B0040

SIR Schematics:

CIRCUIT DESCRIPTION
The inflatable restraint side impact module - LF deployment loop consists of the inflatable restraint side impact module - LF, the side impact module - LF high circuit, and the side impact module - LF low circuit. A shorting bar is used in the inflatable restraint side impact module - LF connector which will short together the side impact module - LF high and side impact module - LF low circuits when the connector is disconnected. This will help prevent unwanted deployment of the side impact module - LF during servicing. When the ignition is turned ON, the Inflatable Restraint Sensing And Diagnostic Module (SDM) performs continuous diagnostic tests on the deployment loop to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, the SDM will store a Diagnostic Trouble Code (DTC).

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
Side impact module - LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
The SDM commands the AIR BAG indicator ON via Class 2 serial data.

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 tree ignition cycles have occurred.

DIAGNOSTIC AIDS
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:
^ A short between the side impact module - LF high and side impact module - LF low circuits
^ The side impact module - LF connector
^ A malfunctioning side impact module - LF
^ The SDM connector
^ An internal SDM malfunction

If an intermittent condition exists, refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-10:

The number(s) below refer to the step number(s) on the diagnostic table.
4. Tests to see if the malfunction is intermittent
5. Tests to see if the malfunction is caused by the side impact module - LF
8. Tests to see if there is a short between the side impact module - LF high and side impact module - LF low circuits