Tailgate Cylinder Lock Switch Inoperative

Possible Causes:

• DTC's Present
• Tailgate Switch Ground Circuit Open
• Tailgate Cylinder Lock Switch MUX Wire Open
• Tailgate Cylinder Lock Switch Open
• Body Control Module - Tailgate Cylinder Lock Switch Open

Testing

1. With the DRBIII(R), read DTC's. Are there any Tailgate related codes present? If yes, see POWER DOOR LOCKS/RKE  for related problems. Perform BODY VERIFICATION TEST  . If no, go to next step.
2. Disconnect the Tailgate Cylinder Lock Switch connector. Turn the ignition and all lights off. Measure the resistance between ground and the Tailgate Switch Ground circuit. Is the resistance below 15.0 ohms? If yes, go to next step. If no, repair the Tailgate Switch Ground circuit for an open. Perform BODY VERIFICATION TEST  .
3. Disconnect the Tailgate Cylinder Lock Switch connector. Turn the ignition on. Measure the voltage between ground and the Tailgate Cylinder Lock Switch circuit. Is the voltage above 4.9 volts? If yes, replace the Tailgate Cylinder Lock Switch. See POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS - LIBERTY article for REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST  . If no, go to next step.
4. Disconnect the Tailgate Cylinder Lock Switch connector. Connect a jumper wire between the Tailgate Cylinder Lock Switch MUX circuit in the Lock Motor connector and ground. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Tailgate Cylinder Lock Switch MUX circuit. Is the resistance below 5.0 ohms? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST  . If no, repair the Tailgate Cylinder Lock Switch MUX wire for an open. Perform BODY VERIFICATION TEST  .