Circuit Description
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) uses a key in ignition input in order to control certain features in the vehicle. These features are in the following systems:
- Content Theft Deterrent, if equipped
- Audible Warnings
- Automatic Door Locks
The BCM detects a key in the ignition when the signal circuit is low.