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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Automatic Transmission - 6T50 (M2D) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P171A, P171B, Or P171C: Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B280 Automatic Transmission Accumulator Solenoid Valve
  3. Test for 16-20 Ω between the test points: Control terminal 2 & Ignition terminal 1
    • If not between 16-20 Ω 

      Replace the component: Automatic Transmission Auxiliary Fluid Accumulator

    • Go to next step: If between 16-20 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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