Programming Theft Deterrent System Components - Immobilizer

Programming Immobilizer System Components

10-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:

* When performing the 10-minute relearn procedure, all previously learned keys will be erased from the TDM memory. Additional keys may be learned after performing the relearn procedure.

* Use only a master key when performing the first relearn procedure. If a valet key is used first, the TDM will not allow additional keys to be learned.

1. Connect a scan tool to the vehicle.
2. Turn ON the ignition, with the engine OFF.
3. Ensure that all power consuming devices are turned OFF on the vehicle.
4. With a scan tool, select Request Info. under Service Programming System and follow the scan tool on-screen instructions.
5. Disconnect the scan tool from the vehicle and connect the scan tool to a Techline Terminal with the current Service Programming System (SPS) software.
6. On the Techline Terminal, select Service Programming System and follow the Techline Terminal on-screen instructions. Select the VTD Learn for LE5 or LZ9 Powertrain System calibration or the VTD Learn for LNF Powertrain System calibration based on which engine RPO the vehicle is equipped with.
7. Disconnect the scan tool from the Techline Terminal and re-connect the scan tool to the vehicle.
8. With a master vehicle key, turn ON the ignition, with the engine OFF.
9. With a scan tool, select Program ECU under Service Programming System.
10. At this point the scan tool must remain connected for the duration of the 10-Minute Relearn Procedure.

Important:

* The scan tool will initially display 12 Minutes. The first 2 minutes allow the scan tool to initialize the appropriate control module. The remaining 10 minutes is the relearn timer.

* On some vehicles the security indicator may be illuminated on steady for the duration of the 10-Minute Relearn Procedure.

Observe the scan tool. After approximately 10 minutes, the scan tool will display Programming Successful, Turn OFF Ignition. The vehicle is now ready to relearn the key information and/or the passwords on the next ignition switch transition from OFF to CRANK.

11. Turn OFF the ignition and wait 5 seconds.
12. With a master vehicle key, start the vehicle. The TDM has now learned the key transponder information and/or the ECM has now learned the fuel continue password.
13. If additional keys are required to be learned, refer to Adding Keys.
14. With a scan tool, clear any DTCs.

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.

1. With a master vehicle key, turn ON the ignition, with the engine OFF.
2. Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
3. Turn OFF the ignition, and wait 5 seconds.
4. 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.

5. 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.
6. If additional keys are required to be learned, refer to Adding Keys.
7. With a scan tool, clear any DTCs.