3.7L/3.9/5.2L EFC System

• Description
• Operation
  • Notes
  • Fuel Control
  • Electronic Throttle Control
  • Spark Control
    • Notes
    • Start Mode
    • Run Mode
    • Advance From Vacuum
    • Advance From Speed
  • Data Sensors
    • Notes
    • Magnetic Pick-Up Assembly
    • Coolant Temperature Sensor/Switch
    • Vacuum Transducer
    • Carburetor Switch
    • Oxygen (O2) Sensor
    • Charge Temperature Switch
    • Coolant Temperature/Charge Temperature Sensor
  • Spark Control Computer
    • Notes
    • Open Loop
    • Closed Loop
  • Electronic Exhaust Gas RECIRCULATION (EGR)
  • Electronic Air Switching
  • Catalytic Converter
• Removal & Installation
  • Spark Control Computer
    • Removal
    • Installation
  • Carburetor Switch
    • Removal & Installation
  • Oxygen Sensor
    • Removal & Installation
• Testing & Diagnosis
  • Description
  • Entering On-Board Diagnosis
  • Fault Codes
    • Notes
    • Code 00
    • Code 88
    • Code 55
    • Code 11
    • Code 12
    • Code 13
    • Code 14
    • Code 17
    • Code 18
    • Code 21
    • Code 22
    • Code 23
    • Code 24
    • Code 25
    • Code 26
    • Code 28
    • Code 31
    • Code 32
    • Code 33
  • Actuator Test Codes
    • Notes
    • Code 91
    • Code 92
    • Code 93
    • Code 97
    • Code 98
  • Sensor Read Test Codes
    • Notes
    • Code 91
    • Code 92
    • Code 93
    • Code 96
  • Switch Test Codes
    • Notes
    • Code 00
    • Code 88
• No Start (NS) Tests
  • NS1 - Checking For Spark At Plug Wires
  • NS2 - Checking For Fuel In Carburetor
  • NS3 - Fuel Fouled Spark Plugs Check
  • NS4 - Engine Timing Check
  • NS5 - Ignition Coil Spark Check
  • NS6A - Checking Primary Ignition System For Fault Codes
  • NS6B - Ignition Coil Primary Windings Resistance Check
  • NS6C - Distributor Dual Pick-Up Coil Resistance Check
  • NS6D - Distributor Single Pick-Up Coil Resistance Check
    • 3.7L & 5.2L Engines
  • NS6E - Distributor Pick-Up Coil Wiring Resistance Check
    • 3.7L & 5.2L Engines
  • NS6F - Voltage Supply To Computer Check
    • 3.7L And 5.2L Engines
  • NS6D - (3.9L DAKOTA Only) Testing Distributor Pickup Circuit
  • NS6E - (3.9L DAKOTA Only) Checking Voltage Supply To
  • NS6F - (3.9L DAKOTA Only) Checking Distributor Pickup Power Circuit
  • NS6G - (3.9L DAKOTA Only) Testing Distributor Pickup Ground Circuit
  • NS6H - (3.9L DAKOTA Only) Testing Distributor Pickup Signal Circuit To Computer
  • NS6I - (3.9L DAKOTA Only) Checking Voltage Supply To Computer
  • NS6J - (3.9L DAKOTA Only) Checking Computer Ground Circuit
  • NS7 - Fuel Pump Pressure Check
• DRIVEABILITY (Dr) Tests
  • Dr1A - Checking System For Fault Codes
  • Code-To-Test Menu
  • Dr1B - Checking Computer Controlled Components
    • Notes
    • Test Code 91
    • Test Code 92
    • Test Code 93
    • Test Code 97
    • Test Code 98
  • Dr1C - Checking Voltage Supply To Trans. Unlock Solenoid
  • Dr1D - Intermittent Failures
  • Dr2 - Code 11 - Oxygen Sensor Circuit
  • Dr3 - Code 12 - Transmission Unlock Relay Circuit
  • Dr4 - Code 13 - Air Switching Solenoid Circuit
  • Dr5 Code 17 - Throttle CNTRL Solenoid CKT (3.9L DAKOTA Only)
  • Dr5 - Code 17 - Throttle CNTRL Solenoid CKT (Exc 3.9L DAKOTA)
  • Dr6 - Code 18 - EGR Or Canister Purge Solenoid Circuit
  • Dr7A - Code 22 - Lean 02 Feedback System Operation Check
    • 3.9L Dakota Only
  • Dr7 - Code 22 - Oxygen Feedback System Operation Check
    • Notes
    • Except 3.9L Dakota
  • Dr7B - Code 22 - Rich Oxygen Feedback System Operation Check
    • 3.9L Dakota Only
  • Dr8 - Code 25 - Charge Temperature Switch Circuit
  • Dr9 - Code 26 - Engine Temperature Sensor Circuit
  • Dr10 - Code 28 - Speed Sensor Circuit
  • Dr11 - Checking For No Code 88
  • Dr12 - Fast Idle Cam Linkage & Choke Check
  • Dr13 - Choke Vacuum Kick Check
  • Dr14 - Heated Air Intake System Check
  • Dr15 - Engine Coolant Sensor Calibration Check
    • Fed. 3.7L With A/T & Fed. 5.2L
  • Dr16 - EGR Or Canister Purge CVSCC Valve Check
  • Dr17 - Choke Position With Engine Running Check
  • Dr18 - Fuel Fouled Spark Plugs Check
  • Dr19 - Carburetor Switch Check
  • Dr20 - Engine Temperature Sensor Calibration Check
  • Dr21 - Choke Position Check
  • Dr22 - EGR System Check (DAKOTA Only)
  • Dr22 - EGR System Check (Except DAKOTA)
  • Dr23 - Canister Purge System CVSCC Valve Check (Exc DAKOTA)
  • Dr24 - Air Injection System Check
  • Dr25 - Heated Air Intake System Check
  • Dr26 - Bowl Vent System Check (DAKOTA Only)
  • Dr26 - Bowl Vent System Check (Except DAKOTA)
  • Dr27 - Start-To-Run Pick-Up Coil Transfer Circuit Check
  • Dr28 - Idle Control Solenoid Hot Restart Check
  • Dr29 - Secondary Ignition System Check
  • Dr30 - Basic Ignition Timing Check
  • Dr31 - Idle Rpm Check
  • Dr32 - System & Component Checking
• Wiring Diagrams