Volt

DTC B1001

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.

System voltage is between 9-16 V.

The 4-digit Primary Data Key stored in the SDM does not match the 4 digits stored in the BCM.

The last 4-digit Primary Data Key in the SDM matches the last 4 digits stored in the BCM.

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.

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Verify the scan tool SDM Primary Key Status parameter 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 .

⇓	If the SDM Primary Key Status parameter is Valid

2. All OK.

Perform the Diagnostic Repair Verification after completing the repair.