engine VOLKSWAGEN TRANSPORTER 2012 Manual PDF

Rear axle differential lock
OSG-0041
Fig. 229 On the dash panel: button for rear axle differential lock
i""('n First read and observe the introductory information and safety warnings & on page 282.
If the rear-axle differential lock is switched on, the vehicle has better traction on difficult ground and
Switching the rear axle differential lock on
and off
• To switch the rear axle differential lock on, press the 229 button on the dash panel at speeds under approximately 45 krnlh (28 mph) The indicator lamp r. lights up in the instru-ment cluster.
• Press button , Fig. 229 in dash panel again to switch off the rear-axle differential lock. The indica-tor lamp r. in the instrument cluster goes out.
If the engine is switched off with the rear axle dif-ferential lock switched on, the rear axle differential lock remains switched on for roughly another 30 seconds.
Not switching the rear axle differential lock on
• If you are driving on well-surfaced roads &.
• If the vehicle is being towed.
• If the brakes are being tested on a rolling road test bed.
286 I While dnving
Rear-axle differential lock cannot be switched on
The rear axle differential lock cannot be switched on in the following situations:
• if there is a large difference in the speed of ro-tation of the rear wheels
• if the drive train is loaded heavily
• If the mechanical teeth of the rear-axle differen-tial lock are '1ooth to tooth": the indicator light r. in the instrument cluster flashes.
A WARNING
Never switch the rear axle differential lock on If you are driving on a solid road surface, the vehicle is being towed or if the tyres have no traction.
• Your steering will be greatly Impaired when the rear axle differential lock has been switched on. This could mean that you lose control over the vehicle and cause serious In-juries.
CD
Switching the rear axle differential lock on while being towed can damage the drive train.
m If the rear axle differential lock is switched off W when driving through a bend, this may cause a small shudder to go through the vehicle. This is caused by the release of wind-up in the drive train. This is normal and is not a indication of damage to the vehicle.
m If you drive through bends with the rear axle W differential lock switched on, the wheels "rub" on the road surface. You might be able to hear this. The ''rubbing" of the tyres -especially on solid ground -will lead to increased wear on the tyres.

Fig. 238 On the instrument cluster display: adap-tive cruise control (ACC) deactivated temporarily; vehicle detected ahead, time interval set
Fig. 239 On the instrument cluster display: adap-tive cruise control (ACC) active: vehicle detected ahead. time interval is being set
ro First read and observe the Introductory Information and safety warnings & on page 298.
Displays
Display fields =>Fig. 238 or =>Fig. 239:
G) Vehicle ahead when adaptive cruise control (ACC) is not active.
® Selected distance range when adaptive cruise control (ACC) is not active.
@ Vehicle detected ahead. Adaptive cruise control (ACC) active.
@ Setting the time interval to the vehicle in front while travelling at stored speed.
® Time interval to the vehicle in front while travelling at stored speed has been set.
Warning and indicator lamps
Lit up Possible cause=>& Solution
The speed reduction of the adaptive Brakel Depress the brake pedal. The system cruise control (ACC) to the vehicle ahead is insufficient. tells the driver to take control.
fu! Adaptive cruise control (ACC) not availa-Switch off the engine and restart it while sta-ble.a) tionary. Inspect the radar sensor (for dirt, ice
Adaptive cruise control (ACC) currently etc.). Go to a qualified workshop immediately
"0! and have the system checked if it is constant-not available•) ly unavailable.
Adaptive cruise control (ACC) active. No .. (") vehicle has been detected ahead. The set -speed is kept constant.
1!\/hen displayed in white: Adaptive cruise control (ACC) active. Vehicle detected ahead. The adaptive cruise control (ACC)
fu
regulates the speed and the distance from the vehicle ahead. -
1!\/hen displayed in grey: Adaptive cruise control (ACC) not active. System switched on, does not regulate.
•> Displayed in colour on an instrument cluster with colour display.
300 I Whlio drivmg

