For 1990-2009 cars

### Circuit Description

Passlock sensor data is supplied to the body control module (BCM) by CKT 1836.

The passlock sensor data supplied to the BCM is in the form of V-codes or voltage codes. When the proper ignition key is turned in the ignition switch, the correct V-code is supplied to the BCM. The BCM responds by sending a serial data password to the engine controller allowing the engine to run.

The security resistor is bypassed under a tamper condition -- possible external magnet applied to sensor. In this mode, a specific V-code is supplied to the BCM. The vehicle will not start in this mode.

### Conditions for Setting the DTC

• | Ignition is in RUN, START or ACC.

• | The passlock data equals stored tamper V-code for 1 second.