30-Minute Relearn Procedure for TDM or ECM

Use this procedure when learning immobilizer operations in any of the following components:

The theft deterrent module (TDM)
The engine control module (ECM)

IMPORTANT:

This procedure is not available on vehicles equipped with export or Canadian configured TDMs.
When performing the 30-minute relearn procedure, all previously learned keys will be erased from the TDM memory. Additional keys may be learned after performing the relearn procedure.

With a master vehicle key, turn ON the ignition, with the engine OFF.
Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.

IMPORTANT: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to RUN. You must turn the ignition OFF before attempting to start the vehicle.

With a master vehicle key, start the vehicle. The vehicle has now learned the key transponder information and/or the ECM has now learned the fuel continue password.
If additional keys are required to be learned, refer to Adding Keys .
With a scan tool, clear any DTCs.