Torsion Springs (Counter Balancing)
- Air Ride Suspension
- Air Ride Tubes
- Air Shocks And Air Struts
- Air Spring Valves
- Air Springs
- Air Suspension Control Valves
- Air Suspension DRIERS
- Axle Acceleration Sensor
- Ball Joints
- Body Acceleration Sensor
- Bushings
- Center Links
- Compressors
- Continuous Damping Control
- Control Arm Shafts
- Control Arms
- Control Modules
- Distance Regulation Control Module
- Distance Regulation Sensor
- Drag Links
- Dynamic Stability Control
- Dynamic Stability Traction Control
- Electronic Ride Control Shocks And Struts
- Electronic Stability Control
- Electronic Suspension System
- Flex Couplers
- Gaskets
- Height Sensors
- Hydraulic Hoses
- Hydraulic Power Steering Pumps
- Hydraulic Suspension Hoses
- Hydraulic Suspension Pumps
- Idler Arms
- Intermediate Shaft U-Joints
- King Pins
- Modules
- Pitman Arms
- Power Steering Belts
- Power Steering Coolers
- Power Steering Fluid
- Power Steering Hoses
- Power Steering Lines (Steel)
- Power Steering Pumps - Electric
- Power Steering Pumps
- Radar Sensor
- Radius Arms
- Relay Rods
- Relays
- Sensors
- Shock Absorbers, Strut Cartridges And Strut Assemblies
- Spindles
- Springs, Coil, Leaf And Torsion Bars
- STABILITRAC
- Stability Management System
- Steering Angle Sensor
- Steering Arms
- Steering Couplers
- Steering Dampers
- Steering Gears (Except Rack And Pinion)
- Steering Gears, Rack And Pinion
- Steering Knuckles
- Strike Out Bumpers
- Strut Bearing Plate Assemblies
- Strut Rods
- Suspension Pumps (Hydraulic)
- Sway Bar Links
- Sway Bar Mounting Bushings
- Sway Bars
- Switches
- Tie Rod Ends (Inner And Outer)
- Tire Pressure Monitoring System
- Tire Pressure Sensors
- Tires
- Torque Sensor
- Torsion Springs
- Track Bar Bushings
- Track Bars
- Trailing Arm Bushings
- Trailing Arms
- Valve Stems
- Vehicle Dynamics Control
- Vehicle Speed Sensor
- Vehicle Stability Assist
- Vehicle Stability/Skid Control
- Warning Lamps
- Wheel Alignment
- Wheel Attachment Hardware
- Wheel Bearings, Races And Seals
- Wheels (Rims)
- Wiring Harnesses And Connectors
- Reason Code Explanation
- Automotive Terminology & Definitions
- Wheel Alignment Theory & Operation - General Information
- Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
- Traction Control Disable Procedures
- Trouble Shooting - Manual Transmission - General Information
- Heating, Ventilation & A/C (HVAC)
- General Servicing
- A/C Compressor Refrigerant Oil Checking
- A/C Compressor Servicing
- A/C System General Servicing
- A/C System Specifications
- Cabin Air Filter (Special Applications) - General Information
- HVAC Control Systems
- A/C System Specifications - Automatic
- A/C-Heater System - Automatic
- A/C-Heater System - Manual
- Torque Specifications
- Description
- Operation
- Trouble Shooting
- Testing
- Removal & Installation
- Notes
- Accumulator
- A/C-Heater Unit
- Blower Motor
- Blower Motor Resistor
- Compressor
- Condenser
- Control Panel
- Evaporator
- Heater Core
- Heat/Defrost Door
- Heat/Defrost Door Actuator
- High Pressure Cut-Out Switch
- Instrument Panel
- Panel/Defrost Door
- Panel/Defrost Door Actuator
