Volkswagen Passat 2006 Service Training
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Volkswagen Passat 2006 Service Training

Electrical system design and function
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Service Training
Self-study Programme 340
The Passat 2006

Electrical System

Design and Function

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Summary of Contents for Volkswagen Passat 2006

  • Page 1: Electrical System

    Service Training Self-study Programme 340 The Passat 2006 Electrical System Design and Function...
  • Page 2 The developers have paid particular attention to comfort in this car. This self-study programme should help you get to know the electrical system in the Passat 2006 and become familiar with the new features. S340_072 Important...

  • Page 3: Table Of Contents

    Contents Introduction ..........4 Data Bus Systems Control Units for Powertrain CAN Data Bus .

  • Page 4: Introduction

    Introduction Fuse Boxes and Relay Locations in the Onboard Power Supply Locations The Passat 2006 onboard power supply is decentralised and is therefore similar to the Golf 2004 system. The Passat also has a fuse box on the right-hand side of the dash panel due to the large number of electrical consumers.
  • Page 5 Relay carrier, on left under dash panel, above onboard power supply control unit Relay carrier on onboard power supply control unit, on left under dash panel S340_001 Fuse box, on left in dash panel...
  • Page 6 Introduction Networking Concept Overview of networked control units The data bus diagnostic interface J533 forms the interface for communication among the J428 following data bus systems: J788 - Powertrain CAN data bus J623 J583 - Convenience CAN data bus - Infotainment CAN data bus - Combi CAN data bus - Diagnostics CAN data bus J745...
  • Page 7 E221 Operating unit in steering wheel E415 Entry and start authorisation switch G85 Steering angle sender G273 Interior monitoring sensor G384 Vehicle inclination sender G397 Rain and light detector sensor G419 ESP sensor unit G419 J540 H12 Alarm horn J104 ABS control unit J217 J136 Seat and steering column adjustment J492...

  • Page 8: Data Bus Systems

    Data Bus Systems Control Units for Powertrain CAN Data Bus Control units and locations Headlight range control, The adjacent diagram shows the control units control unit J431, that are involved in the powertrain CAN data on right-hand side of bus communication as well as their locations. glove compartment The data transfer speed is 500kbit/s.
  • Page 9 Selector lever sensors control unit J587, under centre console at front Airbag control unit, under centre console at front Four-wheel drive control unit J492 *, on the Haldex coupling, in front of the rear axle Steering column electronics control unit J527, under the steering column switch Data bus diagnostic interface J533, on left under dash panel...

  • Page 10: Control Units For Convenience Can Data Bus

    Data Bus Systems Control Units for Convenience CAN Data Bus Control units and locations Front passenger seat position with memory J521, The adjacent diagram shows the control units under passenger seat that are involved in the convenience CAN data bus communication as well as their locations. The data transfer speed is 100 kbit/s.
  • Page 11 Parking aid control unit J446, in the side section at rear right Trailer detector control unit J345, in the side section at rear left Multifunction steering wheel control unit J453, in the steering wheel Steering column electronics control unit J527, in the steering column Seat and steering column adjustment control unit with memory J136,...

  • Page 12: Control Units For Infotainment Can Data Bus

    Data Bus Systems Control Units for Infotainment CAN Data Bus Combi and Diagnosis Control units and locations The adjacent diagram shows the control units that are involved in the infotainment and combi CAN data bus communication as well as their locations.
  • Page 13 Control unit with display for radio and navigation J503, in the dash panel Mobile telephone operating electronics control unit J412, under passenger seat Control unit with display in dash panel insert J285 Digital sound package control unit J525, under driver’s seat Data bus diagnostic interface J533, in footwell on driver’s side, near pedals...

  • Page 14: Sub-Bus Systems

    Data Bus Systems Sub-bus Systems LIN data bus The Local Interconnect Network is a local system that transfers data via a single-wire connection at a data transfer rate of 1 - 20 kbit/s. The transfer rate is stored in the master control unit software.
  • Page 15 Electromechanical CAN data bus The data transfer speed of the electromechanical parking brake CAN data bus is 500 kbit/s. The transfer occurs via the CAN high cable and the CAN low cable. The CAN cables are twisted together for secure data transfer. The powertrain CAN data bus is not suitable for use with a single cable –...
  • Page 16 Data Bus Systems Cornering Lights (Advanced Frontlighting System) CAN Data Bus The data transfer speed of the cornering light CAN data bus is 500 kbit/s. The transfer occurs via the CAN high cable and the CAN low cable. The CAN cables are twisted together for secure data transfer.
  • Page 17 Sensor CAN data bus The data transfer for the sensor CAN data bus is the same as the cornering light CAN data bus and transfers the data between the engine control unit and the NOx sensor control unit. J583 J623 J533 S340_065 Legend...

