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Volkswagen The Golf 2004 Service Training
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Volkswagen The Golf 2004 Service Training

Electrical system design and function self-study programme 319
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Service Training
Self-study programme 319
The Golf 2004
Electrical system
Design and function

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Summary of Contents for Volkswagen The Golf 2004

  • Page 1 Service Training Self-study programme 319 The Golf 2004 Electrical system Design and function...
  • Page 2 The most striking change compared with the previous model is the rear lighting of the Golf 2004. The one-piece light unit, common on the previous model, has now been replaced by a two-piece light unit. This is comprised of a separate independent light element in the side part and a fixed element in the tailgate.

  • Page 3: Table Of Contents

    Contents Introduction ........4 LIN data bus .

  • Page 4: Introduction

    Introduction Fuse boxes and relay slots in vehicle electrical system Fitting locations The onboard electrical system of the Golf 2004 is similar to that of the Touran. Golf 2004 and Touran vehicles are based on the same platform. The onboard electrical system of the Golf 2004 is of the decentral design.
  • Page 5 Relay carrier, on left beneath dash panel, above onboard power supply control unit Relay carrier of onboard power supply control unit on left under dash panel Fuse box, on left in dash panel S319_001...
  • Page 6 Introduction The networking concept Overview of networked control units In order that data can be transferred without J220 conflict or interference between the individual control units, these are connected together in a network via various data bus systems. The data bus diagnostic interface J533 (Gateway) provides an interface for the J431 following data buses:...
  • Page 7 G419 Ignition/starter switch E221 Operating unit in steering wheel G85 Steering angle sender J743* J104 G273 Interior monitoring sensor J217 G384 Vehicle inclination sender G397 Rain and light detector sensor G419 ESP sensor unit Anti-theft alarm system horn J104 ABS with EDL control unit J136 Seat and steering column adjustment control J587...
  • Page 8 Introduction Control units in drivetrain CAN data bus Control units and fitting locations The adjacent illustration shows the control units of the drivetrain CAN data bus and associated fitting locations. The data is transferred at a rate of 500 kbit/s. Transfer is made via the orange/black CAN high wire and orange/brown CAN low wire.
  • Page 9 Headlight range control, control unit J431, on right of glove compartment Steering column electronics control unit J527, beneath steering column switch Data bus diagnostic interface J533, beneath dash panel, above accelerator pedal Automatic gearbox control unit J217, on left in wheel housing S319_002...
  • Page 10 Introduction The control units in the drivetrain CAN data bus Control units and fitting locations The adjacent illustration shows the control units of the convenience CAN data bus and associated fitting locations. The speed of data transfer is 100 kbit/s. The data is transferred via the orange/green CAN high wire and orange/brown CAN low wire.
  • Page 11 Parking aid control unit J446, in rear right side panel Trailer detection control unit J345, in rear right side panel Onboard supply control unit J519, under dash panel on relay carrier Door control units J386, J387, J388, J389, installed in doors Data bus diagnostic interface J533, S319_004 beneath dash panel, above accelerator...
  • Page 12 Introduction The control units in the infotainment CAN data bus Control units and fitting locations The adjacent illustration shows the control units of the infotainment CAN data bus and associated fitting locations. The infotainment CAN data bus transfers data at a rate of 100 kbit/s. The CAN high wire is orange/purple and the CAN low wire is orange/brown.
  • Page 13 Control unit with display for radio and navigation J503 or Radio R, in centre console CD changer R41, in centre console, beneath front armrest S319_005...
  • Page 14 Introduction The control units in the dash panel insert CAN data bus and in the diagnosis CAN data bus Dash panel insert CAN data bus Information is exchanged via the dash panel insert CAN data bus between the dash panel insert control unit and the data bus diagnostic interface.
  • Page 15 Data bus diagnostic interface J533, beneath dash panel, above accelerator pedal 16-pin connector, diagnosis interface T16, on left beneath dash panel S319_006...