- Recirculating Air Door
- Recirculating Air Door Actuator
- Temperature Blend (Air Mix) Door
- Temperature Blend (Air Mix) Door Motor
- Vacuum Reservoir
- Wiring Diagram
- HVAC Systems - Basic Trouble Shooting - Manual
- Vacuum Control System Diagnosis
- Actuator Calibration/Diagnostics & Cooldown Test - Fwd Vans
- Notes
- Actuator Calibration
- Diagnostics
- Cooldown Test
- Calibration/Cooldown Led Display Codes
- Calibration/Diagnostics Test Entry
- Cooldown Test Entry
- Calibration/Diagnostics And Cooldown Abort
- EEPROM Data
- Actuator Calibration & Diagnostics
- Blend/Passenger Actuator Background
- Driver Actuator Background
- Manual A/C (HVAC) - Mode Door Operation
- Mode Actuator Background
- Fail Codes/Level Display
- Temperature And Mode Potentiometer Diagnostics
- Fin Sensor Temperature Diagnostics
- Trouble Shooting
- General Servicing
- Maintenance
- Procedures
- Maintenance Information
- Model Identification
- Maintenance Service Information
- Service Point Locations
- Additional Service Information
- Identification Label Locations
- Service Labor Times
- Wheel & Tire Specifications
- Battery Specifications
- Cautions & Warnings
- Supplemental Restraint System (SRS) Air Bag System
- Anti-Lock Brake System (Abs)
- Battery Warning
- Replacing Blown Fuses
- Brake Pad Wear Indicator
- Catalytic Converter
- Coolant (Propylene-Glycol Formulations)
- Electrostatic Discharge Sensitive (ESD) Parts
- Engine Oil
- Fuel System Service
- Halogen Bulbs
- Radiator Cap
- Radiator Fan
- Axle Lubricants
- TRAC-LOK Differentials (4WD)
- Command-TRAC (4WD)
- Front And Rear Differentials (4WD)
- Transfer Case
- Warranty Information
- Notes
- Basic New Car Warranty
- Powertrain Protection Limited Warranty
- Customer One Care Warranty
- Anti-Corrosion Perforation Warranty
- Emission Defect Warranty (Except CALIFORNIA)
- Emission Performance Warranty (Except CALIFORNIA)
- Emission Performance Warranty (CALIFORNIA)
- Emission Defects Warranty (CALIFORNIA)
- Roadside Assistance
- Towing
- Fuses & Circuit Breakers
- Maintenance Reminder Light (Reset Procedures)
- Maintenance Information
- Procedures
- Restraints
- Air Bag, SRS
- Air Bag Restraint System
- Description & Operation
- Servicing
- Post-Collision Inspection
- Adjustments
- Disposal Procedures
- Removal & Installation
- Testing - System Operation Check
- Service Precautions
- Disabling & Activating Air Bag System
- Wire Repair
- Torque Specifications
- Diagnosis
- Testing - Diagnostic Charts
- Notes
- Test 1A - Testing System Function
- Test 2A - Blank DRB Message Screen
- Test 2B - Blank DRB Message Screen
- Test 3A - No Response Message On DRB
- Test 3B - No Response Message On DRB
- Test 3C - No Response Message On DRB
- Test 4A - Air Bag Module Codes
- Test 5A - Two Front Sensors Open
- Test 6A - Initiator (Squib) Open
- Test 7A - Initiator (Squib) Short
- Test 8A - Front Sensor Short
- Test 9A - One Front Sensor Open
- Test 9B - One Front Sensor Open
- Test 10A - Ignition 2 (Run Only) Low
- Test 10B - Ignition 2 (Run Only) Low
- Test 11A - Warning Lamp Open
- Test 11B - Warning Lamp Short
