Kia Optima: Steering wheel / Heated Steering wheel

Kia Optima DL3 2019-2020 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.

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)]
NTC resistance	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

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)]

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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