Section 14 (Engine Controls - Self-Diagnostics)
WARNING: This page is about a different car, the 2003 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Fuel System Pressure Release
- Programming
- Drive Cycles
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- Battery Temperature Sensor Location
- BCM Location
- BRAKELIGHT Switch Location
- CKP Sensor Location (4.0L)
- CKP Sensor Location (4.7L)
- CMP Sensor Location (4.0L)
- CMP Sensor Location (4.7L)
- Coil Capacitor/Auto Shutdown Relay Location (4.7L)
- Coil Rail Location (4.0L)
- Cooling Fan Relay Location
- Data Link Connector & Junction Block Locations
- ECT Sensor Location (4.0L)
- ECT & Map Sensors Locations (4.7L)
- EVAP Purge Solenoid, EVAP Canister & EVAP System Test Port Locations
- Fuel Delivery Components At Fuel Tank Location
- Fuel Filter/Pressure Regulator Location
- Fuel Injectors Locations (4.0L)
- Fuel Injectors Locations (4.7L)
- IAC Motor & IAT, Map & TP Sensors Location (4.0L)
- IAC Motor, IAT Sensor & TP Sensor Location (4.7L)
- Knock Sensors Location (4.7L High-Output)
- Leak Detection Pump Location
- Oil Pressure Sensor Location (4.0L)
- Oil Pressure Sensor Location (4.7L)
- O2 Sensors Location (4.0L)
- O2 Sensors Location (4.7L)
- Park/Neutral Switch Location (4.0L)
- PCV Breathers, Hoses & Tubes Location (4.7L)
- Power Distribution Center Location
- Powertrain Control Module Location
- Skim Location
- TCM Location (4.7L)
- Transmission Solenoid/TRS Assembly Location (4.7L)
- Connector Identification
- A/C Clutch Harness Connector End View
- A/C Pressure Transducer Harness Connector End View
- Battery Temperature Sensor Harness Connector End View
- Brake Lamp Switch Harness Connector End View
- Automatic Shutdown Relay/Coil Capacitor Connector ENDVIEW (4.0L)
- Automatic Shutdown Relay/Coil Capacitor Connector ENDVIEW (4.7L)
- CKP Sensor Harness Connector End View
- CLOCKSPRING Connector End View
- CMP Sensor Harness Connector End View
- Coil On Plug Connector End View (4.7L)
- Coil Rail Harness Connector End View (4.0L)
- Controller Anti-Lock Brake Module Harness Connector End View
- Data Link Connector End View
- ECT Sensor Harness Connector End View
- Electronic Speed Control Servo Harness Connector End View
- Engine Oil Pressure Switch Harness Connector End View
- EVAP Purge Solenoid Harness Connector End View
- Fuel Injector Connector End View
- Fuel Pump Module Harness Connector End View
- Generator Harness Connector End View
- Hydraulic Cooling Module Harness Connector End View
- IAT Sensor Harness Connector End View
- Idle Air Control Motor Harness Connector End View
- Ignition Switch Connector End View
- Junction Block Fuses & Fuse Circuits Identification
- Knock Sensor Harness Connector End View
- Leak Detection Pump Harness Connector End View
- Map Sensor Harness Connector End View (4.0L)
- Map Sensor Harness Connector End View (4.7L)
- Output Speed Sensor Harness Connector End View (4.0L)
- O2 Sensor Connector End View (Component Side)
- Park/Neutral Position Switch Harness Connector End View (4.0L)
- Power Distribution Center Fuses & Fuse Circuits Identification & Commentary End View
- Power Distribution Center Relay Cavities & Circuits Identification & Commentary End View
- Pcm Commentary End View
- Radiator Fan Motor Harness COMMENTARY END VIEW (4.0L)
