B0023

DTC B0023

DTC DESCRIPTOR

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






IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

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 which 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 GMLAN serial data.
- 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.

DIAGNOSTIC AIDS
If there is more than one DTC set diagnose the open DTC first.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the roof rail module - right in-line connector. Then inspect the component and wiring harness sides of the in-line connector for the roof rail module - right for damage or corrosion. Verify there is no damage or corrosion found.
- If the connector for the roof rail module - right is damaged, the roof rail module - right must be replaced.
- If the wiring harness side of the roof rail module - right connector is damaged, replace the harness side of the connector.
2. Use the J 38715-5 adapter to connect the J 38715-A to the harness side of the roof rail module - right in-line connector. Use the PASSENGER INFLATOR connector located on the load tool.
3. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0023 is set in history.
- If DTC B0023 is history replace the roof rail module - right.
4. With the ignition OFF, disconnect and remove both the J 38715-A and adapter. Then remove the SDM connector and inspect the SDM connector for corrosion or damage. Verify there is no damage or corrosion found. Verify there is no damage or corrosion found.

NOTE: Refer to SDM replacement in Control Module References within Computer/Integrating Systems for connector location.

- If damage or corrosion is found make the appropriate repair.
5. Test the high and low circuits between the SDM and roof rail module - right for a short to voltage, short to ground, or open/low resistance.
6. If circuits test good then replace the SDM.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

- Inflatable Restraint Roof Rail Module Replacement - Front
- Control Module References for SDM replacement, setup and programming.