B0081

DTC B0081

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC B0081 11
- Passenger Presence Module High Input

DTC B0081 42
- Passenger Presence Module Calibration Not Programmed

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 located in the overhead center console. If the SDM detects a fault in the passenger presence module, it may disable the front passenger air bag deployment loop, set DTC B0081 and illuminate the AIRBAG indicator.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

Any of the following conditions must exist for 5 seconds.

B0081 42

The Passenger Presence Module Rezero procedure has failed. Repeat the procedure.

B0081 11

The passenger presence module has failed the Passenger Presence Module Rezero procedure.

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 for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Reference Information
Description and Operation

SIR System Description and Operation (Description and Operation)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Note: This system allows you to service each component separately (module and/or sensing mat). Perform a passenger presence rezero procedure whenever a component is replaced.

Note: The SDM and passenger presence module can 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. Use the table below in identifying specific module DTC B0081 application and symptom byte that sets with it.





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

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

• If DTC B0081 3A is set in the SDM, replace the K85 passenger presence module.

Note: The SDM sets a B0081 00 DTC when the passenger presence module sets a DTC B0081 11 or B0081 42.

2. Verify that DTC B0081 11 or DTC B0081 42 is not set in the passenger presence module.

• If DTC B0081 11 or DTC B0081 42 is set in the passenger presence module, perform the passenger presence detection system rezero procedure. Refer to Passenger Presence System Rezeroing (Passenger Presence System Rezeroing).

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning) for passenger presence module and SDM replacement, setup, and programming