Question about 2000 Volkswagen Beetle
Posted by Anonymous on
If you haven't replaced your water pump, chances are it could be the original part (OEM). This use a composite material impeller similar to hard plastic. They are prone to cracking at the shaft connection for the pulley and doesn't spin with the engine. Replace it with an aftermarket part which have metal impellers. I'd advice to invest on replacing your timing belt at this time because the water pump is behind the belt. Also keep in mind to use G12 only coolant (VW red coolant), these are phosphate free keeping the system cleaner. Your A/C when switched on automatically activates the fan to lower engine temp when the compressor adds extra loads to the engine.
Posted on Jul 04, 2010
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Posted on Jan 02, 2017
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A/C refrigerant pressure exceeds 1 310 kPa (190 psi).
After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140?°C (284?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.
The BCM and PCM/ECM command High Speed Fans on under the following conditions:
Engine coolant temperature reaches 110?°C (230?°F).
A/C refrigerant pressure exceeds 1 655 kPa (240 psi).
When certain DTCs set.
The three relays are located in the under hood fuse / relay box ! You need to have it checked for DTC'S -diagnostic trouble codes ! An you need a GM Tech 2 scan tool !
This diagnostic procedure supports the following DTCs:
DTC P0480 Cooling Fan 1 Relay Control Circuit
DTC P0481 Cooling Fan 2 and 3 or S/P Relay Control Circuit
DTC P0691 Cooling Fan 1 Relay Control Circuit Low Voltage
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DTC P0694 Cooling Fan 2 and 3 or S/P Relay Control Circuit High Voltage
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