Immobilizer System Component Programming
WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
This procedure will learn the immobilizer function and require greater than 15 minutes to complete. If the battery voltage is low, charge the battery before proceeding with the learn. If the body control module (BCM) or engine control module (ECM) have been replaced, they must be programmed before performing this learn procedure.
Depending on the immobilizer function being learned or the component replaced, different learn functions are required to be performed. These learn functions are as follows:
| Function name on SPS tool: | Function description: | When the function should be used: | Notes: |
|---|---|---|---|
| Body Control Module IMMO Function with Existing Transponder or Remote Key | The BCM will relearn the immobilizer passwords and data while reusing the existing vehicle keys | The BCM has been replaced and the existing vehicle keys are being reused or a diagnostic has instructed to perform the learn | - |
| Body Control Module IMMO Function with New Transponder or Remote Key | The BCM will relearn the immobilizer passwords and data while using new vehicle keys | The BCM has been replaced and new vehicle keys are being reused | - |
| Engine Control Module IMMO Learn | The ECM will relearn the immobilizer passwords and data | The ECM has been replaced or a diagnostic has instructed to perform the learn | - |
| Engine Control Module and Body Control Module IMMO Learn | The ECM and BCM will learn new immobilizer passwords and data | Both the ECM and BCM have been replaced (this selection will REQUIRE new vehicle keys be used) | Because both the ECM and BCM have been replaced and are learning new immobilizer passwords and data, all vehicle keys must also be replaced |
| Program Transponder or Remote Key (Add) | A new vehicle key will learn the immobilizer passwords and data | A new vehicle key is being added (does not affect other vehicle keys) | This function may not be available in all sales regions |
| Program Transponder or Remote Key (Delete) | All existing vehicle keys will be invalidated and any desired keys are relearned | All vehicle keys are desired to be invalidated and certain keys relearned or a diagnostic has instructed to perform the learn | This procedure may be used if a customer has had their keys lost or stolen and wishes to invalidate the keys, making them unable to start the vehicle |
- Connect a scan tool to the vehicle and access SPS. Refer to Service Programming System (SPS) .
- Turn ON the ignition, with the engine OFF.
- Ensure that all power consuming devices are turned OFF on the vehicle.
- Select SPS application and follow the on-screen instructions.
- Select Reprogram ECU.
- Select IMMO Immobilizer Learn - Setup.
- Select the appropriate programming function based on the component that was replaced or is being programmed. Refer to the table at the top of this document for assistance in choosing the correct programming function.
- At multiple times during the learn procedure, SPS will instruct you to turn the ignition to the run position. Make sure the vehicle is actually in the run mode before continuing on the SPS terminal. If the igniting is not in the run mode, the learn procedure will fail. To verify the vehicle is in Run mode, verify the green LED is illuminated on the ignition mode switch.
- Depending on the vehicle build date and BCM software level, the method to place the vehicle in the run mode will be different. Early vehicles that have not had the BCM replaced or reprogrammed will require two presses of the igniting mode switch to enter run mode. Late vehicles and vehicles that have had the BCM replaced or reprogrammed require the ignition mode switch be pressed and held for 5 seconds to enter run mode.
- The key pocket is located inside the center console storage area. The key must be placed flat in the pocket with the buttons facing up and the keyring at the rear. If a large keyring prevents the key from laying flat in the pocket, remove the keyring and place the key in the pocket. Failure to position the key flat in the pocket will result in an inability to program.
- Follow the on-screen instructions.
- After programming all keys "Programming Complete" is displayed.
- Press and hold the ignition mode switch for 15 seconds.
- With a scan tool, clear any DTCs.
NOTE: