3.0l Diesel - Dtcs p1d4c to u1432 Jeep Grand Cherokee WK2

P1D4C- INTERNAL CONTROL MODULE QUANTITY WAVE PLAUSIBILITY ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

WHEN MONITORED

With the ignition on.

SET CONDITION

The Powertrain Control Module (PCM) detects an internal failure.

POSSIBLE CAUSES

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

DIAGNOSTIC TEST

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D4D-INTERNAL CONTROL MODULE RAIL PRESSURE PLAUSIBILITY ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D4E-INTERNAL CONTROL MODULE MONITORING CURRENT TORQUE LIMITATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D4F-INTERNAL CONTROL MODULE MONITORING LEAD TORQUE LIMITATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D55-INTERNAL CONTROL MODULE WATCHDOG QUERY RESPONSE TIME ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D56-INTERNAL CONTROL MODULE CPU UNDERVOLTAGE ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D57-INTERNAL CONTROL MODULE CPU OVERVOLTAGE ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P1D58-INTERNAL CONTROL MODULE WATCHDOG RESET ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects an internal failure.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for «CHECKING THE PCM POWER AND GROUND CIRCUITS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics) . Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2002-DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD

For a complete wiring diagram refer to appropriate SYSTEM WIRING DIAGRAMS article

THEORY OF OPERATION

The Diesel particulate filter is an in-line canister filter located in the exhaust system between the engine and the muffler. This filter captures and stores ash particles created by the diesel combustion process. This filter is monitored by the Powertrain Control Module (PCM) with a Differential Pressure Sensor. This sensor measures the difference in exhaust system pressure before and after the particulate filter through tube connections directly to the exhaust pipe. As ash accumulates in the filter, the exhaust pressure at the inlet side of the filter increases as compared to the pressure at the outlet side of the filter. The PCM monitors the sensor to determine when to perform a particulate filter regeneration procedure which is designed to clear soot collected in the filter.

With the engine running.

The Powertrain Control Module (PCM) detects incorrect exhaust flow through the particulate filter during certain engine operating conditions for 90 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. VISUAL INSPECTION Turn the ignition off. Visually inspect the Exhaust Differential Pressure Sensor for physical damage, proper electrical connection and proper mechanical connection. Ensure any tubes and/or hoses connected to the sensor are in good working condition and properly connected at all ends. Visually inspect the entire exhaust system for bent, crushed or otherwise damaged tubes which may cause an exhaust system restriction. Inspect the exhaust system for exhaust leaks. Were any problems found? Yes Repair or replace as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 2 .
2. PARTICULATE FILTER REGENERATION Start and idle the engine. With the scan tool, erase DTCs in the Powertrain Control Module (PCM). With the scan tool, perform the Diesel Particulate Filter Regeneration procedure. After this procedure is complete, turn the ignition off for 60 seconds. Test drive the vehicle. With the scan tool, view DTCs in the PCM. Is the status Active for this DTC? Yes Go To 3 . No Test complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. EXHAUST DIFFERENTIAL PRESSURE SENSOR CIRCUIT HIGH RESISTANCE Turn the ignition off. Disconnect the Exhaust Differential Pressure Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of each Exhaust Differential Pressure Sensor circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms for each circuit? Yes Go To 4 . No Repair the circuit(s) that measured above 5.0 Ohms for high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. EXHAUST DIFFERENTIAL PRESSURE SENSOR Replace the Exhaust Differential Pressure Sensor. Refer to «SENSOR, DIFFERENTIAL PRESSURE [EXF], REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Turn the ignition on. With the scan tool, erase DTCs in the PCM. Test drive the vehicle With the scan tool, view DTCs in the PCM. Is the status Active for this DTC? Yes Replace the Diesel Particulate Filter. Refer to «FILTER, DIESEL PARTICULATE, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 665

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on.

The Powertrain Control Module (PCM) detects an open in the (N117) Intake Swirl Valve Control circuit for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 666

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Using the scan tool, navigate to Actuator Tests and actuate the Variable Swirl Valve. Using the scan tool, view PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (N117) INTAKE SWIRL VALVE CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Disconnect the PCM C2 harness connector. Measure the resistance of the (N117) Intake Swirl Valve Control circuit between the Intake Swirl Valve jumper harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (N117) EGR Air Flow Control Valve Control circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between ground and the (N117) EGR Air Flow Control Valve Control circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2009-Intake Manifold Runner (Swirl) Control Circuit Low DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2009-INTAKE MANIFOLD RUNNER (SWIRL) CONTROL CIRCUIT LOW - BANK 1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on.

The Powertrain Control Module (PCM) detects that the (N117) Intake Swirl Valve Control circuit is shorted to ground for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 667

1. CHECK FOR ACTIVE DTCS Turn the ignition on. Using the scan tool, erase PCM DTCs. Using the scan tool, navigate to Actuator Tests and actuate the Variable Swirl Valve. Using the scan tool, view PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (N117) INTAKE SWIRL VALVE CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (N117) Intake Swirl Valve Control circuit at the PCM C2 harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (N117) Intake Swirl Valve Control circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between the (N117) EGR Air Flow Control Valve Control circuit and the (F343) Fused ASD Output circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2010-Intake Manifold Runner (Swirl) Control Circuit High DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2010-INTAKE MANIFOLD RUNNER (SWIRL) CONTROL CIRCUIT HIGH - BANK 1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on.

The Powertrain Control Module (PCM) detects that the (N117) Intake Swirl Valve Control circuit is shorted to voltage for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 668

Scheme 669

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Using the scan tool, navigate to Actuator Tests and actuate the Variable Swirl Valve. Using the scan tool, view PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (N117) INTAKE SWIRL VALVE CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Turn the ignition on. Measure the voltage on the (N117) Intake Swirl Valve Control circuit at the Intake Swirl Valve jumper harness connector. Is there any voltage present? Yes Go To 3 . No Repair the (N117) Intake Swirl Valve Control circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (N117) INTAKE SWIRL VALVE CONTROL CIRCUIT SHORTED TO THE (F343) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the PCM C2 harness connector. Measure the resistance between the (N117) Intake Swirl Valve Control circuit and the (F343) ASD Relay Output circuit at the Intake Swirl Valve jumper harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (N117) Intake Swirl Valve Control circuit for a short to the (F343) ASD Relay Output circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between ground and the (N117) EGR Air Flow Control Valve Control circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2009-Intake Manifold Runner (Swirl) Control Circuit Low DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2014-INTAKE MANIFOLD RUNNER (SWIRL) POSITION SENSOR CIRCUIT

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on.

The Powertrain Control Module (PCM) detects an overtemp condition of the Intake Swirl Valve for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 670

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Start the engine and allow it to idle for up to two minutes. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (K351) Intake Swirl Valve Signal circuit at the Intake Swirl Valve jumper harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K351) Intake Swirl Valve Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between the (K351) Intake Swirl Valve Signal circuit and the (F343) Fused ASD Output circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2017-Intake Manifold Runner (Swirl) Position Sensor Circuit High DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2015-INTAKE MANIFOLD RUNNER POSITION SENSOR PERFORMANCE - BANK 1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on and battery voltage above 10.5 Volts.

The Powertrain Control Module (PCM) detects that the Intake Swirl Valve is stuck in one position eight times.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Using the scan tool, actuate the Intake Swirl Valve. Monitor the scan tool for PCM DTCs. NOTE: Repair any other Intake Swirl Valve control or position sensor DTCs before continuing with this diagnostic procedure. Is the DTC active? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. INTAKE SWIRL VALVE Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, Check for excessive buildup or coking in the Intake Manifold that may be causing the Intake Swirl Valve to stick or bind. Also inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Start the engine and allow it to idle for up to two minutes. Using the scan tool, view active DTCs. Did the DTC return? Yes Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Test complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2016-INTAKE MANIFOLD RUNNER (SWIRL) POSITION SENSOR CIRCUIT LOW - BANK 1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on.

The Powertrain Control Module (PCM) detects that the (K351) Intake Swirl Valve Signal circuit voltage is low for one second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 671

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Using the scan tool, actuate the Intake Swirl Valve. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (K351) Intake Swirl Valve Signal circuit at the Intake Swirl Valve jumper harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K351) Intake Swirl Valve Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT SHORTED TO THE (K945) INTAKE SWIRL VALVE RETURN CIRCUIT Measure the resistance between the (K351) Intake Swirl Valve Signal circuit and the (K945) Intake Swirl Valve Actuator Return circuit at the Intake Swirl Valve jumper harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the short between the (K351) Intake Swirl Valve Signal circuit and the (K945) Intake Swirl Valve Actuator Return circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between the (K351) Intake Swirl Valve Signal circuit and the (F343) Fused ASD Output circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2017-Intake Manifold Runner (Swirl) Position Sensor Circuit High DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2017-INTAKE MANIFOLD RUNNER (SWIRL) POSITION SENSOR CIRCUIT HIGH - BANK1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Intake Swirl Valve is located under the Intake Manifold. The Intake Swirl Valve is not accessible without removing the Intake Manifold. There is a short jumper harness from the Intake Swirl Valve that can be accessed for perfoming checks of the main wiring harness. The Intake Swirl Valve is supplied 12 Volts by the ASD circuit and is controlled by the PCM using the (N117) Intake Swirl Valve Control circuit which is Pulse Width Modulated (PWM). The Intake Swirl Valve has an internal position sensor that is monitored by the PCM over the (K351) Intake Swirl Valve Signal circuit. The position sensor operates as a typical two wire sensor. The Intake Swirl Valve is used to create turbulence in the air entering the combustion chamber which helps to reduce emissions.

