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. The vehicle does not start until a minimum of 2 keys are programmed into the Instrument Cluster (IC).

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

NOTE: Two PATS encoded (contains a transponder) 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.

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 PID SPAREKEY 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 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" and follow the IDS on-screen instructions.

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

5. Insert the first PATS key into the ignition lock cylinder and turn the key to the ON position for 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 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.