Transmitter Programming (Scan 100): Notes
IMPORTANT:
All transmitters, which are to be recognized by the intelligent switching unit (ISU), must be programmed in a single programming sequence. Up to 4 transmitters can be the programmed to a vehicle's keyless entry system. A minimum of 2 keys are required to perform the procedure. You must obtain all the keys from the vehicle owner before programming any current or new keys. Any vehicle keys not programmed during the programming procedure will be inoperative after the programming sequence is completed. Ensure that the doors, hood and trunk/rear hatch are closed prior to starting the programming procedure. If the system is placed in program mode, then the ISU will erase all previously programmed transmitters upon the receipt of the first transmitter's programming signal. Do not operate or program the transmitters in the vicinity of other vehicles that are also in the keyless entry program mode. This prevents the programming of the transmitters to the incorrect vehicle.
The remote keyless entry (RKE) system allows for the use of as many as 4 transmitters for each vehicle. Replacement remote keyless entry system transmitters 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).