Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 16 (POWER DOOR LOCK SYSTEM)DIAGNOSTIC TESTSDTC B2276: LEFT DOOR LOCK/MIRROR HEATER FAULTTESTING
2001 Chevrolet Cavalier LS, 2.4 T
DTC B2276: Left Door Lock/Mirror Heater Fault: Testing
2001 Chevrolet Cavalier LS, 2.4 TSECTION 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.
- 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 .
- 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 .
- 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 .
- 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 .
- 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 .
- 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 .
- 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 .
- Replace LDCM. See DOOR CONTROL MODULE under REMOVAL & INSTALLATION. After repairs, go to step 11 .
- Replace left door lock actuator. See DOOR LOCK ACTUATOR under REMOVAL & INSTALLATION. After repairs, go to step 11 .
- Replace left mirror. See POWER MIRRORS - CORVETTE article. After repairs, go to next step.
- 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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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.