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 - PCM MESSAGES NOT RECEIVED
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | With the DRB, erase DTC's. Turn the ignition on and wait approximately 1 minute. With the DRB, read DTC's. Did this DTC reset? Yes --> Go To 2 No --> Refer to appropriate SYSTEM WIRING DIAGRAMS article to help isolate a possible intermittent open or shorted wiring condition. Perform BODY VERIFICATION TEST - VER 1 . |
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| 2 | Turn the ignition on. With the DRB, enter Body Computer, System Tests then PCM Monitor. Does the DRB display: PCM is active on BUS? Yes --> Replace the Body Control Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 3 |
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| 3 | Turn the ignition on. With the DRB, attempt to communicate with the PCM. Was the DRB able to communicate with the PCM? Yes --> Go To 4 No --> Refer to the COMMUNICATION CATEGORY and perform the appropriate symptom. Perform BODY VERIFICATION TEST - VER 1 . |
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| 4 | Turn the ignition off. Disconnect the PCM harness connector.
NOTE:
IF NGC, 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. Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and black test probes. Connect the scope input cable to the channel one connector on the DRB. Attach the red and black leads and the cable to probe adapter to the scope input cable. With the DRBIII®, select Pep Module Tools. Select lab scope. Select Live Data. Select 12 volt square wave. Press F2 for Scope. Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again when complete. Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus circuit in the PCM connector (special tool #8815 if NGC). Turn the ignition on. Observe the voltage display on the DRB Lab Scope. Does the voltage pulse from 0 to approximately 7.5 volts? Yes --> Replace the Powertrain Control Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 5 |
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| 5 | Turn the ignition off. Disconnect the PCM harness connector.
NOTE:
IF NGC, 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. Disconnect the BCM C3 harness connector. Measure the resistance of the PCI bus circuit between the PCM connector (from special tool #8815 if NGC) and the BCM C3 connector. Is the resistance below 5.0 ohms? Yes --> Replace the Body Control Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 . No --> Repair the PCI Bus circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
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