Circuit/System Description

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) applies voltage to the data communication enable circuit when the ignition key is in ACC, ON, or START to enable several modules for bus communication.

Depending on option content, modules that may receive the signal are as follows:

Transfer case control module (TCCM)
Electronic brake control module (EBCM)