LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2024 >> Terrain AT4 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC P189C >> Circuit/System Testing

Circuit/System Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: K71 Transmission Control Module
  3. Ignition - On / Vehicle - In Service Mode
  4. Test for 2 to 12 V between the test points: Serial Data circuit terminal 31 & Ground
    • If not between 2 and 12 V 

      Repair the open/high resistance in the circuit.

    • Go to next step: If between 2 and 12 V 
  5. Replace the component: K71 Transmission Control Module
scientia non olet · About LEMON Manuals