SSP 307 VW Touran Electrical System SSP 307

Service.

Self-study programme 307

The Touran Electrical system Design and function

The networking technology, used until now only in luxury class vehicles, will be a feature in compact vans, such as the Volkswagen Touran.

This self-study programme is designed to help you better understand the networking concept of the Volkswagen Touran.

The control units installed in this system also manage tasks that were previously carried out by relays and switches. In order that these tasks can be fulfilled efficiently, the units have to exchange a great deal of information (data) between each other. Such a high rate of data transfer would only be possible with a large number of cables if standard means were used, such as wiring connections. To keep the number of wiring connections at a manageable level, Volkswagen favours the use of data bus connections on a wider scale.

It covers the allocation of control units to the various data bus systems, the fitting locations of relay slots, fuses and control units. Furthermore, it describes the various functions of and changes to the diagnosis system.

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NEW

2

This self-study programme explains the design

For the latest testing, setting and repair

and function of new developments.

instructions, please refer to the relevant

The contents will not be updated.

workshop literature.

Important Note

Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

LIN data bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Onboard power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Data bus diagnosis interface . . . . . . . . . . . . . . . . . . . . . . 24

Onboard power supply control unit . . . . . . . . . . . . . . . . . 28

Windscreen wiper system. . . . . . . . . . . . . . . . . . . . . . . . . . 38

Rear window wiper system . . . . . . . . . . . . . . . . . . . . . . . . 44

Dash panel insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Immobiliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Convenience and infotainment settings . . . . . . . . . . . . . . 54

Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Test yourself . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

3

Introduction Fuse boxes and relay slots in vehicle's electrical system Fitting locations The onboard power supply of the Touran is decentralised. For this reason, the fuse boxes and relay slots are installed at various locations in the vehicle. The adjacent diagram shows the various fitting locations.

Electrics box on left in engine compartment

Back-up fuse box on left in engine compartment

4

Relay carrier on left under dash panel

Relay carrier on onboard power supply control unit on left under dash panel

Fuse box on left under dash panel S307_001

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Introduction The networking concept Overview of networked control units In order that data can be transferred between the control units, these are networked via various data bus systems.

T16

J220

The data bus diagnosis interface J533 (gateway) provides the interface for the data buses: J431

-

Drive train CAN data bus Convenience CAN data bus Infotainment CAN data bus Dash panel insert CAN data bus Diagnosis CAN data bus

J285 J533

Drive train CAN data bus

CAN data bus line

Convenience CAN data bus

Communications line

Infotainment CAN data bus

LIN data bus line

J503 R J345

J412

LIN data bus J519 CAN data bus Sensor

J525

Dash panel insert CAN data bus

J255

Diagnosis CAN data bus

J162 S307_049

In addition to the CAN data bus, a number of electric components are networked via the LIN data bus.

The data protocols have been changed. Therefore, these control units cannot be exchanged with those of other vehicle models e.g. Touareg or Phaeton.

6

R78

J136

J604

J388

G419

J217

J104

J587

J500

J234

G85

E221

J527

J446

J400

G273

J345 J386 J387 J388 J389 J393 J400 J412 J431 J446 J500 J503 J519 J525 J527 J533 J584

J584

J386

J387

J393

J389

H8

Key E221 G85 G273 G384 G419 H8 J104 J136 J162 J217 J220 J234 J255 J285

J587 J604 R R78 T16

Operating unit in steering wheel Steering angle sender Interior monitoring sensor Vehicle inclination sensor ESP sensor unit Anti-theft alarm signal horn ABS with EDL control unit Seat adjustment control unit Heating control unit Autom. gearbox control unit Motronic control unit Airbag control unit Climatronic control unit Control unit with display in dash panel insert Trailer detector control unit Door control unit, driver side Door control unit, front passenger side Door control unit, rear left Door control unit, rear right Convenience system central control unit Wiper motor control unit Cellphone electronics control unit Headlight range control, control unit Parking aid control unit Power steering control unit Control unit with display for radio and navigation Onboard power supply control unit Digital sound package control unit Steering column electronics control unit data bus diagnosis interface Wiper motor control unit front passenger side Selector lever sensors control unit Auxiliary air heater control unit Radio TV tuner Diagnosis connection

G384

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Introduction Control units in drive train CAN data bus Control units and fitting locations The adjacent diagram shows the control units that belong to the drive train CAN data bus and associated fitting locations. The data is transferred at a speed of 500 kbit/s. Transfer is made via the orange/black CAN high line and orange/brown CAN low line. To make data transfer more efficient, the CAN lines are entwined.

Airbag control unit J234 under centre console

ABS with EDL control unit J104 under bulkhead in engine compartment

Motronic control unit J220 under plenum chamber cover

8

Control unit for headlight range control J431 on left under dash panel, on tunnel support

data bus diagnosis interface J533 under dash panel, above relay carrier

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Automatic gearbox control unit J217 in wheel housing

9

Introduction The control units in the drive train CAN data bus Control units and fitting locations Shown in the diagram are the control units of the convenience CAN data bus and their fitting locations. The speed of data transfer is 100 kbit/s. The data is transferred via the orange/green CAN high line and orange/brown CAN low line. Both CAN lines are entwined together.

