B0081

CIRCUIT DESCRIPTION

SIR Schematics (Pickup): DLC, Inflatable Restraint Sensing And Diagnostic Module:

SIR Schematics (Utility): DLC, Fuse Block, Inflatable Restraint Sensing And Diagnostic Module:

SIR Schematics (Utility): Side Impact Sensors, Diagnostic Module:

SIR Schematics (30 Series Pickup): Fuse Block, Inflatable Restraint Sensing And Diagnostic Module:

The inflatable restraint side impact sensor (SIS) circuit consists of a side impact sensor (SIS), the SIS signal circuit, and the SIS voltage circuit. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM provides input power to the SIS. When input power is first detected, the SIS responds by performing internal diagnostics. The SIS then sends an ID message to the SDM. The SDM will consider this to be a valid ID if the response time is less than 5 seconds after the SIS is powered up. The SIS will continually communicate a status message to the SDM. The SDM is capable of resetting the SIS by removing and applying power to it.

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

CONDITIONS FOR SETTING THE DTC
^ The SDM has received an ID message from the right SIS which does not match the ID stored in the SDM memory.
^ When two right SIS resets are attempted without the correct identification being detected by the SDM.

ACTION TAKEN WHEN THE DTC SETS
^ The SDM commands ON the AIR BAG indicator via Class 2 serial data.
^ The SDM attempts to reset the right SIS.

CONDITIONS FOR CLEARING THE DTC
^ The condition responsible for setting the DTC no longer exists.
^ You can issue a scan tool CLEAR DTCs command.
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
Verify that the proper right SIS is installed in the vehicle.

TEST DESCRIPTION

Steps 1-4:

The following number refers to the step number in the diagnostic table:
2. Tests the communication status of the right SIS.