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HOMESERVICE MANUALSCHEVROLET2018SONIC PREMIER, 4D SEDAN, STANDARD TRANSREPAIR AND DIAGNOSISBODY & FRAMEWINDOWSFIXED AND MOVEABLE WINDOW SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESPOWER WINDOWS MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2018 Chevrolet Sonic Premier, 4D Sedan, Standard Trans

Circuit/System Verification

2018 Chevrolet Sonic Premier, 4D Sedan, Standard TransSECTION Circuit/System Verification
  1. Ignition - On / Vehicle - In Service Mode
  2. Perform the scan tool control function: Driver Window Motor - Up & Down

    Verify the component operates in both directions: M74D Window Motor - Driver

    • If not the specified state 

      Refer to: Circuit/System Testing below - Test 1

    • Go to next step: If the specified state 
  3. Operate the component: Driver Left Front Window Switch - Pulled = Up & Release

    Verify the component works as specified: M74D Window Motor - Driver = Express Up

    1. Operate the component: Driver Left Front Window Switch - Pressed & Pulled

      Verify the component works as specified:

    • M74D Window Motor - Driver = Up
    • M74D Window Motor - Driver = Express Up
    • M74D Window Motor - Driver = Down
    • M74D Window Motor - Driver = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing below - Test 2

    • Go to next step: If the specified state 
  4. S79D Window Switch - Driver = Not Pressed

    Verify the scan tool parameter:

    • Left Rear Window Main Control Down Switch = Inactive
    • Left Rear Window Main Control Express Switch = Inactive
    • Left Rear Window Main Control Up Switch = Inactive
    • Right Rear Window Main Control Down Switch = Inactive
    • Right Rear Window Main Control Express Switch = Inactive
    • Right Rear Window Main Control Up Switch = Inactive
    • Front Passenger Window Main Control Down Switch = Inactive
    • Front Passenger Window Main Control Express Switch = Inactive
    • Front Passenger Window Main Control Up Switch = Inactive
    • If not the specified state 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  5. Operate the component: S79D Window Switch - Driver-Left Rear Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Left Rear Window Main Control Down Switch = Active
    • Left Rear Window Main Control Express Switch = Active
    • Left Rear Window Main Control Up Switch = Active
    • If not the specified state 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  6. Operate the component: S79D Window Switch - Driver-Right Rear Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Right Rear Window Main Control Down Switch = Active
    • Right Rear Window Main Control Express Switch = Active
    • Right Rear Window Main Control Up Switch = Active
    • If not the specified state 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  7. Operate the component: S79D Window Switch - Driver-Right Front Window Switch - Pressed & Pulled

    Verify the scan tool parameter:

    • Front Passenger Window Main Control Down Switch = Active
    • Front Passenger Window Main Control Express Switch = Active
    • Front Passenger Window Main Control Up Switch = Active
    • If not the specified state 

      Replace the component: S79D Window Switch - Driver

    • Go to next step: If the specified state 
  8. Perform the scan tool control function: Passenger Window Motor - Up & Down

    Verify the component operates in both directions: M74P Window Motor - Passenger

    • If not the specified state 

      Refer to: Circuit/System Testing below - Test 1

    • Go to next step: If the specified state 
  9. Operate the component: S79P Window Switch - Passenger - Pulled = Up & Release

    Verify the component works as specified: M74P Window Motor - Passenger = Express Up

    1. Operate the component: S79P Window Switch - Passenger - Pressed & Pulled

      Verify the component works as specified:

    • M74P Window Motor - Passenger = Up
    • M74P Window Motor - Passenger = Express Up
    • M74P Window Motor - Passenger = Down
    • M74P Window Motor - Passenger = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing below - Test 3

    • Go to next step: If the specified state 
  10. Verify the scan tool parameter: Left Rear Window Switch at Door = Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing below- Test 4

    • Go to next step: If the specified state 
  11. Operate the component: S79LR Window Switch - Left Rear - Pressed & Pulled

    Verify the scan tool parameter:

    • Left Rear Window Switch at Door = Up
    • Left Rear Window Switch at Door = Down
    • Left Rear Window Switch at Door = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing below - Test 4

    • Go to next step: If the specified state 
  12. Verify the scan tool parameter: Right Rear Window Switch at Door = Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing below- Test 4

    • Go to next step: If the specified state 
  13. Operate the component: S79RR Window Switch - Right Rear - Pressed & Pulled

    Verify the scan tool parameter:

    • Right Rear Window Switch at Door = Up
    • Right Rear Window Switch at Door = Down
    • Right Rear Window Switch at Door = Express Down
    • If not the specified state 

      Refer to: Circuit/System Testing below- Test 4

    • Go to next step: If the specified state 
  14. All OK.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.