With the ignition on and the Intake Swirl Valve commanded off.

The Powertrain Control Module (PCM) detects that the (K351) Intake Swirl Valve Signal circuit voltage is high for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 672

Scheme 673

Scheme 674

Scheme 675

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Using the scan tool, actuate the Intake Swirl Valve. Using the scan tool, view PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK FOR THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT SHORTED TO THE (K945) INTAKE SWIRL VALVE RETURN CIRCUIT Turn the ignition off. Disconnect the Intake Swirl Valve jumper harness connector. Turn the ignition on. Measure the voltage on the (K351) Intake Swirl Valve Signal circuit at the Intake Swirl Valve jumper harness connector. Does the voltage measure above 5.2 Volts? Yes Repair the (K351) Intake Swirl Valve Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK FOR THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT SHORTED TO THE (F343) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the PCM C2 harness connector. Measure the resistance between the (K351) Intake Swirl Valve Signal circuit and the (F343) ASD Relay Output circuit at the Intake Swirl Valve jumper harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K351) Intake Swirl Valve Signal circuit for a short to the (F343) ASD Relay Output circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K351) INTAKE SWIRL VALVE SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE I Measure the resistance of the (K351) Intake Swirl Valve Signal circuit between the Intake Swirl Valve jumper harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K351) Intake Swirl Valve Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK THE (K945) INTAKE SWIRL VALVE RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE I Measure the resistance of the (K945) Intake Swirl Valve Return circuit between the Intake Swirl Valve jumper harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (K945) Intake Swirl Valve Return circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. INTAKE SWIRL VALVE Reconnect the PCM C2 harness connector. Connect a jumper between ground and the (K351) Intake Swirl Valve Signal circuit at the Intake Swirl Valve jumper harness connector (main harness side). Turn the ignition on. Using the scan tool, navigate to Actuator Tests and toggle the Intake Swirl Valve. Using the scan tool, view PCM DTCs. NOTE: The scan tool should display a P2016-Intake Manifold Runner (Swirl) Position Sensor Circuit Low DTC as active or pending with the jumper in place. Did the scan tool display the DTC as describe above? Yes Replace the Intake Swirl Valve in accordance with the service information. Refer to «ACTUATOR, SWIRL VALVE, REMOVAL»(ref-466389-S06237631572012042500000) . NOTE: Before replacing the Intake Swirl Valve, carefully inspect the jumper harness and connectors for damage. If any damage is found, replace the jumper harness. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 676

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit is shorted to ground.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 677

Scheme 678

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K372) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Disconnect the PCM C1 harness connector. Measure the resistance between ground and the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (K372) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR RETURN CIRCUIT Measure the resistance between the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit and the (K900) Sensor Return circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit for a short to the (K900) Sensor Return circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. EXHAUST GAS TEMPERATURE SENSOR Reconnect the PCM C1 harness connector. Reconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Turn the ignition on. With the scan tool, clear DTCs. Turn the ignition off. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Turn the ignition on. With the scan tool, select View DTCs. Monitor the scan tool for at least two minutes. NOTE: The scan tool should display a P2033-Exhaust Gas Temperature Sensor 1/2 Circuit High DTC as active with the Exhaust Gas Temperature Sensor 1/2 connector unplugged. Does the scan tool display the DTC as described above? Yes Replace the Exhaust Gas Temperature Sensor 1/2 in accordance with the service information. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 5 .
5. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Gas Temperature Sensor 1/2 and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2033-EXHAUST GAS TEMPERATURE SENSOR CIRCUIT HIGH - BANK 1 SENSOR 2

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Exhaust Gas Temperature Sensor 1/2 Signal is above the maximum threshold for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 679

Scheme 680

Scheme 681

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K372) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Turn the ignition on. Measure the voltage of the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector. Is the voltage above 5.2 Volts? Yes Repair the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK THE (K372) EXHAUST TEMPERATURE SENSOR 1/2 SIGNAL FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the PCM C1 harness connector. Measure the resistance of the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit between the Exhaust Gas Temperature Sensor 1/2 harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K372) Exhaust Gas Temperature Sensor 1/2 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K900) SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K900) Sensor Return circuit between the Exhaust Gas Temperature Sensor 1/2 harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K900) Sensor Return circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. EXHAUST GAS TEMPERATURE SENSOR 1/2 Turn the ignition off. Reconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Reconnect the PCM C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector. Connect a jumper wire between the (K372) Exhaust Gas Temperature Sensor 2 Signal circuit and the (K900) Sensor Return circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector. Turn the ignition on. With the scan tool, select View DTCs. NOTE: The scan tool should display a P2032-Exhaust Gas Temperature Sensor Circuit Low DTC with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Replace the Exhaust Gas Temperature Sensor 1/2. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 6 .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Gas Temperature Sensor 1/2 and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 682

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The Powertrain Control Module (PCM) detects an open on the EGR Air Flow Control Valve Control circuit for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 683

Scheme 684

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Using the scan tool, view PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K314) EGR AIR FLOW CONTROL VALVE (+) CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the PCM C2 harness connector. Measure the resistance of the (K314) EGR Air Flow Control Valve (+) Control circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (K314) EGR Air Flow Control Valve (+) Control circuit for an open. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K315) EGR AIR FLOW CONTROL VALVE (-) CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K315) EGR Air Flow Control Valve (-) Control circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K315) EGR Air Flow Control Valve (-) Control circuit for an open. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. EGR AIR FLOW CONTROL VALVE Reconnect the EGR Air Flow Control Valve harness connector. Reconnect the PCM C2 harness connector. Turn the ignition on. Using the scan tool, erase PCM DTCs. Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Connect a jumper between ground and the (K314) EGR Air Flow Control Valve (+) Control circuit. Turn the ignition on. Using the scan tool, view PCM DTCs. Did the P2102-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT LOW DTC set as active with the jumper in place? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2101-ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The Powertrain Control Module (PCM) detects an overload or over temperature condition on the EGR Air Flow Control Valve Control circuit for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. EGR AIR FLOW CONTROL VALVE Remove the air inlet hose at the EGR Air Flow Control Valve. Cycle the ignition on and off several times. Check for any obstructions causing the EGR Air Flow Control Valve to bind or stick. Was the valve found to be sticking or binding in any way? Yes Repair the cause of the obstruction or binding and retest. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2102-EGR AIR FLOW CONTROL VALVE CIRCUIT LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The PCM detects a short ground on the EGR Air Flow Control Valve Control circuit for 0.2 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 685

Scheme 686

Scheme 687

Scheme 688

Scheme 689

1. CHECK FOR ACTIVE DTCS Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K314) EGR AIR FLOW CONTROL VALVE (+) CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (K314) EGR Air Flow Control Valve (+) Control circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K314) EGR Air Flow Control Valve (+) Control circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K22) EGR AIR FLOW CONTROL VALVE POSITION SIGNAL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (K22) EGR Air Flow Control Valve Position Signal circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K22) EGR Air Flow Control Valve Position Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK FOR THE (K314) EGR AIR FLOW CONTROL VALVE (+) CONTROL CIRCUIT SHORTED TO THE (K922) SENSOR GROUND CIRCUIT Measure the resistance between the (K314) EGR Air Flow Control Valve (+) Control circuit and the (K922) Sensor Ground circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 5 . No Repair the (K314) EGR Air Flow Control Valve (+) Control circuit for a short to the (K922) Sensor Ground circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK FOR THE (K22) EGR AIR FLOW CONTROL VALVE POSITION SIGNAL CIRCUIT SHORTED TO THE (K922) SENSOR GROUND CIRCUIT Measure the resistance between the (K22) EGR Air Flow Control Valve Position Signal circuit and the (K922) Sensor Ground circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 6 . No Repair the (K22) EGR Air Flow Control Valve Position Signal circuit for a short to the (K922) Sensor Ground circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. CHECK THE (K22) EGR AIR FLOW CONTROL VALVE POSITION SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K22) EGR Air Flow Control Valve Position Signal circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector Is the resistance below 5.0 Ohms? Yes Go To 7 . No Repair the (K312) EGR Air Flow Control Valve Position Signal circuit for high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
7. EGR AIR FLOW CONTROL VALVE Reconnect the PCM C2 harness connector. Turn the ignition on. Using the scan tool, erase PCM DTCs. Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Cycle the ignition on and off several times. Using the scan tool, view PCM DTCs. Did the P2100-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT OPEN DTC set as active or pending with the jumper in place? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2103-ELECTRONIC THROTTLE CONTROL MOTOR HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The Powertrain Control Module (PCM) detects excessive current on the EGR Air Flow Control Valve Control circuit for 0.2 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 690

