The Passlock sensor is powered by circuit 812. The Passlock sensor is
grounded by circuit 1057. 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 812 is 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. |
