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. |