Air conditioning system
Heating, ventilating, cooling
o:n Introduction
This chapter contains information on the following subjects:
Controls for Climatic . . . . . . . . . . . . . . . . . . . . 323
Controls for Climatronic . . . . . . . . . . . . . . . . . 325
Controls for the heating and fresh air system . 327
Information on the air conditioning system . . . 328
..................... m
Air recirculation mode . . . . . . . • . . . . . . . . . . . . 330
Windscreen heating . . . . . . . . . . . . . . . . . . . . . 331
Roof ventilator . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Displays for the Climatronic information
Depending on the vehicle equipment level, infor-mation on the Climatronic is displayed briefly on the screen of the factory-fitted radio or navigation system.
The dust and pollen filter
The dust and pollen filter with activated charcoal reduces the level of impurities in the outside air en-tering the vehicle.
The dust and pollen filler must be changed regular-ly to avoid impairing the performance of the air conditioning system.
The dust and pollen filter must be changed more frequently than stated in the service schedule if the efficiency of the filter declines prematurely due to the vehicle being used in areas with high levels of air pollution.
Additional information and warnings:
• Exterior views 5
• Wipers/washer 116
• Supplementary heaters (auxiliary air heater or auxiliary coolant heater) 332
• Cleaning and caring for the vehicle exterior 380
A WARNING
Poor visibility through all windows increases the risk of collisions and accidents, which can cause serious injuries.
• Always ensure that all windows are free of ice, snow and mist to ensure good visibility.
3221 While driving
A WARNING (Continued)
• Maximum heat output, which Is needed to defrost the windows as quickly as possible, is only available when the engine has reached Its operating temperature. Do not start your journey until you have good visibil-Ity.
• Always ensure that the heating and fresh air system or the air conditioning system and the rear window heating are used correctly so that you have good visibility.
• Never use the air reclrculatlon mode for an extended period. If the cooling system Is switched off, the windows can mist up very quickly In air reclrculatlon mode and reduce visibility considerably.
• Always switch off the air reclrculatlon mode when it Is not required.
A WARNING
Stale air can quickly make the driver tired and affect their concentration, which In turn can cause collisions, accidents and serious Inju-ries.
• Never switch off the blowers or switch on the air recirculatlon mode for an extended pe· riod as this prevents fresh air from entering the vehicle interior.
• Switch off the air conditioning system if you suspect that it has been damaged. This can help to prevent secondary damage. The air conditioning system should be checked by a qualified workshop.
• Repairs to the air conditioning system re-quire specialist knowledge and special tools. Volkswagen Commercial Vehicles recommends using a Volkswagen Commercial Vehicles deal-ership for this purpose.
• Do not insert any objects in the slots of the air outlets. This could cause damage to the air outlets.

m If the cooling system is switched off. the out-W side air that is drawn into the vehicle is not dehumidified. To prevent the windows misting over, Volkswagen Commercial Vehicles recommends that you leave the air conditioning (air conditioning co'!!E.'"essor) switched on. To do this, press the @ button. The indicator lamp in the button must light up.
m Maximum heat output, which is needed to de-W frost the windows as quickly as possible, is only available when the engine has reached its op-erating temperature.
Controls for Climatic
Fig. 254 In the centre console: Climatic controls
m Keep the air intake slots in front of the wind-W screen free of snow, ice and leaves to ensure heating and cooling is not impaired, and to prevent the windows from misting over. !en-o191
Fig. 255 In headliner of the passenger Climatic controls for the passenger compartment. In the centre console [ID: controls of the heating and fresh air system for the passenger compartment.
ill1 First read and observe the Introductory l..-Wl information and safety warnings & on page 322.
Press the corresponding button to switch a func-tion on or off. Press the button again to switch the function off.
Illuminated LE Os in the controls indicate whether a particular function is active. .,.
Air conditioning system I 323

Button, Additional information. Climatic '*Fig. 254 and '*Fig. 255. control
CD Temperature .
••••• Turn the regulator to set the temperature as required.
@ Blower. Setting 0: blower and Climatic are switched off. Setting 4: maximum blower setting.
Air distribution. @ Front infinitely adjustable. Passenger compartment: Can be adjusted manually with the buttons.
® Air distribution to the windscreen. In this position, the air re circulation mode is switched off
automatically, or not switched on at ail .
.. 0 ;;;o Air distribution to the upper body via the air vents In the dash panel.
Air distribution to the footwell.
@o •;;JJ Air distribution to the windscreen and the footweii.
gp Passenger compartment: air distribution to the side windows.
AC Press the button to switch the cooling system on or off.
QW Rear window heating: only functions when the engine is running and switches off automati-
cally after approximately 10 minutes.
Only for vehicles with controls in the roof of the passenger compartment: enabling or REAR disabling controls in the passenger compartment. An indicator lamp in the button lights up
when a control is enabled.
Air recirculation mode =-page 330.
Switch off. I Turn the blower switch to setting 0.
A WARNING
Stale air can quickly make the driver tired and affect their concentration, which in turn can cause collisions, accidents and serious Inju-ries.
324 I While drivmg
A WARNING (ConUnued)
• Never switch off the blowers or switch on the air recirculation mode for an extended pe-riod as this prevents fresh air from entering the vehicle interior.

