Before Pinpoint Tests

Note: Prior to entering pinpoint tests, check the powertrain control module wiring harness for correct connections, bent or broken pins, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM, sensors and actuators for damage.

Note: If a concern still exists after electrical diagnosis, refer to Diagnosis by Symptom. 5R55N

If DTCs appear while carrying out the on-board diagnostics, refer to the Diagnostic Trouble Code Chart for the appropriate repair procedure. Prior to entering pinpoint tests, refer to any TSBs for transmission concerns.