LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MHU MQC) - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC P176B-P176D, P178F, or P17D3 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the scan tool parameter: Sensor Supply 2 Circuit Status = Okay
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  3. CAUTION:

    Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.

  4. Raise and support the vehicle.
  5. Start and idle the engine.
  6. Transmission in Drive
  7. Verify the scan tool parameter: Intermediate Speed Sensor = The value should change smoothly and gradually as the vehicle speed is increased and decreased. - Refer to: Circuit/System Description
    • If the value does not change smoothly and gradually 

      Refer to: Circuit/System Testing

    • Go to next step: If the value changes smoothly and gradually 
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.Verify the DTC does not set.
    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  9. All OK.