- Radiator Fan Motor Relay Harness COMMENTARY END VIEW (4.0L)
- Sentry Key Immobilizer Module Harness Commentary End View
- Speed Control Switch Commentary End View
- TCM Harness Commentary End View (4.7L)
- Throttle Position Sensor Harness Commentary End View (4.0L)
- TP Sensor Harness Commentary End View (4.7L)
- Trailer Left Turn Relay Harness Commentary End View
- Trailer Tow BRAKELIGHT Relay Harness Commentary End View
- Trailer Tow Circuit Breaker Harness Commentary End View
- Trailer Tow Harness Commentary End View
- Transmission Solenoid/TRS Assembly Harness Commentary End View (4.7L)
- O2 Sensor Harness Commentary End View
- Diagnostic Tests
- Notes
- DTC P0031: 1/1 O2 Sensor Heater Circuit Low, DTC P0032: 1/1 O2 Sensor Heater Circuit High, DTC P0037: 1/2 O2 Sensor Heater Circuit Low, DTC P0038: 1/2 O2 Sensor Heater Circuit High, DTC P0051: 2/1 O2 Sensor Heater Circuit Low Or DTC P0052: 2/1 O2 Sensor Heater Circuit High
- DTC P0071: Battery Temp Sensor Performance
- DTC P0107: Map Sensor Voltage Too Low
- DTC P0108: Map Sensor Voltage Too High
- DTC P0111: Intake Air Temp Sensor Performance
- DTC P0112: Intake Air Temp Sensor Voltage Low
- DTC P0113: Intake Air Temp Sensor Voltage High
- DTC P0117: ECT Sensor Voltage Too Low
- DTC P0118: ECT Sensor Voltage Too High
- DTC P0121: TPS Voltage Does Not Agree With Map
- DTC P0122: Throttle Position Sensor Voltage Low
- DTC P0123: Throttle Position Sensor Voltage High
- DTC P0125: Closed Loop Temp Not Reached
- DTC P0131: 1/1 O2 Sensor Shorted To Ground, DTC P0137: 1/2 O2 Sensor Shorted To Ground, DTC P0151: 2/1 O2 Sensor Shorted To Ground Or DTC P0157: 2/2 O2 Sensor Shorted To Ground
- DTC P0132: 1/1 O2 Sensor Shorted To Voltage, DTC P0138: 1/2 O2 Sensor Shorted To Voltage, DTC P0152: 2/1 O2 Sensor Shorted To Voltage Or DTC P0158: 2/2 O2 Sensor Shorted To Voltage
- DTC P0133: 1/1 O2 Sensor Slow Response, DTC P0139: 1/2 O2 Sensor Slow Response, DTC P0153: 2/1 O2 Sensor Slow Response Or DTC P0159: 2/2 O2 Sensor Slow Response
- DTC P0135: 1/1 O2 Sensor Heater Failure, DTC P0141: 1/2 O2 Sensor Heater Failure, DTC P0155: 2/1 O2 Sensor Heater Failure Or DTC P0161: 2/2 O2 Sensor Heater Failure
- DTC P0136: 1/2 O2 Sensor Heater Circuit Malfunction
- DTC P0171: 1/1 Fuel System Lean Or DTC P0174: 2/1 Fuel System Lean
- DTC P0172: 1/1 Fuel System Rich Or DTC P0175: 2/1 Fuel System Rich
- DTC P0201: Injector #1 Control Circuit, DTC P0202: Injector #2 Control Circuit, DTC P0203: Injector #3 Control Circuit, DTC P0204: Injector #4 Control Circuit, DTC P0205: Injector #5 Control Circuit, DTC P0206: Injector #6 Control Circuit, DTC P0207: Injector #7 Control Circuit (4.7L) Or DTC P0208: Injector #8 Control Circuit (4.7L)
- DTC P0300: Multiple Cylinder Misfire, DTC P0301: Cylinder #1 Misfire, DTC P0302: Cylinder #2 Misfire, DTC P0303: Cylinder #3 Misfire, DTC P0304: Cylinder #4 Misfire, DTC P0305: Cylinder #5 Misfire, DTC P0306: Cylinder #6 Misfire, DTC P0307: Cylinder #7 Misfire (4.7L) Or DTC P0308: Cylinder #8 Misfire (4.7L)
- DTC P0320: No Crank Reference Signal At Pcm
- DTC P0325: Knock Sensor #1 Circuit Or DTC P0330: Knock Sensor #2 Circuit
- DTC P0340: No Cam Signal At Pcm
- DTC P0351: Ignition Coil #1 Primary Circuit (4.0L), DTC P0352: Ignition Coil #2 Primary Circuit (4.0L) Or DTC P0353: Ignition Coil #3 Primary Circuit (4.0L)
