Diagnostic Test

1) VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

With the scan tool, read active DTCs.

Is this DTC Active?

Yes
1. Go to 2).
No
1. Refer to the Stored Lost Communication test procedure. Refer to DIAGNOSIS AND TESTING .
2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read all active DTCs from all modules.

NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs to the conditions listed above?

Yes
1. Diagnose and repair the DTC. Refer to DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.
No
1. Go to 3).
3) VERIFY THAT THE SHIFT LEVER ASSEMBLY IS ACTIVE ON THE BUS
Turn the ignition on.

With the scan tool, select Network View and select Advanced.

Verify that the Shift Lever Assembly is active on the bus.

Is the Shift Lever Assembly active on the bus?

Yes
1. Go to 4).
No
1. Refer to DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.
4) CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTCs "Logged Against" the Shift Lever Assembly?

Yes
1. Replace/update the Shift Lever Assembly in accordance with the service information.
2. Perform the appropriate VERIFICATION TEST.
No
1. Replace/update the module that set this DTC in accordance with the service information.
2. Perform the appropriate VERIFICATION TEST.