Power Locks: Testing and Inspection

As a preliminary diagnosis for vehicles with the power lock and Remote Keyless Entry (RKE) systems (high-line version of the Central Timer Module), note the system operation while you actuate both the Lock and Unlock functions with the power lock switches and the RKE transmitter. Then, proceed as follows:
- If the entire power lock system fails to function with either the power lock switches or the REE transmitter, check the fuses in the junction block. Refer to Power and Ground Distribution
- If the power lock system functions with both power lock switches, but not with the RKE transmitter, refer to Remote Keyless Entry Transmitter.
- If the entire power lock system functions with the RKE transmitter, but not with one or both of the power lock switches, see Power Lock Switch.
- If one power lock motor fails to operate with both of the power lock switches and/or the RKE transmitter, see Power Lock Motor.

For computer testing of the Power Door Lock System, refer to Body Control Module, Testing and Inspection.

If the problem being diagnosed involves only the RKE horn chirp or panic mode features, see Horn Relay and/or Headlamp Relay/Testing and Inspection. If both of these relays check OK, further diagnosis should be performed using a DRB scan tool as described in the proper Diagnostic Procedures.