oil pressure AUDI TT ROADSTER 2016 Owners Manual

Downloaded from www.Manualslib.com manuals search engine Table
of Contents
Audi smartphone interface . . . . . . 210
Setting up.......................... 210
How to use . . . . . . . . . . . . . . . . . . . . . . . . . 211
Troubleshooting..................... 211
System settings .................. 212
Setting the time and date . . . . . . . . . . . . .
212
MMI settings . . . . . . . . . . . . . . . . . . . . . . .
212
Connection manager . . . . . . . . . . . . . . . . .
213
System update . . . . . . . . . . . . . . . . . . . . . .
216
On-board Handbook.................. 216
Sound settings . . . . . . . . . . . . . . . . . . . . . .
217
Volume settings ..................... 217
Restarting the MMI system (Reset) . . . . . 218
Notes on software licences 218
Safety ............................ 220
Safe driving . . . . . . . . . . . . . . . . . . . . . . 220
General notes . . . . . . . . . . . . . . . . . . . . . . .
220
Correct sitting positions . . . . . . . . . . . . . . 221
Child seats . . . . . . . . . . . . . . . . . . . . . . . . .
223
Securing a child seat . . . . . . . . . . . . . . . . .
225
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Stowing luggage safely . . . . . . . . . . . . . . .
227
Pedestrian protection system . . . . . . . . . . 228
Seat belts . . . . . . . . . . . . . . . . . . . . . . . .
230
Why is it so important to use seat belts? . 230
Forces acting in a collision . . . . . . . . . . . . .
231
How to wear seat belts properly . . . . . . . .
232
Belt tensioners . . . . . . . . . . . . . . . . . . . . . .
234
Airbag system . . . . . . . . . . . . . . . . . . . . 235
Description of airbag system . . . . . . . . . . .
235
Front airbags . . . . . . . . . . . . . . . . . . . . . . .
236
Side airbags . . . . . . . . . . . . . . . . . . . . . . . .
239
Service and care . . . . . . . . . . . . . . . . . . 241
Checking and topping up fluids . 241
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Filling the tank . . . . . . . . . . . . . . . . . . . . . . 242
Emission control systems . . . . . . . . . . . . . 244
Engine compartment . . . . . . . . . . . . . . . . . 244
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . .
247
Cooling system . . . . . . . . . . . . . . . . . . . . . .
249
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . .
250
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . .
250
4 Windscreen
washer . . . . . . . . . . . . . . . . . .
252
Service interval display . . . . . . . . . . . . . . .
252
Wheels ........................... 254
Tyres and rims . . . . . . . . . . . . . . . . . . . . . .
254
Tyre pressure loss indicator . . . . . . . . . . . . 258
Tyre pressure monitoring system . . . . . . .
260
Care of vehicle and cleaning . . . . .
263
General notes . . . . . . . . . . . . . . . . . . . . . . .
263
Washing the vehicle . . . . . . . . . . . . . . . . . .
263
Notes on cleaning and care . . . . . . . . . . . . 264
Taking the vehicle out of service . . . . . . . . 268
Self-help . . . . . . . . . . . . . . . . . . . . . . . . .
269
Mobility . . . . . . . . . . . . . . . . . . . . . . . . . . 269
General notes . . . . . . . . . . . . . . . . . . . . . . .
269
Equipment . . . . . . . . . . . . . . . . . . . . . . . . .
269
Tyre repair kit . . . . . . . . . . . . . . . . . . . . . . .
270
Changing a wheel . . . . . . . . . . . . . . . . . . . .
272
Spare wheel . . . . . . . . . . . . . . . . . . . . . . . .
276
Jump-starting . . . . . . . . . . . . . . . . . . . . . . .
277
Tow-starting / towing away. . . . . . . . . . . . 278
Fuses and bulbs . . . . . . . . . . . . . . . . . .
282
Fuses.............................. 282
Bulbs.............................. 284
Accessories and technical data . . 285
Accessories and modifications
to the vehicle . . . . . . . . . . . . . . . . . . . . . 285
Accessories, replacement parts and
repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Modifications . . . . . . . . . . . . . . . . . . . . . . . 285
Radio transmitters and business
equipment . . . . . . . . . . . . . . . . . . . . . . . . . 286
Technical data . . . . . . . . . . . . . . . . . . . . 287
Vehicle identification
data . . . . . . . . . . . . . 287
Explanation of technical data . . . . . . . . . . 287
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 288
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . .
288
Engine data . . . . . . . . . . . . . . . . . . . . . . . .
