After On-Board Diagnostics

NOTE: The vehicle wiring harness, Powertrain Control Module (PCM) and non-transmission sensors may affect transmission operations. Repair these concerns first.

After the on-board diagnostic procedures are completed, repair all Diagnostic Trouble Codes (DTCs).

Repair the non-transmission related DTCs first; then repair any transmission related DTCs; refer to Diagnostic Trouble Code Description Chart. This chart is helpful in referring to the proper tests, and aids in diagnosing internal transmission concerns and external non-transmission inputs. The pinpoint tests are used in diagnosing transmission electrical concerns. Make sure that the vehicle wiring harness and the PCM are diagnosed as well.