For 1990-2009 cars

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

### DTC Parameters

• | The ignition is in RUN, START, or ACC.

• | Circuit 1836 shorted-to-ground.

### Diagnostic Aids

• | Check for a poor connection at the BCM. Inspect the harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals, and poor terminal-to-wire connection (terminal crimped over wire insulation and not conductors).

• | Inspect the wiring harness for damage. Check for broken or chaffed insulation.

• | Check for a poor connection at the Passlock sensor.

• | If a fault is suspected to be intermittent, wiggling the harness wiring may help in locating the fault.