When the ignition is first turned ON, the inflatable restraint sensing and diagnostic module (SDM) compares the restraints ID stored in the SDM to the restraints ID stored in the body control module (BCM). The restraints ID being compared contains the last four digits of the SDM part number. The SDM then compares the vehicle identification number (VIN) stored in the SDM to the VIN stored in the BCM.

Ignition voltage is between 9-16 volts.

The restraints ID stored in the SDM does not match the restraints ID stored in the BCM, or the VIN information stored in the SDM does not match the VIN information stored in the BCM.

DTC B1001 is an indication that the restraint IDs stored in both the BCM and SDM do not match or that the VINs stored in both the BCM and SDM do not match. If the BCM was replaced, the replacement module will have to be reprogrammed for proper operation.

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Verify that the scan tool BCM VIN information matches the vehicle VIN.

⇒	If the VINs do not match, reprogram the BCM.

2. Perform the SDM Setup SDM Part Number in BCM procedure.
3. With a scan tool, verify DTC B1001 is not set as current.

⇒	If DTC B1001 is current replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.