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 open or shorted-to-battery. |
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. |