Steering column electronics control unit J527 on steering column switch

Convenience system central control unit J393 on right under dash panel, near centre console

Climatronic control unit J255 in centre console

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Parking aid control unit J446 in rear right side part

Trailer detector control unit J345 in rear right side part

Onboard power supply control unit J519 under dash panel, on relay carrier

Door control units J386, J387, J388, J389 in doors

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data bus diagnosis interface J533 under dash panel, above relay carrier

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Introduction The control units in the infotainment CAN data bus Control units and fitting locations The control units of the CAN data bus and fitting locations are shown in the adjacent diagram. The infotainment CAN data bus transfers data at a rate of 100 kbit/s. The CAN high line is orange/purple and the CAN low line is orange/brown. Both CAN lines are entwined together.

Cellphone operating electronics control unit J412 on front right in footwell

Heater control unit J162 on front right under wing

12

Control unit with display for radio and navigation J503 or Radio R in centre console

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Introduction The control units in the dash panel insert CAN data bus and in the diagnosis CAN data bus

The dash panel insert CAN data bus and the diagnosis CAN data bus are new data bus connections in the Volkswagen Touran.

Dash panel insert CAN data bus The data bus transfers data from the dash panel insert to the data bus diagnosis interface. The control unit with display unit in the dash panel insert and the data bus diagnosis interface are the only control units attached to this data bus.

Diagnosis CAN data bus Data transfer between the diagnosis connection T16 and the data bus diagnosis interface is via the diagnosis CAN data bus.

Rate of data transfer The rate at which data is transferred is 500 kbit/s for both CAN data buses.

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Control unit with display unit in dash panel J285

data bus diagnosis interface J533 under dash panel, above relay carrier

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T16 Diagnosis connection on left in footwell

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LIN data bus The LIN data bus as sub data bus system General description A sub data bus system connects control units with their electrical components. Among these components are, for example, control units, switches, sensors, actuators etc. This type of connection and data transfer is used in the Volkswagen Touran for a number of systems. As a sub data bus system, the LIN data bus has an advantage in cost. The designation LIN stands for local interconnect network, and it means that all the associated electrical components are within a set and limited area of the vehicle.

It is possible for a number of LIN data bus systems to be installed in a vehicle. They will each have different functions to perform. A LIN data bus system consists of a master control unit and one or more slave control units. The master control unit is also networked with other control units (apart from slave control units) in the vehicle via the CAN data bus. This permits the transfer of data to other LIN data bus systems and other CAN data bus control units.

LIN data bus system data bus diagnosis interface J533

CAN bus

LIN data bus

Anti-theft alarm system horn H8 LIN slave

Interior monitoring sensor G273 LIN slave

Convenience system central control unit J393 CAN user and LIN master

Vehicle inclination sender G384 LIN slave

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Data transfer The data is transferred at a speed of 1 kbit/s to 20 kbit/s. The rate of data transfer is therefore a maximum of 20% of the rate for convenience or infotainment CAN data buses and is fixed in the software of the LIN master. This transfer is made via data leads that are violet in basic colour with a white identification mark. The cross section of the wire is 0.35 mm2. The LIN data bus is a single wire bus. The data lead is not screened. S307_008

Recessive level

Signal level The signal level of the LIN data buses is either close to battery voltage (UB) (recessive level) or earth (0 Volt) (dominant level).

U UB

0

Dominant level

t S307_009

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LIN data bus Master control unit The control unit connected via the CAN data bus system performs the master functions in the LIN data bus system.

The transfer of data between master and slave is always initialised by the master. A slave is not capable of communicating independently.

Among these master functions are: - Data conversion of LIN data bus messages to the data format used by the CAN data buses, if and when these messages are required. - The control of data transfer in the LIN data bus and monitoring of the data transfer rate. - The transfer of diagnosis data to the LIN slave control unit.

Master control unit

Steering column electronics control unit J527 Users of convenience CAN data bus and master control unit in the LIN data bus

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Slave control unit The slave function could be taken on by control units such as the multi-function steering wheel, actuators such as the anti-theft alarm horn or sensors such as the vehicle altitude sensor. The electronics integrated in the slave control unit evaluate the driver's input via the operating unit buttons in the steering wheel, they convert the input into digital information e.g. "radio louder" and send it when required to the master control unit via the LIN data bus. The sensors also have electronics that transfer the measured values digitally to the master control unit.

Slave control unit

Steering wheel operating unit E221 Slave control unit in LIN data bus

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Onboard power supply The electrics box Fitting location The electrics box can be found on the left in the engine compartment. Description All fuses and relays that safeguard or control components in the engine compartment, are housed in the electrics box (E box). A wiring guide to the interior and back is therefore no longer necessary. Fault finding is simplified, safeguarding is adapted more effectively to the consumers and multiple assignment of fuses is largely avoided.

