Kia Optima: Steering wheel / Heated Steering wheel

Kia Optima DL3 2019-2021 Service and Repair Manual / Steering System / Steering wheel / Heated Steering wheel

Description and operation
Discription

The heated steering wheel system improves the themal comfort of the driver by heated the steering wheel when manually selected.

1.

Heated pad

Item
Specification
Voltage
75W ± 10 % (13.5V)
Heated pad resistance
1.95 ± 0.2Ω [21 - 23°C (69.8 - 73.4 °F)]
NTC resistance
10.0 kΩ ± 3% [25 °C (77 °F)]
8.875 - 11.27 kΩ [at 23 - 27 °C (73.4 - 80.6 °F)]

Schematic diagrams
System Circuit Diagram

Heated steering wheel pad

Harness Connector

Terminal Function

Housing
Pin
Function
Wire color
Pad
1
GROUND
Black
2
HEATER
Yellow
3
NTC -
Black
4
NTC +
Gray

Repair procedures
Inspection
1.

Measure a resistance of NTC and Heated pad.

NTC resistance (Black / Gray) :

10.0 kΩ ± 3% [25 °C (77 °F)]

8.875 - 11.27 kΩ [at 23 - 27 °C (73.4 - 80.6 °F)]

Heated pad resistance (Black / Yellow) : 1.95 ± 0.2Ω [21 - 23°C (69.8 - 73.4 °F)]

2.

Measure a temperature.

The temperature of wheel surface grip must rise from -20 °C (-4 °F) to 20 °C (68 °F) within 6 minute

The temperature of wheel surface grip must keep 38 ± 4 °C (100.4 ± 39.2 °F) after 25 minute

At that time switch on, all measure point (1 - 8)

3.

Check for continuity between the terminals in each heated steering switch.

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