DTC Descriptors

DTC B0040 : Left Front Side Deployment Loop Resistance Low

DTC B0041 : Left Front Side Deployment Loop Open

DTC B0045 : Left Front Side Deployment Loop Voltage Out of Range

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
Side Impact Module - LF High Circuit	B0045	B0045	B0041	B0045	B0040
Side Impact Module - LF Low Circuit	B0045	B0045	B0041	B0045	B0040

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 side impact module - LF. 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 side impact module - LF connector which will short together both side impact module - LF 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

B0040

The side impact module - LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0041

B0045

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

Important: 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 SDM module

•	The side impact module- LF

•	The side impact module wiring harness

•	The SDM wiring harness connector

•	The side impact module - LF wiring harness connector

•	The side impact module wiring harness connector

1. Ignition OFF, disconnect the side impact module - LF wiring harness connector located under the driver front seat.
2. Use J 38715-60 to connect the J 38715-A to the harness side of the side impact module - LF wiring harness connector. Use the PASSENGER INFLATOR connector located on the load tool.
3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0040, B0041, or B0045 is set history.

⇒	If DTC B0040, B0041, or B0045 is current turn OFF the ignition and remove the SDM connector. Refer to SDM replacement in Repair Instructions for connector location.

⇒	Test and repair both side impact module - LF high and low circuits for a short to voltage, short to ground, or open/low resistance. If all circuits test normal then replace the SDM

4. Ignition OFF, disconnect and remove both the J 38715-A and adapter. Then connect the side impact module - LF wiring harness connector. Remove the side impact module - LF connector. Use J 38715-30A to connect the J 38715-A to the harness side of the side impact module - LF connector. Use the PASSENGER INFLATOR connector located on the load tool.
5. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0040, B0041, or B0045 is set history.

⇒	If DTC B0040, B0041, or B0045 is current, replace the side impact module - LF wiring harness.

6. If DTC B0040, B0041, or B0045 is history, replace the side impact module - LF.

Repair Instructions

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