Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
U0168-NO SKIM BUS MESSAGE DIAGNOSTIC TEST REFERENCE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. With the DRBIII®, read the DTCs and record the related Freeze Frame data. Is the Good Trip Counter displayed and equal to zero? Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION SYMPTOM . Perform SKIS VERIFICATION . |
All |
| 2 | With the DRBIII®, attempt to communicate with the SKIM.
NOTE:
This test will indicate if the bus is operational from the DLC to the SKIM. Was the DRBIII® able to communicate with the SKIM? Yes --> Go To 3 No --> Refer to Symptom BUS +/- SIGNAL OPEN FROM SKIM in COMMUNICATION. Perform SKIS VERIFICATION . |
All |
| 3 | Turn the ignition off. Disconnect the PCM harness connectors. Disconnect the SKIM harness connector.
CAUTION:
DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS. Measure the resistance of the PCI Bus circuit from the SKIM harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes --> Go To 4 No --> Repair the open in the PCI Bus circuit between the PCM and the SKIM. Perform SKIS VERIFICATION . |
All |
| 4 | Connect the PCM harness connectors. Replace the Sentry Key Immobilizer Module in accordance with the Service Information. Ignition on, engine not running. Display and erase all PCM and SKIM DTCs. Perform 5 ignition key cycles leaving the ignition key on for 90 seconds per cycle. With the DRB, display PCM DTCs. Does the DRB display the same DTC? Yes --> Replace and program the Powertrain Control Module per service Information. Perform SKIS VERIFICATION . No --> Test Complete. |
All |