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DTC 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

Configuration of options

DTC B1001 33

Option configuration - memory error

DTC B1001 45

Option configuration - variant not programmed

DTC B1001 4B

Option configuration - calibration not learned

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 serial data communication. 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

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System 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

Turn the ignition on after performing the setting procedure for the SDM primary keys in BCM. This allows BCM to read the SDM primary key's new value.



1. Verify the diagnostic tool parameter for SDM Primary Key Status is Valid in BCM.

2. If the parameter for SDM's primary key status is invalid

Perform setting of SDM, see Inflatable restraint sensing and diagnostic module, programming and configuration .

3. If the parameter for SDM's primary key status is valid

4. All OK.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.


• SIR/SRS Wiring Repairs

• Control Module References for SDM replacement, programming and setup