B0081

DTC B0081

Diagnostic Instructions

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



DTC Descriptors
DTC B0081 0F
- Passenger Presence System Erratic

DTC B0081 39
- Passenger Presence System Internal Electronic Failure

DTC B0081 3A
- Passenger Presence System Incorrect Component Installed

DTC B0081 71
- Passenger Presence System Invalid Serial Data Received




Circuit/System Description

When the ignition is turned ON, the passenger presence system (PPS) and 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 PPS. The SDM will also request the instrument panel cluster to command both of the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. If the SDM detects that the PPS has set a current DTC, the SDM will then disable the instrument panel (I/P) module deployment loop, set DTC B0081, and command the AIR BAG indicator ON.


Conditions for Running the DTC

Ignition voltage is between 9-16 volts.


Conditions for Setting the DTC

All of the following conditions must exist for 5 seconds:





B0081 0F
* The SDM has received a fault present message from the PPS.
* The PPS is in assembly plant mode and the SDM is in production mode.


B0081 39

The SDM has received a fault message from the PPS.

B0081 3A

The SDM has received a message from the PPS indicating a vehicle and PPS mismatch.

B0081 71

The SDM has received invalid or no serial data from the PPS.


Action Taken When the DTC Sets

* The SDM commands the AIR BAG indicator ON via serial data communications.
* The I/P module deployment loop will be disable.



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.


Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Programming and Relearning (Programming and Relearning) for scan tool information.


Circuit/System Testing


Important: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:


* The PPS module

* The SDM module

* The PPS module harness connector

* The SDM wiring harness connector



1. Verify that DTC U0170 is not set in the SDM.

• If the DTC is set, diagnose that first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions) .

2. Verify the correct PPS part number is installed in the vehicle.

• If the wrong PPS was installed, replace with the correct PPS.

3. Replace the PPS module.



Repair Instructions

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

* Programming and Relearning (Programming and Relearning) for PPS and SDM replacement, setup, and programming
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)