Circuit/System Verification

Ignition ON, command the M74D window motor-driver UP, DOWN, express UP and express DOWN with a scan tool. The M74D window motor-driver should perform the UP, DOWN, express UP and express DOWN commands.
- If the M74D window motor-driver does perform as specified, refer to Driver Window Motor Malfunction .
Command the M74D window motor-driver UP, DOWN, express UP and express DOWN by using the S79D window switch-driver. The M74D window motor-driver should perform the UP, DOWN, express UP and express DOWN commands.
- If the M74D window motor-driver does perform as specified, refer to Driver Power Window Switch Malfunction .
Observe the scan tool Left Rear Main Control Down Switch, Left Rear Main Control Express Switch, Left Rear Main Control Up Switch, Right Rear Main Control Down Switch, Right Rear Main Control Express Switch, Right Rear Main Control Up Switch, Front Passenger Main Control Down Switch, Front Passenger Main Control Express Switch, and the Front Passenger Main Control Up Switch parameters while using the appropriate switches on the S79D window switch-driver. Each value should change from Inactive to Active as the switch is used.
- If the values do not change or if the value is No Communication, refer to Driver Power Window Switch Malfunction .
Command the passenger and rear windows UP and DOWN by using their respective S79 window switch, each window should perform the UP and DOWN functions from each switch.
- If a window does not perform as specified, refer to Passenger/Rear Window Malfunction .
Observe the scan tool Window Lockout Switch parameter while pressing the window lockout switch on the S79D window switch-driver, the value should change from Inactive to Active each time the switch is pressed.
- If the value does not change, replace the S79D window switch-driver.
Observe the window lockout indicator while pressing the window lockout switch on the S79D window switch-driver, the indicator should turn ON and OFF each time the switch is pressed.
- If the indicator is always ON or always OFF, replace the S79D window switch-driver.
- If the indicator flashes ON and OFF, refer to Power Door Child Lock Malfunction .