Tailgate 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 Tailgate Cylinder Lock Switch MUX input for over 5 seconds, this code will set. The normal voltage on the circuit is between .25 and 5-volts depending on switch position.

Possible Causes:

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

Testing

1. Turn the ignition on. With the DRBIII(R), erase DTC's. Lock and unlock the tailgate several times from the tailgate cylinder lock switch. With the DRBIII(R), read DTC's. Does the DRBIII(R) display TAILGATE 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 Tailgate 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 Tailgate Cylinder Lock Switch connector. Measure the resistance between ground and the Tailgate Cylinder Lock Switch MUX circuit. Is the resistance below 1000 ohms? If yes, repair the Tailgate Cylinder Lock Switch wire for a short to ground. Perform BODY VERIFICATION TEST  . If no, replace the Tailgate Cylinder Lock Switch. Perform BODY VERIFICATION TEST  .