Hyundai Elantra: Description and Operation - Tire Pressure Monitoring System - Suspension System - Hyundai Elantra HD 2006Ц2010 Service ManualHyundai Elantra: Description and Operation


Description

Warning Lamps

Tread Lamp
-
Tire Under Inflation / Leak Warning.

1.
Turn on condition
A.
When tire pressure is below allowed threshold.
B.
Indicates that tire needs to be re-inflated to placard pressure / repaired.
2.
Turn off condition
A.
Under-inflation ; When tire pressure is above (warning threshold + hysteresis).
B.
Rapid Leak ; When tire pressure is above (leak warning threshold).
TPMS warning can be light on because the tire pressure declined by low temperature in the cold weather.
DTC Warning

1.
Turn on condition
A.
When the system detects a fault that is external to the receiver/ sensor.
B.
When the system detects a receiver fault.
C.
When the system detects a sensor fault.
D.
When the reciever connector is not connected (only applicable to the vehicle with active circuit applied to the instrument cluster)
2.
Turn off condition
A.
If the fault is considered as 'critical', then the lamp is held on throughout the current Ignition cycle (even if the DTC has been demoted). This is because it is important to bring the problem to the drivers attention. On the following Ignition cycle, the demotion conditions will be re-checked. If the demotion conditions occur, the lamp will be turned off. It will be held on until DTC demotion checking is completed.
B.
'Non critical' faults are those that can occur temporarily e.g. vehicle battery under voltage. The lamp is therefore turned off when the DTC demotion condition occurs.
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)
Control module 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.

    Schematic Diagrams
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