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Diagnostic Procedure

  1. Did you perform the diagnostic system check? If so, go to next step. If not, see DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Install a scan tool. Turn the ignition switch to the ON position. With a scan tool, command the shift lock solenoid ON and OFF. Does the shift lock solenoid turn ON and OFF with each command? If so, check for an intermittent condition. See SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING. If not, go to next step.
  3. Turn ignition switch to the OFF position. Disconnect the shift lock solenoid. Connect a test light between the shift lock solenoid voltage supply circuit (Dark Green/White wire) and the shift lock solenoid control circuit (Tan/White wire) at the shift lock solenoid. Turn the ignition switch to the ON position. With a scan tool, command the shift lock solenoid ON and OFF. Does the test light turn ON and OFF with each command? If so, go to step  5 . If not, go to next step.
  4. Test the shift lock solenoid control circuit (Tan/White wire) for a short to voltage. Did you find and correct the condition? If so, go to step  9 . If not, go to step  6 .
  5. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step  9 . If not, go to step  7 .
  6. Check the BCM for poor connections. Did you find and correct the condition? If so, go to step  9 . If not, go to step  8 .
  7. Replace the shift lock solenoid. See SHIFT LOCK SOLENOID  under REMOVAL & INSTALLATION. After repairs, go to step  9 .
    8. NOTE: Perform the set up procedure for the BCM.
  8. Replace the BCM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repairs, go to step  9 .
  9. Use the scan tool in order to clear the DTCs. Road test the vehicle within the CONDITIONS FOR SETTING DTC  . Does the DTC reset? If so, go to step  2 . If not, system is okay.
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