Kia Picanto: Suspension System / Tire Pressure Monitoring System
Components and components location
1. HECU
2. Cluster
3. TPMS SET Switch
| 4. Wheel speed sensor
5. Tone wheel
|
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 positio ...
Specifications
Specification
Item
Specification
Type Motor Driven Power Steering Steering gear Type Rack & Pinion Rack ...
Other information:
With the Tire Mobility Kit (TMK) you
stay mobile even after experiencing a
tire puncture.
The system of compressor and sealing
compound effectively and comfortably
seals most punctures in a passenger
car tire caused by nails or similar objects
and reinflates the tire.
After you ensur ...
f towing is necessary, we recommend
you to have it done by an authorized
Kia dealer or a commercial tow truck
service.
If towing service is not available in an
emergency, your vehicle may be temporarily
towed using a cable or chain
secured to the emergency towing hook
under the fron ...
Alignment
Steering System