Circuit Description
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is turned ON the inflatable restraint sensing and diagnostic module (SDM) compares the restraint ID that is stored in the SDM to the restraints ID that is stored in the body control module (BCM). The restraints ID that is being compared to contains the last 4 digits of SDM part number. The SDM receives these messages and compares them to information stored in memory, this DTC is set when the SDM receives a restraints ID over the class 2 communication circuit from the BCM that is different from the ID that is stored in the SDM memory.