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 of the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The SDM will then 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 or B0092 and command the AIR BAG indicator ON.
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.
Conditions for Setting the DTC
| • | The PPS has lost communications with the SDM. |
| • | The PPS verification ID does not match the ID that is stored in the SDM. |
Action Taken When the DTC Sets
| • | The SDM disables the instrument panel (I/P) module deployment loop. |
| • | The SDM commands the AIR BAG indicator ON via class 2 serial data. |
| • | The PPS will turn ON the PASSENGER AIR BAG OFF indicator. |
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
DTC B0098 and/or DTC 064 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. If either the SDM or PPS were replaced, verify that the correct part numbers were used for the vehicle application.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Inspect the PPS to verify the correct part number was installed in the vehicle.
-
This test checks the PPS data communications circuit for an open or high resistance.
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 | |
2 | Was the passenger presence system (PPS) replaced? | Go to Step 3 | Go to Step 4 |
Inspect the PPS to verify 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 ensure 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 |
Important: The PPS is a calibrated system. The PPS must be rezero after replacement. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 8 | System OK |
8 |
Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