- Test 12A - Ignition 1 (Run/Start) Low
- Test 12B - Ignition 1 (Run/Start) Low
- Test 13A - Air Bag System Diagnostic Module (ASDM) Replacement
- Test VER-1 - Verification Test
- Wiring Diagram
- Post-Collision Air Bag Safety Inspection
- Air Bag Restraint System
- Restraints Control Systems
- Seat Belts
- Air Bag, SRS
- Steering
- Manual Steering
- Power Steering
- Steering Column
- Suspension
- Front Suspension
- Suspension - Front
- Rear Suspension
- Wheel Alignment
- Front Suspension
- Transmission
- Automatic Trans
- Diagnosis - 42RE (W/TCM)
- Application & Identification
- Introduction
- Description
- Operation
- Symptom Trouble Shooting
- Self-Diagnostic System
- Diagnostic Trouble Code Tests
- Notes
- Test 1A - Entering Diagnostic Test
- Test 2A - Retrieving Diagnostic Trouble Codes
- Test 3A - Verification Test
- Test 4A - No Engine Speed Sensor Signal (DTC 11)
- Test 5A - No Output Shaft Sensor Signal (DTC 12)
- Test 6A - No Vehicle Speed Sensor Signal (DTC 13)
- Test 7A - Governor Pressure Sensor Signal (DTC 14)
- Test 7B - Governor Pressure Sensor Signal
- Test 8A - Throttle Position Signal (DTC 15)
- Test 9A - Transmission Fluid Temperature Sensor (DTC 16)
- Test 9B - Transmission Fluid Temperature Sensor
- Test 10A - Overdrive Off Switch Circuit (DTC 17)
- Test 11A - System/Stand-By Voltage Out Of Limits
- Test 12A - Governor Pressure Solenoid Circuit (DTC 21)
- Test 13A - 3-4 Solenoid Circuit (DTC 22)
- Test 14A - Torque Converter Clutch Circuit (DTC 23)
- Test 15A - Overdrive Off Light Circuit (DTC 24)
- Test 15B - Overdrive Off Light Circuit
- Test 15C - Overdrive Off Light Circuit
- Test 16A - Governor Pressure Sensor Offset Drift (DTC 26)
- Test 17A - 12-Volt Supply
- Test 18A - No Response
- Test 19A - Stored Diagnostic Trouble Codes
- Removal & Installation
- Torque Specifications
- Connector Identification
- Wiring Diagram
- Diagnosis - 42RE & 44RE & 46RE & 47RE Automatic Transmission (W/O TCM)
- Model Identification
- Description
- Operation
- Trouble Shooting
- Self-Diagnostic System
- Diagnostic Tests
- Notes
- Test TC-12A - Torque Converter Clutch (TCC) Solenoid/Transmission Relay Circuit (DTC 37/P0743)
- Test TC-12B - Torque Converter Clutch (TCC) Solenoid/Transmission Relay Circuit
- Test TC-12C - Torque Converter Clutch (TCC) Solenoid/Transmission Relay Circuit
- Test TC-12D - Torque Converter Clutch (TCC) Solenoid/Transmission Relay Circuit
- Test TC-12E - Torque Converter Clutch (TCC) Solenoid/Transmission Relay Circuit
- Test TC-50A - Transmission 3-4 Solenoid/Transmission Relay Circuits (DTC 45/P0753)
- Test TC-50B - Transmission 3-4 Solenoid/Transmission Relay Circuits
- Test TC-50C - Transmission 3-4 Solenoid/Transmission Relay Circuits
- Test TC-50D - Transmission 3-4 Solenoid/Transmission Relay Circuits
- Test TC-50E - Transmission 3-4 Solenoid/Transmission Relay Circuits
- Test TC-74A - Transmission Temperature Sensor Voltage Too Low DTC 37/P0712)
- Test TC-75A - Transmission Temperature Sensor Voltage Too High (DTC 37/P0713)
- Test TC-114A - Park/Neutral (P/N) Switch Stuck In Park Or In Gear (DTC 37/P1899)
