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 B2252: LEFT KEY CYLINDER FAULTTESTING
2001 Chevrolet Cavalier LS, 2.4 T
DTC B2252: Left Key Cylinder 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 .
- Using scan tool, monitor LDCM inputs. Display DOOR KEY UNLOCK SWITCH status. If scan tool indicates DOOR KEY UNLOCK SWITCH status as INACTIVE, go to next step. If scan tool does not indicate DOOR KEY UNLOCK status as INACTIVE, go to step 4 .
- Insert key and rotate door lock key switch to UNLOCK. Monitor scan tool. If DOOR KEY UNLOCK SWITCH status does not change when switch is rotated, go to next step. If DOOR KEY UNLOCK SWITCH status changes when switch is rotated, go to DIAGNOSTIC AIDS .
- Turn ignition off. Remove door panel. Disconnect left door key switch connector. Monitor DOOR KEY UNLOCK SWITCH status. If scan tool does not indicate DOOR KEY UNLOCK SWITCH status as INACTIVE, go to next step. If scan tool indicates DOOR KEY UNLOCK SWITCH status as INACTIVE, go to step 7 .
- Check for short to ground in Light Green wire between LDCM connector C1 terminal No. 13 and left door key switch. See Figure . If faulty circuit is found and repaired, go to step 10 . If circuit is okay, go to next step.
- Check for intermittent connections at LDCM. If circuit is okay, go to next step. If faulty connections are found and repaired, go to step 10 .
- Check for intermittent connections at left door key switch. If connections are okay, go to step 9 . If faulty connections are found and repaired, go to step 10 .
- Replace LDCM. See DOOR CONTROL MODULE under REMOVAL & INSTALLATION. After repairs, go to step 10 .
- Replace left door key switch. See DOOR LOCK CYLINDER under REMOVAL & INSTALLATION. 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. 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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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.