Question about 2000 Volkswagen Passat 4Motion

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Change an alternator on a V reg Passat ( 2000 Reg)

Need to remove the offending Item and would like a step by step crib sheet to facilitate this I know its the alternator because the car is telling me in no uncertain terms.


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  • yadayada
    yadayada May 11, 2010




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Thanks I had'nt will avail myself of this as time permits

Posted on Oct 29, 2008


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017


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Does the ECM control the alternator charging amperage/voltage on a 2004 Suzuki aerio? New alternator only charges @12.5. Won't charge enough to keep ahead of necessary power draw.

Some vehicles are fitted with a smart charging system that is designed to prevent the alternator charging during acceleration to free a few horsepower to help.

My experience of these is very limited but there is an ECU that controls them and the battery, charging or ignition light using information from the engine management system.
The alternator generally has an extra plug with about four or five wires which when disconnected render the alternator a standard machine sensed type.

Japanese vehicles used separate voltage regulators longer than most types. You either need experience or a wiring diagram for good fault diagnosis but mostly it is unnecessary to check the charging current of an alternator which bears little significance unless being tested with a graduated load or adjustable carbon pile.

The current output of a healthy alternator is dependent on the terminal voltage of the battery which in turn is dependent on the electrical load placed upon it. Switching on the lights should lower the voltage and increase the alternator output. If the battery is particularly good the voltage won't fall very much and the current won't increase as much as expected...

Measuring the battery voltage with the engine running at about 2000/2500 rpm is sufficient for most purposes. With nothing switched on and a fully charged battery it should be around 14.5 volts and with everything switched on (lights, HRW, heater fan, etc.) a healthy alternator should continue to maintain a voltage above that of a healthy fully charged battery (13.2 volts).

If the voltage isn't maintained on load the charging system, probably the alternator, is faulty and should be independently tested.

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You will need to replace the camshaft position sensor. It is an easy job, just get the part, it may be a dealer item only, but you can check an auto parts store.

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Welcome to
in the location shown you will need a special oil sender socket.( you can buy at auto zone) and remove it and replace it. that simple. leedavidian_314.jpg
Thank you for Using Kind Regards, Lee Your FixYa Expert and Master Technician

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I need to bleed the coolant of a vw passat 2002 reg but i cant figure it out

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You will need to have a scan done of the OBD codes to be certain what is causing this problem. It is the cheapest and fastest method

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2 Answers

Voltage irregularity

Well that's ABSOLUTELY NOT TRUE, the voltage regulator is in the ALTERNATOR. This vehicle needs an alternator and that should take care of this problem. Good luck and thanks for using FIX YA

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my engine (VW 1.9 TDI 115 BHP)doesn t warm up.Can you help?

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