System Description

FUNCTION DIAGNOSIS

TPMS

System Diagram





System Description

DESCRIPTION
During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from transmitter 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 warning lamps in the combination meter comes on.

TRANSMITTER





A sensor-transmitter (1) integrated with a valve is installed on a wheel (2), and transmits a detected air pressure signal in the from of a radio wave.
<=: Outside

TIRE PRESSURE RECEIVER





The tire pressure receiver (1) receives the air pressure signal transmitted by the transmitter in each wheel.

BCM (BODY CONTROL MODULE)





The BCM (1) reads the air pressure signal received by the 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 a low tire pressure condition is sensed by the BCM, the combination meter low tire pressure warning lamp is activated.





TIRE PRESSURE WARNING CHECK SWITCH





The following item can be checked by grounding the tire pressure warning check switch (1) harness connector terminal.
^ The low tire pressure warning lamp in the combination meter will flicker according to the self-diagnostic results.