Polestar

Service and Parts Business

Technical Journal
TITLE:

Backup Battery DTC TCAM-U210993
REF NO:

ISSUING DEPARTMENT:

CAR MARKET:

TJ 35602.5.0

Technical Service

United States and Canada

PARTNER:

ISSUE DATE:

STATUS DATE:

3 US 7515 Polestar

2023-01-11

2023-01-11

FUNC GROUP:

FUNC DESC:

3943

Telematics

Page 1 of 6

Attachment
File Name

File Size

TJ 35602.png

5.8222 MB

TJ35602BUB.jpg

0.2417 MB

TJ35602BUB - reset.jpg

0.1473 MB

Rows beginning with * are modified
Note! If using a printed copy of this Technical Journal, first check for the latest online version.
DESCRIPTION:
*Change in Vehicle Type.
If there is a warning message in the DIM and CCD about “eCall service required” together with DTC
TCAM-U210993 pointing out the BUB, please follow the procedure under “Service”.
This symptom may also appear directly after a SW update due to trigger level when DTC is set was
increased from 10% SOC in BUB to 30% SOC in BUB in the new TCAM SW that was released 2020,
week 43.
DIM = Driver Information Module
CCD = Center Console Display
BUB = Backup Battery
TCAM = Telematic Connectivity Antenna Module
SOC = State Of Charge
SW = Software

Produced and printed in the USA and available as an electronic document.
© Polestar 2023

Technical Journal 35602.5.0
CSC Customer Symptom Codes
Code

Description

6K

Mobile app Volvo Cars/Activation problems

6O

Mobile applications Polestar Connect/Communication problems

6P

Polestar Connect/Does not work

DTC Diagnostic Trouble Codes
Control Module

Code

Fault Type

TCAM

U210993

Intermittent

Vehicle Type
Type

Eng

Eng
Desc

Sales Body

Gear

Steer Model Year

534

Plant

2021-2023

Chassis range

Struc Week
Range

-

202007-202352

SERVICE:
Improved TCAM SW was released 2020, week 43.
If the message together with the DTC is confirmed, the cause may be a discharged BUB. Do not
replace the BUB, first check if it is possible to charge it.
Vida has been updated with a new method that allows charging of the BUB.
Start with performing a software upgrade in accordance with TJ 35361.
VIDA method:
•
•
•
•
•
•

A 12 volt battery maintainer must be connected to the vehicle throughout the BUB charging
procedure.
Gear selector must be in P - Park.
If BUB SoC is 1% or greater, charge the BUB using the Vida script, see attachment TJ35602BUB.
BUB will charge by 5% SOC per hour, charge the BUB up to minimum 45% SOC. (After charging is
stopped the BUB SOC may drop a little)
If “eCall Service Required” is still shown in DIM, then go to “SW Installation” tab in VIDA, click on
“Advanced test” and click on “Reset”
Once reset has completed, erase DTCs.

If the DTC is set again then charge the BUB to above 50% SOC.
BUB is continuously charged while the vehicle is driven.
NOTE:
If BUB SOC is 0% (below 2 Volt) it is not possible to charge the BUB and it needs to be replaced, see
VIDA instruction VCC-516696-1.
After replacement the BUB SOC must be reset by using a VIDA script, see attachment
TJ35602BUB - reset.

Page 2 of 6

2023-01-11

Technical Journal 35602.5.0
Alternative method to quick charge the BUB using an battery charger:
It is possible to charge the BUB outside the vehicle using a universal battery charger suitable for 1 cell
lithium-ion battery which supplies max 4V and max 1A, the max temperature must not exceed 60°C /
140°F. (There is no suitable Volvo charger for this operation)
To make an adapter harness to connect to the BUB, you need following parts:
1x 31450330 RECEPTACLE HOUSING.
2x 30656678 REPAIR TERMINAL.
Connect terminals to:
Pin 1 Positive.
Pin 4 Negative.
See attached picture “TJ 35602.png”.
Warranty claim info:
To get warranty claim accepted for a job described in this TJ, please use following data:
VST OP number: 36050-2, 39753-2.
VST Operation Number
VST Operation Number

Description

36050-2

Calibrating/Identifying with VIDA

39753-2

TCAM back-up battery replace

LABOR TIME:
36050: 0.2 hrs
39753: 0.3 hrs
VEHICLE REPORT:
Yes, please submit a Vehicle Report if the service solution described in this TJ has no effect.
Use concern area “Vehicle Report Polestar” and sub concern area “Support needed Polestar”, use
function group 3943 and the title; eCall -Service required.
The helpdesk will assist via remote take-over to activate the charging sequence.
Information to NSC:
For helpdesks with possibilities to use DSA.
Method to charge the BuB in the workshop.
Connect battery support to the car.
Via remote take-over, use DSA and check BuB SOC via DID 22 D0 86.
If SOC is 0% (2V) it is not possible to charge the BuB and it needs to be replaced.
If SOC is above 0%, it is possible to let the car charge the BuB via TCAM by using this sequence.
Unlock VGM firewall:
1. 10 03 - Extended session
2. Go to “tools” and then press security access
3. select VGM, area 15 and enter PIN=”FF FF FF FF FF”

2023-01-11

Page 3 of 6

Technical Journal 35602.5.0
Sequence to activate Usage Mode Driving (CEM):
1.
2.
3.
4.
5.
6.
7.

10 03 - Extended session
22 F1 86 - Confirm Extended session
Go to “tools” and then press security access
select CEM, area 03
use PIN=”43 45 4D 30 33”
2F DD 0A 03 0D - UM Driving
22 DD 0A - Confirm UM=Driving

TCAM sequence to check so BuB is charging:
1.
2.
3.
4.

22 FE 47 - Read BuB status (0=Not charging, 1=Charging)
If BuB status=0, Send: 31 01 DD 00 01 - Force BuB charge
22 FE 47 Confirm BuB status=1
22 D0 86 Read BuB state of charge

TCAM will charge the BuB under following conditions:
Battery temp (BuB):