When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The PPS is used to monitor the weight of an occupant in the front passenger seat. If the pressure from the occupant's weight is less than a specified value or an empty seat is detected, the PPS module will send a suppress signal to the SDM to disable the instrument panel (I/P) module. When the PPS detects a fault within itself, then the PPS will communicate to the SDM through GMLAN communications that a PPS fault is present. The SDM will suppress the deployment of the module and then turn the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

This DTC is set when the SDM has commanded an air bag deployment while the PPS has determined that the front passenger seat has one the following conditions:

This code will set along with one of the following latched codes: DTC B0052, B0053, or B0055 and cannot be cleared.

This code set because the PPS commanded to suppress the I/P module when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

1. Ignition OFF, verify that the vehicle does not show any signs of inflator module or pretensioner deployment.

⇒	If the vehicle displays any signs of inflator deployment, refer to Repairs and Inspections Required After a Collision .

2. With a scan tool, verify DTC B0052, B0053, or B0055 is not set.

⇒	If DTC is set , refer to Diagnostic Trouble Code (DTC) List - Vehicle .

3. With a scan tool, clear DTCs, verify DTC B0056 is not set.

⇒	If DTC is set , replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

SIR/SRS Wiring Repairs