Circuit Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The BCM provides the steering column control function which allows the column to be electronically locked or unlocked. The BCM provides three outputs, steering column lock, steering column unlock, and a steering column lock relay control. The BCM can apply a ground or battery output on the steering column lock or steering column unlock depending on the desired steering column lock motor position. The BCM uses the feedback switch in order to monitor the motor position and determine if the commanded position was accomplished.

The BCM controls the position of the steering column lock motor based on the following input information:

Ignition position
Key IN ignition status
Key OUT of ignition status
Steering column lock feedback switch
PASS-Key® system
PCM password information
System voltage

The BCM also monitors its circuitry for the steering column lock circuit. If the BCM detects a malfunction present a DTC will set.