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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0815, P0816 Or P0826: Up And Down Shift Switch Circuits >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Remove the component: Transmission Control Lever Knob
  3. Disconnect the electrical connector: S2 Transmission Manual Shift Switch
  4. Test for 5, 900 to 6, 400 Ω between the test points: Signal terminal 11 & Ground circuit terminal 12
    • If not between 5, 900 and 6, 400 Ω 

      Replace the component: Transmission Control Lever Knob

    • Go to next step: If between 5, 900 and 6, 400 Ω 
  5. Press and hold the switch: S2 Transmission Manual Shift Switch - Downshift
  6. Test for 1, 900 to 2, 100 kΩ between the test points: Signal terminal 11 & Ground circuit terminal 12
    • If not between 1, 900 to 2, 100 kΩ 

      Replace the component: Transmission Control Lever Knob

    • Go to next step: If between 1, 900 to 2, 100 kΩ 
  7. Press and hold the switch: S2 Transmission Manual Shift Switch - Upshift
  8. Test for 600 to 660 Ω between the test points: Signal terminal 11 & Ground circuit terminal 12
    • If not between 600 and 660 Ω 

      Replace the component: Transmission Control Lever Knob

    • Go to next step: If not between 600 and 660 Ω 
  9. 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: Transmission Control Lever Knob

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