Electrics box

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Electrics box In addition to the fuses for components in the engine compartment, the electrics box has the following relays: ● ● ● ● ●

Power supply relay terminal 15 J329 Power supply relay terminal 50 J682 Glow plug relay J52 Motronic power supply relay J271 Power supply relay J317

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Back-up fuse box The back-up fuse box houses fuses for the following: ● ● ● ●

alternator, electro-mechanical power steering, radiator fan, auxiliary heater.

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Onboard power supply The relay carrier and the fuse box in the interior Fitting location In the interior, on the left under the dash panel, you can find the relay carrier, the relay carrier on the onboard power supply control unit and the fuse box.

Relay carrier and fuse box in interior

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Relay carrier The relay carrier accommodates additional relays and fuses from optional extras in the vehicle.

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Relay carrier on onboard power supply control unit The following relays can be found on the onboard power supply control unit relay carrier. S307_055 ● ● ● ● ● ●

Power supply relay terminal 30G Heated rear window relay J9 Horn relay J413 Double washer pump relay 1 (front) J729 Double washer pump relay 2 (rear) J730 X contact relief relay J59

Fuse box Included in the fuse box are the fuses for the electrical components in the vehicle. S307_056

For the latest terminal assignment details about the fuse box, please refer to ELSA.

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Data bus diagnosis interface The data bus diagnosis interface J533 Description Due to the high level of network functions, a great deal of data is transferred. To assure the effective exchange of data, several data bus systems are necessary that transfer data between each other. The data bus diagnosis interface connects these data buses together as a gateway interface and makes data transfer possible. This function that was perviously integrated in the dash panel insert or onboard power supply control unit, is now an independent control unit.

Data transfer data bus diagnosis interface

Dash panel insert CAN data bus

Diagnosis CAN data bus Diagnosis connection

Drive train CAN data bus

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Convenience CAN data bus

Fitting location The data bus diagnosis interface can be found on the left next to the dash panel above the fuse box.

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Dash panel insert

Infotainment CAN bus

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data bus diagnosis interface Master functions The data bus diagnosis interface J533 manages the master functions for terminal 15 run-on on the drive train CAN data bus and control of the sleep and wake-up modes for the data bus systems.

Terminal 15 run-on Certain control units in the CAN data bus need to exchange information even when terminal 15 is off. For this reason, a message is sent to the CAN data bus for actuation of the run-on mode. The control units make a connection from terminal 30 to terminal 15 internally, which allows them to communicate further. In this way, the power steering control unit J500, for example, can communicate with the other control units.

The run-on mode can last between ten seconds and fifteen minutes. The run-on period depends on the data that is to be sent. To finish the run-on period, the data bus diagnosis interface initiates the sleep command.

Control units that participate in terminal 15 run-on J533 Drive train CAN data bus

Term. 30

J271

J500 J220

G85

J587 Internally switched terminal 15 J217

J104 S307_047

Key G85 J104 J217 J220 J271

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Steering angle sender ABS with EDL control unit Automatic gearbox control unit Motronic control unit Motronic power supply relay

J500 Power steering control unit J587 Selector lever sensors control unit J533 data bus diagnosis interface

Sleep and wake-up modes of the data bus systems When all of the control units of the convenience and infotainment CAN data bus have announced their readiness for stand-by, a control unit will give the signal to 'sleep'. The voltage level of the low signal is 12 V and 0 V for the high signal. Furthermore, it also gives the wake-up signal when the data bus has to be activated, for example, when the doors are unlocked.

The data bus diagnosis interface monitors the sleep function. If the drive train CAN data bus does not go into sleep mode, the convenience and infotainment CAN data buses do not go into sleep mode either. If the convenience CAN data bus does not go into sleep mode, the infotainment CAN data bus does not go into sleep mode either.

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Sleep mode

Wake-up signal

Wake-up mode

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Onboard power supply control unit The onboard power supply control unit J519 Fitting location The onboard power supply control unit can be found underneath the dash panel where it forms a unit with the relay carrier.

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Variants The onboard power supply control unit is available on the Midline and Highline variants. The Highline variant is installed in vehicles with fog lamps and/or Xenon lights. All other vehicles are installed with the Midline variant. Retrofitting of fog lamps is only possible when the onboard power supply control unit of the Midline variant is exchanged with the onboard power supply control unit of the Highline variant.

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Onboard power supply control unit

The following figures are approximate and may differ depending on country variations and software.

