Chevrolet Trax: DTC B0081 (Inflatable restraint sensing and diagnostic module): passenger
presence module
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
DTC B0081 71
Passenger Presence Module Invalid Serial Data Received
Circuit/System Description
When the ignition is turned ON, the Inflatable Restraint Sensing and
Diagnostic Module and the Passenger
Presence Module perform tests to diagnose critical malfunctions. Upon a
successful power-up mode the
Inflatable Restraint Sensing and Diagnostic Module will illuminate both
PASSENGER AIRBAG ON/OFF
indicators located in the overhead center console. If the Inflatable Restraint
Sensing and Diagnostic Module
detects a fault in the Passenger Presence Module, it may disable the front
passenger 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 Inflatable Restraint Sensing and Diagnostic Module has received a fault
present message from the
Passenger Presence Module.
B0081 3A
The Inflatable Restraint Sensing and Diagnostic Module has received a message
from the Passenger Presence
Module indicating a vehicle to Passenger Presence Module mismatch.
B0081 71
The Inflatable Restraint Sensing and Diagnostic Module sets this DTC when the
Inflatable Restraint Sensing
and Diagnostic Module has received invalid serial data from the Passenger
Presence Module.
Action Taken When the DTC Sets
- The Inflatable Restraint Sensing and Diagnostic Module 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.
Diagnostic Aids
- If either the Inflatable Restraint Sensing and Diagnostic Module or
Passenger Presence Module 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,
Power Inverter, 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 resets 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 resets 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 (Encore), SIR Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Supplemental Inflatable Restraint 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 allows you to service each component separately (module
and
sensor/sensing mat). Perform a passenger presence system rezero procedure
whenever a component is replaced.
NOTE: Both the Inflatable Restraint Sensing and Diagnostic
Module and Passenger
Presence Module set DTC B0081 but with different symptom 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.
- Verify that DTC B1001 is not set in the Inflatable Restraint Sensing and
Diagnostic Module.
- If DTC B1001 is set in the Inflatable Restraint Sensing and
Diagnostic Module
Refer to DTC B1001.
- If DTC B1001 does not set in the Inflatable Restraint Sensing and
Diagnostic Module
- Verify that DTC B0074, B101D, or B101E is not set in the Passenger
Presence Module.
- If any of these DTCs are set in the Passenger Presence Module, refer
to Diagnostic Trouble
Code (DTC) List - Vehicle
- If none of these DTCs are set in the Passenger Presence Module
NOTE: The Inflatable Restraint Sensing and Diagnostic Module sets a
redundant
B0081 00 DTC when the Passenger Presence Module sets a DTC B0081 11 or B0081 42.
- Verify that DTC B0081 00 is not set in the Inflatable Restraint Sensing
and Diagnostic Module
Refer to the Passenger Presence Module DTC B0081 (Inflatable Restraint
Sensing and
Diagnostic Module), DTC B0081 (Passenger Presence Module).
- If DTC B0081 00 is not set
NOTE: The Inflatable Restraint Sensing and Diagnostic Module sets a
B0081 3A
when an incorrect Passenger Presence Module is installed.
- Verify that DTC B0081 3A is not set in the Inflatable Restraint Sensing
and Diagnostic Module.
Replace the K85 Passenger Presence Module.
- If DTC B0081 3A is not set
- Verify that DTC B0081 71 is not set in the Inflatable Restraint Sensing
and Diagnostic Module.
Replace the B60 Passenger Presence Sensor.
- If DTC B0081 71 is not set
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for Passenger Presence Module and Inflatable Restraint
Sensing and Diagnostic
Module replacement, programming and setup
READ NEXT:
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.
Diag
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.
Diag
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.
Diag
SEE MORE:
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
D
GENERAL PLASTIC REPAIR
WARNING:
In order to reduce the risk of personal injury when exposed to toxic
fumes
while grinding, cutting, or applying repair material on any type of sheet
molded compound or RIM rigid plastic, observe the following guidelines:
Work in a properly ventilated area
Apply p