How to Reset the Security for a 2001 Saturn L200

Iskandar Blogger 4:24 PM

Whenever a Passlock sensor, body control module or powertrain control module are repaired or replaced, you must reset the security system in order for the vehicle to operate properly. GM calls this procedure the vehicle theft deterrent relearn, or VTD relearn. This procedure may also need to be performed if there a break in communication between any of those modules, which can happen if they are removed for another repair. When the VTD relearn is required, the fuel pump will not operate properly; the engine will start, but it will immediately stall. The Tech 2, GMs factory scan tool, is required for this procedure. No aftermarket scan tools can reach the same level of communication with the modules necessary to accomplish the VTD relearn.

Instructions

    1

    Turn off the engine and turn the ignition to the ON position.

    2

    Connect the red Saturn service programming system, or SPS, connector to the data cable on the Tech 2. Connect the Tech 2 to the Saturns diagnostic port under the dashboard.

    3

    Power on the Tech 2 and press enter. Select Service Programming System from the main menu.

    4

    Select Request info, then enter your vehicles information. Wait while the Tech 2 downloads the service programming information from the PCM.

    5

    Connect the serial cable to the Tech 2 and connect the Tech 2 to your computers serial port. Open the TIS2000 program and select Service Programming System.

    6

    Select the options for Tech 2, Reprogram ECU. Choose Vehicle for the ECU location. Click Next and choose Theft Deterrent Relearn. Wait while TIS200 downloads the security reset information to the Tech 2. Disconnect the Tech 2 from your computer once the security information is downloaded.

    7

    Connect the Tech 2 to your vehicle again and choose Service Programming System. Choose the option that says Reprogram ECU. Follow the on-screen instructions on the Tech 2 while it performs the VTD relearn. The Tech 2 will instruct you when to turn the ignition on and off.

    8

    Disconnect the Tech 2 once it states that the relearn is complete. Start the engine and make sure that it runs properly. The security system now properly reset.