  • Page 16: Lin Data Bus

    LIN data bus The LIN data bus as sub data bus system Local Interconnect Network (LIN) defines a local Information is exchanged in the LIN data bus system in which all associated components within system via a master control unit and up to a specific area are located.
  • Page 17 Master control unit Slave control unit The control unit connected to the CAN data bus In the LIN data bus system, individual control takes on the master functions of the LIN data bus units, sensors or actuators can act as slave system.

  • Page 18: Onboard Power Supply

    Onboard power supply The electrics box Housed in the electrics box are the fuses for components of the engine compartment and the interior. The connection between electrics box and battery is very short (approx. 500 mm), which enables use of the battery as a high frequency filter between the consumers mounted directly on the box.
  • Page 19 The electrics box and pre-fuse box are located in a housing in the engine compartment. Electrics box In addition to the fuses, the following relays can also be found in the electrics box: Terminal 15 voltage supply relay J329 Terminal 30 voltage supply relay J317 Terminal 50 voltage supply relay J682 Fuel pump relay J17 (not diesel and FSI)
  • Page 20 Onboard power supply The relay carrier Fitting location On the left under the dash panel is a relay carrier and the onboard supply control unit. Relay carrier Additional relays may be included on the relay carrier depending on the equipment level. On vehicles with electric seat adjustment, the automatic safety device (thermal safety) is installed here.
  • Page 21 The fuse box Fitting location The fuse box can be found on the left of the dash panel behind a cover. Fuses Included in the fuse box are fuses for the electrical components in the vehicle. S319_013 Please refer to the electronic service information system (ELSA) for current assignment details of the fuse box.
  • Page 22 Onboard power supply The data bus diagnostic interface J533 Due to the vast range of functions in the vehicle, large amounts of data must be transferred. To guarantee optimal exchange of data, several data bus systems are required. The function previously integrated in the dash panel insert or onboard supply control unit is now assumed by the separate data bus diagnostic interface (Gateway).
  • Page 23 Transport mode For transportation of the vehicles to the Transport mode can only be selected during the dealerships, power consumption should be kept first 150 km. The data bus diagnostic interface to a minimum to protect the battery from possible then switches transport mode off, after which discharge.
  • Page 24 Onboard power supply The onboard supply control unit J519 Fitting location The onboard supply control unit can be found on the left underneath the dash panel where it forms a unit with the relay carrier. S319_065 Versions Onboard supply control unit The onboard supply control unit is available in two versions.
  • Page 25 Tasks The onboard supply control unit actuates and controls the following functions: - Rear window wiper - Exterior light control with bulb monitoring When reverse gear is selected, the rear In the event of bulb failure, the relevant window wiper is activated. warning lamp will ligh up or a text message is displayed in the dash panel insert.
  • Page 26 Onboard power supply The exterior light control Main headlights The twin headlights with dipped and main beam reflectors are equipped with H7 bulbs on the medium version. To improve visibility for other road users, the turn signals are located linearly beneath the dipped and main beam lights, i.e.
  • Page 27 Tail lights Installed for the first time in the Golf 2004 are the split rear lights with round elements, which are comprised of several elements. The light unit integrated in the side panel is responsible for the tail, brake and turn signal light functions.