Button, Additional information. Climatronlc 256 and 257. control
.. 0 Air distribution on the upper body via the air vents in the dash panel or in the headliner in ;;;o the passenger compartment.
!J Air distribution to the footwetl.
tTIJ Passenger compartment: air distribution to the side windows.
dlrlb compartment: defogging the side windows. Press button RWI and then button to activate the function from the front.
Automatic air recirculation mode 330.
w Windscreen heating: only functions when the engine is running and switches off automati-cally after approximately 10 minutes.
qw Rear window heating: only functions when the engine is running and switches off automati-cally after approximately 10 minutes.
Automatic temperature, blower and air distribution control. Press the button: the AUTO High function (high blower output) is switched on. The right-AUTO hand indicator lamp in the button lights up. Press the button again: the AUTO Low function (low blower output) is switched on. The left-hand indicator lamp in the button lights up.
A/C Press the button to switch the cooling system on or off.
Press the button to achieve maximum cooling. The air recirculation mode and cooling sys-tern are switched on automatically, and air distribution is automatically set to position ;D.
Switch off. Press the OFF button@ or manually set the blower to 0. An indicator lamp in the@) button lights up when the system is switched off.
Press the button to readjust the air conditioning settings for the rear seats. The displays REAR then show the settings for the rear seats. Press the button again or do not press any button for approximately 10 seconds in order to switch the function off.
Use residual heat. If the ignition is switched off and the engine is warm, the residual heat
REST from the engine is used to continue to heat the vehicle interior. The function switches off at-ter 30 minutes or when capacity is low. Press button@!] and then button RWI to use the residual warmth in the passenger compartment.
the driver-side temperature settings to all seats: if the indicator lamp in the button is lit up, the driver-side temperature settings also apply to the other seats. Press SYNC the button or activate the temperature regulator for the passenger side or the rear seats to set different temperatures for the passenger side and the rear seats. The indicator lamp in the button is not lit up.
A wARNING A WARNING (Continued)
Stale air can quickly make the driver tired and affect their concentration, which in turn can cause collisions, accidents and serious inju-ries.
326 I While driving
• Never switch off the blowers or switch on the air recirculatlon mode for an extended pe-riod as this prevents fresh air from entering the vehicle interior.

Settings for optimal road visibility
• Switch off air recirculation mode 330.
• Set blower® to level 1 or 2.
• Set the temperature selector G) to the required position.
• Open and position all vents on the dash panel.
• Turn the air distribution Fig. 258 0 to the desired position.
Rear window heating
A button for the rear window heating @ may be contained in the dash panel.
• When the engine is running, press the @ but-ton to switch on the rear window heating.
• The rear window heating is switched off auto-matically after approx. 10 minutes. To switch it off before the automatic switch-off, press the(!) but-ton again.
A WARNING
Stale air can quickly make the driver tired and affect their concentration, which in turn can cause collisions, accidents and serious inju-ries.
• Never switch off the blowers or switch on the air recirculatlon mode for an extended pe-riod as this prevents fresh air from entering the vehicle Interior. Information on the air conditioning system
.........r'n First read and observe the Introductory L-.lr:.ll Information and safety warnings & on page 322.
The cooling system for the vehicle interior only works when the engine is running and the blower is switched on.
The air conditioning system operates most effec-tively with the windows and the sliding/tilting roof closed. However, if the vehicle has heated up after standing in the sun for some time, the air inside can be cooled more quickly by opening the win-dows and the sliding/tilting roof for a short time.
Settings for optimal road visibility
Switching the cooling system on not only reduces the temperature of the vehicle interior, but also the humidity. This improves comfort for the vehicle oc-cupants and prevents the windows from misting when the outside humidity is high.
Climatic
• Switch off air recirculation mode 330.
• Set the blowers to the required level.
• Set the temperature to +22•c (+72.F).
• Open and position all vents on the dash panel 329.
• Turn the air distribution controller to the desired position.
• Press the@) button to switch the cooling sys-tem on. The indicator lamp in the button lights up.
328 I While driving
Cllmatronlc
• Press button.
• Set the temperature to +22•c (+72.F).
• Open and position all vents on the dash panel 329.
The cooling system cannot be switched on
The following criteria may prevent the cooling sys-tem from being switched on:
• The engine is not running.
• The blower is switched off.
• The air conditioning system fuse has blown.
• The ambient temperature is lower than approxi-mately +3"C (+38°F).
• The compressor has been temporarily switched off because the coolant temperature is too high.
• There is a different fault in the vehicle. The air conditioning system should be checked by a quali-fied workshop.
Things to note
If the humidity and temperature outside the vehicle are high, condensation can drip off the evaporator in the cooling system and form a pool underneath the vehicle. This is normal and does not indicate a

