SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2019TRAX PREMIER, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 22 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0081 (PASSENGER PRESENCE MODULE)CIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Trax Premier, AWD

Circuit/System Verification

2019 Chevrolet Trax Premier, AWDSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • This system is serviced as a kit (seat foam, module and sensing mat). Perform a passenger presence system rezero procedure whenever a component is replaced. Refer to Passenger Presence System Rezeroing .
  • Both K36 Inflatable Restraint Sensing and Diagnostic Module and K85 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.
  • The K36 Inflatable Restraint Sensing and Diagnostic Module sets a B0081 3A when an incorrect K85 Passenger Presence Module is installed.
  1. Verify that the seat is free of any objects or an aftermarket seat heater.
    • If objects and/or an aftermarket seat heater is present 
    1. Remove objects and/or aftermarket seat heater.
    2. Ignition ON, clear the DTC.
    3. Verify that DTC B0081 is not set
      • If the DTC B0081 is set, replace the K85 Passenger Presence Module
      • Go to next step: If the DTC B0081 is not set
    4. All OK.
    • Go to next step: If the seat is empty and does not have an aftermarket seat heater 
  2. Verify that DTC B0081 3A is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If DTC B0081 3A is set in the K36 Inflatable Restraint Sensing and Diagnostic Module 

      Replace the K85 Passenger Presence Module.

    • Go to next step: If DTC B0081 3A is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module 
  3. Verify that DTC B0081 11 or DTC B0081 4B is not set in the K85 Passenger Presence Module.
    NOTE:

    The K36 Inflatable Restraint Sensing and Diagnostic Module sets a redundant B0081 00 DTC when the K85 Passenger Presence Module sets a DTC B0081 11 or B0081 4B.

    • If DTC B0081 11 or DTC B0081 4B is set in the K85 Passenger Presence Module 

      Perform the passenger presence system rezero procedure. Refer to Passenger Presence System Rezeroing .

    • Go to next step: If neither of these DTCs are set in the K85 Passenger Presence Module 
  4. Verify DTC B0081 5A is not set in the K85 Passenger Presence Module.
    • If DTC B0081 5A is set in the K85 Passenger Presence Module 
    1. Verify the connections at the K36 Inflatable Restraint Sensing and Diagnostic Module and K85 Passenger Presence Module, for terminal corrosion, properly seated connectors, and the connector position assurance is installed.
    2. Clear the DTC.
    3. Verify DTC B0081 5A does not set in the K85 Passenger Presence Module.
      • If DTC B0081 5A sets, replace the K85 Passenger Presence Module.
      • Go to next step: If DTC B0081 5A does not set
    4. All OK.
    • Go to next step: If DTC B0081 5A is not set in the K85 Passenger Presence Module 
  5. All OK.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.