Kia Cee'd: Tire Pressure Monitoring System / Description and operation

Description
TREAD Lamp
Tire Under Inflation / Leak Warning.

1.
Turn on condition
When tire pressure is below allowed threshold
When rapid leak is detected by the sensor.
Indicates that tire needs to be re-inflated to placard pressure / repaired.
2.
Turn off condition
Under-inflation ; When tire pressure is above (warning threshold + hysteresis).
Rapid Leak ; When tire pressure is above (leak warning threshold).
DTC Warning
1.
Turn on condition
When the system detects a fault that is external to the receiver/ sensor.
When the system detects a receiver fault.
When the system detects a sensor fault.
2.
Turn off condition
DTC occurs, the fault continues until the symptoms resolve, and that the warning light illuminates DTC police, crying, Demotion, if two Clear conditions and assists in Historic, warning light is extinguished.
'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.
  
When driving in high altitude grades, it is natural for the atmospheric pressure to decrease. Therfore, please check the tire pressure and add more air as necessary. Additionally required tire air pressure per km above sea level : 1.5 psi/km
Tire pressure can be decreased naturally due to decrease in ambient temperature (especially in winter). In this case, fill tires with air to the specification if warning lamp is illuminated as this is natural phenomenon.
System Fault
1.
General Function
The system monitors a number of inputs across time in order to determine that a fault exists.
Faults are prioritized according to which has the most likely cause.
Certain faults are not covered through DTC. The main ones are:
a.
Sensor thermal shutdown (over 257°F/125°C).
b.
Ignition Line stuck ; requires observation of lamps at Ignition ON to diagnose.
Components and components location
Components   1. Receiver 2. TPMS Sensor 3. TPMS Sensor 4. TPMS Sensor 5. TPMS Sensor ...

Troubleshooting
TPMS Inspection method Inspection    Find the inspection number by referring to the table above. ...

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