After On-Board Diagnostics

Note: The vehicle wiring harness, and non-transmission sensors may affect transmission operations. Repair these concerns first.

After the on-board diagnostic procedures are completed, repair all DTCs.
Begin with non-transmission related DTCs, then repair any transmission related DTCs. Refer to the On-Board Diagnostic Trouble Code Chart for information on condition and symptoms. This chart will be helpful in referring to the proper 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.