289
Index ............................. 290

Downloaded from www.Manualslib.com manuals search engine 0
0
N
,.....
N
......
0
,.....
Vl
CX) Instruments
and warning/indicator lamps
The tank capacity of your vehicle is given in the
Technical data section ¢ page 288.
CD CAUTION
Never run the tank completely dry. If there is
an irregular fuel supply, misfiring can occur.
Unburnt fuel can then enter the exhaust sys­
tem. This can lead to overheating and dam­
age to the catalytic converter.
Warning and indicator
Lamps
Description
The warning and indicator lamps light up or flash
in the instrument cluster. Their purpose is to in­
dicate functions or faults.
Some of the warning and indicator lamps may be
accompanied by a driver message and a warning
tone. The warning/indicator lamps and driver
messages on the display can be masked by fur­
ther displays. To display a warning or message
again, use the controls on the multi-function
steering wheel to select the display tab for warn­
ing/indicator lamps and messages ¢ page 20.
If several malfunctions have occurred, you can
use the thumbwheel to scroll through them on
the display.
Some of the warning lamps may be displayed in
different colours.
Overview
When you switch on the ignition, some of the
warning and indicator lamps light up briefly to
show that the associated systems are working
properly. These systems are marked with a../ in
the following tables. If one of these warning/in­
dicator lamps does not light up, there is a fault in
the associated system.
Red warning lamps
---------------
Br a k e system ../
¢page 13
Electro-mechanical parking brake
¢page 13 Cooling
system
¢page 14
Engine oil pressure
¢page 14
Alternator
¢page 15
Engine stopped while vehicle is mov­
ing
¢page 15
Seat belt
¢page 15
Electro-mechanical power steering ../
¢page 116
Steering lock
¢page 15
Central warning/indicator lamp
¢page 15
Engine start system
¢page 15
Gearbox malfunction
¢page 83
Rear spoiler
¢page 117
Yellow indicator lamps
Electronic stabilisation control (ES()
../ ¢page 16
Electronic stabilisation control (ES()
../ ¢page 16
Anti-lock brake system (ABS) ../
¢page 16
Safety systems ../
¢page 16
Brake pads
¢page 16
Electro-mechanical parking brake
¢page 13
Tyre pressure
¢page258or¢page260
Tyre pressure
¢page258or¢page260
11

Downloaded from www.Manualslib.com manuals search engine Instruments
and warning/indicator Lamps
rlJ Parking brake: fault. Safely stop vehicle.
Please contact workshop
There is a malfunction in the parking brake. Drive
to a qualified workshop soon and have the fault
rectified.
[i] Hold assist: only available when door is
closed and engine is running
If this message appears, make sure that the door
is closed, the seat belt is buckled and the engine
is running.
[i] Hold assist: unavailable
If this message appears, the system require­
ments have not been met.
� Please release parking brake
If this message appears, release the parking
brake.
� Parking brake auto release: unavailable
If this message appears, press the brake pedal
and then release the parking brake.
� Parking brake: caution! Vehicle parked too
steep
If the warning Lamp flashes and the message ap­
pears, the brake may not be strong enough to
hold the vehicle. The brakes have overheated.
The vehicle can roll away, even on a gentle slope.
� Parking brake is applied
If this message appears, press the brake pedal
and then release the parking brake as necessary.
(D Note
For further information on the parking brake
refer to¢ page 74.
_t Cooling system
• Switch off engine and check coolant level.
See owner's manual
The coolant Level is too Low.
Switch off the engine and do not drive on. Check
the coolant Level¢ page 249.
14 -
If the coolant Level is too Low, add more coolant
¢ page 249. Do not drive on until the warning
Lamp has gone out.
• Coolant temperature: too high. Let engine
run with vehicle stationary
Let the engine cool down by running it at idling
speed for a few minutes until the warning Lamp
goes out.
- Do not drive on if the warning Lamp does not
disappear. Obtain professional assistance.
A WARNING
- Never open the bonnet if you can see or hear
steam or coolant escaping from the engine
compartment; there is a risk of being scal­
ded. Wait until you can no Longer see or
hear escaping steam or coolant.
- The engine compartment of any motor vehi­
cle is a dangerous place. Before carrying out
any work in the engine compartment, switch
off the engine and allow it to cool down.
Please observe the important safety warn­
ings ¢ page 244, Working on components
in the engine compartment.
CD CAUTION
Do not drive on if the warning Lamp. Lights
up; otherwise there is a risk of engine dam­
age.
