2019 Seat Mii electric engine

Driving
 - Neutr
al
The el ectric drive system is in the neutral po-
sition. No movement is transmitted to the
wheels and the braking effect of the electric
engine does not occur.
 – Permanent forward drive position
The electric drive system is in the normal pro-
gramme (brake energy recuperation levels
0-3).
 – Very intense brake energy recupera-
tion
Very intense brake energy recuperation is de-
celeration phases (brake energy recupera-
tion level 4).

Drive system and driving
Note
If the selector lever is left for a long time in
a position other than P with the ignition off ,
the 12-v
olt battery may discharge. Driving with an automatic gearbox
Driving down slopes
The st
eeper the sl

ope, the higher the selected
brake energy recuperation level will have to
be. A high recuperation level increases the
braking effect of the electric engine. Never let
the vehicle roll downhill with the selector lev-
er in the neutral position N.

Driving
When   or  profiles are selected, the
corr esponding inscription remains on in the
selection button of the driving profile
››› Fig. 139.
Characteristics of driving profiles This driving profile is always adjusted
when the drive system is connected. All
the power of the electric engine is avail-
able. The Climatronic works in normal
mode. When the Normal profile is selec-
ted, the Driving Mode Normal mes-
sage appears on the instrument panel
display.
In the ECO driving profile, the power of
the electric engine is limited to favour
lower energy consumption. The maxi-
mum speed is reduced. The Climatronic
switches to Eco mode, optimal for low
consumption, in which the fan and the
defrosting/demisting functions are still
available. When the ECO profile is selec-
ted, the Driving Mode Eco message
appears on the instrument panel dis-
play.
In the ECO+ driving profile, the power
of the electric engine is limited even
more to favour even lower energy con-
sumption. The maximum speed is re-
duced. The heating and cooling func-
tions of the Climatronic are disconnec-
ted; the fan and the defrosting/demisting
functions are still available. When the
Normal
ECO
ECO+
ECO+ profile is selected, the Driving
Mode Eco message appears on the in-
strument panel displ
ay. WARNING
The driving properties may change de-
pending on the sel ect

ed driving profile.
Never allow the selection of the driving pro-
file to induce you to take any risk that com-
promises safety.

Driving
WARNING
Observe the safety warnings ››
› in Con-
tr ol and w
arning lamps on page 70. Brake assist systems
Electronic Stability Control (ESC)*
The ESC helps t
o impr

ove safety. It reduces
the tendency to skid and improves the stabili-
ty and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehicle
by braking individual wheels or by reducing
the engine torque. The warning lamp will
flash on the instrument panel when the ESC is
intervening !.
The ESC includes the anti-lock brake system
(ABS), the hydraulic brake assist (HBA), the
traction control system (ASR) and the elec-
tronic differential lock (EDS)
ESC also helps stabilise the vehicle by
changing the torque.
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up un-
der braking until the vehicle has reached a
virtual standstill. You can continue to steer the
vehicle even when the brakes are on full.
Keep your foot on the brake pedal and do not pump the brakes. You will feel the brake pedal
pul
sat

e while the ABS is working.
If the running gear or brake system is modi-
fied, the effectiveness of the ABS could be se-
verely limited.
Hydraulic Brake Assist (HBA)*
The brake assist system can reduce the re-
quired braking distance. The braking force is
automatically boosted if you press the brake
pedal quickly in an emergency. You must
keep pressing the brake pedal until the dan-
ger has passed.
Traction control system (ASR)
In the event of wheelspin, the traction control
system reduces the engine torque to match
the amount of grip available. This helps the
car to start moving, accelerate or climb a
gradient.
Electronic differential lock (EDL)*
When the EDL detects wheelspin, it brakes
the spinning wheel and directs the power to
the other driven wheel. This function is active
up to approximately 100 km/h (62 mph).
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automati-
cally if subjected to excessive loads. The ve-
hicle can still be driven. The EDL will switch on
again automatically when the brake has
cooled down. Electronic brake pressure distribution
(EBV)
In all vehicl
es, when the brakes are applied,
the centre of gravity of the vehicle moves for-
ward. As a consequence, there is a danger
that the rear wheels may lock due to their low
traction. The electronic brake pressure distri-
bution controls the brake pressure for the rear
wheels and ensures that this pressure is dis-
tributed optimally between the front and rear
axles. Under normal circumstances it pre-
vents the rear part of the vehicle from skid-
ding due to excessive braking of the rear
wheels. The function of the electronic brake
pressure distribution is incorporated in the
ABS function.
Electromechanical brake servo (eBKV)
With the ignition switched on, the electrome-
chanical brake servo supports the force of
the foot by increasing the pressure that the
driver exerts on the brake pedal. After discon-
necting the ignition, the assistance of the
brake servo is progressively reduced. Once
stopped, immobilise the vehicle to prevent it
from moving ››› page 159.
If the electromechanical brake servo does
not work, the yellow control lamps

