Keyless Entry: Testing and Inspection

CONDITION
When trying to program the receiver module in the vehicle with a new transmitter and there is no response from the module, Example: the door locks do not cycle through a lock/unlock routine. Refer to Diagrams for a block wiring diagram.

REPAIR
1. Be sure that the module has a battery feed from the 30 Amp breaker in cavity 1 of the black connector. Also affected would be the optical horn and the stop lamps.
2. Be sure that the module has an ignition feed from 5 Amp fuse in cavity 8 of the black connector. Also affected would be the body computer, instrument cluster and message center.
3. Be sure that the module has a ground from the right side cowl behind the body computer to the cavity 5 of the black connector.
4. Be sure that you are supplying a good ground to the programming wire.
5. If the above circuits are good, replace the Receiver Module.



CONDITION
Doors can be locked or unlocked with the Keyless Entry transmitter. But the doors will not lock. The Vehicle Theft Alarm system will not arm, when using only the power door LOCK switch In the driver's door.

REPAIR STEPS
1. Be sure you have not left the ignition key in the ignition column lock cylinder.
2. If step 1 is OK, check the Key in Lock switch circuit in the steering column for a short to ground.
3. In this problem the body computer controls the LOCK function. Be sure that it is providing a battery voltage output to the door lock relay. The door lock relay controls the door lock motors.



CONDITION
Doors will lock but Vehicle Theft System will not arm when using the transmitter.

REPAIR STEPS
1. The Keyless Entry Receiver Module controls the door lock signal to the door lock relay. The door lock relay controls the door lock motors. Check for battery voltage at cavity 10 of the Theft Alarm module from the Receiver module.
2. If voltage is OK, replace Receiver module.



CONDITION
All doors except driver's door will lock with the transmitter.

REPAIR STEPS
1. Test the driver's door output of the Receiver Module for a ground.
2. If there is no ground at the pin, replace the Receiver module.
3. If there is a ground at the output, replace the door lock motor.



CONDITION
Only driver's door will lock with the transmitter.

REPAIR STEPS
1. Repair ground circuit to unlock relay
2. Replace unlock relay



CONDITION
Doors do not lock with the transmitter, but still get horn CHIRP that indicates that they did lock.

REPAIR STEPS
^ Replace Receiver module.



CONDITION
Doors will lock with the transmitter but there is no horn CHIRP.

REPAIR STEPS
1. Press horn button, listen horn sound.
2. If the horn sounded, change horn relay.
3. Still no CHIRP, check continuity between the horn relay and the receiver output pin. Repair as necessary.
4. Still no horn CHIRP, replace the receiver module.