Introduction
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 performing diagnostic
tests to check for proper circuit continuity and for shorts to ground and voltage
within the PPS. If the PPS detects a malfunction, the PPS will set a DTC, communicate
with the SDM that a malfunction has occurred, and request the SDM to disable the
I/P module deployment loop. The SDM will respond by disabling the I/P module deployment
loop, setting either DTC B0092 or B0098 and commanding the AIR BAG indicator
ON. The SDM sets either DTC B0092 or B0098 to notify the driver of a PPS malfunction.
The DTCs that the PPS set are non-Class 2 and have to be flashed through
the PASSENGER AIR BAG ON/OFF indicators located on the inside rear view mirror. The
procedures below are designed to assist in the flashing of these codes. Before you
start, read these procedures carefully and completely. For further information regarding
the PPS refer to
SIR System Description and Operation
.
Passenger Presence System (PPS) Flash Code Procedure
Important: When flashing PPS codes, the instrument panel cluster (IPC) and dash lights
will begin dimming on and off. This is normal operation during the flashing
procedure and does not indicate additional system faults.
- Empty the front outboard passenger seat.
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- With a scan tool, request the passenger presence system (PPS) to flash
DTCs.
- When the PPS receives a valid request to flash DTCs, the PPS will perform
the following:
5.1. | Illuminate both PASSENGER AIR BAG ON and OFF indicators located on the
inside rear view mirror for 1 second. |
5.2. | Turn OFF both PASSENGER AIR BAG ON and OFF indicators for 1 second. |
5.3. | Flash the first number of the DTC using the OFF indicator. Count the number
of times the OFF indicator flashes to obtain the first number of the DTC. |
5.4. | Flash the second number of the DTC using the ON indicator. Count the number
of times the ON indicator flashes to obtain the second number of the DTC. |
5.5. | When the flashing procedure is initiated, the PPS will flash all current
and history DTCs that are stored. After all DTCs have been flashed, to determine if
the DTCs are current or history, the PPS will reflash the DTCs that are stored as
current only. Any DTC that is not reflashed is stored as a history DTC. |
- If the flashing procedure was unsuccessful repeat this procedure. Due
to the communication status between the SDM and the PPS module, this procedure may
have to be repeated until a successful flashing attempt has been achieved.
- Refer to the
Diagnostic Trouble Code (DTC) List
to diagnose the DTCs you have obtained.