2011 SKODA OCTAVIA fuel pump

Auxiliary heating (auxiliary heating and ventilation)
Description and important information The auxiliary heating (auxiliary heating and ventilation) heats or
supplies the interior of the vehicle with fresh air independent of the
engine.
Auxiliary heating (parking heating)
The auxiliary heater (parking heater) functions in connection with the air-condi-
tioning system or Climatronic.
It can be used when stationary, when engine is switched off for preheating of the
vehicle as well as while driving (e.g. during the heating phase of the engine).
The engine is also preheated when the vehicle is stationary and the engine is
switched off, if the auxiliary heating is switched on.
The auxiliary heating (parking heating) warms up the coolant during the combus-
tion of fuel from the vehicle tank. The coolant warms up the air, which (if the
blower speed is not set to zero) flows into the occupant compartment.
Auxiliary ventilation
The auxiliary ventilation enables fresh air to flow into the vehicle interior by
switching off the engine, whereby the interior temperature is effectively de-
creased (e.g. with the vehicle parked in the sun). WARNING
● The auxiliary heating must never be operated in closed rooms - risk of poi-
soning!
● The auxiliary heating must not be running during refueling - risk of fire.
● The exhaust pipe of the auxiliary heating is located on the underside of
the vehicle. Therefore do not place the vehicle, if you wish to operate the aux-
iliary heating, in such a way that the exhaust gases of the auxiliary heating
can come easily into contact with inflammable materials (e.g. dry grass) or
easily inflammable substances (e.g. fuel run out). Note
If the auxiliary heating runs, the fuel consumption comes from the vehicle tank.
The auxiliary heating automatically controls the filling level in the fuel tank. If only
a low quantity of fuel is present in the fuel tank, the function of the auxiliary heat-
ing is blocked.
● The exhaust pipe of the auxiliary heating, which is located on the underside of
the vehicle, must not be clogged and the exhaust flow must not be blocked.
● If the auxiliary heating and ventilation is running, the vehicle battery discharg-
es. If the auxiliary heating and ventilation has been operated several times over a
longer period, the vehicle must be driven a few kilometers in order to recharge the
vehicle battery.
● The auxiliary heating only switches the blower on, if it has achieved a coolant
temperature of approx. 50 °C.
● At low outside temperatures, this can result in a formation of water vapour in
the area of the engine compartment. This is quite normal and is not an operating
problem.
● After switching off the auxiliary heating, the coolant pump runs for a short pe-
riod.
● The auxiliary heating and ventilation does not switch on or comes on, if the
vehicle battery indicates a low loading state ⇒

 page 190, Automatic consumer
shut-off.
● The auxiliary heating (parking heating) does not switch on, if the following was
shown in the information display or before switching off the ignition: Please re-
fuel!
● The air inlet in front of the windscreen must be free of ice, snow or leaves in
order to ensure that the auxiliary heating operates properly.
● So that warm air can flow into the vehicle interior after switching on the auxili-
ary heating, you must maintain the comfort temperature normally selected by you
and leave the air outlet vents in an open position. It is recommended to put the air
flow in the position  or . 94
Heating and air conditioning system

