B0023

DTC B0023

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 provide an overview of each diagnostic category.

DTC Descriptors

DTC B0023 01
- Right Roof Rail Deployment Loop Short to Battery

DTC B0023 02
- Right Roof Rail Deployment Loop Short to Ground

DTC B0023 04
- Right Roof Rail Deployment Loop Open Circuit

DTC B0023 0D
- Right Roof Rail Deployment Loop Resistance Above Threshold

DTC B0023 0E
- Right Roof Rail Deployment Loop Resistance Below Threshold

Diagnostic Fault Information






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 roof side rail module. 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 used within the roof rail module connector will short together both roof rail module - right high and low circuits when the connector is disconnected; this will help to prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0023 01

The roof rail module - right high and/or low circuit is short to voltage for 120 milliseconds.

B0023 02

The roof rail module - right high and/or low circuit is short to ground for 120 milliseconds.

B0023 04

The roof rail module - right high and/or low circuit is open for 120 milliseconds.

B0023 0D

The roof rail module - right deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B0023 0E

The roof rail module - right deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

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.

Special Tools

* J38715-A Driver and Passenger SIR Load Tool
* J-38715-30A SIR Load Tool Adapter

Circuit/System Testing

Important: Refer to SIR Service Precautions.

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

* The front end sensor.

* The SDM module

* The front end sensor wiring harness connector.

* The SDM wiring harness connector.

1. 1. Ignition OFF, disconnect the harness connector at the right roof rail inflatable restraint module.
2. 2. With the J-38715-30A SIR load tool adapter, connect J38715-A in place of the right roof rail inflatable restraint module.
3. 3. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.

• If DTC is not set or is set as history, replace the right roof rail inflatable restraint module.

4. Ignition OFF, disconnect J38715-A and the J-38715-30A SIR load tool adapter.
5. Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1 volt between the right roof rail inflatable restraint module low control circuit terminal A and ground.

• If not within the specified range, test the circuit for a short to voltage.

7. Ignition OFF, test for infinite resistance between the right roof rail inflatable restraint module high control circuit terminal B and ground.

• If not within the specified range, test the circuit for a short to ground.

8. Test for less then 1 ohm between the right roof rail inflatable restraint module high control circuit terminal B and the SDM terminal 10.

• If not within the specified range, test the circuit for an open/high resistance.

9. Test for less then 1 ohm between the right roof rail inflatable restraint module low control circuit terminal A and the SDM terminal 11.

• If not within the specified range, test the circuit for an open/high resistance.

10. If all circuits test normal, replace the SDM.

Repair Instructions

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

* Roof Side Rail Inflatable Restraint Module Replacement
* SIR/SRS Wiring Repairs