Kia Sorento: Wireless Charging Unit Description and Operation

Kia Sorento (MQ4, 2021-2026) Service Manual / Body Electrical System / Charging System / Wireless Charging Unit Description and Operation

Description

During IG ON, battery voltage is supplied to the wireless power charger system to transmit an output of 5 W to mobile phone.

Schematic Diagram

Body Electrical System — Charging System / Wireless Charging Unit / Description and Operation / Description illustration

–	Wireless power charger (WPC) : Negligence of mobile phone, foreign object detection (FOD) decision.

–	Body domain control unit : Charging stops when LF (FOB key search) is driven

–	Wireless charging indicator : Displays the charging status.

–	Instrument cluster : Alerts about contact with mobile phone.

Wireless Power Charger System Major Functions

Charging Function

(1)

Activation method

a.	Close all doors of the vehicle.

b.	Switch vehicle power to IG ON.

c.	Place the wireless charging-enabled mobile phone on the tray.

(2)

Charging status display

Mode

Charging LED Display

Possible Cause

Stand-by for charging

LED turned OFF

Charging in process

Amber LED turned ON

Charging completed

Green LED turned ON

Charging error

Amber LED blinks

–	FOD detection : Blinks 10 times and pause for 50 sec → FOD status re-check.

–	High Temp : Blinks 10 times when not charged by high temperature. LED OFF till the ERROR message is erased.

Mobile phone neglect alert function

(1)

Activation method

a.	IG OFF when the phone is still charging.

b.	Check if there is a phone on wireless charging unit.

c.	Display warning message on the cluster if the phone is left in the WPC charge pad and the driver's door is opened or if the phone is left for more than 1 minute. (for about 4 - 5 seconds)

Body Electrical System — Charging System / Wireless Charging Unit / Description and Operation / Description illustration

Overheating prevention

(1)

Activation method

If the thermistor temperature inside the wireless charging module rises above (158 °F (70 °C)), charging will stop to protect the mobile phone battery.

•	The amber LED of the charging display lamp blinks 10 times for 10 seconds.

When the thermistor temperature drops below a certain temperature (149 °F (65 °C)) the charging function is restarted.

When the charging function is restarted, the amber LED of the charging display lamp will be turn on.

Foreign matter detection

(1)

Charging will be disabled if there are coins or other metallic objects between the wireless charging unit and the mobile phone.

Be careful as touching the foreign matter by hand as it may cause burns.

•	Foreign matter : All metallic objects such as coins, clips and precious metals.

•	The amber LED of the charging display lamp blinks 10 times for 10 seconds, and then it is turned off for 50 seconds (total 60 seconds).

•	Do it twice (after 50 seconds off, check once and blink 10 times)

(2)

If a foreign substance is detected and the charging of the mobile phone is stopped, the charging resumes after about 60 seconds when the foreign substance is removed.

When the charging function is restarted, the amber LED of the charging display lamp will be turn on.

Body domain control unit LF frequency interference prevention function

To avoid interference between the wireless charging frequency and the body domain control unit frequency band.

(1)

Wireless charging is stopped when the door is open or the body domain control unit is in LF operation (smart key search).

e.g. Wireless charging function is stopped if the driver carries the smart key out of the vehicle during IG ON.

Charging will stop and the amber LED of the charging display lamp will turn off.

(2)	When the BDC unit LF operation is finished, it operates normally.

6.	Turn the wireless charging function ON/OFF with USM.

Wireless Power Charger (WPC) System Protection

Item	Condition	State
Protects against low/high voltage	Protects and stops charging under 8.5 V and over 16.5 V	LED OFF (Stops operation)
Protects against low/high voltage	Charges between 9 - 16 volts	LED OFF (Stops operation)
Protects against reverse voltage	Protects and stops charging in case of reverse voltage	LED OFF (Stops operation)
Protects against overcurrent	Protects and stops charging in case of detecting 4 amps	Amber LED blinks
Protects against overheating	Protects and stops charging in case of detecting 158 °F (70 °C) by internal temperature sensor of wireless charging module	Amber LED blinks
Protects against overheating	Resumes under 149 °F (65°C)	Amber LED blinks
Foreign substances (Coins, clips, precious metals, etc.)	Protects and stops charging in case of detecting foreign matter (overheating prevention)	Amber LED blinks
Prevents frequency interference	Protects and stops charging by activating IBU in case door or tailgate is open	LED OFF (Stops operation)
Prevents frequency interference	Resumes in 3.5 seconds after all doors and tailgate are closed and IBU operation is completed	LED OFF (Stops operation)
Mobile phone neglect alert function	In case of smart phone on the charging pad when opening the door after IG OFF.	Displays warning message on the instrument panel (for about 4 - 5 seconds)

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Kia Sorento: Wireless Charging Unit Description and Operation

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