3.8L PFI Tests W/Codes

• Model Identification
• Description
• Pre-Test Conditions
• Diagnostic System Operation
  • Notes
  • "Hard Failures"
  • "Intermittent Failures"
• Basic Diagnostic Procedure
• Entering Or Exiting Diagnostic Mode (Non-Scan)
• Reading Trouble Codes
• ECM Trouble Code Definitions
• Trouble Code Determination (Hard Or Intermittent)
• Clearing Trouble Codes
• Diagnostic Materials
  • Notes
  • Diagnostic Charts
  • Diagnostic Aids
• Field Service Mode Check (Fuel Injected Models)
• Special Diagnostic Tools
• Scan Tester Usage
• Scan Tester - Test Data Parameters
• Diagnostic Circuit Check (All Engines)
• "Scan" Diagnostic Circuit Check
• Chart A1 - No "Service Engine Soon" Light (All Engines)
• Chart A2 - No Code 12 "SERV Eng Soon" Light Always On
• Chart A3 - Cranks/Won't Run (W/ Type I Ignition)
  • Engine Cranks But Won't Run (3.8L VIN 3 & VIN B, Type I Ignition System)
  • Ignition System Identification
  • Circuit Description For Steps 1-6 (1 Of 3 - Type I Ignition)
  • Circuit Description For Steps 7-11 (2 Of 3 - Type I Ignition)
  • CKT Description For Steps 12-14 (3 Of 3 - Type I Ignition)
• Chart A3 - Cranks/Won't Run (W/ Type II Ignition)
  • Engine Cranks But Won't Run (VINS 3 & B W/ Type II Ignition System)
  • Ignition System Identification
  • CKT Description For Steps 1-6 (1 Of 3 - Type II Ignition)
  • CKT Description For Steps 7-11 (2 Of 3 - Type II Ignition)
  • CKT Description For Steps 12-14 (3 Of 3 - Type II Ignition)
• Chart A5 - Engine Cranks But Won't Run
• Chart A6 - Engine Cranks But Won't Run
• Chart A7 - Fuel System Diagnosis
• Chart A8 - Fuel Injection (All Engines)
• Code 13 - Open Oxygen Sensor Circuit (All Engines)
• Code 14 - Cts Signal Voltage Low
  • Coolant Temperature Sensor (Cts) Signal Voltage Low
• Code 15 - Coolant Sensor Signal Voltage High
  • Coolant Temperature Sensor (Cts) Signal Voltage High
• Code 21 - TPS Signal Voltage High
• Code 22 - TPS Signal Voltage Low
• Code 23 - Mat Sensor Signal Voltage High
• Code 24 - Vehicle Speed Sensor
• Code 25 - Mat Sensor Signal Voltage Low
• Code 32 - EGR Vacuum Control
  • Exhaust Gas RECIRCULATION (EGR) Vacuum Control (All Engines)
• Code 33 - Mass Air Flow (MAF) Sensor
• Code 34 - Mass Air Flow (MAF) Sensor
• Code 41 - C(3)I Ignition Cam Sensor Signal (3.8L)
• Code 42 - C(3)I Ignition
• Code 43 - Electronic Spark Control (ESC)
• Code 44 - Lean Exhaust Indication
• Code 45 - Rich Exhaust Indication
• Codes 51-53 - Prom, CALPAK & ECM
• Chart C1 - ECM Replacement Check Chart
• Chart C1A - Park Neutral Switch
• Chart C1E - Power Steering Pressure Switch Check
• Chart C2C - Idle Air Control
• Chart C3 - Canister Purge Check
• Chart C4E (3.8L Type I Ignition)
• Chart C4F1 - Misfires At Idle (3.8L VINS 3 & B)
  • Test Description For Steps 1-5 (3.8L VINS 3 & B)
• Chart C4F2 - Misfires Under Load
  • Test Description For Steps 1-4
• Chart C5 - Electronic Spark Control (ESC) Test
  • Electronic Spark Control (ESC) Test (All Engines)
• Chart C7 - Exhaust Gas RECIRCULATION
• Charts C8A & C8B - TCC
  • Chart C8A - Transmission/Transaxle Converter Clutch (TCC), (1 Of 2)
  • Chart C8B - Transmission/Transaxle Converter Clutch TCC), (2 Of 2)
• Chart C10A - A/C Clutch Control
• Chart C10B - A/C Clutch Control
• Chart C10C - A/C Constant Run Relay Check
• Chart C12A - 1-SPD Coolant Fan Check (W/O A/C)
  • Coolant Fan Check (1-Speed Fan) Without A/C
• Chart C12B - 1-Speed Coolant Fan Check (W/O A/C)
  • Coolant Fan Check (1-Speed Fan) Without A/C
• Chart C12C - 1-Speed Coolant Fan Delay Relay (W/O A/C)
  • Coolant Fan Delay Relay Check (1-Speed Fan) Without A/C
• Chart C12D - 2-Speed Coolant Fan (W/ Or W/O A/C)
• Chart C12E - 2-Speed Fan Always On (3.8 W/ Or W/O A/C)
• Chart C12F - 2-Speed Fan, No Low Speed (W/ Or W/O A/C)
• Chart C12H - Coolant Fan Check W/ A/C & Hd Cooling
• CHART C-12I - COOLANT FAN CHECK W/ A/C & HD COOLING (Cont.)
• Chart C12J - Coolant Fan Timer Check (W/ A/C & Hd Cooling)
• Chart C12L - Coolant Fan Check (2 Speed Fan)
• Chart C12M, Fan On At All Times (Two Speed Fan)
• Chart C12N - No Low Speed Fan (2 Speed Fan)
• Component Locations
• ECM Terminal Id
• Wiring Diagrams