Keyless Entry: Description and Operation

INTRODUCTION
Power door locks are optional factory-installed equipment on this model. The Remote Keyless Entry (RKE) system, illuminated entry system and power windows are included on vehicles equipped with the power door lock option.

REMOTE KEYLESS ENTRY
The CTM is compatible with a two button TRW RKE transmitter (keyfob). Two pre-programmed transmitters will be supplied with each vehicle. The CTM is capable of retaining up to four transmitters which can be programmed using the DRB. When a signal encoded with the correct vehicle access code is received and contains a valid message, the CTM will activate the corresponding relay to lock or unlock the doors. When an unlock message is sent, all the doors will unlock, the VTSS will disarm and the illuminated entry will be activated. When a lock message is sent and all the doors are closed, all the doors will lock, the VTSS arming sequence will begin and the illuminated entry will turn OFF.

Horn Chirp
When the doors are locked using the transmitter, a horn chirp will sound to let the customer know the doors were locked. The vehicle will be shipped with this function disabled but may be enabled using the DRB. The duration of the horn chirp can also be changed using the DRB.

SYSTEM OPERATION

Power Lock And Remote Keyless Entry Module
The Power Lock and Remote Keyless Entry (RKE) module is used on models that are not equipped with the optional Vehicle Theft Security System (VTSS). This module is mounted on the inboard side of the left center instrument panel support. The module contains the RKE receiver and the RKE system program logic. The relays for the power door locks, the RKE system, and the illuminated entry system are also integral to this module.

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

This RKE system includes an illuminated entry feature, which turns on the courtesy lamps for a timed interval (about thirty-five seconds), when the power locks are unlocked using the RKE transmitter. This power lock system includes a delay lock feature. With the delay lock feature, if a side or rear door is still open when a lock request is received by the power lock module, the module will automatically cycle all of the power lock motors to lock five seconds after the doors are closed.

The power lock and RKE module receives inputs from the ignition switch, the power door lock switches, and both the side and rear cargo door jamb switches. It also receives the radio signal input from the RKE 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.