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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - 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. Perform the Circuit/System Verification and Circuit/System Testing first.
  2. Ignition OFF, disconnect the harness connector at the B280 Automatic Transmission Accumulator Solenoid Valve.
  3. Test for 16 - 20 Ω between ignition circuit terminal 1 and control circuit 2.
    • If not between 16 - 20 Ω 

      Replace the B280 Automatic Transmission Accumulator Solenoid Valve.

    • Go to next step: If between 16 - 20 Ω 
  4. Test for infinite resistance between each terminal and the B280 Automatic Transmission Accumulator Solenoid Valve case.
    • If less than infinite resistance 

      Replace the B280 Automatic Transmission Accumulator Solenoid Valve.

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