- Test TC-141A - Governor Pressure Not Equal To Target @ 15-20 Psi (DTC 45/P1756)
- Test TC-141B - Governor Pressure Not Equal To Target @ 15-20 Psi
- Test TC-141C - Governor Pressure Not Equal To Target @ 15-20 Psi
- Test TC-141D - Governor Pressure Not Equal To Target @ 15-20 Psi
- Test TC-141E - Governor Pressure Not Equal To Target @ 15-20 Psi
- Test TC-141F - Governor Pressure Not Equal To Target @ 15-20 Psi
- Test TC-142A - Governor Pressure Above 3 Psi In Gear At 0 Mph DTC 45/P1757)
- Test TC-142B - Governor Pressure Above 3 Psi In Gear At 0 Mph
- Test TC-142C - Governor Pressure Above 3 Psi In Gear At 0 Mph
- Test TC-142D - Governor Pressure Above 3 Psi In Gear At 0 Mph
- Test TC-142E - Governor Pressure Above 3 Psi In Gear At 0 Mph
- Test TC-142F - Governor Pressure Above 3 Psi In Gear At 0 Mph
- Test TC-148A - Torque Converter Clutch, No Rpm Drop At Lockup DTC 37/P0740)
- Test TC-164A - Transmission Temperature Sensor No Rise After Start (DTC 37/P0711)
- Test TC-165A - 3-4 Shift Solenoid No Rpm Drop 3-4 Shift DTC 45/0783)
- Test TC-167A - Governor Pressure Sensor Volts Too Low DTC 45/P1764)
- Test TC-167B - Governor Pressure Sensor Volts Too Low
- Test TC-167C - Governor Pressure Sensor Volts Too Low
- Test TC-168A - Governor Pressure Sensor Volts Too High DTC 45/P1763)
- Test TC-168B - Governor Pressure Sensor Volts Too High
- Test TC-168C - Governor Pressure Sensor Volts Too Low
- Test TC-169A - Governor Pressure Sensor Offset Volts Too Low Or Too High (DTC 45/P1762)
- Test TC-171A - Governor Pressure Solenoid/Trans Relay Circuits (DTC 45/P0748)
- Test TC-171B - Governor Pressure Solenoid/Trans Relay Circuits
- Test TC-171C - Governor Pressure Solenoid/Trans Relay Circuits
- Test TC-171D - Governor Pressure Solenoid Circuit
- Test TC-173A - Trans 12-Volt Supply Relay Control Circuit DTC 45/P1765)
- Test TC-188A - O/D Switch Low Rationality (DTC 45)
- Verification Test VER-1A - Road Test Verification
- Removal & Installation
- Connector Identification
- Wiring Diagrams
- Diagnosis - 42RH, 46RH & 47RH
- Overhaul - 42RE, 42RH & 44RE Automatic Transmission
- Application
- Identification
- Description & Operation
- Lubrication & Adjustments
- On-Vehicle Service
- Trouble Shooting
- Notes
- Transmission Symptom Diagnosis
- Notes
- Buzzing Noise
- Delayed Engagement From Neutral To Drive Or Reverse
- Drags Or Locks Up
- Fluid Blows Out Filler Tube
- Growling, Grating Or Scraping Noise
- Harsh Engagement From Neutral To Drive Or Reverse
- No Drive Range In Any Position, (Reverse Is Okay)
- No Kickdown Or Normal Downshift
- No Low Gear (Moves In 2nd & 3rd Gears Only)
- No Reverse
- Shifts Delayed Or Erratic
- Slips In All Forward Gears
- Slips In Low & Drive But Not In 1st Gear
- Slips In Reverse Only
- Poor Acceleration Or, Excessive Throttle To Maintain Speed
- Torque Converter Locks Up In 2nd &/Or 3rd Gear
- Transmission Overheats
- Vehicle Moves In Neutral
- Vehicle Moves In 2nd Or 3rd Gear & Abruptly Downshifts To Low
- Vehicle Will Not Move In All Gears
- Will Not Upshift From Low Gear
- 1st & Reverse Gears Only
- Overdrive Unit Symptom Diagnosis
- Testing
- Road Test
