Kia Optima: Suspension System / Tire Pressure Monitoring System

Kia Optima DL3 2019-2020 Service and Repair Manual / Suspension System / Tire Pressure Monitoring System

Components and components location
Components

1. Integrated Body Control Unit (IBU)
2. TPMS sensor (FL)
3. TPMS sensor (RL)
4. TPMS sensor (RR)
5. TPMS sensor (FR)

Description and operation
Description

The Tire Pressure Monitoring System (TPMS) monitors the pressure and temperature inside the tire in order to warn the driver of changes in pressure which may influence the operation of the vehicle. The TPMS control module analyzes wireless information froIn other words, the system detects the pneumatic pressure of the tires and warns the driver of if the pneumatic pressure drops below the standard level.

Low-pressure Warning Lamp on the Dashboard

Dashboard tire low-pressure warning light

Lamp ON/OFF Conditions when the Tire Pressure Decreases or Air is Leaking from the Tire

1.

Lamp ON

The lamp turns ON when the tire pressure decreases below the standard level.

2.

Lamp OFF

Low pneumatic pressure: The warning lamp turns OFF when the tire pressure exceeds the pressure required to turn off the lamp.

TPMS Fault Warning Lamp

1.

Warning Conditions and Display

When the system detects a defect in the external operating environment (low battery voltage, abnormal vehicle speed, etc), the warning lamp blinks for about 1 minute and then turns ON.

2.

Lamp OFF

The warning lamp turns OFF when the DTC is resolved. The DTC is automatically resolved when the system does not receive any fault signals for 30 or more ignition cycles after it changes to the previous fault code.

  

If this phenomenon occurs while driving, you should check the cause of the fault even after the DTC is resolved.

(Turn the ignition switch from OFF to ON. Then, check the lamp status.)

The warning lamp turns off once the DTC is resolved. The warning lamp stays on until you complete the check necessary to resolve the DTC.

If the DTC is resolved, the warning lamp turns OFF during the same ignition cycle.

  

If the vehicle starts within 19 minutes after the replacement of the wheel of the stopped vehicle, the TPMS Malfunction Indicator on the instrument cluster illuminates.

The above symptom is due to communication failure between the BCM and the replaced TPMS ID.

This communication failure indicator turns off in 19 minutes after the vehicle stops through the BCM’s automatic learning process of TPMS ID.

(When driving the vehicle after stopping for over 19 minutes, the indicator turns off automatically.)

System Defect

1.

General Operation

The system detects many input elements to identify potential defects.

The priority of a defect depends on its cause.

Certain defects are not diagnosed as DTCs.

The following are major defects:

In order to diagnose more symptoms of the fault when the ignition line malfunctions, you must check the warning lamp when you turn the ignition on.

Check whether the warning lamp turns on and then off.

Troubleshooting
TPMS Inspection method

Inspection
  

Find the inspection number by referring to the table above.

The following content is irrelevant of the inspection procedure.

1.

Warning lamp types

Keeps 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

  

Turn IG OFF and then IG ON again to check the warning light type.

2.

(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 : Keeps on without blinking

3.

(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.

4.

(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.

5.

Low tire pressure warning lamp

Cold : Vehicle kept for more than 60 minutes after stopping.

→ 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.

  

In case the warning lamp fails to turn OFF after injecting tire pressure, disconnect the KDS and drive less than 1 km at 25 km/h.

6.

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

  

Turn IG OFF and then IG ON again to check the warning lamp type.

B.

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).

7.

DTC checklist for performance test.

List
symptoms
Inspection items
Detailed checklist
Component/parts
C1312(FL)
C1313(FR)
C1314(RL)
C1315(RR)
TPMS sensor receive error.
Sensor RF transmission state
Confirm sensor RF transmission
Check sensor DTC
Inspect sensor battery
TPMS Sensor
Vehicle electronic units noise
Vehicle operating conditions
C1332(FL)
C1333(FR)
C1334(RL)
C1335(RR)
Sensor internal failure
Inspect sensor RF transmission
Sensor battery voltage
Check sensor RF transmission
Check sensor battery (KDS)
TPMS Sensor
C1662
Auto learning failure
Sensor RF transmission state
Inspect EMS vehicle speed (VS)
Inspect vehicle noise
Confirm sensor RF transmission
Inspect sensor battery
Inspect EMS vehicle speed (VS)
Inspect vehicle electronic unit noise
TPMS Sensor
Vehicle electronic units noise
Vehicle operating condition
EMS vehicle speed signal
C1663
Auto learning failure
Sensor RF transmission state
Inspect EMS vehicle speed (VS)
Inspect vehicle noise
Confirm sensor RF transmission
Inspect sensor battery
Inspect EMS vehicle speed (VS)
Inspect vehicle electronic unit noise
TPMS Sensor
Vehicle electronic units noise
Vehicle operating condition
EMS vehicle speed signal

  

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, TPMS receiver.

Alignment
Repair procedures Front Wheel Alignment    • When using a commercially available computerized ...

TPMS Sensor
Description and operation Description 1. Function • By detecting the pressure, temperature, acceleration, and battery condition, tra ...

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