Keyless Entry Transmitter: Service and Repair

Transmitter Synchronization

- Resynchronization may be necessary due to the security method used by the remote keyless entry system.
The transmitter does not send the same signal twice to the Body Control Module(BCM).
- The BCM will not respond to a signal that has been sent previously.
This prevents anyone from recording and playing back the signal from the transmitter.
- Resynchronization may be necessary under the following conditions:
- The battery in the transmitter is very weak.
- The battery in the transmitter was replaced.
- The battery in the vehicle has been in a low or no charge condition for an extended period of time.
- In order to resynchronize the transmitter with the BCM, perform the following steps:
0.1 Stand within 1.5 m (5 ft) from the vehicle.
0.2 Simultaneously press and hold the LOCK and UNLOCK buttons on the transmitter for 7 seconds.
0.2 The horn should chirp in order to confirm synchronization.