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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Automatic Transmission - 6T40 (MNH) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P171A-P171C >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector : B280 Automatic Transmission Accumulator Solenoid Valve
  3. Test for 16 to 20 ohms between the test points : Control terminal 2 & Ignition terminal 1
    • If not between 16 and 20 ohms 

      Replace the component : Automatic Transmission Auxiliary Fluid Accumulator

    • Go to next step : If between 16 and 20 ohms 
  4. Test for infinite resistance between the test points : Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component : Automatic Transmission Auxiliary Fluid Accumulator

    • Go to next step : If infinite resistance 
  5. All OK.
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