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Relay carrier on onboard power supply control unit

Tasks: The onboard power supply control unit actuates and controls the following functions: - Electric load management - Functional readiness The onboard power supply control unit activates the function of the electric sliding/tilting sunroof. - Exterior light control - Turn signal control - Windscreen wipers Conveyance of data bus signals to wiper motor control unit - Rear window wiper - Heated rear window Actuation of the heated rear window is via the onboard power supply control unit when the heated rear window button is pressed and if the alternator provides enough voltage. - Interior light control Terminal 30G, via which voltage is supplied to the interior lights, is activated by the onboard power supply control unit.

- Terminal actuation The onboard power supply control unit controls terminal 75x via an X contact relief relay. Terminal 15 is actuated via the voltage supply relay for term. 15 in the electrics box and on the onboard power supply control unit relay carrier. Terminal 50 is actuated via the power supply relay for terminal 50 in the electrics box. - Dimmer, instrument backlight Term. 58d has a dimming function and supplies the dimmer switches and instruments with voltage. - Fuel pump readiness When the driver's door is opened, the electrical fuel pump is supplied with power by the onboard power supply control unit. As soon as the engine has started, power is supplied by the engine control unit. - Alternator readiness The alternator is made ready by the onboard power supply control unit.

- Backlight The backlight for the footwell is actuated by the onboard power supply control unit via a pulse width modulated signal depending on the position of the dimmer switch for switches and instruments.

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Onboard power supply control unit Electrical load management

Operating mode 1

The electrical load management assures that there is always enough energy in the battery to turn the engine over.

Terminal 15 on and alternator active

To enable this, the electrical consumers of the convenience system are deactivated. The standard of technical safety remains.

Measures:

To switch off the consumers, the onboard power supply control unit evaluates the engine speed, the battery voltage and the alternator load via the DF signal (dynamo field). From this information and from information about which consumers are switched on with short activation periods, the onboard power supply control unit carries out an evaluation of the onboard power supply load state. Based on this evaluation, the onboard power supply control unit can increase engine speed via the engine control unit. The deactivation of convenience consumers is still possible in the same way. For load management, three different operating modes are recognised.

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At a battery voltage below 12.7 Volt, the onboard power supply control unit demands an increase in the engine idling speed. At a battery voltage below 12.2 Volt, the following consumers are switched off: -

Heated seats Heated windscreen Heated exterior mirrors Steering wheel heating Footwell lighting Inner door handle lights Reduction and deactivation of Climatronic Warning and deactivation of infotainment

Operating mode 2

Operating mode 3

Terminal 15 on and alternator inactive

Terminal 15 off and alternator inactive

Measures:

Measures:

At a battery voltage below 12.2 Volt, the following consumers are switched off:

At a battery voltage below 11.8 Volt, the following consumers are switched off:

-

-

Reduction and deactivation of air conditioning Footwell lighting Inner door handle lights Entry/exit lights Leaving home Warning and deactivation of infotainment

Interior lights Footwell lighting Inner door handle lights Entry/exit lights Leaving home Infotainment, e.g. radio

The differences in deactivation in the various operating modes is in the order of individual consumer deactivation. Furthermore, in operating mode 3, several consumers can be deactivation at once. Deactivation is cancelled when the conditions for deactivation are no longer met.

When deactivation takes place, this will be shown in the dash panel insert. In addition, an entry will be made in the onboard power supply control unit fault memory.

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Onboard power supply control unit Exterior light control The onboard power supply control unit evaluates the signals directly from the light switch. Information about actuation of the turn signals, main beam and headlight flashing is sent via the steering column electronics control unit J527 to the convenience CAN data bus.

Functional diagram F

F4 J519 X M25 D

Term. 15

E4

E19 J527 Convenience CAN data bus S307_019

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Key D E1

Ignition/starter switch terminal 15 Light switch

E4

Manual dipped beam and flash switch

E19

Parking light switch

F F4 J519 J527 M25 X

Brake light switch Reverse light switch Onboard power supply control unit Steering column electronics control unit High level brake light bulb Number plate light

Turn signal control If the turn signal switch E2 is pressed once briefly, vehicle direction is indicated by three flashes of the lights. If the switch is pressed again briefly, the three flash sequences are repeated. This is referred to as the lane change function.

Pictorial representation First actuation

Second actuation

Operation of turn signal by quick actuation of turn signal switch E2

M5 or M7

Actuation of turn signal by onboard power supply control unit M6 or M8

Key E2

Turn signal switch

M5 M6 M7 M8

Turn signal bulb, front left Turn signal bulb, rear left Turn signal bulb, front right Turn signal bulb, rear right

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Onboard power supply control unit Monitoring of light switch positions Light switch E1 is supplied with power directly from the battery. Therefore, it sends a fixed plausible signal in every position to the onboard power supply control unit. By way of independent signal input, the onboard power supply control unit can detect whether ignition is switched on or not. If the fixed plausible signal is changed by a fault, such as an open circuit in the wiring, it will change to implausible. The onboard power supply control unit will switch to emergency light control.