CAUTION
● The starter may only be operated (ignition key position 3 ), if the engine is not
running. If the starter is immediately operated after switching off the engine, the
starter or the engine can be damaged.
● Avoid high engine revolutions, full throttle and high engine loads as long as
the engine has not yet reached its normal operating temperature - risk of damag-
ing the engine!
● Do not tow start the engine - danger of damaging the engine. On vehicles with
a catalytic converter, unburnt fuel may get into the catalytic converter where it
may ignite. This in turn may damage or destroy the catalytic converter. You can
use the battery of another vehicle as a jump-start aid ⇒ page 206
, Jump-starting.For the sake of the environment
Never warm up the engine when the vehicle is standing. Drive off right away.
Through this the engine reaches its operating temperature more rapidly and the
pollutant emissions are lower. 
Petrol engines These engines are fitted with a starter system which selects the correct fuel-air
mixture for every external air temperature.
●
Do not operate accelerator before and when starting engine.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right awayand wait for about 30 seconds before repeating the attempt.
● It is possible that the fuse on the electrical fuel pump is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 211.
● Contact the nearest specialist garage to obtain professional assistance.
It may be necessary, if the engine is very hot, to slightly depress the accelerator
after the engine has started. 
Diesel engines Glow plug system
Diesel engines are equipped with a glow plug system, the preglow period being
controlled automatically in line with the coolant temperature and outside temper-
ature.
The preglow indicator light  comes on after the ignition has been switched on. You should not switch on any major electrical components during the heating
period otherwise the vehicle battery will be drained unnecessarily.
● You should start the engine immediately after the glow plug warning light 
has gone out.
● The glow plug warning light will come on for about one second if the engine is
at a normal operating temperature or if the outside temperature is above +5 °C.
This means that you can start the engine right away.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right away and wait for about 30 seconds before repeating the attempt.
● It is possible that the fuse on the diesel preglow system is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 211.
● Contact the nearest specialist garage to obtain professional assistance.
Starting the engine after the fuel tank has run dry
It may take longer than normal to start the engine after refuelling if the fuel tank
has run completely dry - up to one minute. This is because the fuel system must
first of all be filled while the attempting to start the engine. 
Switching off the engine –
The engine can be switched off by turning the ignition key into position 1 ⇒ 
fig. 99 . WARNING
● Never switch off the engine before the vehicle is stationary - risk of acci-
dent!
● The brake booster only operates when the engine is running. Greater
physical effort for braking is required when engine is switched off. Because if
you do not stop as normal, this can cause an accident and severe injuries. CAUTION
you should not switch the engine off right away at the end of your journey after
the engine has been operated for a lengthy period at high loads but should be al-
lowed it to run at idling speed for about 2

minutes. This prevents any accumula-
tion of heat when the engine is switched off. £100
Starting-off and Driving

The filler flap is automatically unlocked or locked with the central locking.
Opening the fuel filler cap
–
Press in the middle of the left area of the fuel filler flap in direction of arrow 1⇒ fig. 147.
– Hold the fuel filler cap on the fuel filler tube with one hand and unlock it by
turning the vehicle key to the left (only valid for vehicles which do not have
automatic unlocking of the fuel filler flap).
– Unscrew the fuel filler cap anti-clockwise and place the fuel filler cap from
above on the fuel filler flap ⇒ fig. 147 - right.
Closing fuel filler cap
– Screw on the cap by turning it to the right until it is heard to lock.
– Hold the fuel filler cap on the fuel filler tube with one hand and lock it by turn-
ing the vehicle key to the right (only valid for vehicles which do not have auto-
matic locking of the fuel filler flap).
– Close the fuel filler flap until it locks.
The correct grade of fuel for your vehicle as well as the tyre size and inflation
pressures are stated on a sticker affixed to the inside of the fuel filler flap. Further
information on fuel ⇒
 page 176.
The fuel tank has a capacity of about 55 litres or 60 litres 1)
. WARNING
Pay attention to any legal requirements if you do carry a spare canister in the
vehicle. We do not recommend carrying any fuel canisters in your vehicle for
safety reasons. The canister can be damaged in the event of an accident and
fuel may leak out. CAUTION
● Before refuelling it is necessary to switch off the auxiliary heating system
(auxiliary heating and ventilation).
● Remove any fuel which has spilled onto the paintwork of your vehicle immedi-
ately - risk of paint damage! ●
On vehicles fitted with a catalytic converter, never let the fuel tank run com-
pletely empty. An irregular supply of fuel to the engine can result in misfiring and
unburnt fuel may get into the exhaust system, which may result in overheating
and damage to the catalytic converter.
● The fuel tank is full just as soon as the pump nozzle switches off for the first
time, provided the nozzle has been operated properly. Do not continue refuelling -
otherwise the expansion volume is filled up. 1)
Valid for Octavia Combi 4x4 and Octavia Scout. 179
Fuel Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data

