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Home >> GMC >> 2024 >> Terrain SLT, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (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 2024 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B280 Automatic Transmission Accumulator Solenoid Valve.
  2. Test for 16 - 20 Ω between relay terminals 1 and 2.
    • If not between 16-20 Ω 

      Replace the B280 Automatic Transmission Accumulator Solenoid Valve.

    • Go to next step: If between 16-20 Ω 
  3. Test for infinite resistance between terminal 1 and the B280 Automatic Transmission Accumulator Solenoid housing.
    • If not infinite resistance 

      Replace the B280 Automatic Transmission Accumulator Solenoid Valve.

    • Go to next step: If infinitive resistance 
  4. All OK.
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