Braking and parking
If the electromechanical brake servo is not
w orking, the br
ake pedal must be pressed
harder, as the braking distance increases due
to the lack of assistance from the servo brake.
Brake blending
The brake energy recuperation can generate
a braking effect ››› page 139. This braking ef-
fect depends on the selected driving pro-
gramme and the level of charge of the high-
voltage battery. If the braking effect caused
by the recuperation is very intense, the vehi-
cle’s brake lights with turn on. The electric en-
gine, when operating as an alternator, can
generate braking torque on the front wheels
based on the RPM and the temperature and
charge level of the high-voltage battery.
These variable parameters cause fluctuating
electric decelerations which are hydraulical-
ly compensated according to the driver’s de-
sires. This function is called “brake blending”
and it combines mechanical braking with the
engine brake effect. WARNING
Driving at high speed on icy, slippery wet
gr ound can r

esult in loss of vehicle control
and serious injury to the driver and passen-
gers.

High-voltage battery
Practical tips
High-v olt
age battery
Safety warnings relating to the high-voltage network and the high-voltage battery Introduction Fig. 146
Warning signs (schematic representa-
tions):  High-v olt

age components.  General
high-voltage warning sign.  High-voltage battery
warning sign. Fig. 147
When charging, in the engine com-
partment: hot surf ace w

arning. Overview of the high-voltage system
The high-v
olt

age system is made up by,
among others, the following components:

Practical tips

Its lights up yellow. A text mes-
sage will al
so appear on the in-
strument panel displ
ay.
The Eco or Eco+ driving pr ofil
e will be active. The
power is reduced and certain consumers are auto-
matically switched off, such as the air conditioning
system. The vehicle may already be travelling in re-
serve mode.
The high-voltage battery charge has reached the re-
serve level. The vehicle autonomy will only be of a
few kilometres.
Charge the high-voltage battery immediately. 
Its lights up yellow.
The power is reduced and there is very little autono-
my.
A t e

xt message will also appear on the instrument
panel display.
The maximum driving speed is limited to 80 km/h (50
mph). The Eco+ driving profile will be activated.
The high-voltage battery is discharged. There is only
sufficient autonomy for a few hundred metres. Stop
the vehicle in a safe place. Charge the high-voltage
battery immediately. The control lamps light up together when the
ignition is s
wit

ched on and should turn off af-
ter approximately 2 seconds. This is the time
taken for the function check. WARNING
Observe the safety warnings ››

› in Con-
tr ol and w
arning lamps on page 70. Introduction
Fig. 148
On the vehicle floor: location of the
high-v olt

age battery. The vehicle’s electric engine is operated by
the high-v
olt

age battery, which is located on
the vehicle floor ››› Fig. 148.
The high-voltage battery can be charged im-
mediately or in a deferred manner
››› page 172. Always bear in mind the safety
warnings ››› .
Bef or

e charging the battery, disconnect the
drive system ››› page 142.
Charge options

Practical tips
Verification and replace-
ment Engine compar tment
Saf
ety warnings for performing
works in the engine compartment The engine compartment of the vehicle is a
danger
ous ar

ea. You should only perform
works in the engine compartment if you have
good knowledge of the necessary operations
and the general safety measures, and if you
have adequate tools, means and operating
fluids. Works performed inadequately, could
lead to serious injuries ››› . In this case, seek
a specialised w orkshop t

o perform all the
works. SEAT recommends visiting a SEAT
dealership for this.
Before performing any work in the engine
compartment, always park the vehicle on
level and firm ground, taking all necessary
safety precautions.
Only specialised workshops qualified ac-
cording to the SEAT guidelines are authorised
to perform works on the high-voltage system
››› .
WARNING
The voltage of the high-voltage system and
of the high-v olt

age battery could be fatal! Touching damaged high-voltage cables
(or
ange col

our) and the high-voltage bat-
tery could cause an electrical shock with
deathly consequences. The high-voltage
system may be active even with the ignition
disconnected!