Onboard Power Supply - VolksPage

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Onboard Power SupplyRelay Carriers and Fuse BoxesLocationsThe relay carrier and the onboard power supplycontrol unit are under the left-hand side of thedash panel.Relay carrierThe relays connected to the relay carrier dependon the vehicle version and the equipment.On vehicles with heated seats, the circuitbreakers for the heating elements (thermal fuses)are also mounted on the relay carrier.S340 008Relay carrier on onboard power supplycontrol unitThere is an additional relay carrier on theonboard power supply control unit.S340 00920

Left-hand fuse boxThe fuse box is on the left-hand side of the dashpanel behind the cover.S340 013Right-hand fuse boxThe fuse box is on the right-hand side of the dashpanel behind the cover.S340 014Please refer to the ELSA electronic service information systemfor the current assignment of the fuses.21

Onboard Power SupplyOnboard Power Supply Control Unit J519LocationThe onboard power supply control unit is on theleft underneath the dash panel and forms a unitwith the relay carrier.S340 009VersionsThe Passat is equipped with two different versionsof the onboard power supply control unit. High versionfor vehicles with fog lights and/or Bi-Xenonlights and customisation options. Medium versionfor all other vehicle variants.Fog lights can be retrofitted only if the medium version of the onboard power supply controlunit is also exchanged for the high versions.22

TasksThe onboard power supply control unit switches and controls the following functions: Outside light control with bulb monitoringThe blown bulb is indicated by thecorresponding warning light or as a text in thedash panel insert. Front windscreen wiperThe CAN data bus signals are forwarded fromthe onboard power supply control unit to thewiper motor control unit Convenience lights with Rear windscreen wipersWhen you select reverse gear, the rearwindscreen wiper is switched on (estate only). Windscreen and rear window washer pump Turn signal control Electrical load managementSwitch-off under 11.8 V, as in Touran. Outside light control Heated rear windscreen Heated front windscreen Terminal controlThe onboard power supply control unitcontrols terminal 75x via the X-contact reliefrelay. Terminal 15 is controlled via the relay forvoltage supply terminal 15 in the electronicsbox. Terminal 50 is controlled via the relay forvoltage supply terminal 50 in the electronicsbox.Coming HomeAfter the vehicle doors are closed, the areasurrounding the vehicle is illuminated by alighting system on the vehicle.Leaving HomeThe area surrounding the vehicle will beilluminated by a lighting system when the caris unlocked with the remote control.Dimmable instrument lightingGear selector lighting Interior light controlTerminal 30G, via which the interior lights aresupplied with power, is switched by theonboard power supply control unit.Fuel pump supplyWhen you open the driver’s door, the electricalfuel pump is supplied by the onboard powersupply control unit with voltage.After you start the engine, the voltage issupplied by the engine control unit.23

Onboard Power SupplyExterior LightsFront headlightsDesignThe shape of the headlights is no longer the classic double round design. “Large eyes” are formed bytubes around the dipped beam lights.The large square full-beam reflector improves the full-beam performance considerably compared withthe Passat 1997.H7 headlightsThe basic headlights use halogen technology. H7lights are used for both the dipped andfull-beam lights.A voltage stabilising system used by the onboardpower supply control unit increases the life of thebulbs.S340 015Xenon headlightsThe Passat 2006 can be ordered withoptional Bi-Xenon headlights with cornering lightfunction.S340 016Xenon headlights are run with high-voltages of several 10,000 volts. Contact with this voltagecan be fatal.Therefore make sure you follow the safety guidelines given in the ELSAelectronic service information system.24

Tail lightsDesignThe tail lights feature the double round light design. They are two-piece.Tail lights in side sectionThe tail light, brake lights and indicators useLEDs and are integrated in the side section.The advantages of LEDs over bulbs are fasterresponse times, better signal formation andgreater homogeneity of the illuminated areas.Tail lights in the boot lidThe rear fog light is on the left of the boot lid andthe reverse light is on the right.Normal bulbs are used here.S340 017Tail light andturn signalTail light andbrake signalRear fog lightThird brake lightA third brake light as well as the indicatorsmounted in the door mirrors compliment theheadlights and tail lights and provide other roadusers with additional visual signals.The third brake light at the top of the rearwindscreen as well as the indicators in the doormirrors use LED technology.Third brake lightS340 018The whole unit will need to bereplaced if individual LEDs are faulty.25

