NHTSA ID Number: 11016900
Manufacturer Communication Number: TJ 34295
TSB/Document Date: 2025-04-09
Summary
This is a Technical Journal: High Voltage Battery
repairs. Always repair the battery according to the methods in VIDA.
Volvo Car USA LLC
Technical Journal
Technical Journal Title
Ref. No.
PHEV High Voltage Battery Repairs
TJ 34295.8.0
Issuer (Dept.)
Issue Date
Status Date
11/6/24
3/14/25
Technical Service
Car Market
Partner
Function Group
United States and Canada
3 US 7510 Volvo Car USA
3113
Function Description
Page
Battery, high voltage
Page 1 of 9
Attachment
File Name
File Size
HVB - Cell_Voltage_Overview [Read-Only].pdf
1.1132 MB
SP list 34295.PNG
0.0636 MB
Rows beginning with * are modified
Note! If using a printed copy of this Technical Journal, first check for the latest online version.
DESCRIPTION:
* Updated SP list
PHEV - Plug-In Hybrid Electric Vehicle
This TJ is a guide for what kind of repairs can be done instead of complete HV battery replacement.
Parts, methods & tools are now available to repair almost all faults within the High Voltage Battery.
CSC Customer Symptom Codes
Code
Description
2V
Technician information/Software/Vehicle communication/Not for warranty use
DTC Diagnostic Trouble Codes
Vehicle Type
Chassis
range
Struc Week
Range
2019-2022
-
201917-999952
B1FPHEV
2019-2022
-
201917-999952
2019-2022
-
201917-999952
BR
B1FPHEV
2019-2022
-
201917-999952
238
BC
B1BPHEV
2018-2022
-
201717-999952
238
BR
B1FPHEV
2018-2022
-
201717-999952
246
BK
B1LPHEV
2020-2022
-
201917-999952
Type
Eng
224
BK
224
BR
225
BK
225
Eng
Desc
Sales
Body
Gear
Steer
Model Year
Plant
Technical Journal 34295.8.0
Type
Eng
Eng
Desc
Chassis
range
Struc Week
Range
246
BR
B1FPHEV
2018-2022
-
201717-999952
256
BC
B1BPHEV
2016-2017
-
201546-201717
256
256
BK
B1LPHEV
2020-2022
-
201917-202147
BR
B1FPHEV
2018-2022
-
201717-202147
Sales
Body
Gear
Steer
Model Year
Plant
SERVICE:
With any HVB (High Voltage Battery), you must be certified to carry out HVB repairs to
the correct competence. Always repair the battery according to the methods in VIDA. When
performing any measurements, it is important that the AA batteries in the measuring tool are above
75% charge minimum. This is confirmed when you turn the meter on, briefly displaying a value.
Before you start measuring it is good to check how the tool displays short to ground and open loop.
In the rare event that a complete battery is to be replaced, the battery being installed may not have
the same cell chemistry as the battery being removed.
*A unique SP (Software Product) may be necessary, see attachment “Sp list 34295.pdf”.
The SP (Software Product) changes the Variant Attribute in the vehicle to match that of the
replacement battery.
The information of what battery is installed in the vehicle can be found in VIDA, Vehicle details,
Variant attribute, and then searching “High Voltage Battery”.
*Note: The SP must be installed in the following order:
1. Replace battery
2. Install SP
3. Install BECM reload
Cell Module: This part is most often used when one cell is defective. The most common cell defects
are seen as one cell having a lower Open Circuit Voltage (OCV) and State of Charge (SoC) than all
other cells. Normal SOC deviation is less than 5%, more than 10% is a fault. The cell module is
delivered complete with temperature sensors and a Cell Voltage and Temperature Node. Examples
are attached in “HVB - Cell Voltage Overview”
Cell modules are available for the following variants:
•
•
MY 2018-2019 SPA P30
MY 2020-2021 SPA P34
Note that cell module replacement is also the recommended repair for:
•
MY 2016-2017 SPA where the original P27 battery has been previously replaced with a P30
battery.
Cell module replacement is not available for:
•
MY 2016-2017 SPA P27 battery
Page 2 of 9
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Technical Journal 34295.8.0
Service Kit: This kit is helpful to have on hand when replacing a cell module in the event that a cable,
clip, or seal is damaged during the repair.
Coolant level: After repair or reassembly of the cooling system, it is important to refill and bleed the
high-voltage coolant circuit correctly according to VIDA. It takes some time for the cooling system to
stabilize. After thoroughly road testing the vehicle, the coolant level should be visually checked once
more.
CVTN (Cell Voltage and Temperature Node): This part is used when there is a DTC (Diagnostic
Trouble Code) confirming an internal fault. It is also used when there is a measurement error, for
example, several adjacent cells show incorrect cell voltage. Examples are attached in “HVB - Cell
Voltage Overview”
Fuses: These are used when a Diagnostic Trouble Code is set for an open fuse.
The root cause for the open fuse needs to be fault traced and corrected before replacing the fuse.
Coolant Temperature Sensor: This part is used when the temperature sensor does not read
accurately. Check the accuracy by allowing the car to soak for several hours, preferably overnight.
The signal can then be checked for an offset by comparing it to other sensors in the car. Use a
VIDA Diagnostic Sequence or choose a selection of temperature sensors from various nodes in the
vehicle.
BDU (Battery Distribution Unit): This part is most often used when a Diagnostic Trouble Code
is set for one or more stuck contactor(s). It can also be used when a diagnostic trouble code is
set for the current sensor. A stuck contactor can be confirmed by following Vida and using the
measurement tool.
BECM (battery energy control module): This part is most often used when a Diagnostic
Trouble Code is set for an internal fault or the unit does not communicate on the CAN bus. When
a battery energy control module becomes non-responsive during a software download, it is often
not necessary to replace it. It can usually be recovered using VIDA Software Advanced Test. If the
battery energy control module cannot be recovered using VIDA, create a Vehicle Report, Support
Needed.
Circuit board: This part is most often used when there is an intermittent or permanent open in one
of the circuits, such as the power, ground, CAN, interlock, or Supplemental Restraint System Airbag
system (SRS). In most cases, however, the actual fault is in the vehicle wiring outside the battery
itself.
Gasket: It is not necessary to replace the gasket each time the battery is opened, but it is required
to perform the leakage test in VIDA after a repair.
Isolation test: It is not necessary to perform an isolation test for all hybrid issues.
It is necessary when specifically instructed to do so according to the fault tracing or repair method.
When performing measurements, it is important that the AA batteries in the tool are above 75%
charge.
2025-03-14
Page 3 of 9
Technical Journal 34295.8.0
This is confirmed when you turn the meter on, briefly displaying a value.
Before you start measuring familiarize yourself with how the tool displays short and open circuits.
VEHICLE REPORT:
Yes, please submit a Vehicle Report if the service solution described in this TJ has no effect. Use
the concern area “Vehicle Report” and the sub-concern area “Support Needed”, use function group
3113.
To view TJ attachments continue to next page. This TJ has two attachments.
Page 4 of 9
2025-03-14
Technical Journal 34295.8.0
2025-03-14
Page 5 of 9
Technical Journal 34295.8.0
Example of Cell Fault
Page 6 of 9
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Technical Journal 34295.8.0
Example of Cell Fault
2025-03-14
Page 7 of 9
Technical Journal 34295.8.0
Examples of CVTN faults
Page 8 of 9
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Technical Journal 34295.8.0
2025-03-14
Page 9 of 9
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TSB/Document ID: TJ 34295
Replacement Service Bulletin Number:
MFR Communication Date: 2025-03-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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