Tire Monitoring System: Testing and Inspection

TIRE PRESSURE MONITORING

NOTE: Tire pressure may increase from 2 to 6 psi (14 to 41 kPa) during normal driving conditions. Do NOT reduce this normal pressure build up.

NOTE: Tire pressure will vary with temperature by about 1 psi (6.9 kPa) for every 12�F (6.5�C). This means that when the outside temperature decreases, the tire pressure will also decrease. Tire pressure should always be set based on cold inflation tire pressure. For details, refer to Tires Wheels Tires Standard Procedure.

When diagnosing a tire pressure issue, always check air pressure in the tires first with a known accurate air gauge. Adjust air pressure as necessary to that listed on the Tire Inflation Pressure Label (Placard) provided with the vehicle (usually applied to the driver's side B-pillar). After adjusting air pressure in a tire on the vehicle, allow approximately two minutes for the message or indicator lamp to go out.


Check the tire pressure indicator lamp. If the lamp is illuminating continuously, proceed as listed below. If the indicator lamp is flashing on/off for 60 seconds, once every 10 minutes, there is a system fault detected. Refer to the appropriate diagnostic information.


If air pressure in any tire is low, inspect all the tires for leaks. A water "dunk tank" or other water test may be used to check for a leak around the sensor as long as any water at the valve core is removed once the procedure is completed. The water can be easily expelled from the core area by pushing in on the core for several seconds, allowing escaping air to drive out any moisture. Reinflate the tire as necessary. Always make sure the original valve stem cap is securely installed to keep moisture out of the sensor.


If the gauge-read pressure in the tires does not indicate a tire pressure issue, refer to the appropriate diagnostic information.