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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Automatic Transmission - 10L80 (MF6) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P17C5, P17C6, P17CC, P17CD Or P17D6: Intermediate Speed Sensor 2 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Cadillac Escalade ESV, and 2018 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter:9V Reference 1 Circuit Status = OK
    • If not the specified state 

      Refer to Circuit/System Testing below

    • Go to next step: If the specified state 
  3. Raise and support the vehicle.
    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. Start and idle the engine.
  5. Transmission in Drive
  6. Verify the scan tool parameter:Transmission Intermediate Speed Sensor 2 = The value should change smoothly and gradually as the vehicle speed is increased and decreased.
    • If the value does not change smoothly and gradually 

      Refer to Circuit/System Testing below

    • Go to next step: If the value changes smoothly and gradually 
  7. 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 below

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