Scheme 691

Scheme 692

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Test drive the vehicle and monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K314) EGR AIR FLOW CONTROL VALVE (+) CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Remove the ASD Relay. Connect a jumper between cavities 30 and 87 of the ASD Relay connector. Turn the ignition on. Measure the voltage on the (K314) EGR Air Flow Control Valve (+) Control circuit at the EGR Air Flow Control Valve harness connector. Is the voltage above 5.2 volts? Yes Repair the (K314) EGR Air Flow Control Valve (+) Control circuit for a short voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK THE (K22) EGR AIR FLOW CONTROL VALVE POSITION SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (K22) EGR Air Flow Control Valve Position Signal circuit at the EGR Air Flow Control Valve harness connector. Is there any voltage present? Yes Repair the (K22) EGR Air Flow Control Valve Position Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 4 .
4. CHECK THE (K922) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Reinstall the ASD Relay in the TIPM. Disconnect the PCM C2 harness connector. Measure the resistance of the (K922) Sensor Ground circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K922) Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. EGR AIR FLOW CONTROL VALVE Turn the ignition off. Reconnect the PCM C2 harness connector. Turn the ignition on. Using the scan tool, view PCM DTCs. Did the P2100-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT OPEN DTC set as active or pending with the connector unplugged? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2107-ELECTRONIC THROTTLE CONTROL MODULE PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The Powertrain Control Module (PCM) detects an implausible signal on the EGR Air Flow Control Valve Control circuit for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE EGR AIR FLOW CONTROL VALVE FOR BINDING Turn the ignition off. Remove the Air intake hose at the EGR Air Flow Control Valve. Cycle the ignition on and off several times and check the EGR Air Flow Control Valve for binding or obstructions. Was the valve found to be binding or sticking in any way? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK FOR HIGH RESISTANCE IN THE (K22) EGR AIR FLOW CONTROL VALVE POSITION SENSOR CIRCUIT Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the PCM C2 harness connector. Measure the resistance of the (K22) EGR Air Flow Control Valve Position Sensor circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K22) EGR Air Flow Control Valve Position Sensor circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K922) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K922) Sensor Ground circuit between the EGR Air Flow Control Valve harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K922) Sensor Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. EGR AIR FLOW CONTROL VALVE FOR BINDING Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . With the scan tool, erase in the PCM. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, select View DTCs. Did the DTC return? Yes Go To 6 . No Repair complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the Powertrain Control Module wiring and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P210C-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT LOW - BANK 2

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The PCM detects a short ground on the EGR Air Flow Control Valve Control circuit for 0.2 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 693

Scheme 694

1. CHECK FOR ACTIVE DTCS Turn the ignition on. Using the scan tool, erase PCM DTCs. Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle. Monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K315) EGR AIR FLOW CONTROL VALVE (-) CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (K315) EGR Air Flow Control Valve (-) Control circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K315) EGR Air Flow Control Valve (-) Control circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (K315) EGR AIR FLOW CONTROL VALVE (-) CONTROL CIRCUIT SHORTED TO THE (K922) SENSOR GROUND CIRCUIT Measure the resistance between the (K315) EGR Air Flow Control Valve (-) Control circuit and the (K922) Sensor Ground circuit at the EGR Air Flow Control Valve harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K315) EGR Air Flow Control Valve (-) Control circuit for a short to the (K922) Sensor Ground circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. EGR AIR FLOW CONTROL VALVE Reconnect the PCM C2 harness connector. Turn the ignition on. Using the scan tool, erase PCM DTCs. Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Cycle the ignition on and off several times. Using the scan tool, view PCM DTCs. Did the P2100-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT OPEN DTC set as active or pending with the harness connector unplugged? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P210D-ELECTRONIC THROTTLE CONTROL MOTOR HIGH - BANK 2

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the ignition on.

The Powertrain Control Module (PCM) detects excessive current on the EGR Air Flow Control Valve Control circuit for 0.2 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 695

1. CHECK FOR ACTIVE DTC Turn the ignition on. Using the scan tool, erase PCM DTCs. Test drive the vehicle and monitor the scan tool for PCM DTCs. Did this DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K315) EGR AIR FLOW CONTROL VALVE (-) CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Remove the ASD Relay from the TIPM. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector. Turn the ignition on. Measure the voltage of the (K315) EGR Air Flow Control Valve (-) Control circuit at the EGR Air Flow Control Valve harness connector. Is there any voltage present? Yes Repair the (K315) EGR Air Flow Control Valve (-) Control circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. EGR AIR FLOW CONTROL VALVE Turn the ignition off. Reconnect the PCM C2 harness connector. Turn the ignition on. Using the scan tool, view PCM DTCs. Did the P2100-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT OPEN DTC set as active or pending with the connector unplugged? Yes Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 696

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Accelerator Pedal Position (APP) Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the Powertrain Control Module (PCM). The raw voltage signal from APP No. 1 sensor is two times the raw voltage signal from APP No. 2. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.

With the ignition on.

The APP Sensor No. 1 Signal circuit is below the calibrated threshold for 0.31 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 697

Scheme 698

Scheme 699

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure for that DTC before continuing with this test. NOTE: The APP Sensor No. 2 signal should always be approximately 1/2 the voltage of the APP Sensor No. 1 signal. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Fully depress and release the Accelerator Pedal several times. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the APP Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance between ground and the (K23) APP Sensor No. 1 Signal circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the (K23) APP Sensor No. 1 Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO THE SENSOR GROUND CIRCUITS Measure the resistance between the (K23) APP Sensor No. 1 Signal circuit and the (K167) APP Sensor No. 1 Sensor Ground circuit at the APP Sensor harness connector. Measure the resistance between the (K23) APP Sensor No. 1 Signal circuit and the (K400) APP Sensor No. 2 Sensor Ground circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms for both measurements? Yes Go To 4 . No Repair the short to the circuit that measured below 10k Ohms. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K23) APP Sensor No. 1 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K23) APP Sensor No. 1 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. ACCELERATOR PEDAL POSITION SENSOR Reconnect the APP Sensor harness connector. Reconnect the PCM C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off. Disconnect the APP Sensor harness connector. Connect a jumper between the (K855) APP Sensor No. 1 5-Volt Supply circuit and the (K23) APP Sensor No. 1 Signal circuit at the APP Sensor harness connector. Turn the ignition on. With the scan tool, select View DTCs. NOTE: The scan tool should display an Accelerator Pedal Position Sensor No. 1 High DTC as active with the jumper in place. Does the scan tool display the DTC as described above? Yes Replace the Accelerator Pedal Position Sensor in accordance with the service information. Refer to «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 6 .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2123-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Accelerator Pedal Position (APP) Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the PCM. The raw voltage signal from APP No. 1 Sensor is 2 times the raw voltage signal from APP No. 2 Sensor. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.

With the ignition on.

The APP Sensor No. 1 signal circuit is above the calibrated threshold for 0.31 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 700

Scheme 701

Scheme 702

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure for that DTC before continuing with this test. NOTE: The APP Sensor No. 2 signal should always be approximately 1/2 the voltage of the APP Sensor No. 1 signal. Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the APP Sensor harness connector. Disconnect the PCM C1 harness connector. Remove the ASD Relay from the TIPM. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector. Turn the ignition on. Measure the voltage of the (K23) APP Sensor No. 1 Signal circuit at the APP Sensor harness connector. Is there any voltage present? Yes Repair the (K23) APP Sensor No. 1 Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO THE 5-VOLT SUPPLY CIRCUITS Turn the ignition off. Remove the jumper wire and install the ASD Relay. Measure the resistance between the (K23) APP Sensor No. 1 Signal circuit and the (K855) APP Sensor No. 1 5-Volt Supply circuit at the APP Sensor harness connector. Measure the resistance between the (K23) APP Sensor No. 1 Signal circuit and the (K856) APP Sensor No. 2 5-Volt Supply circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms between the (K23) APP Sensor No. 1 Signal circuit and both 5-Volt Supply circuits? Yes Go To 4 . No Repair the (K23) APP Sensor No. 1 Signal circuit for a short to the circuit that measured below 10k ohms. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K167) APP SENSOR NO. 1 SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K167) APP Sensor No. 1 Sensor Ground circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K167) APP Sensor No. 1 Sensor Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. ACCELERATOR PEDAL POSITION SENSOR Reconnect the APP Sensor harness connector. Reconnect the PCM C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off. Disconnect the APP Sensor harness connector. Connect a jumper wire between the (K167) APP Sensor No. 1 Sensor Ground circuit and the (K23) APP Sensor No. 1 Signal circuit at the APP Sensor harness connector. Turn the ignition on. With the scan tool, select View DTCs. NOTE: The scan tool should display an Accelerator Pedal Position Sensor No. 1 Low DTC as active with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Replace the Accelerator Pedal Position Sensor in accordance with the service information. Refer to «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 6 .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2127-ACCELERATOR PEDAL POSITION SENSOR 2 CIRCUIT LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Accelerator Pedal Position (APP) Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the Powertrain Control Module (PCM). The raw voltage signal from APP No. 1 Sensor is 2 times the raw voltage signal from APP No. 2 Sensor. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.

With the ignition on.

