For 1990-2009 cars

## DTC B1001 ROS

### 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 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 illuminate the SIR Warning Indicator. 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 requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

• | 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.

### 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

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.

• | ROS

• | ROS wiring harness

1. Verify the correct ROS part number has been installed

⇒ | If the wrong ROS part number was installed, replace with the correct ROS.

2. Verify that DTC B1001 is not set in the ROS.

⇒ | If DTC is set, perform the Setup New ROS procedure. If DTC resets replace the ROS.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | SIR/SRS Wiring Repairs

• | Control Module References for ROS replacement, setup, and programming

## DTC B1001 SDM

### 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: SDM Option Configuration Error

### Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores the vehicles restraint ID from the vehicle identification number (VIN) and the last 4 digits of the SDM part 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

Ignition voltage is between 9-16 volts.

### Conditions for Setting the DTC

• | The last 4 digits of the SDM part number does not match the last 4 digits stored in the BCM.

• | The VIN stored in the BCM does not match that of the vehicle.

### Action Taken When the DTC Sets

• | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning indicator.

• | The SDM disables all deployments.

### Conditions for Clearing the DTC

• | The last 4 digits of the SDM part number match the last 4 digits stored in the BCM.

• | The restraints ID that is stored in the SDM matches the restraints ID that is 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

• | Connector Repairs

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Testing

1. Ignition ON, verify that DTC B1001 is set as current.

⇒ | If DTC B1001 is history, clear DTCs and recheck.

2. Using the scan tool check the BCM that is programmed with the VIN. Verify that the BCM is programmed with the correct VIN number with the vehicle VIN plate.

⇒ | If the BCM has the wrong VIN number refer to Control Module References for programming and setup.

3. Using the scan tool perform the Setup SDM Part Number into BCM procedure.
4. Ignition ON, verify that DTC B1001 is not set.

⇒ | If DTC B1001 is reset, replace the SDM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | SIR/SRS Wiring Repairs

• | Control Module References for SDM or BCM replacement, setup, and programming