B1001

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 00
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) 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
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.

Reference Information

Schematic Reference
SIR Schematics [1][2]Air Bag Systems

Connector End View Reference
Component Connector End Views

Description and Operation
SIR System Description and Operation Description and Operation

Electrical Information Reference
- Circuit Testing
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
- Connector Repairs

Scan Tool Reference
Control Module References for scan tool information

Circuit/System Verification

NOTE: Cycle the ignition after performing the Setup SDM Primary Key procedure in the BCM. This enables the BCM to read the new SDM primary Key value.

1. Verify the scan tool SDM Primary Key Status is Valid in the BCM.
2. All OK.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- SIR/SRS Wiring Repairs
- Control Module References for SDM replacement, programming and setup