9::::r. Engine oil pressure
• Switch off engine. Oil pressure too low
Switch off the engine and do not drive on. Check
the engine oil Level ¢ page 247.
- If the engine oil Level is too Low, add more oil
¢ page 247. Do not drive on until the warning
Lamp has gone out .
- If the engine oil Level is OK and the warning
Lamp is flashing, switch off the engine and do
not drive on. Obtain professional assistance.

Downloaded from www.Manualslib.com manuals search engine 0
0
N
,.....
N
......
0
,.....
Vl
CX) Instruments
and warning/indicator lamps
(D) Note
The oil pressure warning lamp is not an indi­
cator for the oil level. The oil level should
therefore be checked regularly.
0 Alternator/vehicle battery
• Electrical system: fault. Battery is not being
charged
There is an alternator fault or a fault in the vehi­
cle's electrical system.
Drive to a qualified workshop without delay.
However, you should avoid using electrical equip­
ment that is not absolutely necessary because
this will drain the battery. If the battery charge is
insufficient, obtain professional assistance.
ri1 Electrical system: low battery charge. Bat­
tery will be charged while driving
Starting reliability may be impaired.
If this message disappears after a while, the ve­
hicle battery will have been sufficiently charged
while driving.
If the message does not disappear again, drive to
a qualified workshop without delay and have the
fault rectified.
� Engine stopped while vehicle is moving
• Engine stopped: brake servo and power
steering not possible
There is a malfunction in the engine or fuel sup­
ply system.
Greater strength is required to steer and brake
the vehicle if the engine stops while the vehicle is
coasting. Carefully try to bring the coasting vehi­
cle safely to a standstill out of the way of moving
traffic. Obtain professional assistance.
_& WARNING
Greater strength is required to brake the vehi­
cle if the engine stops while the vehicle is
moving -risk of accident! Greater strength
will be required to steer the vehicle unless the
power steering is still providing assistance. The
power steering may still be available if
the vehicle is still coasting with the ignition
switched on (and the battery charge is suffi­
cient).
,(,.Seatbelt
The warning lamp.
lights up and does not go
out until the driver's and passenger's* seat belts
have been fastened. When the vehicle has gath­
ered speed you will also hear a warning chime.
(Q)) Note
For further information on the seat belts
¢page 230.
@- Steering lock
• Steering: fault. Please stop vehicle
There is a malfunction in the electronic steering
lock. The ignition can no longer be switched on.
Do not have the vehicle towed away, because you
won't be able to steer it. Obtain professional as­
sistance.
(::$ Steering
lock: fault. Please contact work­
shop
There is a malfunction in the electronic steering
lock.
Drive to a qualified workshop soon and have the
fault rectified.
_& WARNING
Your vehicle must not be towed if there is a
fault in the electronic steering lock -risk of
accident!
& Central warning/indicator lamp
If the warning lamp.
or indicator lamp II
lights up, note the information in the instrument
cluster.
©- Engine start system
• Engine start system: fault. Please contact
workshop ..,.
15

Downloaded from www.Manualslib.com manuals search engine 0
0
N
,.....
N
....
0
,.....
Vl
CX) Trip
recorder/odometer
The trip recorder shows the distance that has
been travelled since it was last reset. It is used to
measure individual journeys.
The trip recorder can be reset to zero by pressing
the reset button lo.al ¢Fig. 12.
The odometer records the vehicle's total mileage.
Fault display
If there is a fault in the instruments, the letters
DEF appear in the trip recorder display. Have the
fault rectified as soon as possible.
On-board computer
You can call up the following information se­
quentially on the on-board computer ¢ page 20,
Fig. 4@ :
-Time & date ¢page 212
-Average consumption
- Fuel range
- Single journey memory summary
- Total journey memory summary
The single journey memory processes the infor­
mation on a journey from the time the ignition is
Sport view Driver
information system
switched on until it is switched off. If the journey
is resumed within two hours after the ignition is
switched off, the new figures are automatically
included in the calculation.
Unlike the single journey memory, the total jour­
ney memory is not erased automatically. In this
way, you can determine the period for which you
wish the on-board computer to supply driving in­
formation.
Fuel consumption
The current fuel consumption can be shown in a
bar display. The average fuel consumption from
the single journey memory can also be displayed.
If the bar turns green, your vehicle is saving fuel
using one of the following functions:
- Recuperation: Electrical energy can be stored in
the vehicle battery (recuperation) if the vehicle
is travelling downhill or coasting in gear (over­
run). In this case, the bar will move towards the
t:::3 symbol.