The APP Sensor No. 2 Signal circuit is below the calibrated threshold for 0.31 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 703

Scheme 704

Scheme 705

Scheme 706

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure for that DTC before continuing with this test. NOTE: The APP Sensor No. 2 signal should always be approximately 1/2 the voltage of the APP Sensor No. 1 signal. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Fully depress and release the Accelerator Pedal several times. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K856) APP SENSOR No. 2 5-VOLT SUPPLY CIRCUIT VOLTAGE Turn the ignition off. Disconnect the APP Sensor harness connector. Turn the ignition on. Measure the voltage of the (K856) APP Sensor No. 2 5-Volt Supply circuit at the APP Sensor harness connector. Is the voltage reading above 4.8 volts? Yes Go To 3 . No Repair the (K856) APP Sensor No. 2 5-Volt Supply circuit for an open circuit or short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K29) APP SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the PCM C1 harness connector. Measure the resistance between ground and the (K29) APP Sensor No. 2 Signal circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K29) APP Sensor No. 2 Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K29) APP SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO THE SENSOR GROUND CIRCUITS Measure the resistance between the (K29) APP Sensor No. 2 Signal circuit and the (K400) APP Sensor No. 2 Sensor Ground circuit at the APP Sensor harness connector. Measure the resistance between the (K29) APP Sensor No. 2 Signal circuit and the (K167) APP Sensor No. 1 Sensor Ground circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms between the (K29) APP Sensor No. 2 Signal circuit and both Sensor Ground circuits? Yes Go To 5 . No Repair the (K29) Accelerator Pedal Position Sensor No. 2 Signal circuit for a short to the circuit that measured below 10k Ohms. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK THE (K29) APP SENSOR 2 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K29) APP Sensor No. 2 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (K29) APP Sensor No. 2 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. ACCELERATOR PEDAL POSITION SENSOR Reconnect the APP Sensor harness connector. Reconnect the PCM C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off. Disconnect the APP Sensor harness connector. Connect a jumper between the (K856) APP Sensor No. 2 5-Volt Supply circuit and the (K29) APP Sensor No. 2 Signal circuit at the APP Sensor harness connector. Turn the ignition on. With the scan tool, view DTCs. NOTE: The scan tool should display a P2128-Accelerator Pedal Position Sensor No. 2 High DTC as active or pending with the jumper in place. Does the scan tool display the DTC as described above? Yes Replace the Accelerator Pedal Position Sensor in accordance with the service information. Refer to «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 7 .
7. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2128-ACCELERATOR PEDAL POSITION SENSOR 2 CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Accelerator Pedal Position (APP) Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the Powertrain Control Module (PCM). The raw voltage signal from APP No. 1 Sensor is 2 times the raw voltage signal from APP No. 2 Sensor. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.

With the ignition on.

The APP Sensor No. 2 signal circuit is above the calibrated threshold for 0.31 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 707

Scheme 708

Scheme 709

1. DTC IS ACTIVE NOTE: If any Sensor Reference or Sensor Supply voltage DTCs are present, perform the applicable diagnostic procedure before continuing with this test. NOTE: The APP Sensor 2 signal should always be approximately 1/2 the voltage of the APP Sensor 1 signal. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Fully depress and release the Accelerator Pedal several times. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K29) APP SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Disconnect the PCM C1 harness connector. Remove the ASD Relay from the TIPM. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector. Turn the ignition on. Measure the voltage of the (K29) APP Sensor No. 2 Signal circuit in the APP Sensor harness connector. Is there voltage present on any of the circuits? Yes Repair the (K29) APP Sensor No. 2 Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK THE (K29) APP SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO THE 5-VOLT SUPPLY CIRCUITS Turn the ignition off. Remove the jumper wire and install the ASD Relay. Measure the resistance between the (K29) APP Sensor No. 2 Signal circuit and the (K856) APP Sensor No. 2 5-Volt Supply circuit at the APP Sensor harness connector. Measure the resistance between the (K29) APP Sensor No. 2 Signal circuit and the (K855) APP Sensor No. 1 5-Volt Supply circuit at the APP Sensor harness connector. Is the resistance above 10k Ohms between the (K29) APP Sensor No. 2 Signal circuit and 5-Volt Supply circuits? Yes Go To 4 . No Repair the (K29) APP Sensor No. 2 Signal circuit for a short to the circuit that measured below 10k Ohms. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K400) APP SENSOR 2 GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K29) APP Sensor No. 2 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K29) APP Sensor No. 2 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. ACCELERATOR PEDAL POSITION SENSOR Reconnect the APP Sensor harness connector. Reconnect the PCM C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off. Disconnect the APP Sensor harness connector. Connect a jumper wire between the (K400) APP Sensor No. 2 Sensor Ground circuit and the (K29) APP Sensor No. 2 Signal circuit at the APP Sensor harness connector. Turn the ignition on. With the scan tool, select View DTCs. NOTE: The scan tool should display an Accelerator Pedal Position Sensor No. 2 Low DTC as active with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Replace the Accelerator Pedal Position Sensor in accordance with the service information. Refer to «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 6 .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2135-THROTTLE POSITION SENSOR 1/2 CORRELATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Accelerator Pedal Position (APP) Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the Powertrain Control Module (PCM). The raw voltage signal from APP No. 1 Sensor is two times the raw voltage signal from APP No. 2 Sensor. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.

With the ignition on. No other APP Sensor DTCs set.

APP Sensor No. 1 and APP Sensor No. 2 signals do not agree for 0.4 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 710

Scheme 711

1. DTC IS ACTIVE NOTE: If any Sensor Reference or Sensor Supply voltage DTCs are present, perform the applicable diagnostic procedure before continuing with this test. NOTE: The APP Sensor 2 signal should always be approximately 1/2 the voltage of the APP Sensor 1 signal. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Fully depress and release the Accelerator Pedal several times. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK FOR HIGH RESISTANCE IN THE (K855) APP SENSOR NO. 1 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the APP Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of the (K855) APP Sensor No. 1 5-Volt Supply circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (K855) APP Sensor No. 1 5-Volt Supply circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR HIGH RESISTANCE IN THE (K23) APP SENSOR NO. 1 SIGNAL CIRCUIT Measure the resistance of the (K23) APP Sensor No. 1 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K23) APP Sensor No. 1 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (K167) APP SENSOR NO. 1 GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K167) APP Sensor No. 1 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K29) APP Sensor No. 1 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK FOR HIGH RESISTANCE IN THE (K857) APP SENSOR NO. 2 5-VOLT SUPPLY CIRCUIT Measure the resistance of the (K857) APP Sensor No. 2 5-Volt Supply circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (K857) APP Sensor No. 2 5-Volt Supply circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. CHECK FOR HIGH RESISTANCE IN THE (K29) APP SENSOR NO. 2 SIGNAL CIRCUIT Measure the resistance of the (K29) APP Sensor No. 2 Signal circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 7 . No Repair the (K29) APP Sensor No. 2 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
7. CHECK THE (K400) APP SENSOR NO. 2 GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K400) APP Sensor No. 2 Ground circuit between the APP Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Replace the Accelerator Pedal Position Sensor in accordance with the service information. Refer to «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Repair the (K400) APP Sensor No. 2 Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2148-FUEL INJECTOR GROUP 1 SUPPLY VOLTAGE CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the Fuel Injectors actuated.

The Powertrain Control Module (PCM) detects a short circuit error on one of the bank 1 Fuel Injector control circuits.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE NOTE: This DTC can set as a result of a short circuit in either of the bank 1 injector circuits (Fuel Injector one or three). Be sure to check all bank 1 injector circuits before replacing an injector and all injectors before replacing a module. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Attempt to start the engine and test drive the vehicle. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE FUEL INJECTOR HIGH-SIDE CONTROL CIRCUITS FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Fuel Injector harness connectors. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the Fuel Injector High-Side Control circuits at either Fuel Injector harness connector. Is the resistance above 10k Ohms for the Fuel Injector High-Side Control circuits? Yes Repair the Fuel Injector High-Side Control circuit for a short to ground. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Go To 3 .
3. CHECK THE FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the Fuel Injector Low-Side Control circuits at the Fuel Injector harness connectors. Is the resistance above 10k Ohms for the Fuel Injector Low-Side Control circuits? Yes Repair the Fuel Injector Low-Side Control circuit that measured below 10k Ohms for a short to ground. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Go To 4 .
4. CHECK THE FUEL INJECTOR FOR AN INTERNAL SHORT TO GROUND Measure the resistance between either terminal of each Fuel Injector and ground. Is the resistance above 10k Ohms for each Fuel Injector? Yes Go To 5 . No Replace the Fuel Injector that did not measure above 10k Ohms to ground. Refer to «INJECTOR(S), FUEL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «INJECTOR(S), FUEL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to .
5. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Injectors and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to .

P2151-FUEL INJECTOR GROUP 2 SUPPLY VOLTAGE CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the Fuel Injectors actuated.

The Powertrain Control Module (PCM) detects a short circuit error on one of the bank 2 Fuel Injector control circuits.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE NOTE: This DTC can set as a result of a short circuit in either of the bank 2 injector circuits (Fuel Injector four or six). Be sure to check all bank 2 injector circuits before replacing an injector and all injectors before replacing a module. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Attempt to start the engine and test drive the vehicle. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE FUEL INJECTOR HIGH-SIDE CONTROL CIRCUITS FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Fuel Injector harness connectors. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the Fuel Injector High-Side Control circuits at either Fuel Injector harness connector. Is the resistance above 10k Ohms for the Fuel Injector High-Side Control circuits? Yes Repair the Fuel Injector High-Side Control circuit for a short to ground. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Go To 3 .
3. CHECK THE FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the Fuel Injector Low-Side Control circuits at the Fuel Injector harness connectors. Is the resistance above 10k Ohms for the Fuel Injector Low-Side Control circuits? Yes Repair the Fuel Injector Low-Side Control circuit that measured below 10k Ohms for a short to ground. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Go To 4 .
4. CHECK THE FUEL INJECTOR FOR AN INTERNAL SHORT TO GROUND Measure the resistance between either terminal of each Fuel Injector and ground. Is the resistance above 10k Ohms for each Fuel Injector? Yes Go To 5 . No Replace the Fuel Injector that did not measure above 10k Ohms to ground. Refer to «INJECTOR(S), FUEL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «INJECTOR(S), FUEL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to .
5. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Injectors and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to . No Replace and program the Powertrain Control Module in accordance the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST - 2.0L DIESEL. Refer to .

