When the ignition is 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 instrument panel cluster (IPC). The restraints ID being compared contains the last 4 digits of the SDM part number. For more detailed information concerning the class 2 data lines, refer to Data Link Communications Description and Operation .

Ignition voltage is between 9-16 volts.

DTC B1001 is an indication that the restraints ID stored in both the IPC and SDM do not match. If either the IPC or engine control module (ECM)/powertrain control module (PCM) were replaced, the replacement modules needs 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. Ignition ON, with the scan tool, verify that the ECM/PCM is programmed with the correct VIN.

⇒	If the VIN is incorrect, program the correct VIN into the ECM/PCM.

2. Verify that the IPC was not replaced.

⇒	If the IPC was replaced, properly synchronize the new IPC with the SDM.

3. Ignition ON, with the scan tool, clear the DTCs. DTC B1001 should not reset.

⇒	If DTC B1001 resets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SDM and BCM replacement, setup, and programming