Signal sequence Headlights

Term. 15

J519

Term. NSL Term. NL Term. TFL Term. 56 Term. 58

E1 Term. 30

Rear light cluster Key E1 J519 Term. 56 Term. 58 Term. TFL

NSL NL

34

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Light switch Onboard power supply control unit Driving lights Side lights Daylight driving lights Function must be coded in onboard power supply control unit Coding differs in each country. Rear fog lamp Fog lights

Emergency light control

If the onboard power supply control unit detects a fault with the ignition switched on, the side lights and the dipped beam lights are switched on.

Example of light switch plausibility with ignition switched on

Switch position

Terminal 58

Terminal 56

Terminal TFL

Signal

Off

0V

0V

12 V

Plausible

Side lights on

12 V

0V

0V

Plausible

Driving lights on

0V

12 V

0V

Plausible

Off

0V

12 V

12 V

Implausible fault detection

Off

0V

0V

0V

Implausible fault detection

Off

12 V

12 V

0V

Implausible fault detection

Off

12 V

12 V

12 V

Implausible fault detection

In the case of all faults, an entry is made in the fault memory.

35

Onboard power supply control unit Bulb monitoring The function of the bulbs is monitored constantly. This monitoring takes place when the ignition is off (cold monitoring) and when the ignition is switched on (warm monitoring).

Cold monitoring The individual bulbs are supplied with a minimal charge four times for 500 ms when the ignition is switched on. This level of voltage enables the onboard power supply control unit to detect whether any of the bulbs are blown. mA

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Warm monitoring The actuation of the individual bulbs is via semi-conductor components that are housed in the onboard power supply control unit. They can detect overloads, short circuits or open circuits. mA

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Fault detection With both types of monitoring, once a fault is detected an entry is made in the fault memory and a fault warning is also displayed in the dash panel insert. A new bulb will be detected by the monitoring system once installed, the fault will be erased and the display cancelled.

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Additional bulb functions Various bulbs are dimmed to take on additional functions. If their proper function is needed, this is given priority.

Bulb

Additional function

Bulb

Additional function

Dipped beam, left and right

Dimmed daylight driving lights, left and right

Brake light, left and right

Dimmed rear lights, left and right approx. 18 %

Rear fog lamp left and right country-specific

Dimmed rear lights, left and right approx. 12 %

Additional function: Brake light as rear light Dimmed actuation of brake lights

Onboard power supply control unit

Actuation of brake lights for braking

Rear light cluster S307_024

Please observe the country-specific variations in the rear fog light function.

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Windscreen wiper system Wiper motor actuation Windscreen wiper motor actuation Information about the selected wiper stage is sent from the onboard power supply control unit via the LIN data bus to the wiper motor control unit J400 and from there to the wiper control unit, front passenger side J584. Both control units are located directly on the wiper motors.

The wiper system consists of a twin motor opposing action system without a mechanical connection between the wiper arms. The switch position of wiper switch E is sent directly to the steering column electronics control unit J527 and then via the convenience CAN data bus to the onboard power supply control unit J519.

The wiper motor control unit J400 manages control of the wiper motion and regulates the wiper control unit, front passenger side J584.

Actuation of wiper motors Drive train CAN data Dash panel insert bus CAN data bus Ambient temperature Road speed

D

J584 Term. 15 J400 LIN data bus

F266 E

J519

J527 J533 Convenience CAN data bus Key D E F266 J400 J519

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Ignition/starter switch Wiper switch Bonnet contact switch Wiper motor control unit Onboard power supply control unit

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J527 Steering column electronics control unit J533 data bus diagnosis interface J584 Wiper control unit, front passenger side

Wiper functions The wiper system features the following functions: -

Service and winter position Alternating rest position Speed dependent wiper stage reset Speed dependent intermittent delay Bonnet contact Synchronisation function Tip wiping stage 2 Prewash Follow up wash after wash/wipe function Trickle wipe Anti-blocking function Wiper control for rear window

Service and winter position If within 10 seconds after switching off the ignition, and with the vehicle stationary, the wiper switch is switched to the tip wiping position, the wipers move to the upper arc position. This function cannot be selected when the bonnet is open. S307_026

Service and winter position

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Windscreen wiper system Alternating rest position In order to prevent a permanent deformation of the wiper blades, the wiper arms move upwards slightly every second time they are switched off. In this way, the position of the wiper blades is changed. In addition, the rest position can also be altered by switching the ignition off several times. S307_027

Rest position after switching off first time

Rest position after switching off second time

Speed dependent wiper stage reset If the road speed drops below 4 km/h, the selected wiper speed will be reduced by one stage. When road speeds increases above 8 km/h, the wiper speed is reset to the selected stage. Resetting: Stage 2 to stage 1 - Terminal 15 on - Wiper switch at stage 2 - Road speed < 4 km/h

Stage 1 to intermittent operation stage - Terminal 15 on - Wiper switch at stage 1 - Road speed < 4 km/h (Intermittent delay 4 s)

40

S307_028

For reasons of clarity, only the driver's wiper is shown.