P2173-THROTTLE ACTUATOR CONTROL SYSTEM - HIGH AIR FLOW DETECTED

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Air Flow Control Valve is an electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The valve is controlled by the Powertrain Control Module (PCM) through two control circuits. When the PCM closes the throttle valve creating a low pressure (vacuum) in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system. The EGR Air Flow Control Valve has an internal position sensor. The PCM receives feedback from the sensor to indicate the position of the throttle blade. The position sensor operates as a typical three wire sensor.

With the engine running, in DPF regeneration.

The Powertrain Control Module (PCM) detects EGR Air Flow Control minimum airflow threshold is not able to be reached for 6.0 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. CHECK FOR AN EGR SYSTEM LEAK NOTE: Repair any other fuel system related DTCs before continuing with this diagnostic procedure. Turn the ignition off. Visually inspect the entire EGR System for signs of a leak or restriction. Look for soot around any connections in the EGR system. Were any problems found? Yes Go To 2 . No Perform the appropriate repairs. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK FOR INTAKE SYSTEM AIR LEAKS Perform a careful inspection of the entire intake system. Look for any possible leaks or for any restrictions of the intake system. Were any problems found? Yes Repair or replace as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the EGR Air Flow Control Valve in accordance with the service information. Refer to «VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#emissions-control) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2226-BAROMETRIC PRESSURE SENSOR CIRCUIT

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects Barometric Pressure Sensor signal is implausible. The Barometric Pressure Sensor is located internal to the PCM.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2228-BAROMETRIC PRESSURE SENSOR CIRCUIT LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects Barometric Pressure Sensor circuit is below a calibrated threshold for 0.8 second. The Barometric Pressure Sensor is located internal to the PCM.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2229-BAROMETRIC PRESSURE SENSOR CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Barometric Pressure Sensor circuit voltage is above a calibrated threshold for 0.8 second. The Barometric Pressure Sensor is located internal to the PCM.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 712

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the O2 Sensor 1/1 active.

The Powertrain Control Module (PCM) detects that the O2 Sensor concentration level is outside of a predefined window during heater coupling detection.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 713

1. DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Test drive the vehicle and monitor the scan tool. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK FOR THE (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO THE (K79) O2 SENSOR 1/1 HEATER CONTROL CIRCUIT Turn the ignition off. Disconnect the Oxygen Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance between the (K41) O2 Sensor 1/1 Signal circuit and the (K79) O2 Sensor 1/1 Heater Control circuit at the Oxygen Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the short between the (K41) O2 Sensor 1/1 Signal circuit and the (K79) O2 Sensor 1/1 Heater Control circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. OXYGEN SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Replace the Oxygen Sensor in accordance with the service information. Refer to «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Test drive the vehicle and monitor the scan tool. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 4 . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2237-O2 SENSOR 1/1 PUMP CELL CURRENT CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the O2 Sensor 1/1 at operating temperature.

The Powertrain Control Module (PCM) detects an open on the (K89) O2 Sensor 1/1 Positive Current Control circuit for 2.0 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 714

1. DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Test drive the vehicle and monitor the scan tool. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K89) O2 SENSOR 1/1 NEGATIVE CURRENT CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the Oxygen Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of the (K89) O2 Sensor 1/1 Negative Current Control circuit between the Oxygen Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (K89) 02 1/1 Negative Current Control circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. OXYGEN SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Replace the Oxygen Sensor in accordance with the service information. Refer to «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Test drive the vehicle and monitor the scan tool. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 4 . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2243-O2 SENSOR 1/1 REFERENCE VOLTAGE CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the O2 Sensor 1/1 at operating temperature.

The Powertrain Control Module (PCM) detects an open on the (K902) O2 Sensor 1/1 Ground circuit for 2.0 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 715

Scheme 716

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (F343) FUSED IGNITION SWITCH OUTPUT CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Oxygen Sensor harness connector. Turn the ignition on. Using a 12-volt test light, probe the (F343) Fused Ignition Switch Output circuit at the Oxygen Sensor harness connector. Is the Test light illuminated and bright? Yes Go To 3 . No Repair the (F343) Fused Ignition Switch Output circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K902) O2 SENSOR 1/1 GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the Oxygen Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of the (K902) 02 Sensor 1/1 Ground circuit between the Oxygen Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K902) 02 Sensor 1/1 Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. OXYGEN SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Replace the Oxygen Sensor in accordance with the service information. Refer to «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Start the engine. Allow the engine to reach normal operating temperature. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 5 . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2244-O2 SENSOR REFERENCE VOLTAGE - BANK 1 SENSOR 1

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and the O2 Sensor 1/1 at operating temperature.

The Powertrain Control Module (PCM) detects an open on the (K41) O2 Sensor 1/1 Signal circuit for 2.0 seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 717

1. DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the Oxygen Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of the (K41) O2 Sensor 1/1 Positive Current Control circuit between the Oxygen Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (K41) 02 1/1 Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. OXYGEN SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Replace the Oxygen Sensor in accordance with the service information. Refer to «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Turn the ignition on. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 4 . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Scheme 718

For a complete wiring diagram, refer to wiring information .

With the ignition on.

Low voltage detected at the Water In Fuel (WIF) Sensor signal circuit at the Powertrain Control Module (PCM).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 719

Scheme 720

1. ACTIVE DTC Ignition on, engine not running. With the scan tool check for active DTCs. Is the DTC active? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (G123) WIF SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn ignition off. Disconnect the Water In Fuel (WIF) Sensor harness connector. Disconnect the PCM C1 harness connector. Measure resistance between the (G123) WIF Sensor signal circuit and ground at the WIF Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 3 . No Repair the short to ground in the (G123) WIF Sensor signal circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK FOR THE (G123) WIF SENSOR SIGNAL CIRCUIT SHORTED TO THE (K923) WIF SENSOR GROUND Measure the resistance between the (G123) WIF Sensor signal circuit and the (K923) WIF Sensor ground circuit at the sensor connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the short between the (G123) WIF Sensor signal circuit and the (K923) WIF Sensor ground circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. WATER IN FUEL SENSOR Turn the ignition off. Replace the Water In Fuel Sensor in accordance with the service information. Refer to «SENSOR, WATER IN FUEL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Reconnect the PCM C1 harness connector. Turn ignition on, engine not running. With the scan tool erase DTCs. With the scan tool, view active DTCs. Did the DTC return? Yes Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Repair complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P244A-DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE TOO LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Diesel Particulate Filter is an in-line canister filter located in the exhaust system between the engine and the muffler. This filter captures and stores soot particles created by the diesel combustion process. As ash and soot accumulate in the filter, the exhaust pressure at the inlet side of the filter increases as compared to the pressure at the outlet side of the filter. This filter is monitored by the Powertrain Control Module (PCM) with a Differential Pressure Sensor. There is a tube at the inlet and outlet of the Diesel Particulate Filter. A hose is attached to each tube. The other end of the hose is connected to the Differential Pressure Sensor. The Differential Pressure Sensor compares the pressure from each hose and measures the delta pressure (difference between the inlet and outlet) in the Diesel Particulate Filter.

With the engine running.

The PCM detects excessive pressure at the particulate filter or the (K355) Exhaust Differential Pressure Sensor signal is below the calibrated threshold for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure for that DTC before continuing with this test. Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K354) EXHAUST DIFFERENTIAL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Exhaust Differential Pressure Sensor harness connector. Turn the ignition on. Measure the voltage of the (K354) Exhaust Differential Pressure Sensor 5-Volt Supply circuit in the Exhaust Differential Pressure Sensor harness connector. Is the voltage above 4.8 volts? Yes Go To 3 . No Repair the (K354) Exhaust Differential Pressure Sensor 5-Volt Supply circuit for an open or short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K355) EXHAUST DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the PCM C1 harness connector. Measure the resistance between ground and the (K355) Exhaust Differential Pressure Sensor Signal circuit at the Exhaust Differential Pressure Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (K355) Exhaust Differential Pressure Sensor Signal circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK FOR THE (K355) EXHAUST DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K951) EXHAUST DIFFERENTIAL PRESSURE SENSOR GROUND CIRCUIT Measure the resistance between the (K355) Exhaust Differential Pressure Sensor Signal circuit and the (K951) Exhaust Differential Pressure Sensor Ground circuit at the Exhaust Differential Pressure Sensor harness connector. Is the resistance above 10k Ohms? Yes Go To 5 . No Repair the (K355) Exhaust Differential Pressure Sensor Signal circuit for a short to the (K951) Exhaust Differential Pressure Sensor Ground circuit. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK THE (K355) EXHAUST DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (K355) Exhaust Differential Pressure Sensor Signal circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (K355) Exhaust Differential Pressure Sensor Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. VISUAL INSPECTION OF EXHAUST SYSTEM Turn the ignition off. Visually inspect the Exhaust Differential Pressure Sensor tubes and/or hoses for physical damage, or signs of a leak or restriction at the sensor and exhaust pipe. Visually inspect the entire exhaust system for bent, crushed or otherwise damaged tubes which may cause an exhaust system restriction. Inspect the exhaust system for exhaust leaks. Were any problems found? Yes Repair or replace as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 7 .
7. EXHAUST DIFFERENTIAL PRESSURE SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Connect a jumper wire between the (K354) Exhaust Differential Pressure Sensor 5-Volt Supply circuit and the (K355) Exhaust Differential Pressure Sensor Signal circuit at the Exhaust Differential Pressure Sensor harness connector. Turn the ignition on. With the scan tool, view DTCs. NOTE: The scan tool should display a P244B-Diesel Particulate Filter Differential Pressure Too High DTC as active with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Go To 8 . No Go To 9 .
8. EXHAUST DIFFERENTIAL PRESSURE SENSOR Turn the ignition off. Replace the Exhaust Differential Pressure Sensor. Refer to «SENSOR, DIFFERENTIAL PRESSURE [EXF], REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Turn the ignition on. With the scan tool, erase DTCs in the PCM. Test drive the vehicle With the scan tool, view DTCs in the PCM. Is the status Active for this DTC? Yes Replace the Diesel Particulate Filter. Refer to «FILTER, DIESEL PARTICULATE, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
9. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Differential Pressure Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P244B-DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE TOO HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Diesel Particulate Filter is an in-line canister filter located in the exhaust system between the engine and the muffler. This filter captures and stores soot particles created by the diesel combustion process. As ash and soot accumulate in the filter, the exhaust pressure at the inlet side of the filter increases as compared to the pressure at the outlet side of the filter. This filter is monitored by the Powertrain Control Module (PCM) with a Differential Pressure Sensor. There is a tube at the inlet and outlet of the Diesel Particulate Filter. A hose is attached to each tube. The other end of the hose is connected to the Differential Pressure Sensor. The Differential Pressure Sensor compares the pressure from each hose and measures the delta pressure (difference between the inlet and outlet) in the Diesel Particulate Filter.

