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...Technical Information Alternators with heavily oil-fouled vacuum pump Damage In the case of some vehicles with diesel engines, the vacuum required for the brake booster is created by a vacuum pump fitted to the alternator. A frequently-occurring problem is that these alternators are...

...Technical Information Alternator Damage due to short-circuit/polarity reversal Damage Damage due to short-circuits/polarity reversal on alternators can be recognized due to interrupted or unsoldered power diodes, an unsoldered stator winding and/or charred rectifier bodies....

...Technical Information Connector seal General information One frequently occurring problem is the rubber seal falling out unnoticed when the connector is pulled apart. This small rubber seal fulfils very important tasks that are necessary for the perfect operation of electrical/electro...

...Technical Information “Pasting-up” of starters Damage If a “pasting-up” of starters occurs, this may be noticed due to increased noise development and damaged starter pinions. In extreme cases, the motor ring gear may also be badly damaged. Causes The “pasting-up” occu...

...Technical Information Generator Diagnostics For fault diagnosis on generators consider the following principles: · Don't disconnect, fit or short circuit terminals when the engine is running and the generator working (voltage spikes lead to damage ). · Don't measure...

...Technical Information Noise emitted in the area of the vehicle auxiliaries drive system 1.9 TDI engines with tensioning arm (OE no.): 038 903 315 AE Models: Audi: A3 Ford: Galaxy Seat: Alhambra, Ibiza IV, Leon, Toledo II Skoda: Octavia VW: Bora, Golf IV, Multi...

...Technical Information Glow plugs General Diesel engines require an extra heat source to reach the necessary ignition temperature of the diesel fuel/air mixture when lower outside temperatures exist. This is the function of the pre-heater system and the use of Glow plug s as the...

...Technical Information Oil pressure switch General The oil pressure switch is installed in the oil circuit of the engine. It monitors the oil pressure and turns off or on a warning light or controls an oil pressure indicator.Function The oil pressure switch is normally closed.When the ignit...

...Technical Information Oil temperature sensor General Depending on the type of vehicle, oil temperature sensors may be installed in addition to oil pressure sensors in some vehicles. The oil temperature sensor sends its information to a separate instrument or to the ECU for moni...

...Technical Information Preheating relays General Preheating relays provide switching and control of glow plugs. Activation and operation duration are mostly influenced by the position of the ignition switch or activity of the door lock and a temperature sensor. Funct...



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