SAAB WIS ONLINE

DTC B0081 (SDM)

DTC B0081 (SDM)

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


DTC Descriptors

DTC B0081 00

Passenger Presence Module Malfunction

DTC B0081 3A

Passenger Presence Module Incorrect Component Installed

Circuit/System Description

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) and the passenger presence module perform tests to diagnose critical malfunctions. Upon a successful power-up mode the SDM will illuminate both PASSENGER AIRBAG ON/OFF indicators. If the SDM detects a fault in the passenger presence module, it may disable the passenger instrument panel air bag deployment loop, set DTC B0081 00 or DTC B0081 3A and illuminate the AIRBAG indicator.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B0081 00

The SDM has received a fault present message from the passenger presence module.

B0081 3A

The SDM has received a message from the passenger presence module indicating a vehicle and passenger presence module mismatch.

Action Taken When the DTC Sets


• The SDM requests the instrument cluster to illuminate the AIR BAG indicator.

• The passenger instrument panel air bag deployment loop will be disabled.


Conditions for Clearing the DTC


• The condition responsible for setting the DTC no longer exists.

• A history DTC will clear once 100 malfunction-free ignition cycles have occurred.


Diagnostic Aids


• If either the SDM or PPS were replaced verify that the correct part numbers were used for the vehicle application.

• If this DTC is set as either current or history it may have been caused by an electronic device. If an electronic device (Computers, MP3 Players, Cell Phones, Diagnostic Scan Tool, etc.) was placed on the passenger seat the passenger presence module may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Make sure there are no objects on the passenger seat and clear the DTCs. If this DTC returns then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.

• If this DTC is set as either current or history it may have been caused by an aftermarket seat heater. The aftermarket seat heater may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Remove the aftermarket seat heater from the passenger seat and clear the DTCs. If this DTC returns then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.


Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference


• Circuit Testing

• Testing for Intermittent Conditions and Poor Connections

• Connector Repairs

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Note
• This system is serviced as a kit (seat foam, module and/or sensing mat). Perform a passenger presence system preload procedure whenever a component is replaced. Refer to Passenger Presence System Programming and Setup .

• Both SDM and passenger presence module set DTC B0081 but with different symptoms bytes. Therefore it is important to identify which module has set the DTC B0081. Use the symptom bytes as a way of identify the correct module to diagnose.



1. Verify that DTC B1001 is not set in the SDM.

2. Verify that DTC B0074, B101D, or B101E is not set in the passenger presence module.

3.
Note

The SDM sets a redundant B0081 00 DTC when the passenger presence module sets a DTC B0081 11 or B0081 4B.


Verify that DTC B0081 00 is not set in the SDM

4.
Note

The SDM sets a B0081 3A when an incorrect passenger presence module is installed.


Verify that DTC B0081 3A is not set in the SDM.

5. All OK.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for passenger presence system and SDM replacement, programming and setup