Grand Prix V6-3.8L SC VIN 1 (1997)
Body Control Module: Component Tests and General Diagnostics
Circuit Operation
There are three different types of Body Control Module's (BCM), referred to as types 2, 3, and 4. The BCM-2 provides Illumination Control, Inadvertent
Load Control, Chime/Warning functions, Retained Accessory Power, control of the vehicle's Power Door Locks including Lockout Prevention, Last
Door Closed Locking, Automatic Door Lock, and Automatic Door Unlock functions. The BCM-3 provides the features of MALL-2 subsystems, and
adds functions designed to allow the MALL subsystem to work with a Remote Keyless Entry subsystem. The BCM-4 provides all the functions of the
MALL-2, and MALL-3 subsystems and adds Remote Activation Verification, Remote Alarm, and Content Theft Deterrent System functions.
Shock Sensor Diagnostics
If Shock Sensor Diagnostics is enabled (cycle #6 in the list above), MALL subsystem type 4 will activate the HORN output for a period of 25ms upon
detection of an inactive to active transition on the TAMPER input. MALL subsystem type 4 will activate the HORN output for a period of 100ms upon
detection of an inactive to active transition on the TAMPER input. The technician will be able to test the Tamper input anywhere on the vehicle while in
this cycle.