  • Page 28 Onboard power supply The convenience lighting Coming home When occupants alight from the vehicle and If the rotary light switch is in the dipped beam close the doors, including the tailgate, the vehicle position, the lights are switched off completely surround lighting is activated for a short period.
  • Page 29 The following lights are switched on by the coming home and leaving home function: Front side lights Dipped beam headlights Tail lights Number plate light S319_070 Side light Dipped beam headlights Activation or deactivation of the coming home and leaving home function and the lighting period are set in the dash panel insert via the "Light and Vision"...
  • Page 30 Onboard power supply The windscreen wiper system Wiper actuation The wiper system comprises of a single motor with mechanical connection between the wiper arms. The switch positions of wiper switch E are sent directly to the steering column electronics control unit J527 and then via the convenience CAN data bus to the onboard supply control unit J519.
  • Page 31 Overview of wiper system J104 G397 J400 F266 J519 J527 J533 S319_016 Ignition/starter switch J400 Wiper motor control unit Windscreen wiper switch J519 Onboard supply control unit F266 Bonnet contact switch J527 Steering column electronics control unit G397 Rain and light detector sensor J533 Data bus diagnostic interface J104 ABS with EDL control unit...
  • Page 32 Onboard power supply Service/winter position If, within 10 seconds of switching off the ignition, the windscreen wiper switch is switched to the tip wiping position, the wipers will move to the upper end position of the wiped arc. When the wiper arms are in the service/winter position, the wiper blades can be renewed without restriction or the wiper arms can be lifted up to prevent the blade rubber from freezing to...
  • Page 33 The quick lock system - Easy removal/assembly - Improved longevity - Improved anti-crimp and frost protection - Corrugated-type tubes Engaged Included in the new features of the new Golf 2004 is also the quick lock system for the windscreen washer system. With this system, the windscreen washer hoses are replaced with corrugated-type tubes, which avoids the risk of crimping.
  • Page 34 Onboard power supply Control unit with display in dash panel insert J285 The control unit with display in the dash panel Diagnosis insert receives its information via the data bus Diagnosis of the control unit with display in diagnostic interface J533 and the dash panel the dash panel insert is carried out using the insert CAN data bus.
  • Page 35 Immobiliser control unit J362 Immobiliser IV Adaption channels and fault memories are dealt The immobiliser control unit J362 is integrated in with separately. the dash panel insert control unit. With the The immobiliser requires its own address word 25 ignition switched on, it enables or disables for diagnosis.
  • Page 36 Onboard power supply The warning lamps in the dash panel insert S319_017 The dash panel insert of the diesel engine Symbol Control lamp Lowline Midline Highline Warning message or warning Airbag Airbag fault! Airbag Belt tensioner deactivated! Anti-lock braking system (ABS) Brake pad wear indicator Pictogram...
  • Page 37 Symbol Warning lamp Lowline Midline Highline Warning message or warning Left turn signal Acoustic check Right turn signal Acoustic check Main beam headlights Cruise control system (CCS) Bulb blown / driving light e.g. front right dipped beam light defective defective! Tailgate / door open Pictogram e.g.
  • Page 38 Onboard power supply The convenience system central control unit J393 Fitting location The convenience system central control unit can be found beneath the dash panel, on the right behind the glove compartment. Tasks Control of central locking function Actuation of rear doors Actuation of tank flap release Actuation of tailgate lock release Actuation of anti-theft alarm system via...
  • Page 39 CAN data bus. In the Golf 2004 there is no warning lamp in the dash panel insert control unit J285 for trailer detection. Retrofitting of the trailer detection control unit is Installation of aftermarket control units, which possible.

