System Description

SYSTEM

System Description


DESCRIPTION

During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from tire pressure sensor installed in each wheel, when the tire pressure becomes low. The BCM (Body Control Module) of this system has pressure judgment and trouble diagnosis functions. When the tire pressure monitoring system detects low inflation pressure or another unusual symptom, the low tire pressure warning lamps in the combination meter comes on.

INPUT/OUTPUT SIGNAL

The signal transmission/reception between units via a communication line is mainly as listed in the following table.






TIRE PRESSURE SENSOR






The tire pressure sensor (1) integrated with a valve is installed on a wheel (2), and transmits a detected air pressure signal by radio wave.






REMOTE KEYLESS ENTRY RECEIVER (TIRE PRESSURE RECEIVER)






The remote keyless entry receiver (tire pressure receiver) (1)
receives the air pressure signal transmitted by the tire pressure sensor in each wheel.

BCM (BODY CONTROL MODULE)






The BCM (1) reads the air pressure signal received by the remote keyless entry receiver (tire pressure receiver), and controls the low tire pressure warning lamp and the buzzer operations. It also has a judgment function to detect a system malfunction.

LOW TIRE PRESSURE WARNING LAMP

The combination meter receives tire pressure status from the BCM using CAN communication. When BCM
judges from a tire pressure sensor signal that tire pressure is insufficient, BCM transmits a signal to combination meter through CAN communication. combination meter turns on the low tire pressure warning lamp mounted on the combination meter.