Speed dependent intermittent delay The speed of the four adjustable intermittent phases is dependent on the road speed of the vehicle. The delays between the individual wiper movements vary from 1.28 seconds in stage 1 at approx. 150 km/h to 24 seconds in stage 4 at approx. 4 km/h.

S307_029 4th stage 3rd stage 2nd stage 1st stage

Bonnet contact switch F266 If when the vehicle is stationary the bonnet is opened, the wiper motor control unit J400 switches the wipers off. If the bonnet was not closed correctly and opens at a speed of 2 km/h to 16 km/h, the wiper motor control unit J400 switches the wipers off in the same way. The isolation function can be cancelled again by operation of the wiper switch.

Bonnet contact switch

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At speeds greater than 16 km/h, the isolation function is not active. The signal is sent from the bonnet contact switch directly to the onboard power supply control unit and is then sent on further via the LIN data bus to the wiper motor control unit.

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Windscreen wiper system Synchronisation function If the windscreen wipers are not in their rest position when the ignition is switched off, these will be moved automatically to the rest position when the ignition is switched on and when the wiper switch E4 is actuated. This is either a parallel or individual movement. A system with an unsynchronised rest position is set straight with this procedure.

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Wiper paths during synchronisation

Tip wiping stage 2 If the tip wiping function is actuated for longer than two seconds, the wiper is switched to the second stage.

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Prewash When the wash/wipe function is actuated at speeds less than 120 km/h, the wiper will begin to operate after a prewash period of approx. 0.8 seconds, during which only the washer pump is active.

Follow up wash after wash/wipe function If the wash/wipe function is actuated for longer than 0.5 seconds, the follow up wiping function is actuated three times. If actuation time is less, follow up wiping is actuated twice.

Trickle wiping If the road speed of the vehicle is greater than 2 km/h, the wiper function is actuated once more 5 seconds after the last follow up wash (follow up wiping cycle).

Anti-blocking function The wiper system detects if the wipers are blokked by the amount of current that is drawn. If there is a blockage in area A, it will attempt to remove this a total of five times. If it is unable to move the blockage, the wipers will remain in the rest position. The blockage will have to be removed manually. If the wiper blades are frozen to the bottom part of the windscreen, the wipers will attempt to break free a total of five times. After the fifth attempt, there will be no wiper motion.

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Blocking

A

S307_034

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Rear window wiper system Rear window wiper control Rear window wiper actuation features three operating modes:

- Ignition switched on - Windscreen wiper is in intermittent stage 1 or stage 2 Recognition of the selected stage is via the convenience CAN data bus. The signal comes from the steering column electronics control unit. - Reverse gear or R selected Recognition is via the reverse light switch or via the gear selector position, the automatic gearbox control unit, the drive train CAN data bus, the data bus diagnosis interface and the convenience CAN data bus. - Tailgate closed Recognition is via the convenience system central control unit.

- Reverse wiping - Rear intermittent wiping - Rear window wash/wipe operation

Reverse wiping The reverse wiping function actuates the rear window wiper to clear the screen if, when the front windscreen wiper is switched on, reverse gear is selected. Intermittent stage Stage 1 or 2

Conditions for activation:

One wipe Rear intermittent wipe

Signal pattern of rear window wiper

Drive train CAN data bus

V12 D Term. 15

Information about selected reverse gear

J519 J393

E

J527 J533 Convenience CAN bus Key D E J393 J519

44

S307_035

Ignition/starter switch Wiper switch Convenience system central control unit Onboard power supply control unit

J527 Steering column electronics control unit J533 data bus diagnosis interface V12 Rear window wiper motor

Rear intermittent wiping If the rear intermittent wiper stage is selected, the rear window wiper operates in delayed stages. Conditions for activation: - Ignition switched on - Rear window intermittent wiper stage on: Recognition is via the wiper switch, the steering column electronics control unit and the convenience CAN data bus. - Tailgate closed Recognition is via the convenience system central control unit.

S307_036

Rear window wash/wipe operation In rear window wash/wipe operation, the double washer pump delivers washer water to the rear window and the rear window is cleared. Conditions for activation: - Ignition switched on - Rear window wash/wipe operation stage on: Recognition is via the wiper switch, the steering column electronics control unit and the convenience CAN data bus. - Tailgate closed: Recognition is via the convenience system central control unit.

S307_037

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Dash panel insert Control unit with display unit in dash panel J285 Control lamps and displays The control unit with display unit in the dash panel insert actuates the display, the analogue display instruments and the control lamps.

Dash panel insert LED control lamps

Display, digital screen

S307_038

Rev counter, analogue display

Speedometer, analogue display Coolant temperature, analogue display

The coolant temperature display on vehicles with map controlled cooling is at a constant 90 °C at coolant temperatures between 75 °C and 107 °C. The display on vehicles without map controlled cooling is at a constant 90 °C at coolant temperatures between 75 °C and 115 °C. This way, a continually changing figure in the display is avoided.

