Jeep Liberty KJ. Manual — part 634
4.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs “Logged Against” the SKREEM (WCM)?
Yes
>> Replace/update the SKREEM (WCM) in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Replace the PCM in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
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ENGINE ELECTRICAL DIAGNOSTICS
KJ
U110C-NO FUEL LEVEL BUS MESSAGE RECEIVED
For a complete wiring diagram Refer to Section 8W.
KJ
ENGINE ELECTRICAL DIAGNOSTICS
9 - 595
•
When Monitored:
Ignition on.
•
Set Condition:
When the PCM does not receive a fuel level signal from the BCM over the CAN C circuit. The circuit is con-
stantly monitored. One Trip fault.
Possible Causes
CAN C BUS CIRCUIT OPEN OR SHORTED
BODY CONTROL MODULE
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING) .
Theory of Operation
The BCM sends the fuel level signal the NGC over the CAN C bus circuit.
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With the scan tool read Powertrain DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE ALSO ACTIVE
With the scan tool read DTCs.
Is the U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE also set?
Yes
>> Follow the diagnostics for U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
KJ
U110E-LOST AMBIENT TEMPERATURE MESSAGE
For a complete wiring diagram Refer to Section 8W.
KJ
ENGINE ELECTRICAL DIAGNOSTICS
9 - 597
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