  • Page 18: Onboard Power Supply

    Onboard Power Supply Electronics Box Location The electronics box is mounted at the front right in the engine compartment. Description All fuses and relays for protection and control of the electrical components in the engine compartment are accommodated in the electronics box.
  • Page 19 Electronics Box The electronics box also contains the following relay in addition to the fuses for the components in the engine compartment: - Voltage supply relay terminal 30 J317 S340_011 Back-up fuse box The back-up fuse box contains the fuses for - the alternator, - the electromechanical power steering, - the radiator fan,...

  • Page 20: Relay Carriers And Fuse Boxes

    Onboard Power Supply Relay Carriers and Fuse Boxes Locations The relay carrier and the onboard power supply control unit are under the left-hand side of the dash panel. Relay carrier The relays connected to the relay carrier depend on the vehicle version and the equipment. On vehicles with heated seats, the circuit breakers for the heating elements (thermal fuses) are also mounted on the relay carrier.
  • Page 21 Left-hand fuse box The fuse box is on the left-hand side of the dash panel behind the cover. S340_013 Right-hand fuse box The fuse box is on the right-hand side of the dash panel behind the cover. S340_014 Please refer to the ELSA electronic service information system for the current assignment of the fuses.

  • Page 22: Onboard Power Supply Control Unit

    Onboard Power Supply Onboard Power Supply Control Unit J519 Location The onboard power supply control unit is on the left underneath the dash panel and forms a unit with the relay carrier. S340_009 Versions The Passat is equipped with two different versions of the onboard power supply control unit.
  • Page 23 Tasks The onboard power supply control unit switches and controls the following functions: Outside light control with bulb monitoring Front windscreen wiper The blown bulb is indicated by the The CAN data bus signals are forwarded from corresponding warning light or as a text in the the onboard power supply control unit to the dash panel insert.

  • Page 24: Exterior Lights

    S340_015 Xenon headlights The Passat 2006 can be ordered with optional Bi-Xenon headlights with cornering light function. S340_016 Xenon headlights are run with high-voltages of several 10,000 volts. Contact with this voltage can be fatal.

  • Page 25: Tail Lights

    Tail lights Design The tail lights feature the double round light design. They are two-piece. Tail lights in side section The tail light, brake lights and indicators use LEDs and are integrated in the side section. The advantages of LEDs over bulbs are faster response times, better signal formation and greater homogeneity of the illuminated areas.
  • Page 26 S340_020 sensor has detected day-time or light, the symbol will be illuminated light green. You will find further information on use of the rotary light switch and the warning lights in the Passat 2006 operating manual.
  • Page 27 Indicator functions The following indicator modes are available in the Passat 2006: - Hazard warning lights - Central locking flashing - Crash warning lights - Anti-theft alarm flashing - Emergency stop warning lights - Turn signals - Lane change flash The individual operating modes have different priorities.
  • Page 28 Onboard Power Supply Exterior lights functional diagram S340_021 Legend Immobilizer reading unit Main beam warning lamp Light switch Side light warning lamp Turn signal switch Hazard warning light system warning lamp Hazard warning light switch Rear fog light warning lamp Headlight dipper/flasher switch Trailer operation warning lamp Fog light switch...
  • Page 29 S340_069 Input signal M17 Right reversing light bulb M25 High level brake light bulb Output signal M29 Left dipped beam bulb Positive M30 Left main beam bulb Earth M31 Right dipped beam bulb Data bus M32 Right main beam bulb N360Steering column lock control element N376 Ignition key withdrawal lock solenoid Fuse...
  • Page 30 Onboard Power Supply Automatic headlight control Dusk function E415 G397 If light switch E1 is set to “automatic headlight control”, the rain and light detector sensor G397 automatically measures the light, e.g. when entering a tunnel, and sends a signal to the onboard power supply control unit to automatically switch on the driving lights.
  • Page 31 Vehicle lights Emergency light mode If the onboard power supply control unit is not capable of controlling the car lights due to a processor malfunction, an additional piece of hardware will take over the following lights: - Brake light - Side light - Dipped beam Light functions The following lights have additional functions:...

