Function Diagnosis

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 low tire pressure 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 by 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 unified meter and A/C amp receives tire pressure status from the BCM using CAN communication. When BCM judges from a transmitter signal that tire pressure is insufficient, BCM transmits a signal to unified meter and A/C amp through CAN communication. unified meter and A/C amp turns on the low tire pressure warning lamp mounted on the Combination meter.

Low tire pressure warning lamp indication





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 blinks according to the self-diagnostic results.

Component Parts Location





Component Description