Onboard Power SupplyRotary light switchIn the midline and highline version of the onboard power supply control unit, the light switch is asemiconductor element. It is therefore only used for activation. The lights are controlled by the onboardpower supply control unit output stage.Rotary light switch without automaticheadlight controlThe light in the light switch is illuminated whenterminal 75 is switched active.S340 019Rotary light switch with automaticheadlight controlThe symbol for automatic headlights isilluminated red when the light switch is set to“automatic headlight control”.When the switch is in the “automatic headlightcontrol” position and the rain and light detectorsensor has detected night-time or darkness, thesymbol will be illuminated green.When the switch is in the “automatic headlightcontrol” position and the rain and light detectorsensor has detected day-time or light, the symbolwill be illuminated light green.S340 020You will find further information onuse of the rotary light switch and thewarning lights in the Passat 2006operating manual.26

Indicator functionsThe following indicator modes are available in the Passat 2006:-Hazard warning lightsCrash warning lightsEmergency stop warning lightsTurn signalsLane change flash- Central locking flashing- Anti-theft alarm flashingThe individual operating modes have different priorities. This allows a flash function to be activated eventhough another one is in use.Priority 1Priority 2Priority 3Hazard warning lightsCrash warning lightsEmergency stop warning lightsPriority 4Priority 5Turn signals, lane change flashAnti-theft alarm flash,central locking flashHazard warning lightsTurn signalsThe “hazard warning lights on” function is sentdirectly from the hazard warning light switch tothe onboard power supply control unit.This information is not related to the status ofterminal 15.This function is realised in the onboard powersupply control unit and by the steering columnelectronics control unit. It is activated with theturn signal switch.Lane change flashCrash warning lightsThe hazard warning lights are switched onautomatically when the airbag control unitrecognises a crash.Emergency stop warning lightsThe hazard warning lights are switched on in anemergency braking situation(deceleration 7 m/s2 longer than 700 ms) orwhen the ABS is active for more than twoseconds.This function needs to be activated in theonboard power supply control unit using aVAS tester.If the turn signal switch is pressed for less than1 second, the indicators will flash three times.Pressing the turn signal switch in the samedirection for less than one second will add threemore flashes.The function can be activated with thecustomisation options or the VAS tester.Anti-theft alarm and central lock flashThese flash functions are requested by theconvenience system central control unit from theonboard power supply control unit via the CANdata bus when the corresponding function isactive.27

Onboard Power SupplyExterior lights functional diagramS340 021LegendD1Immobilizer reading unitE1Light switchE2 Turn signal switchE3 Hazard warning light switchE4 Headlight dipper/flasher switchE7Fog light switchE18 Rear fog light switchE20 Switches and instruments illumination regulatorE22 Intermittent wiper switchE34 Rear wiper switchE38 Intermittent wiper regulatorE44 Washer pump switch(automatic wash/wipe andheadlight washer system)E102 Headlight range control regulatorE415 Entry and start authorisation switchFBrake light switchF4Reversing light switchF266 Bonnet contact switchJ285 Control unit with display in dash panel insertJ362 Immobilizer control unitJ386 Driver door control unitJ387 Front passenger door control unitJ393 Convenience system central control unitJ519 Onboard supply control unitJ527 Steering column electronics control unitJ533 Data bus diagnostic interfaceJ764 Electronic steering column lock control unit28K1K4K6K13K18K65K94K170L9L22L23L46L76L131Main beam warning lampSide light warning lampHazard warning light system warning lampRear fog light warning lampTrailer operation warning lampLeft turn signal warning lampRight turn signal warning lampBulb failure warning lampLight switch illumination bulbLeft fog light bulbRight fog light bulbRear fog light bulbButton illumination bulbExterior mirror turn signal bulb,driver’s sideL132 Exterior mirror turn signal bulb,front passenger sideM1 Left side light bulbM2 Right tail light bulbM3 Right side light bulbM4 Left tail light bulbM5 Front left turn signal bulbM6 Rear left turn signal bulbM7 Front right turn signal bulbM8 Rear right turn signal bulbM9 Left brake light bulbM10 Right brake light bulb

