VOLVO CAR

SERVICE AND PARTS BUSINESS

Technical Journal
TITLE:

High Voltage battery maintenance for T8 vehicles on display
REF NO:

ISSUING DEPARTMENT:

CAR MARKET:

TJ 32009.2.0

Technical Service

United States and Canada

PARTNER:

ISSUE DATE:

STATUS DATE:

3 US 7510 Volvo Car USA

2017-05-17

2017-05-23

FUNC GROUP:

FUNC DESC:

3113

Battery, high voltage

Page 1 of 5

“Right first time in Time”
Attachment
File Name
BECM_Fuses.jpg
Usage_Modes.pdf

File Size
0.1412 MB
0.0229 MB

Vehicle Type
Type

Eng

2XX
2XX

BC
BR

Eng
Desc

Sales

Body

Gear

Steer

Model Year
2016-2017
2018-9999

Plant

Chassis range
-

Struc Week
Range
201526-201716
0-0

CSC Customer Symptom Codes
Code
YN

Description
High voltage battery/Discharged/poor charge

VST Operation Number
DTC Diagnostic Trouble Codes
Rows beginning with * are modified
Note! If using a printed copy of this Technical Journal, first check for the latest online version.

Produced in the USA and available as an electronic document. Hard copy documents are printed in USA on recycled paper containing
a minimum of 50% wastepaper and 10% post-consumer waste.
© 2017 VOLVO CAR USA, LLC

Technical Journal 32009.2.0
Text
DESCRIPTION:
A hybrid vehicle in Active Usage Mode uses a small amount of energy from the high voltage battery.
See attachment for Usage Mode description. Usage_Modes.pdf
Over an extended period of time, this could lower the cell voltages and eventually degrade the battery.
SERVICE:
Periodically check the high voltage battery state of charge and keep it at or above 25% as per the
instructions in the owner’s manual for “Long-term storage of vehicle with hybrid batteries”.
* Fuses BF07 and BF10 can be removed from vehicles on display to prevent low cell voltage.
BECM_Fuses.jpg
VEHICLE REPORT:
N/A

To view TJ attachments continue to next page. This TJ has two attachments.

Page 2 of 5

2017-05-23

Technical Journal 32009.2.0

2017-05-23

Page 3 of 5

The vehicle has a number of different states called usage modes. The vehicle automatically switches between the usage modes depending on user interaction and also control module activity.
The usage modes are the modern equivalency of the different ignition positions that a mechanical key switches between. However, the
usage modes are more comprehensive and more complex.
The main purpose of usage modes is to assure that the vehicle is always left in its lowest energy consumption state, even if the user
forgets and neglects instructions to turn off the vehicle.
The different usage modes
The different usage modes are described in the table below. It is primarly user interaction that triggers an usage mode transistion.

Usage mode

Description

Driving

In driving mode, the drivetrain and thereby propulsion functionality
is activated and ready to give torque. Driving mode gives full functional availability. The Electrical Energy and Power Management
EEPM reduces load if there is not enough electric power and/or
energy in the vehicle. A valid key must be detected and approved.

Convenience

In convenience mode, a number of convenience functions are
available to the user. The usage of these functions is limited by
the Electrical Energy and Power Management EEPM, an engine
start is not allowed if there is not sufficient electric energy available. A valid key must be detected and approved.

Active

In active mode, most functions are available, except the drivetrain. Braking functionality is prioritized, along with external lights,
in order to provide safe functionality if the vehicle is being towed.
The Electrical Energy and Power Management EEPM reduces
load if there is not enough electric energy available, for example
during a driver start request. A valid key must be detected and approved.
Note!
The active mode is not intended to be used during normal
customer usage, but during towing, service or similar.
Therefore this mode requires more input from the driver
before it is entered. The mode is not intended to be accessed without a special request from the driver.

Inactive

Inactive is a resting mode. The functional availability is kept to a
minimum by only allowing functions that may have after-run activities. There is a well-defined timeslot for functions and systems
to coordinate shutdown events. A limited number of functions are
inactive but waiting to be activated by the user, such as the radio.
A valid key is not needed to access this usage mode. The Electrical Energy and Power Management EEPM reduces load or not
allow activation of some functions in order to ensure start of the
vehicle. A valid key is not needed to access this mode.

Abandoned

Abandoned is a resting mode which is typically entered after a
certain time is spent in inactive mode. There is no or minimal network activity in this usage mode. The purpose is to shut down
functions that may be on standby, awaiting input or activation, or
periodically checking for incoming data.
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Transitions
Note!
A detailed description of each transition is not included, since the transitions can vary with vehicle setup and can also
change further on in the platform lifetime. These transition descriptions are only examples.

Transition

Description

1. Abandoned to inactive

The vehicle transitions from abandoned to inactive when detecting that an authorized user iintends to use the vehicle. This includes, but is not limited to, unlocking the vehicle, using connectivity, air conditioning, and diagnostic readout.
Usage mode abandoned can only be reached from usage mode
inactive.

2. Inactive to convenience

Convenience mode can only be reached from inactive mode.
Transition from abandoned goes via inactive. Transitions directly
from either active or driving is not possible since turning the ignition knob towards thestop position from those two states is interpreted as "turn off vehicle". This means that two separate turns
are required to reach convenience from active or driving.

3. Convenience or inactive to active

Transition to active is only possible from inactive and convenience
by turning the ignition knob towards the start positionand hold it. .
Active is not a normal customer mode, but a towing, or service
mode.

4. To driving

Usage mode active keeps the last known value until the transition
to driving is fulfilled. Necessary power supply logic must be activated to allow the engine system to begin its startup sequence.
Activating power supply logic to prepare for start will then be done
in the usage mode where the driver start request is made. The
activation of necessary power supply logic is triggered by an internal signal that indicates that a driver has requested a start of the
vehicle.

5. Driving to inactive

The current usage mode directly transition to inactive when turning the vehicle off. If the vehicle is moving or the gear is not in P
(park), it is required to turn the ignition knob to the stop position
and hold it.

6. Convenience to inactive

The vehicle can be automatically shut down to save the battery if
the user forgets to shut it down. Before that, the driver is advised
to shut the vehicle down and thereby switching to usage mode
inactive, This transition is only possible when the energy level of
the battery is low, but still sufficient to withstand the energy drainage of an engine start. Remote looking will also cause transition
to usage mode inactive.

7. Inactive to abandoned

After a period of time without interaction from the driver or vehicle
systems the usage mode transitions from inactive to abandoned.

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