• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

Symptom Byte Information:Symptom Byte List

• Ignition=On
• Ignition Voltage=9 to 16 V

K85 Passenger Presence Module=Component Malfunctions

K36 Inflatable Restraint Sensing and Diagnostic Module=This sub type is used by the control module to indicate a mismatch between the hardware connected to the control module and the hardware expected by the control module.

Air Bag Malfunction Indicator=On

System State=Disabled

• A current DTC will clear when the diagnostic runs and passes.
• A history DTC will clear after 50 consecutive malfunction-free ignition cycles.

• The connector position assurance (CPA) should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.
• For safety reasons, a shorting bar in the harness connector short circuits the high and low control circuits when the connector is disconnected.
• Verify the correct replacement part number.
• Inspect for the following conditions:Empty Seat
• Disconnect the battery before replacement of the K85 Passenger Presence Module. This will ensure the proper re-zeroing of the passenger presence module. Refer to: Passenger Presence System Rezeroing

SIR Schematics

Master Electrical Component List

Supplemental Inflatable Restraint System Description and Operation

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Control Module References

Note: Refer to:SIR Service Precautions

• Refer to SIR Service Precautions.
• Refer to SIR Disabling and Enabling.

1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC is not set:B1001@K36 Inflatable Restraint Sensing and Diagnostic Module
• If the DTC is set

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• If the DTC is not set
3. 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 4B.

4. Verify DTC is not set: B0081 00 @ K36 Inflatable Restraint Sensing and Diagnostic Module
• If DTC B0081 00 is set in the Inflatable Restraint Sensing and Diagnostic Module

  The Passenger Presence Module has set B0081 11 or a B0081 4B. Refer to B0081 (Passenger Presence Module) for diagnosis.

• If DTC B0081 00 is not set in the Inflatable Restraint Sensing and Diagnostic Module

Note: The Inflatable Restraint Sensing and Diagnostic Module sets a B0081 3A when an incorrect Passenger Presence Module is installed.

5. Verify DTC is not set:B0081 3A@K36 Inflatable Restraint Sensing and Diagnostic Module
If the DTC is set

Replace the appropriate component:K85 Passenger Presence Module

Note: Disconnect the battery before replacement of the K85 Passenger Presence Module. This will ensure the proper re-zeroing of the passenger presence module. Refer to: Passenger Presence System Rezeroing

• If the DTC is not set
6. All OK.

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

For control module replacement, programming, and setup refer to:Control Module References