Programming Theft Deterrent System Components (Scan 100): Notes
The theft deterrent system allows for the use of as many as 4 keys for each vehicle. Replacement keys must first be programmed to specific vehicle using the scan tool. This process is completed using serial data communication between the scan tool and the intelligent switching unit (ISU).
Any vehicle keys not programmed during the programming procedure will be inoperative after the programming sequence is completed.
IMPORTANT:
You must obtain all of the keys from the vehicle owner before programming any of the following components:
- Any keys
- Engine control module (ECM)
- Intelligent switching unit (ISU)
- Theft deterrent control module
Between 2-4 transmitters can be programmed to a vehicle's theft deterrent system. A minimum of 2 keys are required to perform the procedure.
Any vehicle keys that are not programmed during the programming procedure will be inoperative after the programming sequence is completed.