TCM Messages Not Received

PCM MESSAGES NOT RECEIVED

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

With the ignition on.

- Set Condition:

This DTC will set if the OHC does not receive PCI bus messages from the PCM for 5 seconds. The OHC receives Reverse message from the PCM to provide the Back-Up Lamp Signal to the EC Mirror.





Diagnostic Test

1. P/N SWITCH FAULT OR PCM DTC PRESENT

NOTE: Ensure the PCM communicates on the PCI bus.

NOTE: Diagnose and repair any PCM DTCs before proceeding with this test.

Turn the ignition on, engine not running.

With the scan tool, monitor the Park/Neutral Position Switch input state.

Move the gear selector through all gear positions.

Does the DRBIII(R) display Park/Neutral and Drive/Reverse in the correct gear positions?

Yes

- With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, then turn the ignition on. With the scan tool, read DTCs. If this code resets, replace the Overhead Console.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Refer to symptom *CHECKING PARK/NEUTRAL SWITCH OPERATION.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test