  • Page 40: Tyre Pressure Monitor

    Tyre pressure monitor The tyre pressure monitoring system The tyre pressure monitoring system is a software System overview module in the ABS control unit, which detects Tyre pressure monitor warning lamp slow and gradual loss of air from the tyres. From current ABS and ESP data (wheel speed, current vehicle status), it filters out fine changes and compares the information with reference data.
  • Page 41 Calibration Since the tyre characteristics can change, a calibration procedure must be performed each time the tyre pressure is altered, or when a wheel is changed, to allow new reference data to be calculated. Calibration procedure System fault To start the calibration procedure, the tyre In the event of a fault in the ABS with EDL control pressure monitor display button must be pressed unit, tyre pressure monitoring will be stopped...

  • Page 42: Convenience And Safety Electronics

    Convenience and safety electronics The exterior mirrors In the Golf 2004, electrically folding exterior mirrors are available as an option. Operation of the mirrors is via a mirror setting switch in the driver's door. If the switch is turned to the "fold in" position, the exterior mirrors will fold in automatically.
  • Page 43 New features and installation of the mobile telephone For the telephone system in the Golf 2004, a Nokia 6310i is offered as an option. Equipment Nokia 6310i Telephone interface Telephone mounting Infoservice Buttons for information and breakdown button assistance Microphone installed in bulb module...
  • Page 44 Convenience and safety electronics Personalisation The user based settings for different unit Operation is via control levers on the steering functions in the convenience and infotainment column switch and selection is made from the system are made via an operating unit and menu via the display in the dash panel insert.
  • Page 45 Example of menu guide Light & vision Coming home Leaving home Footwell light Convenience signalling Wipers Factory default Convenience Convenience signalling OFF signalling ON Back Back Convenience Convenience signalling ON signalling OFF Back Back Convenience Press and release signalling OFF Press and hold Back For precise details on operation,...
  • Page 46 Convenience and safety electronics The radios in the Golf 2004 Radio R 100 The R100 radio is available to key account holders, e.g. fleet operators. It is a radio system with the following functions: - Two loudspeaker channels (front only,...
  • Page 47 Radio RCD 500 The top radio in the 2004 Golf is the RCD 500 with the following functions: - Four loudspeaker channels (each 20 W) - RDS FM/AM Europe Radio (AM without LW) - Display of stored stations with RDS names - FM 2 diversity tuner - Operation via multi-function steering wheel and multi-function display...
  • Page 48 Convenience and safety electronics The aerials AM circuit In the Golf 2004, various aerial systems are installed depending on the equipment level. No provision has been made to allow retrofitting of a rear window aerial. Radio R 100 FM circuit (+)
  • Page 49 MFD 2 radio navigation system AM circuit The MFD 2 radio navigation system does not feature an internal diversity tuner. It has an external tuner, to which two rear window aerials are connected. FM circuit (+) FM circuit (-) Aerial amplifier (impedance transformer) External diversity...
  • Page 50 Convenience and safety electronics Multi-function steering wheel System overview Data is exchanged between the multi-function J527 steering wheel and the steering column switch module via a LIN data bus. Communication of the signals from the steering E221 column electronics control unit to the data bus diagnostic interface is done via the CAN data J533 bus, from where these signals are then passed on...
  • Page 51 Multi-function buttons Button illumination is controlled by terminal 58d. There is only one symbol code, which communicates information from the button via S319_025 the steering column switch module to the CAN data bus. For this reason, button functions can only be carried out individually. If no telephone is installed, the telephone buttons are non-functional.
  • Page 52 Convenience and safety electronics Headliner wiring with printed circuit wires By the use of printed circuit wires, an increase in Sun visor switch connection headroom has been achieved. Routing between the headliner and roof is uncomplicated due to Vanity mirror light the fact that the printed circuit wiring can be connection attached to the headliner.
  • Page 53 Tuning guard In the Golf 2004, a special guard is installed for the first time to protect the engine control unit. The tuning guard prevents engine control unit data from being accessed by unauthorised persons. Any attempt to alter the permanently stored data will be detected by the engine control unit.

  • Page 54: Service

    Service Rear wiper renewal To remove the rear wiper blade from the wiper arm, the mounting must be moved to the right in the direction of the arrow. After the wiper blade has been released, the wiper arm must be lifted away from the rear window to allow the wiper blade to be removed from the mounting.

  • Page 56: Test Yourself

    Test yourself 1. Where can the data bus diagnostic interface J533 be found? a) On the right beneath the dash panel, behind the glove compartment b) In the dash panel insert c) Beneath the dash panel, above the accelerator pedal 2.
  • Page 57 4. Which control units are responsible for tyre pressure monitoring? a) Control unit in dash panel insert J285, data bus diagnostic interface J534 and ABS with EDL control unit J104 b) ABS with EDL control unit, data bus diagnostic interface, dash panel insert control unit and tyre pressure monitor display control unit a) Data bus diagnostic interface J533, ABS with EDL control unit J104 and control unit with display in dash panel insert J285...
  • Page 58 Test yourself...
  • Page 60 For internal use only © AG, Wolfsburg VK 36, Service Training All rights and the right to make technical alterations reserved 000.2811.40.20 Technical status 10/03 This paper was manufactured from pulp that was bleached without the use of chlorine.