B2782

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
When an ignition key is inserted in the ignition switch, the terminals located in the steering column lock cylinder contact the resistor pellet in the key. The IPC measures the resistance of the key pellet and then compares the resistance to the one stored in the IPC memory. If the IPC has been replaced, the new IPC needs to learn the ignition key code value. The IPC learns the first key code value when the ignition is first turned to ON.

CONDITIONS FOR SETTING THE DTC
The IPC does not have a valid key pellet resistance in the memory.

CONDITIONS FOR CLEARING THE DTC
The IPC learns the next valid key pellet resistance and stores the resistance in memory.

ACTION TAKEN WHEN THE DTC SETS
The IPC displays the PROGRAM PASSKEY message on the driver message center.

DIAGNOSTIC AIDS
^ If any other theft deterrent DTCs are also set current, diagnose that DTC first.
^ This DTC sets on replacement IPCs until the first valid key pellet is detected by the IPC.