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.

### Conditions for Setting the DTC

• | Ignition is in RUN, START or ACC.

• | CKT 1836 is shorted-to-ground.

### Diagnostic Aids

• | Check for poor connection at the BCM. Inspect 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 wiring harness for damage. Check for broken or chaffed insulation.

• | Check for poor connection at the passlock sensor.

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