Rollover Sensor (ROS)

DTC B1001 (ROS)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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 Error

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a 4-digit primary key for the inflatable restraint vehicle rollover sensor (ROS). The SDM sends the ROS the primary key. If the ROS determines that it is the wrong primary key, the ROS will set DTC B1001 and send the SDM a vehicle mismatch message. The SDM then will set DTC B0090 3A and turn the SIR Warning Indicator ON. The ROS does not use a secondary key.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

The 4-digit primary key stored in the SDM does not match the 4-digit key stored in the ROS.

Action Taken When the DTC Sets

* The SDM commands ON the AIR BAG warning lamp via serial data communications.
* The SDM disables all rollover related deployments.

Conditions for Clearing the DTC

The 4-digit Primary Key in the SDM and in the ROS match.

Diagnostic Aids

This DTC is an indication that the ROS was not set-up correctly, is not the correct part number or that the ROS is defective.

Circuit/System Testing

1. Ignition ON, use the scan tool to request ROS DTC. Verify that DTC B1001 is set as current.

• If DTC B1001 is history, clear codes and recheck.

2. After clearing codes, if DTC B1001 is current, with the scan tool perform the Setup New ROS procedure for the ROS.
3. Ignition ON, use the scan tool to clear the DTC. Verify that DTC B1001 is cleared.

• If DTC B1001 is still current, replace the ROS and with the scan tool perform the Setup New ROS procedure for the ROS.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for ROS replacement, setup, and programming