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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 9T50 (M3E) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0815, P0816, or P0826 >> Component Testing

Component Testing

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  1. Ignition/Vehicle - Off
  2. Remove the component: Transmission Control Lever Knob
  3. Disconnect the electrical connector: S3 Transmission Shift Lever
  4. Test for 5,900 to 6,400 ohms between the test points: Signal terminal 3 & Ground circuit terminal 2
    • If not between 5,900 and 6,400 ohms 

      Replace the component: S2A Transmission Manual Shift Switch - Up/Down

    • Go to next step: If between 5,900 and 6,400 ohms 
  5. Press and hold the switch: S2A Transmission Manual Shift Switch - Up/Down - Downshift
  6. Test for 1,900 to 2,100 kohms between the test points: Signal terminal 3 & Ground circuit terminal 2
    • If not between 1,900 and 2,100 ohms 

      Replace the component: S2A Transmission Manual Shift Switch - Up/Down

    • Go to next step: If between 1,900 and 2,100 ohms  
  7. Press and hold the switch: S2A Transmission Manual Shift Switch - Up/Down - Upshift
  8. Test for 600 to 660 ohms between the test points: Signal terminal 3 & Ground circuit terminal 2
    • If not between 600 and 660 ohms 

      Replace the component: S2A Transmission Manual Shift Switch - Up/Down

    • Go to next step: If not between 600 and 660 ohms  
  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: S2A Transmission Manual Shift Switch - Up/Down

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