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Fuel gauge, analogue display

Display

Lowline variant

The following variants are designed for the display:

20:14

Lowline with displays for km

-

Clock Mileage reader Trip counter Selector lever position

Midline with additional displays to Lowline variant

trip

20375

167.5

PRN DS

3 S307_039

Midline variant

20:14

- Ambient temperature - Multi-function display or - Warning messages instead of multi-function display and ambient temperature

7.8 ltr./100 km 13.5 C° km

trip

20375

167.5

P R N D S 2

S307_040

Highline with additional displays to Midline variant

Highline variant

20:14

- Sender display - Warning symbols instead of multi-function display and ambient temperature

7.8 ltr./100 km 13.5 C° km

trip

20375

167.5

PRN DS

3 S307_041

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Dash panel insert Equipment with control lamps Symbol

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Control lamp

Lowline

Midline

Highline

Warning message or warning

Airbag

X

X

X

Airbag fault Airbag belt tensioner deactivated

ABS

X

X

X

ABS

Brake pad wear

X

X

Pictogram

Check brake pad

Low brake fluid level

X

X

X

Stop - Brake fluid See manual

Preglow period (diesel engines)

X

X

X

Dynamic oil pressure warning

Turn signal

Turn signal

Turn signal pictogram

Electronic power control EPC

X

X

X

Electronic power steering

X

X

X

Electric brake pressure distribution

X

X

X

Warning buzzer (3 times)

Parking brake system

X

X

X

Handbrake applied

ESP TCS

X

X

X

Left turn signal

X

X

X

Acoustic check

Right turn signal

X

X

X

Acoustic check

Trailer turn signals

X

X

X

Main beam headlights

X

X

X

Stop - Oil pressure - Engine off See manual

Symbol

Control lamp

Lowline

Midline

Highline

Cruise control system

X

X

X

Bulb failure

X

X

X

e.g. Front left dipped beam light defective

Tailgate door open

X

X

Pictogram

e.g. Tailgate open

Fuel reserve

X

X

Pictogram

Please fill up Warning buzzer (once)

Low coolant level or overheating

X

X

Pictogram

Stop - Check coolant See manual Warning buzzer (3 times)

Alternator

X

X

X

Engine check EOBD

X

X

X

Engine fault - Workshop Exhaust gas - Workshop

Bonnet open

X

X

Pictogram

Door warning! Bonnet! Warning buzzer (once) if v > 6 km/h

Rear fog light

X

X

X

Oil level

X

X

Pictogram

Check oil level Oil sensor - Workshop

Tyre pressure monitor

X

X

X

Warning buzzer (once)

Shift lock

X

X

X

Seatbelt

X

X

X

Please apply seatbelt Gong

Low washer water

X

X

Pictogram

Replenish washer water Warning buzzer (once)

Immobiliser

Turn signal

Turn signal

Turn signal

Immobiliser active Warning buzzer (once)

Warning message or warning

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Immobiliser The fourth generation immobiliser Control unit The immobiliser control unit J362 can be found in the dash panel insert, as with immobilisers of the third generation. The diagnosis connection is made via address word 25. Communication is only possible via the diagnosis CAN data bus with vehicle diagnosis, testing and information system VAS 5051.

Diagnosis

Dash panel insert CAN data bus

J285

VAS 5051 Diagnosis CAN data bus

T16

J533

VAS 5051/5A

S307_042

Key J285 J533 VAS 5051 VAS 5051/5A T16

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Control unit with display unit in dash panel insert data bus diagnosis interface Vehicle diagnosis, testing and information system Diagnosis lead 3 m Diagnosis connection

Changes compared to the third generation immobiliser

Brand identification The immobiliser components of all Group brands are different. Adaption of components from other Group brands in Volkswagen vehicles is not possible.

S307_043

Preprogrammed key The vehicle keys are preprogrammed by the manufacturer with a basic code. This basic code includes a specific manufacturer code. Matching the key to a vehicle is only possible if it has the correct manufacturer code.

Basic code

S307_044

51

Immobiliser Matching Enabling the matching function is done via the vehicle diagnosis, testing and information system VAS 5051. The personal identification number (PIN) for matching is currently available via the dealer online access system (HOLZ). In future, matching will be carried out via an online connection.

Exchanging the engine control unit The engine control unit is enabled in the same way as the third generation immobiliser. Two of the three adapted components (key and dash panel insert) must remain in the vehicle. For adaption of a new control unit, this can be done without a personal identification number. For adaption of a control unit that was previously installed in a different vehicle, a personal identification number is required.

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Exchanging the dash panel insert Adaption is carried out in the same way as for the third generation immobiliser. Likewise, two of the three adapted components (key and engine control unit) must remain in the vehicle. For adaption of a new dash panel insert, this can be done without a personal identification umber. A personal identification number is required for a previously used dash panel insert. Following exchange, the immobiliser control unit J362 will detect an unknown key. For this reason, there is a blocking period of five minutes during which time the engine cannot be started.

