Check the operation of the additional pump, as well as turn on the fan after the engine is stopped, in the following order:
Attention! The ignition must be switched off when performing a functional test of the auxiliary pump.
Pic. 196. Plug block (shown by arrow), which should be disconnected when checking the operation of the pump to cool the engine after it has stopped
- disconnect the 4-pin connector (pic. 196) temperature sensor for turning on the fan from the thermostat housing;
Pic. 197. Checking the temperature sensor to turn on the cooling fan after stopping the engine and the water pump: «1», «2», «3» and «4» - contacts
- connect the contacts with a piece of wire «1» and «3» (brown-red cable and brown-yellow cable) (pic. 197);
- at the same time, the cooling system fan and the coolant circulation pump should start working;
- if the fan and the circulation pump do not work, then there are other problems that should be detected at the Volkswagen workshop using the appropriate measuring equipment.
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