Circuit Description
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 located in the rearview mirror 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. For more detailed information concerning class 2 serial data lines, refer to Data Link Communications Description and Operation in Computer/Integrating Systems.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B0098 Passenger Presence System Configuration Error
Conditions for Running the DTC
Ignition 1 voltage is within the normal operating voltage range.
Action Taken When the DTC Sets
| • | The SDM disables the I/P module deployment loop. |
| • | 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. |
| • | You issue a scan tool CLEAR DTCs command. |
| • | A history DTC will clear once 255 malfunction-free ignition cycles have occurred. |
Diagnostic Aids
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.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Inspects the PPS to make sure the correct part number was installed in the vehicle.
-
Inspects the SDM to make sure the correct part number was installed in the vehicle.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Was the passenger presence system (PPS) replaced? | Go to Step 3 | Go to Step 4 |
Inspect the PPS to make sure that the correct part number was installed in the vehicle. Was the correct PPS part number installed in the vehicle? | Go to Step 4 | Go to Step 6 | |
4 | Was the inflatable restraint sensing and diagnostic module (SDM) replaced? | Go to Step 5 | Go to Step 6 |
Inspect the SDM to make sure that the correct part number was installed in the vehicle. Was the correct SDM part number installed in the vehicle? | Go to Step 6 | Go to Step 8 | |
6 | Replace the PPS. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 8 | System OK |
8 | Replace the SDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
