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DTC B2276: Left Door Lock/Mirror Heater 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. Select LDCM data list on scan tool. Operate power door locks and monitor BATTERY 2 reading. If BATTERY 2 reading does not drop more than 5 volts when door lock/unlock switch is operated, go to next step. If BATTERY 2 reading drops more than 5 volts when door lock/unlock switch is operated, go to step  4 .
  3. Monitor BATTERY 2 reading. Turn on rear defogger to activate heated mirrors. If BATTERY 2 reading does not drop more than 5 volts when door lock/unlock switch is operated, go to DIAGNOSTIC AIDS  . If BATTERY 2 reading drops more than 5 volts when door lock/unlock switch is operated, go to step  5 .
  4. Turn ignition off. Disconnect left door lock actuator connector C3. Turn ignition on. Using DVOM, measure voltage between left door lock actuator connector C3 terminals "A" (Tan wire) and "B" (Gray wire). Press left door lock/unlock switch to LOCK and UNLOCK positions. If battery voltage is not indicated, go to next step. If battery voltage is indicated, go to step  9 .
  5. Disconnect left mirror connector C1. Using DVOM, measure voltage between left mirror connector C1 terminals "B" (Black wire) and "E" (Orange wire). See Figure . Turn on rear defogger to activate heated mirrors. If battery voltage is not indicated, go to step  7 . If battery voltage is indicated, go to step  10 .
  6. Check for short to ground or short to voltage in Gray or Tan wires between LDCM and left door lock actuator. If circuit is okay, go to step  8 . If faulty circuit is found and repaired, go to step  11 .
  7. Check for short to ground or short to voltage in Orange or Black wires between LDCM and left mirror. If circuit is okay, go to next step. If faulty circuit is found and repaired, go to step  11 .
  8. Replace LDCM. See DOOR CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  11 .
  9. Replace left door lock actuator. See DOOR LOCK ACTUATOR  under REMOVAL & INSTALLATION. After repairs, go to step  11 .
  10. Replace left mirror. See POWER MIRRORS - CORVETTE article. After repairs, go to next step.
  11. Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If DTC resets, go to step  2 . If DTC does not reset, repair is complete.
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