In order to find a leak the tire must be properly pressurized.  You should inflate your tire with air until it reaches the appropriate pressure (measured in psi) specified in your vehicle's service manual. Before moving on to more time consuming techniques, you should take a moment to look at your tire. If you notice any holes, cuts, or objects protruding from tire then you have found your leak. As air escapes the tire and encounters the soapy water mixture it will form soap bubbles. If you notice the soapy water bubbling at any particular place on the tire, you have found your leak.
انفخ الإطار. تفقّد الإطار بالنظر. راقب ظهور الفقاعات.