Service and Parts Business

Technical Journal
TITLE:

WPC (Wireless Phone Charger) charging information
REF NO:

ISSUING DEPARTMENT:

CAR MARKET:

TJ 36125.3.0

Technical Service

United States and Canada

PARTNER:

ISSUE DATE:

STATUS DATE:

3 US 7510 Volvo Car USA

2023-02-24

2023-01-11

FUNC GROUP:

FUNC DESC:

3942

Mobile telephone

Page 1 of 4

“Right first time in Time”
Attachment
File Name
Reference Magnet array TJ 36125.jpg

File Size
0.0837 MB

Rows beginning with * are modified
Note! If using a printed copy of this Technical Journal, first check for the latest online version.
DESCRIPTION:
* Text partially reworked.
If the cell phone seems to charge intermittently or shuts off charging when placed on the WPC, read
general information under Service.
WPC = Wireless phone charger
APMS = Airborne Particulate Matter Sensor
CEM = Central electronic module
CSC Customer Symptom Codes
Code
35
7S

Description
Power outlet/Wireless phone charger does not work
Cellular phone/Other cellular phone problems

Produced and printed in the USA and available as an electronic document.
© 2023 VOLVO CAR USA, LLC

Technical Journal 36125.3.0
DTC Diagnostic Trouble Codes
Vehicle Type
Type

Eng

Eng
Desc

Sales

Body

Gear

224
225
227
235
236
238
246
256
536
539

Steer

Model Year
2021-9999
2021-9999
2021-9999
2021-9999
2021-9999
2021-9999
2021-9999
2021-9999
2018-9999
2022-9999

Plant

Chassis range
-

Struc Week
Range
202020-999952
202020-999952
202020-999952
202020-999952
202020-999952
202020-999952
202020-999952
202020-999952
201746-999952
202139-999952

SERVICE:
The phone may temporary stop charging.
•

•
•
•
•

* The charging power to be delivered by the WPC is always decided by the phone. As the phone
gets warmer it will request less power from the WPC. If the phone gets too hot, it will not request
any power from the WPC and the charging will temporarily turn off. This typically happens around
43-55 degrees Celsius.
If the sun is shining on the black charger plate when the car is parked, it can then quickly transfer the
heat to the phone.
If several apps are active at the same time when the phone is charging, it will get warm quicker. It
may also slow down the charging time.
* Once the battery is full, some phones (mostly Androids) communicate to the WPC that the battery
is full, resulting in that the phone will not be charged for 20 min. This time was changed from the
previously used 5 min, via SW release 21w50.
* The phone may stop charging if it slides a little (when braking or turning, etc.) but starts charging
again within seconds. This is because the WPC has multiple coils and when the phone changes
position, the WPC checks which of these coils can provide the best charging for the new position.

* Key search:
• CEM module checks that the key remote control is in the car every 14.5 minutes (on the same
frequency that WPC uses). When this happens, charging is interrupted 1 second.
• Opening of doors. WPC is turned off a few seconds due to Key search.
• Only XC40 BEV and C40; If you enter the car, hold your foot on the brake pedal and stand still in
Park mode, Key search is in progress, which shuts down the WPC as long as you press the brake
pedal. If you go to Drive mode, this will not happen anymore. (If you then stop the car and go back
to Park mode, WPC will not be shut down again.)
• * If the hatch in front or the back of the charging plate is open (SPA), the phone can slide and come
in an intermediate position with no charging and no reminder that charging is off.
Page 2 of 4

2023-03-02

Technical Journal 36125.3.0
•
•
•
•

•

Some phone cases has a built in metal plate or magnetic plate. In that case the charging will not work
at all.
The general advice is to not use any phone case at all when charging.
* For some phone brands, if a USB cable is connected to the phone it will not charge wirelessly.
*The symptom that iPhone 12/13/14 sometimes does not charge, has to do with the construction of
the iPhone, not the WPC. The iPhone 12/13/14 has a built in magnet array that are supposed to align
Apple’s own WPC table charger with the phone for best charging (see attachment). Since iPhone
12/13/14 is not QI certified, we cannot ensure the full compatibility and functionality with our WPC.
The WPC in the listed car models has a foreign object detection (FOD) function which detects the
magnet array in the iPhone 12/13/14 models as a foreign object and therefore shuts off the charging
(as a safety precaution). The WPC software released 21w27 has improved this issue. If not already
done, perform a software upgrade as per TJ 31543 (this does not apply for XC40 with fuel engine,
those has another type of WPC). The WPC software is included in Total Upgrade, Service 2.0 and
PDS Upgrade packages.
However, the phone can still get too warm during charging. The phone itself will regulate this and
stop charging until it has cooled down.
The APMS (Airborne Particulate Matter Sensor) generation 2 can cause charging interruptions,
where WPC charging stops and starts very frequently. This is because APMS and WPC is on the
same LIN-bus. SW update from 21w50 (APMS is standard in China, on other markets optional.)

No Warranty claims will be accepted for this TJ.
VEHICLE REPORT:
Yes, please submit a Vehicle Report if the service solution described in this TJ has no effect. Use concern
area “Vehicle Report” and sub concern area “Support not needed”, use function group 3942.

To view TJ attachment continue to next page. This TJ has one attachment.

2023-03-02

Page 3 of 4

Technical Journal 36125.3.0

Page 4 of 4

2023-03-02