With the engine running.

The PCM detects excessive pressure at the particulate filter or the (K355) Exhaust Differential Pressure Sensor signal is above the calibrated threshold for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure before continuing with this test. Ignition on, engine not running. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K355) EXHAUST DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Exhaust Differential Pressure Sensor harness connector. Turn the ignition on. Measure the voltage of the (K355) Exhaust Differential Pressure Sensor Signal circuit in the Exhaust Differential Pressure Sensor harness connector. Is the voltage above 5.0 volts? Yes Repair the (K355) Exhaust Differential Pressure Sensor Signal circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK THE (K951) EXHAUST DIFFERENTIAL PRESSURE SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE Disconnect the PCM C1 harness connector. Measure the resistance of the (K951) Exhaust Differential Pressure Sensor Ground circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K951) Exhaust Differential Pressure Sensor Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. VISUAL INSPECTION Turn the ignition off. Visually inspect the Exhaust Differential Pressure Sensor tubes and/or hoses for physical damage, or signs of a leak or restriction at the sensor and exhaust pipe. Visually inspect the entire exhaust system for bent, crushed or otherwise damaged tubes which may cause an exhaust system restriction. Inspect the exhaust system for exhaust leaks. Were any problems found? Yes Repair or replace as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 5 .
5. EXHAUST DIFFERENTIAL PRESSURE SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Connect a jumper wire between the (K951) Exhaust Differential Pressure Sensor Ground circuit and the (K355) Exhaust Differential Pressure Sensor Signal circuit in the Exhaust Differential Pressure Sensor harness connector. Turn the ignition on. With the scan tool, view DTCs. NOTE: The scan tool should display a P2454-Diesel Particulate Filter Differential Pressure Too Low DTC with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Go To 6 . No Go To 7 .
6. EXHAUST DIFFERENTIAL PRESSURE SENSOR Turn the ignition off. Replace the Exhaust Differential Pressure Sensor. Turn the ignition on. With the scan tool, erase DTCs in the PCM. Test drive the vehicle With the scan tool, view DTCs in the PCM. Is the status Active for this DTC? Yes Replace the Diesel Particulate Filter. Refer to «FILTER, DIESEL PARTICULATE, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
7. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Differential Pressure Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2453-DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Diesel Particulate Filter is an in-line canister filter located in the exhaust system between the engine and the muffler. This filter captures and stores soot particles created by the diesel combustion process. As ash and soot accumulate in the filter, the exhaust pressure at the inlet side of the filter increases as compared to the pressure at the outlet side of the filter. This filter is monitored by the Powertrain Control Module (PCM) with a Differential Pressure Sensor. There is a tube at the inlet and outlet of the Diesel Particulate Filter. A hose is attached to each tube. The other end of the hose is connected to the Differential Pressure Sensor. The Differential Pressure Sensor compares the pressure from each hose and measures the delta pressure (difference between the inlet and outlet) in the Diesel Particulate Filter.

With the engine running.

The Powertrain Control Module (PCM) detects that the Differential Pressure Sensor Signal is implausible or the delta pressure reading is too low.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure for that DTC before continuing with this test. Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE DPF TUBES AND HOSES Ignition off. Inspect the DPF tubes and hoses for leaks, restrictions or damage. Were any issues found with the tubes or hoses? Yes Perform the appropriate repair. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. CHECK FOR HIGH RESISTANCE IN THE (K354) EXHAUST DIFFERENTIAL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the Exhaust Differential Pressure Sensor harness connector. Disconnect the PCM C1 harness connector. Measure the resistance of the (K354) Exhaust Differential Pressure Sensor 5-Volt Supply circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K354) Exhaust Differential Pressure Sensor 5-Volt Supply circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK FOR HIGH RESISTANCE IN THE (K355) EXHAUST DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT Turn the ignition off. Measure the resistance of the (K355) Exhaust Differential Pressure Sensor Signal circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (K355) Exhaust Differential Pressure Sensor Signal circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. CHECK FOR HIGH RESISTANCE IN THE (K951) EXHAUST DIFFERENTIAL PRESSURE SENSOR GROUND CIRCUIT Measure the resistance of the (K951) Exhaust Differential Pressure Sensor Ground circuit between the Exhaust Differential Pressure Sensor harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (K951) Exhaust Differential Pressure Sensor Ground circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. EXHAUST DIFFERENTIAL PRESSURE SENSOR Turn the ignition off. Reconnect the PCM C1 harness connector. Connect a jumper between the (K355) Exhaust Differential Pressure Sensor Signal circuit and the (K951) Exhaust Differential Pressure Sensor Ground circuit in the Exhaust Differential Pressure Sensor harness connector. Turn the ignition on. With the scan tool, select View DTCs. NOTE: The scan tool should display a P2454-Exhaust Differential Pressure Sensor Low DTC with the jumper wire in place. Does the scan tool display the DTC as described above? Yes Replace the Exhaust Differential Pressure Sensor in accordance with the service information. Refer to «SENSOR, DIFFERENTIAL PRESSURE [EXF], REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/exhaust/#exhaust-system) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 7 .
7. DIESEL PARTICULATE FILTER REGENERATION Start and idle the engine. With the scan tool, erase DTCs in the PCM. With the scan tool, perform the Diesel Particulate Filter Regeneration procedure. After this procedure is complete, turn the ignition off for 60 seconds. Test drive the vehicle. With the scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 8 . No Test complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
8. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Differential Pressure Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P245A-EGR COOLER BYPASS CONTROL CIRCUIT/OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Actuator is used to redirect the EGR gases around the cooler when the engine is under certain operating conditions. The EGR Cooler Bypass Valve Actuator is an electronic actuator that controls vacuum supply to the EGR Cooler. It is located underneath the Intake Manifold Assembly. The Powertrain Control Module (PCM) will light a MIL lamp after this monitor runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic passes in four consecutive drive cycles.

With the ignition on.

The PCM detects that the EGR Cooler Bypass Valve Actuator Control circuit is open for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 721

Scheme 722

1. ACTIVE DTC Turn the ignition on. With the scan tool, read DTCs. Is the DTC active? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (F343) ASD RELAY OUTPUT CIRCUIT VOLTAGE Turn the ignition off. Disconnect the EGR Cooler Bypass Valve Actuator harness connector. Turn the ignition on. Measure the voltage on the (F343) ASD Relay Output circuit at the EGR Cooler Bypass Valve Actuator harness connector. Is the voltage equal to battery voltage? Yes Go To 3 . No Repair the (F343) ASD Relay Output circuit for an open or short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (K670) EGR COOLER BYPASS VALVE ACTUATOR CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE Turn the ignition off. Disconnect the PCM C2 harness connector. Measure the resistance of the (K670) EGR Cooler Bypass Valve Actuator Control circuit between the EGR Cooler Bypass Valve Actuator harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (K670) EGR Cooler Bypass Valve Actuator Control circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. EGR COOLER BYPASS VALVE ACTUATOR Turn the ignition off. Disconnect the EGR Cooler Bypass Valve Actuator harness connector. Connect a jumper between ground and the (K670) EGR Cooler Bypass Valve Actuator Control circuit at the EGR Cooler Bypass Valve Actuator harness connector. Turn the ignition on. With the scan tool, view DTCs. Did the P245C-EGR COOLER BYPASS CONTROL CIRCUIT LOW DTC set as active or pending with the jumper in place? Yes Replace the EGR Cooler Bypass Valve Actuator. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 5 .
5. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Cooler Bypass Valve Actuator and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P245B-EGR COOLER BYPASS CONTROL CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Actuator is used to redirect the EGR gases around the cooler when the engine is under certain operating conditions. The EGR Cooler Bypass Valve Actuator is an electronic actuator that controls vacuum supply to the EGR Cooler. It is located underneath the Intake Manifold Assembly. The Powertrain Control Module (PCM) will light a MIL lamp after this monitor runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic passes in four consecutive drive cycles.