- DTC P0351: Ignition Coil #1 Primary Circuit (4.7L), DTC P0352: Ignition Coil #2 Primary Circuit (4.7L), DTC P0353: Ignition Coil #3 Primary Circuit (4.7L), DTC P0354: Ignition Coil #4 Primary Circuit (4.7L), DTC P0355: Ignition Coil #5 Primary Circuit (4.7L), DTC P0356: Ignition Coil #6 Primary Circuit (4.7L), DTC P0357: Ignition Coil #7 Primary Circuit (4.7L) Or DTC P0358: Ignition Coil #8 Primary Circuit (4.7L)
- DTC P0420: 1/1 Catalytic Converter Efficiency Or DTC P0432: 2/1 Catalytic Converter Efficiency
- DTC P0441: EVAP Purge Flow Monitor Failure
- DTC P0442: EVAP Leak Monitor Medium (.040") Leak Detected, DTC P0455: EVAP Leak Monitor Large Leak Detected Or DTC P0456: EVAP Leak Monitor Small (.020") Leak Detected
- DTC P0443: EVAP Purge Solenoid Circuit
- DTC P0460: Fuel Level Unit No Change Over Miles Or DTC P0461: Fuel Level Unit No Change Over Time
- DTC P0462: Fuel Level Sending Unit Volts Too Low
- DTC P0463: Fuel Level Sending Unit Volts Too High
- DTC P0500: No Vehicle Speed Sensor Signal
- DTC P0505: Idle Air Control Motor Circuits
- DTC P0522: Oil Pressure Sensor Volts Low
- DTC P0523: Oil Pressure Sensor Volts High
- DTC P0601: Pcm Internal Controller Failure
- DTC P0622: Generator Field Not Switching Properly
- P0645: A/C Clutch Relay Circuit
- DTC P0700: TCM Controller DTC Present
- DTC P1195: 1/1 O2 Sensor Slow During Catalyst Monitor Or DTC P1196: 2/1 O2 Sensor Slow During Catalyst Monitor
- DTC P1281: Engine Is Cold Too Long
- DTC P1282: Fuel Pump/System Relay Control Circuit
- DTC P1294: Target Idle Not Reached
- DTC P1296: No 5 Volts To Map Sensor
- DTC P1297: No Change In Map From Start To Run
- DTC P1299: Vacuum Leak Found
- DTC P1388: Auto Shutdown Relay Control Circuit
- DTC P1389: No ASD Relay Output Voltage At Pcm
- DTC P1391: Intermittent Loss Of CMP Or CKP
- DTC P1398: Misfire Adaptive Numerator At Limit
- DTC P1486: EVAP Leak Monitor Pinched Hose Found
- DTC P1491: Rad Fan Control Relay Circuit (4.0L)
- DTC P1492: Ambient/Battery Temp Sensor Voltage Too High
- DTC P1493: Ambient/Battery Temp Sensor Voltage Too Low
- DTC P1494: Leak Detection Pump SW Or Mechanical Fault
- DTC P1495: Leak Detection Pump Solenoid Circuit
- DTC P1499: Hydraulic Fan Solenoid Circuit (4.7L)
- DTC P1594: Charging System Voltage Too High
- DTC P1595: Speed Control Solenoid Circuits, P1683: Speed Control Power Circuit
- DTC P1596: Speed Control Switch Always High
- DTC P1597: Speed Control Switch Always Low
- DTC P1598: A/C Pressure Sensor Volts Too High
- DTC P1599: A/C Pressure Sensor Volts Too Low
- DTC P1682: Charging System Voltage Too Low
- DTC P1685: Wrong Or Invalid Key MSG Received From Skim
- DTC P1686: No Skim Bus Message Received
- DTC P1687: No Cluster Bus Message
- DTC P1696: Pcm Failure EEPROM Write Denied
- DTC P1698: No Bus Message From TCM
- DTC P1899: TRS Performance
- Verification Tests
- Notes
- Fuel System/Misfire Monitor Verification Test
- Powertrain Verification Test VER-1
- Powertrain Verification Test VER-2
- Powertrain Verification Test VER-3
- Powertrain Verification Test VER-4
- Powertrain Verification Test VER-5
- Powertrain Verification Test VER-6
- Skis Verification Test
- 41TE Transmission Verification Test VER-1
- Wiring Diagrams