System Description

System Description

- During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from transmitter installed in each wheel. The low tire pressure warning control unit has pressure judgment and trouble diagnosis functions. When the low tire pressure warning control unit detects low inflation pressure or another unusual symptom, the low tire pressure warning lamps in the combination meter comes on.
- If the tire pressure is less than the specified value, the low tire pressure warning lamp illuminates that the tire pressure is less than the specified value.
- Activates the TPMS (Tire Pressure Monitoring System) when the vehicle speed is 40 km/h (25MPH) or more.
- The tire pressure information for each wheel is displayed on the vehicle information display.

SYSTEM DIAGRAM






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






LOW TIRE PRESSURE WARNING LAMP CONTROL CONDITION
Uses CAN communication from the low tire pressure warning control unit to illuminate the low tire pressure warning lamp on the combination meter.






HAZARD WARNING LAMP CONTROL CONDITION
The low tire pressure warning control unit transmits a hazard request signal to BCM. BCM blinks the hazard warning lamp, according to the signal.
The hazard warning lamp blinks under the following conditions.

Condition of Blinking The Hazard Warning Lamp
- When wake-up of registered wheel has been completed. Work Procedure.
- When ID registration is completed. ID Registration.

BUZZER CONTROL CONDITION
The low tire pressure warning control unit transmits a buzzer request signal to BCM. Based on the signal, BCM sends a command to the combination meter to sound the buzzer.
The buzzer sounds under the following conditions.

Condition of Sounding Buzzer
- When wake-up of registered wheel has been completed. Work Procedure.