With the ignition on.

The PCM detects an over temperature condition on the EGR Cooler Bypass Valve Actuator Control circuit for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC Turn the ignition on. With the scan tool, erase DTCs. Start the engine and test drive the vehicle. With the scan tool, read DTCs. Did the DTC return? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK FOR HIGH RESISTANCE IN THE (K670) EGR COOLER BYPASS VALVE ACTUATOR CONTROL CIRCUIT Turn the ignition off. Disconnect the EGR Cooler Bypass Valve harness connector. Disconnect the PCM C2 harness connector. Measure the resistance of the (K670) EGR Cooler Bypass Valve Actuator Control circuit between the EGR Cooler Bypass Valve Actuator harness connector and the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 3 . No Repair the (K670) EGR Cooler Bypass Valve Control circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. EGR COOLER BYPASS VALVE ACTUATOR Replace the EGR Cooler Bypass Valve Actuator. Turn the ignition on. With the scan tool, erase DTCs. Start the engine and test drive the vehicle. With the scan tool, read DTCs. Did the DTC return? Yes Go To 4 . No Repair complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Cooler Bypass Valve Actuator and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P245C-EGR COOLER BYPASS CONTROL CIRCUIT LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Actuator is used to redirect the EGR gases around the cooler when the engine is under certain operating conditions. The EGR Cooler Bypass Valve Actuator is an electronic actuator that controls vacuum supply to the EGR Cooler. It is located underneath the Intake Manifold Assembly. The Powertrain Control Module (PCM) will light a MIL lamp after this monitor runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic passes in four consecutive drive cycles.

With the ignition on.

The PCM detects that the EGR Cooler Bypass Valve Actuator Control circuit voltage is below the minimum threshold for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 723

1. ACTIVE DTC Turn the ignition on. With the scan tool, read DTCs. Is the DTC active? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K670) EGR COOLER BYPASS VALVE ACTUATOR CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the EGR Cooler Bypass Valve Actuator harness connector. Disconnect the PCM C2 harness connector. Measure the resistance between ground and the (K670) EGR Cooler Bypass Valve Actuator Control circuit at the EGR Cooler Bypass Valve harness connector. Is the resistance below 10k Ohms? Yes Repair the (K670) EGR Cooler Bypass Valve Actuator Control circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. EGR COOLER BYPASS VALVE ACTUATOR Reconnect the PCM C2 harness connector. Turn the ignition on. With the scan tool, read DTCs. NOTE: The scan tool should display a P245A-EGR COOLER BYPASS CONTROL CIRCUIT OPEN DTC should set as active or pending with the connector unplugged. Did the DTC set as described above? Yes Replace the EGR Cooler Bypass Valve Actuator. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 4 .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Cooler Bypass Valve Actuator and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P245D-EGR COOLER BYPASS CONTROL CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Actuator is used to redirect the EGR gases around the cooler when the engine is under certain operating conditions. The EGR Cooler Bypass Valve Actuator is an electronic actuator that controls vacuum supply to the EGR Cooler. It is located underneath the Intake Manifold Assembly. The Powertrain Control Module (PCM) will light a MIL lamp after this monitor runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic passes in four consecutive drive cycles.

With the ignition on.

The PCM detects that the EGR Cooler Bypass Valve Actuator Control circuit voltage is above the maximum threshold for 0.5 second.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 724

1. ACTIVE DTC Turn the ignition on. With the scan tool, read DTCs. Is the DTC active? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. CHECK THE (K670) EGR COOLER BYPASS VALVE ACTUATOR CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the EGR Cooler Bypass Valve Actuator harness connector. Disconnect the PCM C2 harness connector. Turn the ignition on. Measure the voltage of the (K670) EGR Cooler Bypass Valve Actuator Control circuit at the EGR Cooler Bypass Valve harness connector. Is there any voltage present? Yes Repair the (K670) EGR Cooler Bypass Valve Actuator Control circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. EGR COOLER BYPASS VALVE ACTUATOR Turn the ignition off. Reconnect the PCM C2 harness connector. Connect a jumper between ground and the (K670) EGR Cooler Bypass Valve Actuator Control circuit at the EGR Cooler Bypass Valve Actuator harness connector. Turn the ignition on. With the scan tool, view DTCs. NOTE: The scan tool should display a P245A-EGR COOLER BYPASS CONTROL CIRCUIT LOW DTC should set as active or pending with the jumper in place. Did the DTC set as described above? Yes Replace the EGR Cooler Bypass Valve Actuator. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 4 .
4. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Cooler Bypass Valve Actuator and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P253F-ENGINE OIL DETERIORATED

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the engine running.

The engine oil change counter indicates that the engine oil is overdue to be changed. The DPF regeneration is disabled to prevent further oil dilution and the EGR System is disabled.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Turn the ignition off. Change the engine oil and filter in accordance with the service information. With the scan tool, reset the engine oil change counter. View repair. Test Complete Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2610-PCM INTERNAL ENGINE OFF TIMER PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

After ignition is turned off during after-run mode.

The Powertrain Control Module (PCM) detects a PCM off timer error.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, clear DTCs in the PCM. Cycle the ignition key off and on several times, leaving the ignition on for at least two minutes at a time. Start the engine. Perform several engine run cycles, turning the ignition off for at least two minutes between each engine run cycle. With the scan tool, select View DTCs. Did the DTC return? Yes Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P268C-CYLINDER 1 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector 1 value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P268D-CYLINDER 2 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P268E-CYLINDER 3 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P268F-CYLINDER 4 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2690-CYLINDER 5 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2691-CYLINDER 6 INJECTOR DATA INCOMPATIBLE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the Fuel Injector value has not been programmed does not match.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE This DTC will set if the PCM or a Fuel Injector was replaced and the Injector Quantity Adjustment function was not performed. View repair Yes Program the Injector Quantity Adjustment into the Powertrain Control Module. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

P2A00-O2 SENSOR 1/1 CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Powertrain Control Module (PCM) detects that the dynamics of the O2 Sensor signal is too small.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. CHECKING FOR INTAKE SYSTEM LEAK OR RESTRICTION NOTE: This DTC will set due to poor engine performance as well as a faulty O2 Sensor. If the vehicle exhibits any fuel system or driveability issues, or has any other driveability DTCs present, repair those concerns before proceeding with this test. Turn the ignition off. Perform a thorough inspection of the intake system. Look for any leaks or restrictions. Pay special attention to the Charge Air Cooler and hoses. Remove the Mass Air Flow Sensor from the inlet tube. Seal off and/or plug the where the MAF sensor was removed. Connect the smoke machine 84-04 to the intake system where possible and begin injecting smoke into the system. Observe all intake system components for evidence of smoke leakage. Were any leaks or restrictions found? Yes Repair the leak or restriction in the intake system. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 2 .
2. EXHAUST SYSTEM LEAK OR RESTRICTION Perform a thorough inspection of the exhaust system. Look for any leaks or restrictions. Were any leaks or restrictions found? Yes Repair the leak or restriction in the exhaust system. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Go To 3 .
3. POOR EGR SYSTEM PERFORMANCE Perform a thorough inspection of the EGR system. Look for signs of a leak or restriction. Is the EGR system operating properly? Yes Go To 4 . No Repair the EGR System as needed. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. POOR FUEL SYSTEM PERFORMANCE Perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure. Refer to «CHECKING THE FUEL DELIVERY SYSTEM»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#driveability-diesel-non-dtc-based-diagnostics__checking-the-fuel-delivery-system) . Is the fuel system operation normal? Yes Go To 5 . No Repair the fuel system as needed. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. OXYGEN SENSOR Replace the Oxygen Sensor in accordance with the service information. Refer to «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) «SENSOR, OXYGEN, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/fuel-system/#fuel-system) . Reconnect the PCM C1 harness connector. Reconnect the O2 Sensor harness connector. Start the engine. Allow the engine to reach normal operating temperature. It may be necessary to test drive the vehicle to confirm repair. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 6 . No Test Complete. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors the Oxygen Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0101-LOST COMMUNICATION WITH TCM

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Ignition run time is greater than one second.

Battery voltage between 10.0 and 16.0 Volts.

The Powertrain Control Module (PCM) doesn't receive a Bus Message from the Transmission Control Module for approximately two to five seconds.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, select view DTCs. Monitor the scan tool for at least two minutes. Is the status Active for this DTC? Yes Perform the «U0101-LOST COMMUNICATION WITH TCM»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0101-lost-communication-with-tcm) diagnostic procedure . No Perform the «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) diagnostic procedure.

U0103-LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Ignition run time is greater than one second.

Battery voltage between 10.0 and 16.0 Volts.

Bus messages not received from the Electric Gear Shift Module (ESM).

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0103-LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE (ESM)»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0103-lost-communication-with-electric-gear-shift) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0120-LOST COMMUNICATION WITH STARTER/GENERATOR CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The Powertrain Control Module (PCM) doesn't receive a Bus Message from the Generator.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) diagnostic procedure.
2. CHECK THE (D509) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Generator C2 harness connector. Disconnect the PCM C1 harness connector. Remove the ASD Relay. Connect a jumper between terminal 30 and terminal 87. Turn the ignition on. Measure the voltage of the (D509) LIN BUS circuit at the Generator C2 harness connector. Is there any voltage present? Yes Go To 3 . No Repair the (D509) LIN BUS circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (D509) LIN BUS CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove the jumper. Reinstall the ASD Relay. Measure the resistance between ground and the (D509) LIN BUS circuit at the Generator C2 harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (D509) LIN BUS circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (D509) LIN BUS CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (D509) LIN BUS circuit between the Generator C2 harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (D509) LIN BUS circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. GENERATOR Replace the Generator in accordance with the service information. Reconnect the PCM C1 harness connector. Reconnect the Generator C2 harness connector. Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select View DTCs. Did the DTC return? Yes Go To 6 . No Test complete Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0121-LOST COMMUNICATION WITH ABS

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Ignition run time is greater than one second.

