Supplemental Inflatable Restraints

DTC B1001

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category

DTC Descriptor

DTC B1001 00

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Option Configuration

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number. When the ignition is turned ON, the SDM compares this information to the information stored in the body control module (BCM) via the serial data. If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will set.

Conditions for Running the DTC

System 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.

Action Taken When the DTC Sets

* The SDM requests the instrument cluster 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 matches the last 4 digits 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 was replaced without reprogramming the BCM with the new information.

* If the SDM was previously programmed and DTC B1001 is now set, the setup portion of program was not completed. Proceed to the Inflatable Restraint Sensing and Diagnostic Module Setup portion of the Inflatable Restraint Sensing and Diagnostic Module Programming and Setup Testing and Inspection

Reference Information

Schematic Reference

SIR Schematics [1][2]Air Bag Systems

Connector End View Reference

Component Connector End Views Sunshade - Left (DH6)

Description and Operation

SIR System Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

* Connector Repairs Connector Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Verify the scan tool SDM Primary Key Status paramater is Valid.

• If the SDM Primary Key Status parameter is Invalid

Perform the SDM setup. Refer to Inflatable Restraint Sensing and Diagnostic Module Programming and Setup Testing and Inspection.

• If the SDM Primary Key Status parameter is Valid

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* SIR/SRS Wiring Repairs SIR/SRS Wiring Repairs

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