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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 works as specified: M74D Window Motor - Driver = Up & Down

    • If not the specified state 

      Test or replace the component: M74D Window Motor - Driver

    • If the specified state 
  3. Operate the component: S79D Window Switch - Driver

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

    • If the specified state 
    4. NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  4. Ignition/Vehicle & All vehicle systems Off
  5. Ignition On/Vehicle In Service Mode
  6. Operate the component: S79D Window Switch - Driver

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

    • If not the specified state 

      Test or replace the component: M74D Window Motor - Driver.

    • If the specified state 
  7. All OK.
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