KIA Niro: Troubleshooting - Tire Pressure Monitoring System
TPMS Inspection method
Inspection
Warning
Find the inspection number by referring to the table above.
The following content is irrelevant of the inspection procedure.
- Warning lamp types
- Stays on without blinking : Low pressure tire warning lamp
- Flashes at 0.5 second intervals constantly : Initial state warning lamp
- Cluster blinks for 1 minute at 1 second intervals, then turns ON : Error code warning lamp
Warning
Turn IG OFF and then IG ON again to check the warning light type.
- (1) Check the warning lamp state.
- Check the vehicle warning lamp state.
- Check if the warning lamp state is caused by tire low pressure.
Symptom : Stays on without blinking
- (2) Check the warning lamp state.
- Check the vehicle warning lamp state.
- Check if the warning lamp state is caused by the initial state (virgin mode) of TPMS receiver.
Symptom : Flashes at 0.5 second intervals constantly.
- (3) Check the warning lamp state.
- Check the vehicle warning lamp state.
- Check if the warning lamp state is caused by error code (TPMS receiver & TPMS sensor failure).
Symptom : Cluster blinks for 1 minute at 1 second intervals, then turns ON.
- Low tire pressure warning lamp
Cold : Vehicle that has been stationary for over 60 minutes
→ 0.07 kgf/cm² (1.0 psi) additional injection at the specified tire pressure.
Hot : Driven vehicle
→ 0.28 kgf/cm² (4.0 psi) additional injection at the specified tire pressure.
Warning
In case the warning lamp fails to turn OFF after injecting tire pressure, disconnect the KDS/GDS and drive less than 1 km at 25 km/h.
- Inspect initial state warning lamp
A. TPMS warning lamp
(1) Check the TPMS warning lamp status.
(2)Flashes at 0.5 second intervals constantly. -> Initial state warning lamp
Warning
Turn IG OFF and then IG ON again to check the warning lamp type.
- Items to check in case of blinking warning lamp
(1) Enter sensor ID.
(Refer to TPMS Receiver - "Repair procedures") (2) Enter vehicle name.
(Refer to TPMS Receiver - "Repair procedures") (3) Enter VIN.
(Refer to TPMS Receiver - "Repair procedures") (4) Change TPMS ECU mode (to Standard mode).
- DTC checklist for performance test.
Warning
- Be sure to check DTC.
(Refer to DTC manual - "Tire Pressure Monitoring")
- If the TPMS warning light does not turn on : TPMS sensor periodically learns the sensor through driving.
- If the TPMS warning light turns on : Replace TPMS sensor and TPMS receiver.
TPMS Sensor Description and operation
Description
- Function
- By detecting the pressure, temperature, acceleration, and battery condition, transmit information to ECU by a wireless RF.
- Wheel location is recognized by comparing the Wheel Pulse of ECS (ABS) and acceleration values of the sensor (High Line).
- Structure and features
- There are four (4) sensors each mounted on each wheel of the vehicle.
- Frequency conversion type is FSK, and High Line is used in common.
TPMS Automatic Location Learning
- The wheel angular velocity of each wheel is different from each other in the following cases:
1) Different slip occurs for each axis.
2) Rotation radius (the radius of curve) is different by wheel.
3) Tire wear, internal pressure, tire specifications, etc. are different by tire.
- TPMS sensor is transmitted to RF signal at only specific phase (the angle of the tire) in the learning mode.
- TPMS receiver checks each tire phase (tire angle) information on receiving RF signals from the sensor.
- Every time RF signals from sensor IDs 1, 2, 3, and 4 are received, the ID with the highest correlation among the phase of each collected wheel is transmitted. (In other words, each time RF signal is received, the phase of the tire is transmitted to the most constant wheel.)
- TPMS sensor transmits the RF signal at intervals of 16 seconds in the learning mode.
- After stopping or parking for more than 19 minutes, automatic learning function in every driving position is performed.
- The sensor is converted to Parking Mode when stopped or parked for more than 15 minutes. When acceleration of over 4g (15-20km/h) is detected in Parking Mode, it is converted to First Block Mode.
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