S340 069M17 Right reversing light bulbM25 High level brake light bulbM29 Left dipped beam bulbM30 Left main beam bulbM31 Right dipped beam bulbM32 Right main beam bulbN360Steering column lock control elementN376 Ignition key withdrawal lock solenoidSFuseV48 Left headlight range control motorV49 Right headlight range control motorW31 Front left entry lightW32 Front right entry lightXNumber plate lightInput signalOutput signalPositiveEarthData bus29

Onboard Power SupplyAutomatic headlight controlDusk functionE415G397If light switch E1 is set to “automatic headlightcontrol”, the rain and light detector sensor G397automatically measures the light, e.g. whenentering a tunnel, and sends a signal to theonboard power supply control unit toautomatically switch on the driving lights.LegendE1Light switchE415 Entry and start authorisation switchG397 Rain and light sensorJ519 Onboard supply control unitL123 Left dipped beam bulbL124 Right dipped beam bulbL125 Left main beam bulbL126 Right main beam bulbE1J519L124L126L123L125S340 067Motorway functionThe motorway function switches the driving lightson when the car travels faster than 140 km/h forover 10 seconds. They are switched off againwhen the car travels slower than 65 km/h forlonger than 150 seconds. The function isactivated when the light switch is set to“automatic headlight control”.S340 022Rain functionThe rain function switches the driving lights onwhen the front wipers are active for longer than5 seconds and the light switch is set to “automaticheadlight control”. The driving lights are switchedoff again when there is no wipe procedure forlonger than 255 seconds.S340 02330

Vehicle lightsEmergency light modeIf the onboard power supply control unit is not capable of controlling the car lights due to a processormalfunction, an additional piece of hardware will take over the following lights:- Brake light- Side light- Dipped beamLight functionsThe following lights have additional functions:LightsAdditional functionsRear left and right brake lightsDimmed switch on as tail lightdimmed to 10%Rear left and right indicatorDimmed switch on as tail lightdimmed to 15%Light switch delayThe delay prevents the headlights being switched on briefly in the “automatic headlight control” positionwhen you quickly turn the switch from the “off” position to the “side lights” or “headlights” position.From/toOffAutomaticheadlight controlSide lightDriving lights“Light Sensor” signal“Light Sensor” signal“Light Sensor” signal“Light Sensor” signal“Lights on” “Lights off” “Lights on” “Lights off” “Lights on”(ms)(ms)(ms)(ms)(ms)500Off0Automaticheadlight control00Side light005000Driving lights0000“Lights off” “Lights on”(ms)(ms)“Lights off”(ms)00006000000060060031

Onboard Power SupplyData Bus Diagnostic Interface J533FunctionDue to the high proportion of networkedfunctions, large quantities of data have to betransferred.To ensure trouble-free data exchange, severaldata bus systems are required to exchange databetween each other.The data bus diagnostic interface links thesedata buses as a gateway interface and allowsdata transfer.LocationThe data bus diagnostic interface is on the leftunder the dash panel, above the acceleratorpedals.Master functionsThe data bus diagnostic interface J533 takes overthe master functions for terminal 15 run-on on thepowertrain CAN data bus as well as the controllogic for sleep and wake-up mode of the databus systems.S340 028For more information on the data bus diagnostic interface, seeSSP 307 “The Touran – Electrical System”.32

Transport modeThe car battery can be discharged during long transportation and standing times due to no-loadcurrents.Transport mode is activated to keep power consumption as low as possible. Control unit with display indash panel insert J285 indicates that transport mode is active.While transport mode is active, the car can be started and can be driven normally. The followingconvenience and infotainment consumers are deactivated: Central lockingWindow regulatorsRadioMultifunction steering wheelRemote controlInterior monitoring Receiver for auxiliary heater remote startInclination sensorSave LED in the doorInterior lights after 30 seconds activeSeat memoryAir conditioningDeactivate transport modeTransport mode can only be switched off with theVAS diagnostic testers via the vehicleself-diagnosis (collection services).It is automa

wiper motor control unit Rear windscreen wipers When you select reverse gear, the rear windscreen wiper is switched on (estate only). Windscreen and rear window washer pump Turn signal control Electrical load management Switch-off under 11.8 V, as in Touran. Outside light control Heated rear windscreen Heated front windscreen

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