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Home >> Chevrolet >> 2021 >> Equinox LS, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P171A-P171C >> Component Testing

Component Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B280 Automatic Transmission Accumulator Solenoid Valve
  3. Test for 16 to 20 Ω between the test points: Control terminal 2 & Ignition terminal 1
    • If not between 16 and 20 Ω 

      Replace the component: Automatic Transmission Auxiliary Fluid Accumulator

    • Go to next step: If between 16 and 20 Ω 
  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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