Power Locks: Description and Operation

INTRODUCTION
Power door locks are optional factory-installed equipment on this model. Power windows are included on vehicles equipped with the power door lock option. The Remote Keyless Entry (RKE) system is also an available option on models equipped with power door locks.

Power Lock System
The power lock system allows both doors to be locked or unlocked electrically by operating the switch on either door trim panel. The power lock system operates on non-switched battery current supplied through a fuse in the junction block so that the system remains functional, regardless of the ignition switch position.

Two different power lock systems are offered. Both power lock systems include the power lock switches on each door trim panel, and the power lock motors inside each door. On models without the optional Remote Keyless Entry (RKE) system, the power lock switches are hard-wired directly to the power lock motors, and a base version of the Central Timer Module (CTM) is used.

On models with the optional RKE system, a high-line version of the CTM is used. The high-line CTM incorporates the RKE receiver and logic, power lock control circuitry, and power lock and unlock relays. The power lock switches are hard-wired to the CTM, and the CTM controls the hard-wired output to the power lock motors.

The CTM controls the door lock actuator assemblies to handle locking and unlocking with the key fob or interior switch. There is also a door lock inhibit feature that prevents power locking of the doors if the ignition is OFF and the key is in the ignition. Automatic or rolling locks are included as a DRB programmable feature. If the vehicle is moving approximately 5 mph and approximately degrees of throttle opening is seen by the PCM, (the PCM will send this info to the CTM via the CCD bus) indicating acceleration, the CTM will cycle the lock actuators.

Refer to the owner's manual in the vehicle glove box for more information on the features, use and operation of the power lock system.