SIR System - DTC B1001 Revision

File In Section: 09 - Restraints

Bulletin No.: 99-09-41-001

Date: February, 1999

SERVICE MANUAL UPDATE

Subject:
Revised DTC B1OO1, Option Configuration Error

Models:
1999 Buick Century, Regal





This bulletin is being issued to revise the DTC B1001, Option Configuration Error in the SIR sub-section of Restraints in the Service Manual.

Please use the following to replace the existing information in the Service Manual.

Circuit Description

When the ignition key is first turned to the RUN position, the inflatable restraint sensing and diagnostic module (SDM) compares the restraints ID that is stored in the SDM to the restraints ID that is stored in the BCM. The restraints ID that is being compared contains the last four digits of the SDM part number. Next, the SDM compares the VIN that is stored in the SDM to the VIN that is stored in the BCM. For more detailed information concerning the Class 2 data lines, refer to Data Link Communications Circuit Description in Data Link Communications.

Conditions for Setting the DTC

^ Ignition 1 voltage is within the normal operating voltage range.

^ The restraints ID that is stored in the SDM does not match the restraints ID that is stored in the BCM or the VIN information that is stored in the SDM does not match the VIN information that is stored in the BCM.

This test is only run once during power up initialization.

Action Taken When the DTC Sets

^ The SDM sets a DTC B1001.

^ The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.

^ The SDM disables all deployments.

Conditions for Clearing the DTC

The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM and the VIN information that is stored in the SDM matches the VIN information that is stored in the BCM.

Diagnostic Aids

DTC B1001 is an indication that the restraints D's stored in both the BCM and SDM do not match or that the VIN's stored in both the BCM and SDM do not match. If either the BCM and/or PCM were replaced, the replacement modules need to be reprogrammed for proper operation.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

2. This step checks to see if the correct VIN is programmed in the powertrain control module (PCM).

4. This step checks to see if the body control module (BCM) has been replaced.

5. This step explains the proper steps to perform after a BCM has been replaced in order for the BCM to operate properly.

6. This step checks to see if the correct VIN is programmed in the BCM.

7. This step explains how to properly program the VIN into the BCM.