Removing fuse cover
–
Move the circlips A ⇒ 
fig. 177 as far as the stop, the symbol  appears behind
the circlip and remove the cover.
Installing fuse cover
– Position the fuse cover on the fuse box and push the circlips A as far as the
stop - the symbol  is visible behind the circlip. CAUTION
● When unlocking and locking the fuse cover, it must be pressed on the sides to
the box, otherwise damage can occur to the locking mechanism.
● Carefully position the fuse cover in the engine compartment. If the cover was
not correctly positioned, water can get into the fuses and this results in a damage
to the vehicle! 
Fuse assignment in engine compartment Fig. 178 Schematic representation of
fuse carrier in engine compartment
Certain electrical components are only standard on certain vehicle model versions
or only available as optional equipment for certain models. No. Power consumer
F1 Not assigned
F2 Control unit for automatic gearbox DQ 200
F3 Measuring circuit
F4 Valves for ABS
F5 Control unit for automatic gearbox
F6 Instrument cluster, windshield wiper lever and turn signal light lever
F7 Power supply terminal 15, Starter No. Power consumer
F8 Radio
F9 Not assigned
F10 Engine control unit, Main relay
F11 Control unit for auxiliary heating
F12 Control unit for CAN databus
F13 Engine control unit
F14 Ignition
F15 Lambda probe
glow plug system relay
F16 Central control unit, right main headlight, right rear light unit
F17 Horn
F18 Amplifier for digital sound processor
F19 Front window wiper
F20 Water pump
valve for fuel dosing
F21 Lambda probe
F22 Clutch pedal switch, brake pedal switch
F23 Secondary air pump
Air mass meter
Fuel high pressure pump
F24 Activated charcoal filter, exhaust gas recirculation valve
F25 Pump for ABS
F26 Central control unit, left main headlight, left rear light unit
F27 Secondary air pump
Glow plug system
F28 Not assigned
F29 Power supply terminal 30
F30 Terminal X
a) a)
In order not to drain the battery unnecessarily when starting the engine, the electrical components
of this terminal are automatically switched off. 212
Fuses and light bulbs

Fuse assignment in the dash panel
Fig. 179 Schematic representation of
the fuse carrier in the dash panel
Certain electrical components are only standard on certain vehicle model versions
or only available as optional equipment for certain models. No. Power consumer
1 Diagnostic socket, Engine control unit, Electrical fuel pump
2 Control unit for ABS, ESP
3 Airbag
4 Heating, Air conditioning system, Reversing lights
5 Control unit for headlamp beam adjustment
6 Instrument cluster, control unit for automatic gearbox, control unit for
electromechanical power steering, parking aid, Haldex coupling 7 Not assigned
8 Not assigned
9 Not assigned
10 Not assigned
11 Not assigned
12 Central locking control unit
13 Diagnostic socket, Light switch
14 Control unit for automatic gearbox, Selector lever lock
15 Central control unit - interior lights
16 Climatronic
17 Not assigned
18 Rear window wiper
19 Control unit for trailer detection No. Power consumer
20 Not assigned
21 Cornering lights for the left and right side
22 Air blower for Climatronic
23 Front power window
24 Cigarette lighter
25 Rear window heater
Rear window heater, Auxiliary heating (auxiliary heating and ventila-
tion)
26 Power socket in the luggage compartment
27 Fuel pump relay, Injection valves (diesel engine)
28 Radio
29 Engine control unit, Crankcase ventilation heater
30 Control unit for automatic gearbox
31 Vacuum pump
32 Rear power window
33 Electric sliding/tilting roof
34 Control unit for convenience functions
35 Anti-theft alarm system
36 Headlight cleaning system
37 Front seat heating
38 Heated rear seats
39 Instrument cluster, windshield wiper lever and turn signal light lever
40 Air blower for heating and air conditioning
41 Not assigned
42 Not assigned
43 Towing device
44 Towing device
45 Towing device
46 Seat heaters
47 Relay for auxiliary heating
48 Phone
49 Light switch
£ 213
Fuses and light bulbs Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data