Air Pressure Test

Air Pressure Test

1. Mask off both the pressure and the relief valves.
2. Close all the windows.
3. Turn the vehicle's ventilation fan to the on position, with the selector on high speed and in the defrost mode.
4. Unlock and close the doors.
5. Listen for escaping air along the door and the window seals with a stethoscope or a length of heater hose.