Key Initialization

The system provides a key initialization procedure in the event all keys programmed into the system have been lost, or only one key was lost and the customer wants to make sure the lost key will no longer start his vehicle.

The vehicle protection system also allows for the reprogramming of the system if the ignition lock assembly requires replacement. This mode requires only one encoded key be programmed before the Passive Anti-theft System (PATS) control module will send the vehicle enable message to the Powertrain Control Module (PCM).

To erase all keys in memory and store an unprogrammed key in memory, perform the following procedures:

^ If a programmed encoded ignition key is available:
(1) Place key in ignition switch and turn to RUN position.
(2) Enter NGS: PATS, ACTIVE COMMAND modes.
(3) Select ignition key-code ERASE ON (within 5 seconds, all key-codes stored will be erased).
(4) Turn ignition switch OFF and then back to RUN to program the first key into memory.
(5) Follow spare key programming procedure for programming any additional keys required.
^ If no programmed keys are available:
(1) Follow the procedure described above; however, instead of taking 5 seconds to complete key erasing, it will take a minimum of 8 minutes.

An alternate programming method is possible and is intended to keep a customer who has no access to a service shop equipped with diagnostic tools from being stranded. This interactive procedure takes approximately 45 minutes to complete to maintain the high level of theft protection provided by the system. When initializing the system using this procedure, it must be followed precisely or the system will abort and the procedure will need to be started over.
^ Insert an unprogrammed encoded key into the ignition lock and turn ignition switch to RUN. The THEFT indicator will begin flashing.
^ Follow this procedure three times: After 15 minutes of flashing, the THEFT indicator will extinguish. Within five minutes after the THEFT indicator has gone out, turn the ignition switch once to OFF for a second, then back to RUN. The THEFT indicator will resume flashing for another 15 minutes.
^ After the third time (at 45 minutes from start), the control module will erase all stored keys and memorize the unprogrammed key as valid. This key will now start the vehicle. Additional keys can be programmed using the Spare Key Programming procedure.