m The windscreen may mist up after starting W the engine due to residual humidity in the air conditioning system. Switch the defrost function on in order to clear the windscreen of condensation or mist as quickly as possible. Vents
A
Fig. 260 Types of vents in the headliner
Fig. 261 Vent for the passenger compartment
1"'1'11 First read and observe the Introductory L-lo:.U information and safety warnings & on page 322.
Vents in the headliner
To ensure that the vehicle interior is sufficiently heated, ventilated and cooled, you should never fully close the vents.
• To open, press the panel with a ridge G).
• OR: turn thumb wheel@ to position 0.
IB
• To close, press the panel that is opposite the panel with the ridge @.
• OR: turn thumb wheel @to position e.
Indirect ventilation
Turn thumb wheel to position :-:.
There is no indirect ventilation in some countries. The vent is closed in position :-:.
CD
Do not place any food, medicine or any other temperature-sensitive items In front of the vents. Heat-sensitive food, medicine and other items could be either damaged or rendered useless.
m The air that comes out of the vents and flows W through the entire passenger compartment escapes from the vehicle through the ventilation openings in the side panels on the left and right. The ventilation slots must not be covered by items of clothing or other objects. Air conditioning system I 329

Windscreen heating
1111 First read and observe the introductory L.-J,::.U information and safety warnings & on page 322.
Windscreen heating helps to de-ice the
windscreen and only works when the en-
gine is running.
Switching on and off
Press the button ®in the centre console or the Climatronic to switch the windscreen heating on and off.
Roof ventilator
BS0-000<
Fig. 262 On the dash panel: buttons for the roof ventilator
1111 First read and observe the introductory L.-J,::.U Information and safety warnings & on page 322.
Air extraction
• To switch on, switch the ventilation off, if on.
• Press the 0 262 button.
• To switch off, press button again.
Ventilation
• To switch on, switch the air extraction off. if on.
• Press the 0 button.
• To switch off, press button again.
The windscreen heating is switched off automati-cally depending on the outside temperature or after 10 minutes at the latest.
Switch-off conditions
The windscreen heating will switch off automatical-ly when one of the following conditions applies:
• After the engine is switched off.
• If the vehicle's connected load is too high as a result of too much electrical equipment being used at the same lime.
• Malfunctions in the air conditioning system.
• After the time specified has elapsed. Fig. 263 In the headliner: roof ventilator
Q)
At least one vent must be open if the air extrac-tion or ventilation Is switched on. The blower could otherwise be damaged.
ffi Using electrical appliances with the engine L!J off, ignition switched on or off and the roof ventilator switched on will drain the battery. Air conditioning system 331

Supplementary heaters (auxiliary air heater or auxiliary
coolant heater)
[Q] Introduction
This chapter contains information on the following subjects:
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Switching the supplementary heating system on and off . . . . . . . . . . . . . . . . . . . . . . . . 334
Remote control . . . . . . . . . . . . . . . . . 335
Programming the supplementary heating system . . . . . . . . . . . . . . . . . . . . . . 338 Switching the child proof lock on and off . . . . . 339
Operation . . . . . . . . . . . . . . . . . . . . . . . . 339
The supplementary heating system is supplied with fuel from the vehicle fuel tank and can be used when the vehicle is in motion or stationary. Electri-cal power is supplied by the vehicle battery.
The auxiliary air heater runs in air recirculation mode and heats the vehicle interior. it has sepa-rate vents in the passenger compartment =>Fig. 265.
The auxiliary coolant heater heats the heating circuit. Heat is guided into the vehicle interior via the vents for the heating or air conditioning system. With the auxiliary coolant heater, it is possible to switch between heating and ventilating.
Additional information and warnings:
• Supplementary heater in the California =>page 192
• Filling the tank =>page 340
• Battery =>page 362
Swallowing batteries with a diameter of 20 mm or other lithium batteries can result in severe or even fatal injuries within a very short period of time.
• Always keep the vehicle key, key ring with batteries, spare batteries, round cells and other batteries that are larger than 20 mm out of the reach of children.
332 I While driving
• Call for medical help immediately you pect that someone has swallowed a batte
A WARNING
The fumes from the supplementary heating system contain carbon monoxide, which is an odourless and colourless poisonous gas. Carbon monoxide can cause people to lose consciousness. lt can also cause death.
• Never start or run the supplementary heat-ing system In unventllated or closed rooms.
• Never program the supplementary heating system so that Is switched on and run In un-ventilated or enclosed areas.
A WARNING
Parts of the exhaust system of the supple-mentary heating system become very hot. This can cause fires.
• Park the vehicle so that no part of the ex-haust system can come Into contact with any Inflammable material underneath the vehicle, e.g. dry grass.
Q)
Do not place any food, medicine or any other temperature-sensitive items in front of the vents. Heat-sensitive food, medicine and other items could be either damaged or rendered useless.
m After starting the engine with a discharged W vehicle battery, or after the battery has been changed, system settings (time, date, personal convenience settings and programming) may have been changed or deleted. Check and correct the settings as necessary once the vehicle battery has been sufficiently charged.