- Coasting mode* ¢ page 82.
@ Note
The date, time and display format can be
changed via the infotainment system.
Applies to: vehicles with boost pressure display and engine oil temperature display
Fig. 13 Driver information system: Sport view
Always select the desired view in the driver infor­
mation system before starting a journey, because the
display functions will not be available for a
few seconds.
25

Downloaded from www.Manualslib.com manuals search engine Driver
information system
... Select the following on the infotainment sys­
tem: I MEN
U I
button > Car > left control button
> Layout .
... Move the cursor (red frame) to select the de-
sired setting.
The driver information system displays various
components.
(D Tab area
@ Rev counter including digital speedometer
and mileage recorders
@ Secondary display (two separate sections in
extended view)
@ Boost pressure display
® Engine oil temperature display
@ Status line
(J) Function area (central area shifted to left)
Boost pressure display
The current boost level of the engine (that is the
current charge pressure) is indicated by a bar
which moves from left to right.
Engine oil temperature gauge
The display shows ---°Cat low engine oil temper­
atures.
The engine has reached its operating tempera­
ture in normal driving conditions when the oil
temperature is between 80 °C and 120 °C. If the
engine is running under increased load at high
ambient temperatures, the oil temperature may
increase above this value. This is no cause for
concern, provided that the indicator/warning
lamps. ¢page 14 orl! ¢page 18 in the dis­
play do not start flashing.
{(!)) Note
- You can change the measurement units for
temperature or speed, etc. via the infotain­
ment system.
- When the vehicle is stationary or travelling
at very low speeds, the temperature dis­
played may be slightly higher than the ac­
tual outside temperature as a result of the
heat radiated from the engine.
26 -At
temperatures below +5 °( a snowflake
symbol appears next to the temperature
display ¢&. in Overview on page 20.

Downloaded from www.Manualslib.com manuals search engine 0
0
N
,.....
N
......
0
,.....
Vl
CX) -
Do NOT stop the vehicle, drive in reverse or
switch off the engine before you are out of
the water.
- Bear in mind that waves created by oncom­
ing traffic could exceed the permissible
wading depth of your vehicle.
- Avoid driving through salt water (corrosion).
How to improve economy and minimise
pollution
Fuel economy, environmental impact and wear
on the engine, brakes and tyres depend largely
on the way you drive the vehicle. By adopting an
economical driving style and anticipating the
traffic situation ahead, you can reduce fuel con­
sumption by 10-15%. The following section gives
you some tips on lessening the impact on the en­
vironment and reducing your operating costs at
the same time.
Anticipate well in advance
A car uses most fuel when accelerating. If you an­
ticipate hazards and speed changes well in ad­
vance, you will need to brake less and thus accel­
erate less. Wherever possible, let the car slow
down gradually with a gear engaged, for in­
stance when you can see that the next traffic
lights are red.
Change gear early to save fuel
An effective way of saving fuel is to change up
quickly through the gears. Running the engine at
high rpm in the lower gears uses an unnecessary
amount of fuel. Press the accelerator slowly and
avoid using the "kick-down" feature.
Avoid driving at high speed
Avoid travelling at top speed. Fuel consumption,
exhaust emissions and noise levels all increase
very rapidly at higher speeds. Driving at moder­
ate speeds will help to save fuel.
Do not let the engine idle for longer than
necessary
Engine idling periods are automatically reduced
on vehicles with start/stop system*. On vehicles
without start/stop system*, it is worthwhile
switching off the engine at level crossings, for in- Driving
stance, or at traffic lights with a long red phase.
The fuel saved after only 30 -40 seconds is
greater than the amount of fuel needed to re­
start the engine.
The engine takes a very long time to warm up
when it is running at idling speed. Mechanical
wear and pollutant emissions are also especially
high during this initial warm-up phase. It is
therefore best to drive off immediately after
starting the engine. Avoid running the engine at
high speed.
Regular servicing
Regular servicing can establish a basis for good
fuel economy before you start driving. A well­
serviced engine gives you the benefit of im­
proved fuel efficiency as well as maximum relia­
bility and an enhanced resale value.
A poorly maintained engine can consume up to
ten percent more fuel than necessary.
Check the oil level when filling the tank. Oil con­
sumption depends to a great extent on the en­
gine load and engine speed. It is quite normal
that the oil consumption of a new engine only
reaches its lowest level after a certain mileage.
This means that the oil consumption can only be
properly assessed after about 5,000 km.
