Keyless Entry: Testing and Inspection

As a preliminary diagnosis for vehicles with either of the two power lock and Remote Keyless Entry (RKE) systems, 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 RKE transmitter, check the fuses in the fuseblock module.
- If the power lock system functions with both power lock switches, but not with the RKE transmitter, see 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.

If the problem being diagnosed involves only the illuminated entry or delay lock features, see Power Lock and Remote Keyless Entry Module, or see Central Timer Module.

On models equipped with the optional Vehicle Theft Security System (VTSS), if the problem being diagnosed involves only the RKE horn chirp feature, see Horn Relay. If the relay checks OK; or if the problem being diagnosed involves the rolling door locks, door lock inhibit, central locking or enhanced accident response features, further diagnosis of the CTM should be performed using a DRB III scan tool as described in the proper Diagnostic Procedures.