After On-Board Diagnostics
NOTE: The vehicle wiring harness, powertrain control module and non-transmission sensors may affect transmission operations. Repair these concerns first.
After the on-board diagnostic procedures are completed, repair all DTCs.
Repair the non-transmission related DTCs first; then repair any transmission related DTCs. refer to Diagnostic Trouble Code (DTC) Description Chart. This chart is helpful in referring to the correct 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.