Circuit Description
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
When ignition is turned on, SDM compares restraints identification stored in SDM to restraints identification stored in Powertrain Control Module (PCM). SDM then compares Vehicle Identification Number (VIN) stored in SDM to VIN stored in PCM.