Hyundai i-30: Tires/Wheels / Tire Pressure Monitoring System
Description and operation
Indirect Tire Pressure Monitoring System (TPMS)
Using a wheel speed signal from the ESC, the system analyzes the turning radius
of the tire and change in tire stiffness to detect a pressure loss.
TPMS determines under-inflation by calculating pressure loss based on the specified
pressure. The recommened pressure must therefore be re-saved by operating the
SET button once tires are replaced or pressures are adjusted.
Differences between direct and indirect TPMS
Indirect TPMS
|
Direct TPMS
|
|
|
|
| •
|
The turning radius of the tire and change in tire stiffness
are calculated indirectly.
|
| •
|
No air pressure sensor needs to be installed in the unit.
|
| •
|
The recommended tire pressure has to be re-saved after replacing
a tire or adjusting air pressure (by pressing the "SET" button).
|
|
| •
|
The infaltion pressure inside the tire is measured using a sensor
and then wirelessly transmitted to the unit.
|
| •
|
A separate unit and four air pressure sensors are required to
be installed.
|
| •
|
Poor performance may occur due to frequency noises as the direct
TPMS adopts a wireless transmission method.
|
|
Low tire pressure warning lamp
|
1. |
Turn-on condition
| •
|
• When tire pressure is below the allowed threshold
|
|
|
2. |
Turn-off condition
| •
|
When the low tire pressure warning light illuminates due to
the rapid leak, the warning light will extinguish if tire is
inflated above the warnning threshold.
|
|
Interferences to normal function of indirect TPMS
Type
|
Conditions
|
Symptoms
|
Possible cause
|
Driving conditions
|
Low speed driving
|
Driving continuously at less than 25kph
|
No warning issued
|
Lower reliability of the wheel speed sensor data
|
High speed driving
|
Driving continuously at more than 120kph
|
Lower performance
|
Tire characteristics
|
Deceleration/Acceleration
|
Rapid acceleration/ brake
|
Delay of warning
|
Lack of effective information
|
Road condition
|
Sharp curve or crooked road
|
Delay of warning
|
Lack of effective information
|
Road surface condition
|
Unpaved or slippery road surfaces
|
Delay of warning
|
Lack of effective information
|
Snow chain
|
Snow chains are mounted on the vehicle's tires
|
No warning issued
|
Lower reliability of the wheel speed sensor data
|
Troubleshooting
Symptom
|
Possible cause
|
Remedy
|
Low tire pressure warning lamp turns on at the correct tire pressure/ Low
tire pressure warning lamp fails to turn on at the low pressure
|
| •
|
SET button has not been pressed after tire replacement or air
pressure adjustment.
|
|
|
1. |
Check the air pressure.
|
|
2. |
Check that the wheel inch variant coding procedure has been
correctly performed.
|
– |
If the coding is inconsistent with vehicle's options
e.g.wheel size,etc. repeat the procedure.
|
|
|
3. |
Check the recommended tire pressure level and then press the
SET button.
|
– |
Do not press the SET button without verifying the air
pressure.
|
|
– |
Warning light may not be illuminated when driving with
snowchains installed, or driving on unpaved roads.
|
|
|
| •
|
SET button has been pressed at the incorrect pressure.
|
| –
|
SET button has been pressed at the low pressure without filling
the tire(s) to specified pressures (regardless of the warning
light illumination).
|
| –
|
SET button has been pressed with tires over or under inflated.
|
| –
|
SET button has been pressed with significant differences in
pressure between tires.
|
|
| •
|
When driving with snowchains installed
|
|
| •
|
When driving mainly on unpaved/ curved roads
|
|
Repair procedures
| Indirect TPMS Reset Procedure |
|
1. |
Adjust pressure in all 4 tires to the recommended air pressure.
|
|
2. |
Press the SET button for more than 3 seconds to store the pressure.
|
|
3. |
Check if system warning light blinks for 4 seconds. (turn off after
blinking)
|
|
4. |
Perform the learning procedure through driving.
|
• |
Perform the learning procedure on a level surface.
|
|
• |
At least 20 minutes of learning time is required.
|
|
|
| Diagnosis procedure using a diagnostic
device |
Perform the indirect TPMS variant coding using a diagnostic device in case of
ESC module replacement.
Repair procedures
Front wheel alignment
•
When using a commercially available computerized wheel alignment
equipment to inspect the front wheel alignment, always position
the vehicle on a level surface with the front wheels facing
straight ahead...
Other information:
Components
[LHD]
1. ESP Control
Module (HECU)
2. Front Wheel Speed Sensor
3. Rear Wheel Speed Sensor
4. Warning lamp
5. EBD / Parking brake warning lamp
[RHD]
1...
Repair procedures
Removal
1.
Loosen the wheel nuts slightly.
Raise the vehicle, and make sure it is securelysupported.
2.
Remove the rear wheel and tire (A) from the rearhub...
Categories
Opening the bonnet
1. Park the vehicle and set the parking
brake.
2. Pull the release lever to unlatch
the bonnet. The bonnet should
pop open slightly.
read more
Alignment