  • Page 32: Data Bus Diagnostic Interface

    Onboard Power Supply Data Bus Diagnostic Interface J533 Function Due to the high proportion of networked functions, large quantities of data have to be transferred. To ensure trouble-free data exchange, several data bus systems are required to exchange data between each other. The data bus diagnostic interface links these data buses as a gateway interface and allows data transfer.
  • Page 33 Transport mode The car battery can be discharged during long transportation and standing times due to no-load currents. Transport mode is activated to keep power consumption as low as possible. Control unit with display in dash panel insert J285 indicates that transport mode is active. While transport mode is active, the car can be started and can be driven normally.

  • Page 34: Control Unit With Display In Dash Panel Insert

    Onboard Power Supply Control Unit with Display in Dash Panel Insert J285 Function The control unit with display in dash panel insert receives its information for the display unit and warning lights from the various control units via the data bus diagnostic interface J533 and via the combi CAN data bus.
  • Page 35 Variants The gauges in the display in the dash panel insert Y24 are divided into three versions. Lowline version The lowline version has eight LED warning lights (E) and a semi-dot liquid crystal display (LCD) (F). S340_031 Midline version The midline version has eight LED warning lamps (E), a mini-dot display (F), a semi-dot LCD in the speedometer (O) and in the rev counter (N).
  • Page 36 Onboard Power Supply Equipped with warning lamps Symbol Warning lamp Lowline Midline Highline Warning text or warning Airbag Airbag fault Airbag Belt tensioner deactivated (anti-lock brake system) Brake pad wear Pictogram Check brake pad Brake fluid low Stop brake fluid Owner’s manual Preheat Engine fault Workshop!
  • Page 37 Icon Warning lamp Lowline Midline Highline Warning text or warning Bulb failure e.g. Front left dipped beam defective! Constantly illuminated: Faulty bulb Flashing: HRC or AFS faulty Boot lid Pictogram e.g. Boot lid open! 1 x warning buzzer at speed of > 6 km/h Door open Pictogram Driver’s door open! Passenger door open!

  • Page 38: Convenience System Central Control Unit

    - Activation of the entry and start authorisation system. In the Passat 2006, the tyre pressure monitoring (via tyre pressure sensors and tyre pressure monitor aerials), immobilizer control unit J362 and entry and start authorisation control unit J518 functions are combined in the convenience system central control unit for the first time.

  • Page 39: Central Locking

    Central locking The convenience system central control unit controls all central locking functions. The central locking system includes the doors, the boot lid and the tank filler flap. There are three locking states. Unlocked The doors can be opened from the inside and outside. Locked The doors can only be opened from the inside by pulling the door handle once.

  • Page 40: Immobilizer Iv

    Immobilizer IV What does the immobilizer IV Central FAZIT database comprise? The immobilizer IV is not a separate control unit, The central FAZIT database at Volkswagen in but a function. Wolfsburg is a essential component of the It includes: immobilizer IV.
  • Page 41 Data Transfer Only an online query by the diagnostic tester All components involved in the immobilizer transfers the data safely, quickly and reliably have to be taught online. in the car. All car keys (including replacements) are A PIN query of the immobilizer components by already pre-coded at the factory for a specific fax or prior enabling of the components is not car and can only be taught for this vehicle.
  • Page 42 Onboard Power Supply Immobilizer components Convenience system central control unit Entry and start authorisation switch (E415) J393 The immobilizer function is integrated in the The entry and start authorisation switch contains convenience system central control unit. the reader coil for reading the transponder in the The control unit needs to be adjusted online after car key.
  • Page 43 Replacement of control units Control units that are involved in the “Immobilizer” function can only be replaced with an online connection to the FAZIT database. Convenience system central control unit Engine control unit J623 J393 Request data via online connection Request data via online connection Data transfer via VAS tester Data transfer via VAS tester...

  • Page 44: Start-Stop System

    Onboard Power Supply Start-Stop System Entry and start authorisation switch The entry and start authorisation switch is part of the driving authorisation system. It is used as a mechanical holder for the ignition key, converts the push movement of the ignition key into electrical signals and picks up the reader coil for electronic identification of the ignition key.

  • Page 45: Key Positions

    Key positions The various terminal voltages (terminal S, terminal 15) are activated and the start procedure is initiated by pushing the ignition key into the entry and start authorisation switch. S340_041 Switch positions The following switch positions can be set by pushing the ignition key: S contact on S340_045...

