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DTC B2238: Left Door Unlock Switch Fault: Testing

WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. If power door systems diagnostic system check has been performed, go to next step. If power door systems diagnostic system check has not been performed, go to POWER DOOR SYSTEMS DIAGNOSTIC SYSTEM CHECK  .
  2. Turn ignition on. Using scan tool, monitor LDCM data list. Display DOOR UNLOCK SWITCH status. If scan tool indicates DOOR UNLOCK SWITCH status as INACTIVE, go to next step. If scan tool does not indicate DOOR UNLOCK SWITCH status as INACTIVE, go to step  4 .
  3. Activate door lock/unlock switch to UNLOCK. Monitor scan tool. If DOOR UNLOCK SWITCH status does not change when switch is pressed, go to next step. If DOOR UNLOCK SWITCH status changes when switch is pressed, go to DIAGNOSTIC AIDS.
  4. Turn ignition off. Remove door panel. Disconnect left door lock/unlock switch connector. If scan tool does not indicate DOOR UNLOCK SWITCH status as INACTIVE, go to next step. If scan tool indicates DOOR UNLOCK SWITCH status as INACTIVE, go to step  7 .
  5. Check for short to ground in Orange/Black wire between LDCM connector C4 terminal No. 15 and left door lock/unlock switch. See Figure . If circuit is okay, go to next step. If faulty circuit is found and repaired, go to step  10 .
  6. Check for intermittent connections at LDCM. If connections are okay, go to step  8 . If faulty connections are found and repaired, go to step  10 .
  7. Check for intermittent connections at left door lock/unlock switch. If connections are okay, go to next step. If faulty connections are found and repaired, go to step  10 .
  8. Replace LDCM. See DOOR CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  10 .
  9. Replace left door lock/unlock switch. See DOOR LOCK/UNLOCK SWITCH  under REMOVAL & INSTALLATION. After repairs, go to next step.
  10. Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Recheck system operation. Recheck for DTCs. If DTC resets, go to step  2 . If DTC does not reset, repair is complete.
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