Diagnostic Instructions

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

Conditions for Clearing the DTC

Diagnostic Aids

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

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

Special Tools Required

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.

⇒	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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.