System Operation

INTRODUCTION
Power locks are optional factory-installed equipment on these models. The Remote Keyless Entry (RKE) and illuminated entry systems are included on vehicles equipped with the power lock option. On vehicles equipped with this option, all of the doors can be locked and unlocked electrically by operating the switch on either front door panel, or by operating the Lock and Unlock buttons of the RKE transmitter.

The illuminated entry system turns on the courtesy lamps for a timed interval (about thirty-five seconds), when the power locks are unlocked using the RKE transmitter. The power locks, RKE, and illuminated entry systems operate with battery power supplied independent of the ignition switch.

Following are general descriptions of the major components in the power lock and RKE systems.

SYSTEM OPERATION
Power Lock Switch
The power locks are controlled by a two-way switch mounted in a bezel on the trim panel of each front door. The switch controls the battery feeds to the lock and unlock terminals of the power lock and remote keyless entry module.

The power lock switches cannot be repaired and, if faulty or damaged, the entire switch must be replaced.

Power Lock Motor
In the power lock and Remote Keyless Entry (RKE) systems, the locks are actuated by a reversible motor mounted within each door. The motor direction is controlled by the battery and ground feeds from the power lock and remote keyless entry module.

The power lock motor cannot be repaired and, if faulty or damaged, the entire motor must be replaced.

Circuit Breaker
An automatic resetting circuit breaker in the fuseblock module is used to protect the power lock system circuit. The circuit breaker can protect the system from a short circuit, or from an overload condition caused by an obstructed or stuck lock motor, latch, or lock linkage.

The circuit breaker cannot be repaired and, if faulty, it must be replaced.

Remote Keyless Entry Transmitter
The Remote Keyless Entry (RKE) system transmitter is equipped with two buttons, labeled Lock and Unlock. It is also equipped with a key ring and is designed to serve as a key fob. The operating range of the transmitter radio signal is up to 7 meters (23 feet) from the RKE receiver.

Each transmitter has a different vehicle access code, which must be programmed into the memory of the RKE module in the vehicle in order to operate the RKE system. Refer to the service procedure for Remote Keyless Entry Transmitter Programming for more information.

The transmitter operates on two Duracell DL2016 (or equivalent) batteries. Typical battery life is from one to two years. The transmitter cannot be repaired and, if faulty or damaged, it must be replaced.

Power Lock And Remote Keyless Entry Module
The power lock and Remote Keyless Entry (RKE) module is mounted on the dash panel beneath the instrument panel, above the heater-A/C air distribution duct and between the two defroster outlets. This module contains the RKE receiver, and the RKE and illuminated entry system program logic. The module also performs as a smart relay for the power door lock, RKE, and illuminated entry systems.

The remote keyless entry receiver has a memory function to retain the vehicle access code of at least one, but no more than two transmitters. The receiver is designed to retain the transmitter codes in memory, even if the battery is disconnected.

The module receives inputs from the ignition switch, the power door lock switches, and the side/ rear cargo door jamb switches. It also receives the radio signal input from the remote keyless entry transmitter. In response to those inputs, it is programmed to control outputs to the power lock motors and the courtesy lamp circuits.

The power lock and remote keyless entry module cannot be repaired and, if faulty or damaged, it must be replaced.