2005 Jeep Grand Cherokee Owner Manual - Page 167

UNDERSTANDING YOUR INSTRUMENT PANEL 167 12. Tire Pressure Monitor Warning Light This light will turn on continuously when there is a low tire pressure condition. The light will also turn on if a problem exists with any tire sensor. When a system fault is detected, the indicator lamp will flash repetitively for ten seconds. The flash cycle will repeat every ten minutes or until the fault condition is removed and reset. The light will remain on or flashing until the tire pressure is properly set or the problem with the sensor is corrected. This light will turn on momentarily as a bulb check when the engine is started. When the tire pressure monitoring system warning light is lit, one or more of your tires is significantly underinflated. You should stop and check your tires as soon as possible, and inflate them to the proper pressure as indicated on the tire and loading information placard. Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability. Each tire, including the spare, should be checked monthly when cold and set to the recommended inflation pressure as specified in the tire and loading information placard. (See page 269 for more information.) 13. Temperature Gauge The temperature gauge shows engine coolant temperature. Any reading within the normal range indicates that the engine cooling system is operating satisfactorily. The gauge pointer will likely indicate a higher temperature when driving in hot weather, up mountain grades, or when towing a trailer. It should not be allowed to exceed the upper limits of the normal operating range. 4