Battery voltage between 9 and 16 volts.

Engine run time greater than three seconds.

Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

1. ACTIVE DTC Ignition on, engine not running. With the scan tool, select view DTCs. Is the DTC Active at this time? Yes Refer to «U0121-LOST COMMUNICATION WITH ABS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0121-lost-communication-with-abs) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0122-LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

The Powertrain Control Module (PCM) does not receive a Bus message from the Anti-Lock Brake Module (ABS).

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0121-LOST COMMUNICATION WITH ABS»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-dtcs-p1d4c-to-u1432__u0121-lost-communication-with-abs) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0131-LOST COMMUNICATION WITH ELECTRIC POWER STEERING CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

The battery voltage between 10.0 and 16.0 Volts.

Bus messages not received from the Electric Power Steering Control Module.

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0131-LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE (EHPS)»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0131-lost-communication-with-power-steering-control) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

The battery voltage between 10.0 and 16.0 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0141-lost-communication-with-ipm-fcmtipm) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0146-LOST COMMUNICATION WITH CENTRAL GATEWAY (TIPM)

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

The battery voltage between 10.0 and 16.0 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display active: U0146-LOST COMMUNICATION WITH CENTRAL GATEWAY? Yes Refer to «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0141-lost-communication-with-ipm-fcmtipm) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0155-LOST COMMUNICATION WITH CLUSTER/CCN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

The battery voltage is between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Instrument Cluster (CCN) for approximately two to five seconds.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0155-LOST COMMUNICATION WITH CLUSTER/CCN»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0155-lost-communication-with-clusterccn) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fused installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the HVAC Control Module for approximately two to five seconds.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0164-lost-communication-with-hvac-control-module) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WIN)

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Wireless Ignition Node (WIN) for approximately two to five seconds.

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WIRELESS IGNITION NODE OR WIN)»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-c1008-to-u1158__u0168-lost-communication-with-vehicle-security-control) and perform the diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the diagnostic procedure.

U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the BUS from the Transmission Control Module (TCM).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. TCM COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the TCM at this time? Yes Replace and program the Transmission Control Module (TCM) in accordance with the service information. Refer to «MODULE, TRANSMISSION CONTROL, DESCRIPTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-trans/#transmission-control-module-tcm-electrical-diagnostics) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0405-IMPLAUSIBLE DATA RECEIVED FROM CRUISE CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the BUS from the Adaptive Cruise Control Module (ACCM).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. NOTE: If the scan tool indicates that a flash is available for the ACCM, perform the ACCM flash, erase the DTC in the PCM, and verify that the DTC returns before continuing with this test procedure. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. ACCM COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ACCM at this time? Yes Replace and program the Adaptive Cruise Control Module (ACCM) in accordance with the service information. Perform the ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/cruise-control-systems/#active-cruise-control-acc-module-electrical-diagnostics) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0407-IMPLAUSIBLE DATA RECEIVED FROM GLOW PLUG CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Glow Plug Control Module (GPCM).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Replace and program the Glow Plug Control Module (GPCM) in accordance with the service information. Refer to «MODULE, GLOW PLUG, 3.0L DIESEL [EXF], REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0415-IMPLAUSIBLE DATA RECEIVED FROM ABS

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Anti-lock Brake Module.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. ABS COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ABS Module at this time? Yes Replace and program the Anti-Lock Brake Control Module (ABS) in accordance with the service information. Refer to «MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/anti-locktraction-control/#antilock-brake-system-abs-electrical-diagnostics) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0416-IMPLAUSIBLE DATA RECEIVED FROM ESP

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Anti-lock Brake Module.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. ABS COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ABS at this time? Yes Replace and program the Anti-lock Brake Module (ABS) in accordance with the service information. Refer to «MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/anti-locktraction-control/#antilock-brake-system-abs-electrical-diagnostics) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0424-IMPLAUSIBLE DATA RECEIVED FROM HVAC CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the HVAC Module.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. HVAC COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the HVAC at this time? Yes Replace and program the HVAC Control Module in accordance with the service information. Perform the HVAC VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) . No Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0427-IMPLAUSIBLE DATA RECEIVED FROM VEHICLE SECURITY CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Wireless Ignition Node (WIN).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. WIN COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the WIN at this time? Yes Replace and program the WIN in accordance with the service information. Refer to «RECEIVER, WIRELESS IGNITION NODE, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-body-verification-test) .

U0431-IMPLAUSIBLE DATA RECEIVED FROM IPM (FCM/TIPM)

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Totally Integrated Power Module (TIPM).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. TIPM COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the TIPM at this time? Yes Replace and program the Totally Integrated Power Module (TIPM) in accordance with the service information. Refer to «MODULE, TOTALLY INTEGRATED POWER (TIPM), REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-body-verification-test) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U0452-INVALID DATA RECEIVED FROM RESTRAINTS CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

An error message has been received over the bus from the Occupant Restraint Controller (ORC).

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. ORC COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ORC at this time? Yes Replace and program the Occupant Restraint Controller (ORC) in accordance with the service information. Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/airbag/#occupant-restraint-controller-orc-restraints-system-pre-diagnostic-troubleshooting-procedure-intermittent-test-verificat) . No Replace and program the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

Continuously with the ignition on.

The Powertrain Control Module (PCM) receives a LIN Message error from the Generator.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, erase DTCs in the PCM. Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the «STORED LOST COMMUNICATION DTCS»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) diagnostic procedure.
2. CHECK THE (D509) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Generator C2 harness connector. Disconnect the PCM C1 harness connector. Remove the ASD Relay. Connect a jumper between terminal 30 and terminal 87. Turn the ignition on. Measure the voltage of the (D509) LIN BUS circuit at the Generator C2 harness connector. Is there any voltage present? Yes Go To 3 . No Repair the (D509) LIN BUS circuit for a short to voltage. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
3. CHECK THE (D509) LIN BUS CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove the jumper. Reinstall the ASD Relay. Measure the resistance between ground and the (D509) LIN BUS circuit at the Generator C2 harness connector. Is the resistance above 10k Ohms? Yes Go To 4 . No Repair the (D509) LIN BUS circuit for a short to ground. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
4. CHECK THE (D509) LIN BUS CIRCUIT FOR AN OPEN/HIGH RESISTANCE Measure the resistance of the (D509) LIN BUS circuit between the Generator C2 harness connector and the PCM C1 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (D509) LIN BUS circuit for an open or high resistance. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
5. GENERATOR Replace the Generator in accordance with the service information. Refer to «GENERATOR, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#charging-service-information) . Reconnect the PCM C1 harness connector. Reconnect the Generator C2 harness connector. Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select View DTCs. Did the DTC return? Yes Go To 6 . No Test complete Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
6. POWERTRAIN CONTROL MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the Powertrain Control Module. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) . No Replace the Powertrain Control Module in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

U1432-IMPLAUSIBLE CABIN TEMPERATURE SIGNAL RECEIVED

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously while the system is active.

The Powertrain Control Module (PCM) detects an implausible cabin heater message from the Totally Integrated Power Module (TIPM), or loss of communication over the BUS.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. Ignition on, engine not running. With a scan tool, view DTCs. Is the status Active for this DTC? Yes Go To 2 . No Perform the INTERMITTENT DTC diagnostic procedure. Refer to «INTERMITTENT DTC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .
2. TIPM COMMUNICATION RELATED DTCs IN OTHER MODULES With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the TIPM at this time? Yes Replace the Totally Integrated Power Module in accordance with the service information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-body-verification-test) . No Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#electronic-control-modules-service-information) . Perform the PCM VERIFICATION TEST. Refer to «PCM VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-intermittent-dtc-pcm-verification-test-pcmecmtcm-programming-pre-diagnostic-troubleshooting-procedure) .

See also:
• PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE
• CHECKING THE PCM POWER AND GROUND CIRCUITS
• MODULE, POWERTRAIN CONTROL, REMOVAL
• SENSOR, DIFFERENTIAL PRESSURE [EXF], REMOVAL
• VALVE, EXHAUST GAS RECIRCULATION (EGR) AIRFLOW CONTROL, REMOVAL
• SENSOR, ACCELERATOR PEDAL POSITION, REMOVAL
• CHECKING THE FUEL DELIVERY SYSTEM
• U0101-LOST COMMUNICATION WITH TCM
• STORED LOST COMMUNICATION DTCS
• U0103-LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE (ESM)
• U0121-LOST COMMUNICATION WITH ABS
• U0131-LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE (EHPS)
• U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)
• U0155-LOST COMMUNICATION WITH CLUSTER/CCN
• U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE
• U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WIRELESS IGNITION NODE OR WIN)
• STANDARD PROCEDURE
• STANDARD PROCEDURE
• STANDARD PROCEDURE
• STANDARD PROCEDURE
• STANDARD PROCEDURE
• STANDARD PROCEDURE
• GENERATOR, REMOVAL
• U0121-LOST COMMUNICATION WITH ABS