System Description

System Diagram:

SYSTEM DESCRIPTION

1. TIRE PRESSURE WARNING SYSTEM DESCRIPTION




a. The tire pressure warning system informs the driver if it detects a low tire pressure. When the tire pressure warning system detects low tire pressure in any of the 4 wheels, which affects safe driving and the tire pressure warning lamp comes on.
b. Tire pressure warning system is controlled by the skid control ECU.

HINT: When the tire pressure warning reset switch is pressed, the tire pressure warning lamp goes off.

2. TIRE PRESSURE WARNING DISPLAY FUNCTION




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

3. SKID CONTROL ECU
a. Skid control ECU is mounted on the brake actuator assembly. The ECU monitors the tire rotation speeds using the vehicle speed sensors. If one of the rotation speeds is different from the others during a certain time, the ECU interprets this as a low tire pressure. The ECU illuminates the tire pressure warning lamp.

4. TIRE PRESSURE WARNING RESET SWITCH
a. Pressing the switch enables initialization of the tire rotation speed data stored in the skid control ECU.

5. VEHICLE SPEED SENSOR
a. The sensor mounted on the suspension axle hub detects the tire rotation speed.

6. STOP LAMP SWITCH ASSEMBLY
a. The switch used to detect the depressing brake pedal. The judgement of a low tire pressure is prohibited by depressing the brake pedal.

7. AMBIENT TEMPERATURE SENSOR
a. Ambient temperature is used to correct the judgement of a low tire pressure.