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 center of the instrument panel cluster (IPC) 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. The SDM will also set DTC B0092 to notify the driver that the PPS has a current malfunction present. When the SDM detects that the PPS has set any one of the following DTCs, 032, 034, 036, 052, or 056 the SDM will then disable the instrument panel (I/P) module deployment loop, set DTC B0092 and command the AIR BAG indicator ON.
This diagnostic procedure supports the following DTC:
DTC B0092 Passenger Presence System Performance
Ignition 1 voltage is within the normal operating voltage range.
• | The SDM has loss or never established communications with the PPS. |
• | The SDM detects that the PPS has set a DTC. |
• | The SDM disables the I/P 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. |
• | 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. |
DTC B0092 is an indication that the SDM has no or loss communication with the PPS or the PPS has internal faults/DTCs. The SDM will communicate to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the verification ID from the PPS within 5 seconds the SDM will set the DTC as current, illuminate the AIR BAG indicator, and disable the I/P deployment loop.
The numbers below refer to the step numbers on the diagnostic table.
This step checks the PPS for any current or history DTCs.
Test the occupant sensor serial data circuit for an open or high resistance.
Test the PPS ignition 1 voltage circuit for a short to ground, a high resistance, or an open.
Test the PPS ground circuit for an open or high resistance.
Test the PPS ground circuit for a short to voltage.
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 | |||||||
Important: If the PPS has any current or history DTCs stored, you must address the PPS DTCs before continuing with this diagnostic table. Does the PPS flash any current or history DTCs? | Go to Step 3 | ||||||||
3 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 4 | ||||||
4 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 5 | ||||||
Test the occupant sensor serial data circuit for an open or high resistance between the PPS and SDM connector. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 6 | |||||||
Test the PPS ignition 1 voltage circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 7 | |||||||
Test the PPS ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 8 | |||||||
Did you find and correct the condition? | Go to Step 10 | Go to Step 9 | |||||||
9 |
Important: The PPS is a calibrated system. The PPS must be rezero after replacement. Did you complete the replacement? | Go to Step 10 | -- | ||||||
10 |
Does the DTC reset? | Go to Step 2 | System OK |