Service Information

Captiva

DTC B0023

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using the diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC B0023 01: Right Roof Rail Air Bag Deployment Loop Short to Battery

DTC B0023 02: Right Roof Rail Air Bag Deployment Loop Short to Ground

DTC B0023 04: Right Roof Rail Air Bag Deployment Loop Open Circuit

DTC B0023 0D: Right Roof Rail Air Bag Deployment Loop Resistance Above Threshold

DTC B0023 0E: Right Roof Rail Air Bag Deployment Loop Resistance Below Threshold

Diagnostic Fault Information

Circuit	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
Right Roof Rail Air Bag High Circuit	B0023 02	B0023 0D	B0023 04	B0023 01	B0023 0E
Right Roof Rail Air Bag Low Circuit	B0023 02	B0023 0D	B0023 04	B0023 01	B0023 0E

Circuit/System Description

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the right roof rail air bag. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar is used within the right roof rail air bag connector which will short together both high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0023 01

The right roof rail air bag high and/or low circuit is shorted to voltage.

B0023 02

The right roof rail air bag high and/or low circuit is shorted to ground.

B0023 04

The right roof rail air bag high and/or low circuit is open.

B0023 0D

The right roof rail air bag deployment loop resistance is more than 3.54 ohms.

B0023 0E

The right roof rail air bag deployment loop resistance is less than 1.77 ohms.

Action Taken When the DTC Sets

•	The SDM commands the AIR BAG indicator ON via serial data communications.

•	The SIR System is disabled and no deployments are allowed.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

•	A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Circuit/System Testing

Note: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

•	Right roof rail air bag

•

SDM

•	Right roof rail air bag wiring harness connector

•	SDM wiring harness connector

Ignition OFF, disconnect the right roof rail air bag in-line connector.
Disconnect the SDM connector.
Test the high and low circuits between the SDM and right roof rail air bag for a short to voltage, short to ground, short between circuits or open/high resistance. Verify that a short to voltage, short to ground, short between circuits or open/high resistance does not exist.

⇒	If any of the above conditions are found make the appropriate repair.

If all circuits test normal then replace the SDM.
Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0023 is set current.

⇒	Replace the right roof rail air bag.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Roof Side Rail Inflatable Restraint Module Replacement

•	Control Module References for SDM replacement, setup, and programming