For 1990-2009 cars

The body control module (BCM) monitors the ignition 1 voltage circuit 39, accessory voltage circuit 43, and the engine run flag (ERF). The ERF is a serial data message from the engine controller.

### DTC Parameters

• | Ignition in RUN position

• | Ignition 1 circuit 39 shorted-to-ground or open

• | Engine run flag present (engine running)

• | All conditions for greater than 30 seconds

### 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.

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