Left Cylinder Lock Switch Short To Ground

Monitored & Set Condition

1. When Monitored: With ignition On.
2. Set Condition: When the BCM detects a voltage of less than .25-volts on the Left Cylinder Lock Switch MUX input for over 5 seconds, this code will set. The normal voltage on the circuit os between .25 and 5-volts depending on switch position.

Possible Causes:

• BCM - Left Cylinder Lock Switch Circuit Short To Ground
• Code Active
• Left Cylinder Lock Switch Wire Short To Ground
• Left Cylinder Lock Switch - Shorted

Testing

1. Turn the ignition on. With the DRBIII(R), erase DTC's. Operate the door locks several times from both cylinder lock switches With the DRBIII(R), read DTC's. Does the DRBIII(R) display LEFT CYLINDER LOCK SWITCH SHORT TO GROUND? If yes, go to next step. If no, problem is intermittent and not present at this time. Inspect the wiring and connectors and repair as necessary. Perform BODY VERIFICATION TEST  .
2. Turn the ignition off. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Left Cylinder Lock Switch MUX circuit. Is the resistance below 1000 ohms? If yes, go to next step. If no, replace the Body Control Module. Perform BODY VERIFICATION TEST  .
3. Turn the ignition off. Disconnect the Body Control Module C2 connector. Disconnect the Left Cylinder Lock Switch connector. Measure the resistance between ground and the Left Cylinder Lock Switch MUX circuit. Is the resistance below 1000 ohms ohms? If yes, repair the Left Cylinder Lock Switch wire for a short to ground. Perform BODY VERIFICATION TEST  . If no, replace the Left Cylinder Lock Switch. See POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS - LIBERTY for REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST  .