Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - U0140-NO BODY BUS MESSAGES
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition on. With the DRBIII®, erase DTCs. Start the engine on and off several times. Leave the engine running for at least 20 second each time. With the DRBIII®, read DTC's. Does the DTC reset? Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION . Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |
| 2 | Turn the ignition on. With the DRBIII®, attempt to communicate with the BCM. Can communication be established with the BCM? Yes --> Go To 3 No --> Refer to the COMMUNICATION CATEGORY and perform the appropriate symptom related to no communication with BCM. Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |
| 3 | Turn the ignition off. Disconnect the PCM harness connector Disconnect the BCM harness connector.
NOTE:
Inspect the PCI Bus terminal at both the PCM connectors and the BCM connectors. Check for corrosion, damage or terminal push out.
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 between the Special Tool #8815 and the BCM harness connector. Is the resistance below 5.0 ohms? Yes --> Replace and program the Powertrain Control Module in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 1 . No --> Repair the PCI BUS circuit for an open. Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |