Using Diagnostic Equipment

Key Programming Using Diagnostic Equipment





NOTE: This procedure is used when a customer needs keys programmed into the system and does not have 2 programmed ignition keys available. This procedure is also useful when a programmed ignition key(s) is lost or the ignition lock cylinder is replaced, and it is desired to erase key code(s) from the Passive Anti-Theft System (PATS) memory.

NOTE: This procedure erases all programmed ignition keys from the vehicle memory and the vehicle does not start until 2 keys are programmed to the vehicle. This procedure does not erase the Integrated Keyhead Transmitter (IKT) identification codes (Transmitter Identification Codes (TICs)) from the Generic Electronic Module (GEM).

NOTE: A minimum of 2 PATS keys must be programmed into the Instrument Cluster (IC) before the vehicle starts.

NOTE: Two PATS encoded (contains a transponder) IKT keys (or standard PATS keys) with the correct mechanical cut must be available to carry out this procedure. One or both of them may be the customer's original keys. One or both of them may be an IKT key or a standard PATS key. If the vehicle is not equipped with IKT keys, 2 standard PATS keys are sufficient to complete this procedure.

NOTE: If additional keys are to be programmed, refer to Key Programming Using Two Programmed Keys Using Two Programmed Keys. If the remaining keys are with the customer and are not available with the vehicle, instruct the customer to refer to the Owner's Literature for instructions on programming the remaining keys. In this case, the IC SPAREKEY PID must be enabled.

NOTE: This procedure is not necessary if only the PATS transceiver was replaced. Replacement of the transceiver does not erase the PATS key codes in the IC.

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

2. From the scan tool, enter TOOLBOX. Select BODY - SECURITY - PATS Functions and follow the Integrated Diagnostic System (IDS) on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to Anti-Theft Security Access Anti-Theft Security Access.

3. From the scan tool menu select: "Ignition Key Code Erase". Follow all IDS screen instructions until the key erase procedure completes. The scan tool also instructs to program 2 keys to complete the process.

4. Turn the key to the OFF position and disconnect the scan tool (the key does not need to be removed from the ignition lock cylinder at this time).

5. Turn the first PATS key in the ignition lock cylinder to the ON position for a minimum of 3 seconds.

6. Turn the first PATS key to the OFF position and remove the key from the ignition lock cylinder.

7. Insert the second PATS key into the ignition lock cylinder and turn the key to the ON position for a minimum of 3 seconds.

8. The vehicle should now start with both PATS ignition keys.

9. If it is desired to program additional key(s) (only up to 8 keys total can be programmed into the IC), refer to Key Programming Using Two Programmed Keys Using Two Programmed Keys for each additional key that needs to be programmed.

10. NOTE: Erasing the keys with the scan tool does not erase the RKE transmitter portion of an IKT PATS key (if equipped) on this vehicle. Programming the PATS keys using the scan tool or using the Key Programming Using Two Programmed Keys Using Two Programmed Keys procedure does not program the RKE transmitter portion of the IKT PATS key on this vehicle only.

To program the RKE transmitter portion of an IKT PATS key (if equipped), refer to Doors, Hood and Trunk &/or Locks.