After On-Board Diagnostics

After the On-Board Diagnostic procedures are completed, service all DTCs.

Begin with non-transmission-related DTCs, then service any transmission related DTCs. Refer to the Diagnostic Trouble Code Charts in the Diagnosis and Testing portion of this section for information on Condition and Symptoms. This chart will be helpful in referring to the proper manual(s) and to aid in diagnosing internal transmission concerns and external non-transmission inputs. The Pinpoint Tests are used in diagnosing electrical concerns of the transmission. Make sure that the vehicle wiring harness and the powertrain control module (PCM) (12A650) are diagnosed as well. The Powertrain Control/Emissions Diagnosis Manual OBDII will aid in diagnosing non-transmission electronic components.

NOTE: The vehicle wiring harness, powertrain control module and non-transmission sensors may affect transmission operations. Service these concerns first.