Supplemental Inflatable Restraints

DTC B1001 (SDM)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.

DTC Descriptor
DTC B1001 00
- SDM Option Configuration Error

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number, and a secondary data key, which is a portion of the vehicle identification number (VIN). 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.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

* The 4-digit primary data key stored in the SDM does not match the 4 digits stored in the BCM.
* The VIN stored in the BCM is not in the acceptable range of VINs allowed by the SDM calibration.

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-digit Primary Data Key in the SDM match the last 4 digits stored in the BCM.
* The VIN stored in the BCM is in the acceptable range of VINs allowed by the SDM calibration.

Diagnostic Aids

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the BCM was replaced without reprogramming the BCM with the new information.

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.

* SDM
* SDM wiring harness

1. Ignition ON, verify the scan tool Primary Key Status displays Valid.

• If not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key. If the key does not match, perform the Setup SDM Primary Key in BCM procedure.

2. Ignition ON, verify the scan tool Secondary Key Status displays Valid.

• If not the specified value, verify the scan tool received VIN Digits 2-7 match the vehicle VIN.

* If the VIN does not match, reprogram the BCM and perform the Setup SDM Primary Key in BCM procedure.
* If the VIN matches, reprogram the SDM, ensure the correct SDM calibration is used and perform the Setup SDM Primary Key in BCM procedure.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning)for SDM and BCM replacement, setup, and programming