DTC B1001. Chevrolet TrailBlazer

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 TrailBlazer - 2WD 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC B1001

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1001: SDM Option Configuration Error

The inflatable restraint sensing and diagnostic module (SDM) stores the vehicles restraint ID from the vehicle identification number (VIN) and the last 4 digits of the SDM part number. When the ignition is turned ON, the SDM compares this information to the information stored in the body control module (BCM) over the serial data communication circuit. If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will set.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

•	The last 4 digits of the SDM part number does not match the last 4 digits stored in the BCM.

•	The VIN stored in the BCM does not match that of the vehicle.

Action Taken When the DTC Sets

•	The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

•	The SDM disables all deployments.

Conditions for Clearing the DTC

•	The last 4 digits of the SDM part number match the last 4 digits stored in the BCM.

•	The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM.

Diagnostic Aids

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the BCM were replaced without correct programming.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Verify that the scan tool BCM VIN Information matches the vehicle VIN.

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

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

⇒	If DTC B1001 is current replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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