LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Automatic Transmission - 8L45 (M5N) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0815, P0816, or P0826 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter: Driver Shift Control Mode Switch @ K9 Body Control Module = Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  3. Press and hold the switch: S2L Automatic Transmission Manual Shift Auxiliary Position Switch - Left

    Verify the scan tool parameter: Driver Shift Control Mode Switch @ K9 Body Control Module = Downshift

    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  4. Press and hold the switch: S2R Automatic Transmission Manual Shift Auxiliary Position Switch - Right

    Verify the scan tool parameter: Driver Shift Control Mode Switch @ K9 Body Control Module = Upshift

    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  5. Operate the component: Steering Wheel - Rotate the component 360° in one direction and then 360° in the other direction.

    Verify the scan tool parameter: Driver Shift Control Mode Switch @ K9 Body Control Module = Inactive - The parameter state should not change.

    • If not the specified state 

      Replace the component: X85 Steering Wheel Air Bag Coil

    • Go to next step: If the specified state 
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  7. All OK.