Tire Monitoring System: Description and Operation

System Diagram:

SYSTEM DIAGRAM


1. TIRE PRESSURE WARNING SYSTEM DESCRIPTION

a. The tire pressure warning system informs the driver that it detects low tire pressure. When the tire pressure warning system detects low tire pressure in any of the 4 wheels, which affects safe driving, the tire pressure warning indicator comes on.






HINT: When the tire pressure warning reset switch is pushed, the tire pressure warning indicator does not come on. However, when the ignition switch is turned to the ON position again, and the vehicle is driven at more than 19 mph (30 km/h), the tire pressure warning indicator comes on again.




b. When the "Low Tire" indicator comes on, immediately check the air pressure of all tires and adjust to the specified pressure.
c. In the following cases, the system may not operate normally.
- Vehicle speed is 19 mph (30 km/h) or less or more than 62 mph (100 km/h).
- Tire size is different from the specification.
- Different sizes or types of tires are used simultaneously.
- A spare tire, snow tires or chains are used.
- The vehicle is driven on an unpaved, extremely rough or slippery road.
- One of the tires on the vehicle is extremely worn or new.
- The vehicle is towing a trailer.
- Rapid acceleration/deceleration or sharp turns is continued.
- Outside temperature is below 32 °F (0 °C) or over 104 °F (40 °C).

2. FAIL-SAFE FUNCTION




a. If there is a malfunction in the skid control ECU, the ECU turns the "Check System" indicator on and prohibits operating the tire pressure warning system.
b. The result of this diagnosis is stored in the skid control ECU.

3. TIRE PRESSURE WARNING DISPLAY FUNCTION




a. The tire pressure warning indicator comes on according to the condition of the tire pressure warning system, as shown in the table on the DIAGNOSIS SYSTEM.




4. Function of components