P1C50

P1C50-INCORRECT TRANSMISSION

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Transmission Control Module (TCM) performs basic system checks to ensure proper controller operation. This Diagnostic Trouble Code (DTC) sets if the TCM receives an incorrect transmission configuration bus message from the PCM.

- When Monitored:
Ignition on, with no battery/system voltage DTCs present and not during engine crank.

- Set Condition:
TCM receives an configuration message from the PCM that does not indicate automatic transmission.





Always perform the AW60T Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview.
CHECK TRANSMISSION CONFIGURATION IN THE POWERTRAIN CONTROL MODULE (PCM)
1. Using a scan tool, view the configuration in the PCM.

Does the PCM configuration indicate manual transmission as present?

Yes

- NOTE: The most likely cause of this DTC is the PCM has been replaced and flashed with the wrong software. Once the PCM configuration is set, it cannot be changed. A new PCM will be required.
- Replace and program the PCM. PCM/ECM Reprogramming.
- Perform the AW60T VERIFICATION TEST. AW60T Transmission Verification Test.

No

- Clear TCM DTCs and retest. If the PCM configuration indicates automatic transmission as present, and the TCM resets this DTC, replace and program the TCM. AW60T TCM Programming Procedure.
- Perform the AW60T VERIFICATION TEST. AW60T Transmission Verification Test.