When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode, the SDM will establish communication with the passenger presence system (PPS). The PPS will respond by commanding both the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The SDM will transmit a request message to the PPS to receive the PPS verification ID. The PPS will transmit the verification ID to the SDM and the SDM will compare the ID received to data stored in memory. If the data stored in memory does not match the information transmitted by the PPS, the SDM will set DTC B0098 and command the AIR BAG indicator ON. The PPS will set DTC 064 and request the SDM to disable the instrument panel (I/P) module deployment loop.

Ignition 1 voltage is within the normal operating voltage range.

Important: DTC B0098 will also set if the PPS has a current malfunction and has set DTC 064. The SDM will set DTC B0098 as current and command the AIR BAG indictor ON. This is done to notify the driver of any PPS malfunctions. When DTC B0098 is present it is important to check the PPS for any current DTCs. Refer to Passenger Presence System Flash Code Procedures . If the PPS has any current DTCs, address these before performing this DTC chart.

DTC B0098 is an indication that the SDM has received an incorrect PPS verification ID. The SDM will continue to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the correct verification ID from the PPS within 5 seconds, the SDM will set DTC B0098 as current, illuminate the AIR BAG indicator, and disable the I/P module deployment loop. If either the SDM or PPS were replaced, make sure the correct part numbers were used for the vehicle application.

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

1. Verify that the vehicle has the correct PPS and SDM installed.

⇒	If an incorrect PPS or SDM has been installed, replace the incorrect component and perform the programming procedure for that component.

2. If the correct components are installed and DTC B0098 is set as a current DTC, replace the PPS.

⇒	Replace the PPS and rezero the system.

3. If after replacement of the PPS, DTC B0098 is set as current, replace the SDM.

⇒	Replace the SDM and perform the SDM Setup procedure.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.