Diagnostic Test

CHECK FOR AN ACTIVE DTC 

1. Turn ignition ON, engine NOT running.
2. Record the Environmental Data for this DTC.
3. With the scan tool, clear the DTC.
4. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC set. It may be necessary to test drive the vehicle.
5. With the scan tool, read ESM DTC's.

   Did the DTC reset?

   Yes 

   • Using the schematics as a guide, check the ESM terminals for corrosion, damage or terminal push out. Pay particular attention to power and ground circuits. Check Service Information Tune-ups or Service Bulletins for possible causes that may apply. If no trouble is found, replace the ESM. Refer to SHIFTER, TRANSMISSION, REMOVAL .
   • Perform the ESM VERIFICATION TEST. Refer to ELECTRONIC SHIFT MODULE (ESM) VERIFICATION TEST .

   No 

   • Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .