Tire Monitoring System: Description and Operation

Description

Tread Lamp
- Tire Under Inflation / Leak Warning.




1. Turn on condition
A. When tire pressure is below allowed threshold
B. Over 20kpa per min.
2. Turn off condition
A. When tire pressure is above(warning threshold + hysteresis).
B. When tire pressure leakage is less than 3 psi per min.

DTC Warning
1. Turn on condition
A. When the system detects a fault that is external to the receiver / initiator / sensor.
B. When the system detects a receiver fault.
C. When the system detects a sensor fault.

System Fault
1. General Function
A. The system monitors a number of inputs across time in order to determine that a fault exists.
B. Faults are prioritized according to which has the most likely cause.
C. Certain faults are not covered through DTC. The main ones are:
1) Receiver Micro-controller lock up ; requires observation of lamps at Ignition ON to diagnose.
2) Ignition Line stuck ; requires observation of lamps at Ignition ON to diagnose.