With the exchange of more than one component, all three items must be renewed as less than two of the matched components are left in the vehicle.

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Convenience and infotainment settings Personalisation The user based settings for different unit functions in the convenience and infotainment system are made via an operating unit and a display.

Operation is via a control lever on the steering wheel. Selection from the menu is made via the display in the dash panel insert. The settings selected are stored in the control unit, which is responsible for the control of each function. Transfer of the necessary information between the control unit with display unit in dash panel insert and the other control units is managed by the CAN data bus.

J285

Steering column switch

J533

J527

J519 Key J162 Heater control unit J285 Control unit with display unit in dash panel insert J393 Convenience system central control unit J519 Onboard power supply control unit J527 Steering column electronics control unit J533 data bus diagnosis interface

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J393

J162 S307_045

For precise details on operation, please refer to the operating instructions.

Lighting Headlights One touch attachment The H7 bulbs are connected to the reflector by means of a one touch attachment. The old means of attachment with clip and electrical connector has been discontinued. By means of one touch, the attachment of the bulbs can be released with a twisting action.

S307_064

Release from attachment by twisting to left

Thereafter, the bulb is pulled out of the attachment.

S307_060

Pull bulb out of attachment

The functional description of the Bi-Xenon headlights that are installed can be found in SSP 251 "The Passat 2001". The procedure for renewing a bulb can be found in ELSA.

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Service Diagnosis The transfer of data necessary for diagnosis to vehicle diagnosis, testing and information system VAS 5051 or vehicle diagnosis and service information system VAS 5052 is via the diagnosis CAN data bus.

VAS 5051

Data transfer to VAS 5051 is only possible via diagnosis leads VAS 5051/5A or VAS 5051/6A. For vehicle diagnosis and service information system 5052, diagnosis lead VAS 5052/3 should be used.

VAS 5051/6A

These diagnosis leads are suitable for the transfer of data via the diagnosis CAN data bus. The COM lead used until now is still required for diagnosis of the engine and gearbox control units in OBD mode. Therefore, diagnosis with other diagnosis leads is only possible in the engine control unit and automatic gearbox control unit. VAS 5052

56

J285

VAS 5051/5A

Dash panel insert CAN data bus

Diagnosis CAN data bus J533 T16

Communications line

Drive Train CAN data bus

Convenience CAN data bus

Infotainment CAN data bus

VAS 5052/3

S307_051

Key J285 J533 T16 VAS 5051 VAS 5051/5A VAS 5051/6A VAS 5052 VAS 5052/3

Control unit with display unit in dash panel insert data bus diagnosis interface Diagnosis connection Vehicle diagnosis, testing and information system Diagnosis lead 3 m Diagnosis lead 5 m Vehicle diagnosis and service information system Diagnosis lead 3 m

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Test yourself

1. Which data bus systems are used in the Volkswagen Touran? … a) The CAN data bus and the LIN data bus. … b) The MOSFET data bus, the LIN data bus and the MOST bus. … c) The D2B data bus, the A data bus and the CAN data bus.

2. Where can the data bus diagnosis interface be found? … a) In the dash panel insert. … b) Under the centre console next to the airbag control unit. … c) Under the dash panel above the relay carrier.

3. Which control units belong to the dash panel insert CAN data bus? … a) The onboard power supply control unit, the automatic gearbox control unit and the trailer detector

control unit. … b) The control unit with display unit in dash panel insert and the data bus diagnosis interface. … c) The Motronic control unit and the diagnosis connection.

4. The LIN data bus transfers data at a rate of … a) 1 kbit/s to 20 kbit/s. … b) 100 kbit/s to 500 kbit/s. … c) 21 Mbit/s.

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5. Which functions are controlled by the onboard power supply control unit? … a) Turn signal control, heated rear window, fuel pump readiness. … b) Windscreen and rear window wipers, central locking, instrument illumination. … c) Load management, alternator readiness, starter isolator.

6. What is the main role of the load management system? … a) To ensure that there is always enough electrical power to turn the engine over. … b) With electronic charge indication, it warns the driver when the vehicle is overcharged. … c) It prevents overloading of the engine by irregular operation.

7. What must be observed when operating the vehicle diagnosis, testing and information system VAS 5051 on the Touran? … a) For diagnosis, only diagnosis leads VAS 5051/5A and VAS 5051/6A should be used. … b) Diagnosis can be carried out in all areas using V.A.G 1551 or V.A.G 1552. … c) Diagnosis is only possible using VAS 9119.

Answers: 1. a 2. c

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3. b

4. a

5. a, c

6. a

7. a

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For internal use only © VOLKSWAGEN AG, Wolfsburg All rights and the right to make technical alterations reserved 000.2811.27.20 Technical status 02/03

❀ This paper was manufactured from pulp that was bleached without the use of chlorine.