Kia Rio YB Quiz
Suspension System

Tire Pressure Monitoring System

In this manual: Suspension System
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9steps
~54min
2/5difficulty
Done 0 of 9

Components and Component Location

Components

1. ESC Module
2. Cluster
3. TPMS SET Switch		 4. Wheel Speed Sensor
5. Tone Wheel

Description and Operation

Description

Indirect Tire Pressure Monitoring System (TPMS)

Using the wheel rotational speed signal from the ESC, the system analyzes the tire rolling radius and changes in tire stiffness to detect pressure loss.

The TPMS detects low pressure by calculating pressure loss based on the set pressure. Therefore, the recommended pressure must be re-stored using the SET button after tire replacement or tire pressure adjustment.

Differences Between Direct and Indirect TPMS

Indirect TPMS Direct TPMS

  • Tire rolling radius and changes in tire stiffness are calculated indirectly.

  • An air pressure sensor is not required in the wheel.

  • The recommended tire pressure must be re-stored after replacing a tire or adjusting tire pressure (by pressing the "SET" button).

  • Tire pressure inside the tire is measured by a sensor and then transmitted wirelessly to the receiver.

  • To be installed.

  • Poor performance may occur due to frequency noise, since the direct TPMS uses a wireless transmission method.

Low Tire Pressure Warning Light

  1. ON Condition

    • • When the tire pressure is below the allowable threshold

  2. OFF Condition

    • When the low tire pressure warning light illuminates due to a rapid leak, the warning light turns off if the tire is inflated above the warning threshold.

Indirect TPMS Malfunction Function

Type Conditions Symptoms Possible Cause
Driving conditions Driving at Low Speed Continuous driving at speeds below 25 km/h Warning not issued Reduced reliability of wheel speed sensor data
Driving at High Speed Continuous driving at speeds above 120 km/h Reduced Performance Tire Characteristics
Deceleration/Acceleration Rapid Acceleration/Braking Warning Delay Lack of effective information
Road Condition Sharp Turns or Winding Roads Warning Delay Lack of effective information
Road Surface Conditions Unpaved or slippery road surfaces Warning Delay Lack of effective information
Snow Chains Snow chains are installed on the vehicle tires. Warning not issued Reduced reliability of wheel speed sensor data

Troubleshooting

Troubleshooting

Symptom Possible Cause Remedy
The low tire pressure warning light illuminates when tire pressure is correct / The low tire pressure warning light does not illuminate when pressure is low.

  • The SET button was not pressed after replacing a tire or adjusting the air pressure.

  1. Check the air pressure.

  2. Make sure the wheel size option coding procedure was performed correctly.

    • If the code does not match vehicle options, such as wheel size, repeat the procedure.

  3. Check the recommended tire pressure, then press the SET button.

    • Do not press the SET button without checking the air pressure.

    • The warning light may not illuminate when driving with snow chains installed or driving on unpaved roads.

  • The SET button was pressed with incorrect pressure.

  • The SET button was pressed at low pressure without inflating the tire to the specified pressure (regardless of warning light illumination).

  • The SET button was pressed with tires overinflated or underinflated.

  • The SET button was pressed with a significant pressure difference between the tires.

  • When driving with snow chains installed

  • When driving mainly on unpaved/winding roads

Repair Procedures

Inspection

Indirect TPMS Reset Procedure

  1. Adjust the pressure in all 4 tires to the recommended air pressure.

  2. Press and hold the SET button for more than 3 seconds to store the pressure.

  3. Check that the system warning light flashes for 4 seconds. (Turns off after flashing)

  4. Perform the learning procedure by driving.

Diagnostic Procedure Using the Diagnostic Device

Perform indirect TPMS option coding with the diagnostic tool when replacing the ESC module.

Test yourself

A quick Kia Rio YB quiz: every answer comes with an explanation and a link to the manual page.