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Home >> Cadillac >> 2019 >> ATS V >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P171A-P171C >> Component Testing

Component Testing

Static Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B280 Automatic Transmission Accumulator Solenoid Valve
  3. Test for 17 to 19 ohms between the test points: Component Terminal 1 & Component Terminal 2
    • If not between 17 and 19 ohms 

      Replace the component: B280 Automatic Transmission Accumulator Solenoid Valve

    • Go to next step: If between 17 and 19 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: B280 Automatic Transmission Accumulator Solenoid Valve

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