- Hydraulic Pressure Test
- Test Preparation
- Pressure Test With Transmission In "1" (Low Gear)
- Pressure Test With Transmission In "2" (2nd Gear)
- Pressure Test With Transmission In "D" (Drive Gear)
- Pressure Test With Transmission In "R" (Reverse Gear)
- Pressure Test With Transmission In Overdrive (4th Gear)
- Transmission Governor Pressure
- Hydraulic Pressure Test Results
- Torque Converter Stall Speed Test
- Clutch & Servo Air Pressure Test
- Torque Converter Fluid Leakage Test
- Transmission Case Pressure Test
- Hydraulic Pressure Adjustments
- Removal & Installation
- Torque Converter
- Transmission Disassembly
- Transmission Component Disassembly & Reassembly
- Transmission Reassembly
- Overdrive Unit Disassembly
- Overdrive Unit Component Disassembly & Reassembly
- Overdrive Unit Reassembly
- Overdrive Unit Adjustments
- Torque Specifications
- Transmission Specifications
- Overhaul - 46 & 47 Automatic Transmission Series
- Application
- Identification
- Description & Operation
- Lubrication & Adjustments
- On-Vehicle Service
- Trouble Shooting
- Notes
- Transmission Symptom Diagnosis
- Notes
- Buzzing Noise
- Delayed Engagement From Neutral To Drive Or Reverse
- Drags Or Locks Up
- Fluid Blows Out Filler Tube
- Growling, Grating Or Scraping Noise
- Harsh Engagement From Neutral To Drive Or Reverse
- No Forward Gear In Any Position, (Reverse Is Okay)
- No Kickdown Or Normal Downshift
- No Low Gear (Moves In 2nd & 3rd Gears Only)
- No Reverse
- Shifts Delayed Or Erratic
- Slips In All Forward Gears
- Slips In Low Gear In Drive But Not In Low Gear ("1" Position)
- Slips In Reverse Only
- Sluggish Acceleration Or, Excess Throttle To Maintain Speed
- Torque Converter Locks Up In 2nd And/Or 3rd Gear
- Transmission Overheats
- Vehicle Moves In Neutral
- Vehicle Moves In 2nd Or 3rd Gear &, Abruptly Downshifts To
- Vehicle Will Not Move In Any Gear
- Will Not Upshift From Low Gear
- 1st & Reverse Gears Only
- Overdrive Unit Symptom Diagnosis
- Electronic Testing
- Testing
- Road Test
- Torque Converter Stall Speed Test
- Hydraulic Pressure Test
- Hydraulic Pressure Test Preparation
- Pressure Test With Transmission In "1" (1st Gear)
- Pressure Test With Transmission In "2" (2nd Gear)
- Pressure Test With Transmission In "D" (Drive Gear)
- Pressure Test With Transmission In "R" (Reverse Gear)
- Pressure Test With Transmission In Overdrive (4th Gear)
- Transmission Governor Pressure
- Hydraulic Pressure Test Result Indications
- Clutch & Servo Air Pressure Test
- Torque Converter Fluid Leakage Test
- Transmission Case Pressure Test
- Hydraulic Pressure Adjustments
- Removal & Installation
- Torque Converter
- Transmission Disassembly
- Transmission Component Disassembly & Reassembly
- Transmission Reassembly
- Overdrive Unit Disassembly
- Overdrive Unit Component Disassembly & Reassembly
- Overdrive Unit Adjustments
- Torque Specifications
- Transmission Specifications
- Removal & Installation - A/T
- Servicing - A/T
- Diagnosis - 42RE (W/TCM)
- Transfer Case
- Overhaul - NV242 Transfer Case
- Overhaul - NV249 Transfer Case
- Automatic Trans
- External Pages