Circuit/System Verification

Ignition ON
Verify the driver window functions while commanding the Driver Window Motor Up and Down with a scan tool.
- If the Up and Down functions do not work
  Replace the M74D Window Motor - Driver.
- If the UP and DOWN functions works
Verify the driver window performs the Express Up and Express Down functions with the S79D Window Switch-Driver.
- If the driver window does not Express Up and Express Down
  Normalize the M74D Window Motor - Driver, refer to Window Motor Programming - Express Function .
- If the driver window performs the Express Up and Express Down functions
Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
Ignition ON
Verify the driver window performs the Express Up and Express Down functions with the S79D Window Switch-Driver.
- If the driver window does not Express Up and Express Down
  Replace the M74D Window Motor - Driver
- If the driver window performs the Express Up and Express Down functions
All OK.