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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P17F5-P17F7, P17FA-P17FC, or P17FF >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine - Running
  2. Transmission Range - Park

    Verify the scan tool parameter:

    • { P17F5, P17F6, P17F7 } Transmission Park Valve Position Sensor 1 = 0.6 to 1.0 V
    • { P17FA, P17FB, P17FC } Transmission Park Valve Position Sensor 2 = 0.6 to 1.0 V
    • If not between 0.6 and 1.0 V 

      Refer to: Circuit/System Testing

    • Go to next step: If between 0.6 and 1.0 V 
  3. Transmission Range - Reverse Gear

    Verify the scan tool parameter:

    • { P17F5, P17F6, P17F7 } Transmission Park Valve Position Sensor 1 = 1.7 to 2.1 V
    • { P17FA, P17FB, P17FC } Transmission Park Valve Position Sensor 2 = 1.7 to 2.1 V
    • If not between 1.7 and 2.1 V 

      Refer to: Circuit/System Testing

    • Go to next step: If between 1.7 and 2.1 V 
  4. 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 
  5. All OK.