Avoid short trips
The engine and emission control system need to
reach their proper working temperature in order
to minimise fuel consumption and emissions.
A cold engine uses disproportionately more fuel.
The engine only reaches its working temperature
after about four kilometres, when fuel consump­
tion will return to a normal level.
Check tyre pressures
Always make sure the tyres are inflated to the
correct tyre pressures to save fuel. If the tyre
pressures are just 0.5 bar too low, this can in­
crease the fuel consumption by as much as 5 %.
Due to the greater rolling resistance, under-infla­
tion also increases tyre wear and impairs han­
dling.
67

Downloaded from www.Manualslib.com manuals search engine 0
0
N
,.....
N
......
0
,.....
Vl
CX) A
WARNING
You should switch on the sport mode or
switch off the ESC/traction control system
(ASR) only if your driving ability and the traf­
fic conditions allow you to do so safely -dan­
ger of skidding!
- The stabilising function is restricted when
sport mode is switched on. The driven
wheels may start to spin, causing the vehi­
cle to lose grip, in particular on slippery or
wet roads.
- When the ESC/traction control system
(ASR) is switched off, the vehicle will not be
stabilised.
@ Note
- The ESC/traction control system (ASR) can­
not be switched off and the sport mode can­
not be switched on when the cruise control
system* is on.
- In the event of a malfunction in the rear
spoiler system or the Audi magnetic ride, it
may not be possible to switch off the ESC/
ASR or switch on the sport mode.
Brakes
New brake pads
New brake pads do not give full braking effect for
the first 400 km, they must first be "bedded in".
However, you can compensate for the slightly re­
duced braking effect by applying more pressure
on the brake pedal. Avoid placing a heavy load on
the brakes during the running-in period.
Wear
The rate of wear on the brake pads depends a
great deal on how you drive and the conditions in
which the vehicle is operated. Negative factors
are, for instance, city traffic, frequent short trips
or hard driving with abrupt starts and stops.
Noises
Brake noise may develop in certain situations, de­
pending on the speed, braking force and ambient
conditions (such as temperature and relative hu­
midity). Intelligent
technology
Effect of moisture and salt
In certain conditions, such as in heavy rain, early
morning dew, or after washing the car or driving
through water, the full braking effect can be de­
layed by moisture (or in winter by ice) on the
discs and brake pads. The brakes should be
"dried" by pressing the pedal to restore full brak­
ing effect.
When you are driving at higher speeds with the
windscreen wipers on, the brake pads are very
briefly brought into contact with the brake discs.
This automatic process which goes unnoticed by
the driver is carried out at regular intervals and is
intended to improve braking response in wet con­
ditions.
The effectiveness of the brakes can also be tem­
porarily reduced if the car is driven for some dis­
tance without using the brakes when there is a
lot of salt on the road in winter. The layer of salt
that accumulates on the discs and pads can be
removed with a few cautious brake applications.
Corrosion
There may be a tendency for dirt to build up on
the brake pads and corrosion to form on the discs
if the car is used infrequently, or if you only drive
low mileages without using the brakes very
much.
If the brakes are not used frequently, or if corro­
sion has formed on the discs, it is advisable to
clean off the pads and discs by braking firmly a
few times from a moderately high speed ¢ A.
Faults in the brake system
If the brake pedal travel should ever increase
suddenly, this may mean that one of the two
brake circuits has failed. Drive immediately to the
nearest qualified workshop and have the fault
rectified. On the way to the dealer, be prepared
to use more pressure on the brake pedal and al­
low for longer stopping distances.
Low brake fluid level
Malfunctions can occur in the brake system if the
brake fluid level is too low. The brake fluid level
is monitored electronically.
llll-
115

Downloaded from www.Manualslib.com manuals search engine Intelligent
technology
Brake servo
The brake servo amplifies the pressure you apply
to the brake pedal.
A WARNING
- When applying the brakes to clean off de­
posits on the pads and discs, select a clear,
dry road. Be sure not to inconvenience or en­
danger other road users; do not risk an acci­
dent.
- Never let the car coast with the engine
switched off (this can cause accidents).
CD CAUTION
- Never let the brakes "drag" by leaving your
foot on the pedal
when
you do not really in­
tend to brake. This overheats the brakes, re­
sulting in longer stopping distances and
greater wear.
- Before driving down a long, steep gradient,
it is advisable to reduce speed and select a
lower gear. In this way you will make use of
the engine braking effect and relieve the
load on the brakes. If you still have to use
the brakes, it is better to brake firmly at in­
tervals than to apply the brakes continuous­
ly.