  • Page 46: Electronic Steering Column Lock Control Unit

    Onboard Power Supply Electronic Steering Column Lock Control Unit Control unit The electronic steering column lock is supplied with power by the convenience central control unit J393. Locking and unlocking as well as diagnosis is controlled with the convenience system central control unit via a serial data bus connection.
  • Page 47 Functional Diagram J527 J386 J519 J393 J285 J533 E415 J764 J623 J104 S340_048 Legend E415 Entry and start authorisation switch CAN data bus J104 ABS control unit Output signal J285 Control unit with display in dash panel insert J386 Driver door control unit Input signal J393 Convenience system central control unit J519 Onboard supply control unit...

  • Page 48: Convenience And Safety Electronics

    Convenience and safety electronics Cornering Light System (Advanced Frontlighting System) A cornering light system is optionally available for the Passat 2006. Dynamic cornering lights The dynamic cornering lights are adjusted to the steering angle during cornering and therefore guarantee optimum road illumination in all driving situations.
  • Page 49 Dynamic cornering light operation The dipped beam bulb module is swivelled horizontally by an integrated electric motor. Swivelling angle 15 ° The swivelling angle is approx. 15 degrees for the outside headlight and approx. 7.5 degrees for the 7.5 ° inside headlight in the curve.

  • Page 50: Customisation

    Convenience and safety electronics Customisation Customisation options allow customers to make The system is operated using the lever on the their own settings for convenience and steering wheel and the menus are selected using infotainment functions. the display in the dash panel insert Y24. The settings you select are stored in the control The specific settings for the different equipment unit that is responsible for control of the...
  • Page 51 For example: Menu guide Lights & Vision Coming Home Leaving Home Footwell light Lane change flash Wipers Factory setting Back Lane change flash Off Lane change flash on Back Back Lane change flash on Lane change flash off Back Back Lane change flash off Short press of button Long press of button...

  • Page 52: Parking Aid

    Convenience and Safety Electronics Parking Aid The parking aid supports the driver when manoeuvring and parking. It is based on the familiar 8-channel ultrasound technology. Parking aid control unit J446 The parking aid control unit J446 is located in the boot at the rear right.
  • Page 53 Parking aid sender The senders are mounted in the rear and front bumpers as well as the radiator grille. Signal flow diagram J285 Front Rear G252 G206 J217 J345 E266 G253 G205 J533 J104 J519 G204 G254 J446 G255 G203 Terminal 30 Terminal 15 S340_057...

  • Page 54: Transformer

    Convenience and Safety Electronics Transformer The Passat 2006 can be ordered with an optional 230 V/50 Hz electrical socket. A transformer has been installed in the car to produce the alternating voltage. It is permanently connected to the socket. This unit is located in the centre console in place of the cupholder.
  • Page 55 The socket is only powered when the engine is running (terminal 61). Except for the signal cable from the onboard power supply control unit, the Child protection transformer is connected to the onboard power micro switch supply control unit with a voltage supply (terminal 30) and an earth point.

  • Page 56: Service

    Service Wiper Adapter Systems Two new adapter systems are used for the wipers on the Passat 2006 called the side-lock and top-lock systems. Both systems allow you to replace the wiper blades in the parked position and ensure a more stable connection to the wiper arm.
  • Page 57 Washer Fluid Hose The Passat 2006 features an improved connector system for the washer fluid hose. Release Washer fluid hose connector Lock S340_076 Please refer to the ELSA electronic service information system for specific instructions on replacing wiper blades and separating the connectors.

  • Page 58: Test Yourself

    Test Yourself What is the maximum appliance output that can be connected constantly to the 230 V socket? a) 100 W b) 150 W c) 300 W d) 150 W, but only for 2 minutes Which functions are not integrated in the new convenience system central control unit? a) Immobilizer b) Tyre pressure monitoring c) Central locking...
  • Page 59 In the boot d) In the driver’s door, next to the window switches How many sensors does the Passat 2006 parking aid system have? a) 4 sensors, just at the rear b) 6 sensors at the front, 6 sensors at the rear...
  • Page 60 © VOLKSWAGEN AG, Wolfsburg All rights and rights to make technical alterations reserved. 000.2811.55.20 Technical status 02/2005 Volkswagen AG Service Training VK-21 Brieffach 1995 38436 Wolfsburg This paper was manufactured from pulp that was bleached without the use of chlorine.

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