4R100

NOTE: Prior to entering pinpoint tests, check the Powertrain Control Module (PCM) wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, proper seals and their condition. Check the PCM, sensors and actuators for damage.

NOTE: If a concern still exists after electrical diagnosis has been performed, refer to Diagnosis by Symptom. 4R100

If codes appear while performing the on-board diagnostics, refer to the Diagnostic Trouble Code Chart for the appropriate procedure. Prior to entering pinpoint tests, refer to any TSBs for transmission concerns. 4R100