� Note
-If the brake servo is out of action, you must
apply considerably more pressure to the
brake pedal than you normally would.
- If you wish to equip the car with accessories
such as a front spoiler or wheel covers, it is
important that the flow of air to the front
wheels is not obstructed, otherwise the
brakes can overheat.
Electro-mechanical
power steering
Electro-mechanical power steering assists the
driver when steering.
The degree of power assistance is adapted elec­
tronically, depending on the speed.
116 Warning/indicator
lamps and driver
messages
• Steering: fault. Please stop vehicle
If the warning lamp Lights up permanently and
the message appears, there may be a power
steering failure.
Stop the vehicle in a safe place as soon as possi­
ble. Do NOT drive on. Obtain professional assis­
tance.
� Steering: fault. You can continue driving
If the indicator lamp lights up, the steering re­
sponse may be heavier or Lighter than usual. In
addition, it is possible that the steering wheel
will be off centre when driving in a straight Line.
Drive slowly to a qualified workshop and have the
fault rectified.
('!)) Note
You can drive on if the warning/indicator
lamp . or� Lights up only briefly.
Four-wheel drive
(quattro)
Applies to: vehicles with four-wheel drive
On quattro models the engine power is distrib­
uted to all four wheels.
General notes
On four-wheel drive vehicles, the engine power is
distributed to all four wheels. The distribution of
power is controlled automatically according to
your driving style and the road conditions. Also
refer to¢ page 113, Electronic stabilisation con­
trol (ESC).
The four-wheel drive is specially designed to
complement the superior engine power of your
Audi. This combination gives the car exceptional
handling and performance capabilities -both on
normal roads and in more difficult conditions,
such as snow and ice. Even so (or perhaps espe­
cially for this reason), it is important to observe
certain safety points¢&.
�

Downloaded from www.Manualslib.com manuals search engine Intelligent
technology
A WARNING
When extending or retracting the rear spoiler,
please make sure that no persons or objects
are close to the moving spoiler -risk of injury!
CD CAUTION
- If you need to push the vehicle, never put
your weight on the rear spoiler -Risk of
damage!
- To avoid damage to the rear spoiler, you
should not lean on it or apply any other type
of pressure.
- Do not operate the rear spoiler manually
when the boot lid is open or any moving
parts of the automatic rear spoiler are ob­
structed -risk of damage!
Note
Clean the rear spoiler housing every 2 to 3
months. The rear spoiler housing must be
free of ice, snow and leaves in order to oper­
ate correctly.
Power management
This system helps to ensure reliable
starting
The power management controls the distribu­
tion of electrical energy and thus helps to ensure
that there is always enough power available to
start the engine.
If a vehicle with a conventional electrical system
is left parked for a long time, the vehicle battery
will gradually lose its charge because certain
electrical equipment (such as the immobiliser)
continues to draw current even when the ignition
is off. In some cases there may not be enough
power available to start the engine.
Your vehicle is equipped with an intelligent pow­
er management system to control the distribu­
tion of electrical energy. This significantly im­
proves reliability when starting the engine, and
also prolongs the life of the vehicle battery.
The main functions incorporated in the power
management system are battery diagnosis, re-
118 sidual
current management and dynamic power
management.
Battery diagnosis
The battery diagnosis function constantly regis­
ters the condition of the vehicle battery. Sensors
detect the battery voltage, battery current and
battery temperature. This enables the system to
calculate the current power level and charge con­
dition of the vehicle battery.
Residu al current management
The residual current management reduces power
consumption while the vehicle is parked. It con­
trols the supply of power to the various electrical
components while the ignition is switched off.
The system takes the battery diagnosis data into
consideration.
Depending on the power level of the vehicle bat­
tery, the individual electrical components are
switched off one after the other to prevent the
vehicle battery from losing too much charge and
to ensure that the engine can be started reliably.
Dynamic power management
While the vehicle is moving, this function distrib­
utes the available power to the various electrical
components and systems according to their re­
quirements. It ensures that on-board systems do
not consume more electrical power than is being
generated, and thus maintains the maximum
possible vehicle battery power level.
.
1 Note
- The power management system is not able
to overcome the given physical limits.
Please remember that the power and life of
the vehicle battery are limited.
- If the indicator lamp ri'.J ¢ page 15 appears,
the starting ability may be impaired.
Points to remember
Starting ability has first priority.
Short trips, city traffic and low temperatures all
place a heavy load on the vehicle battery. In
these conditions a large amount of power is