Using Diagnostic Equipment

Spare Key Programming - Using Diagnostic Equipment





NOTE: This procedure is used when a customer needs to have an additional key programmed into the vehicle without erasing stored key codes, but does not have 2 programmed keys available. This procedure is also useful when attempting to determine if an ignition key is damaged, as a new key can be installed without erasing keys or without having 2 programmed keys available.

NOTE: Before programming, the new key must have the correct mechanical cut for the ignition lock cylinder.

NOTE: If 8 keys are already programmed, this procedure does not allow any more Passive Anti-Theft System (PATS) keys to be programmed. The number of keys that are programmed into the PATS can be determined by viewing the Instrument Cluster (IC) PID N_KEYCODE.

NOTE: When in the unlimited key mode (after the first 2 keys have been programmed to the vehicle), the N_KEYCODE PID will always read 2, no matter how many keys are programmed to the vehicle.

1. Turn the unprogrammed PATS key from the OFF position to the ON position.

2. From the scan tool, follow the on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to Anti-Theft Security Access Programming and Relearning.

3. NOTE: Make sure the selection made is "PROGRAM". If the "ERASE" selection is made, all of the keys are erased from the system.

From the scan tool menu select: "Program additional ignition key".

4. Turn the key to the OFF position and disconnect the scan tool.

5. Start the vehicle with the new PATS key. The vehicle starts with the new PATS key and also with the original PATS keys.