Audi A4 B5 1998 2000 Front Radiator Cooling Fanођ Radiator fan control unit. hey audiworld peeps. i have a 1998 audi a4 1.8 t quattro tip. i'm going to change my radiator fan control unit. the problem is i have no clue where it is on my model. i've seen it on a a4 2.8 v6 and a s4, but not my model. if anyone knows where it is or has any tips on how to change it, i would really appreciate it. 99.5 b5 a4 1.8tq troubleshooting ac, radiator fan & coolant leak. hi audiworlders, my 99.5 a4 1.8t just rolled over 100k recently and some issues are starting to creep up after 15 years of mostly reliable service. the latest one is that i recently overheated a couple of nights ago. two days prior i saw the coolant temperature go past the.
Audi A4 B5 1998 2000 Front Radiator Cooling Fanођ You should be able to conduct an output test with the ecm (key on, engine off). the fan should 'ramp up' from 0 to 100% and back to 0% speed. if the fan does not operate check the measuring value block (mvb) group 135, field 2 will show you in (%) the current fan output speed from the ecm. 1) the a c pressure switch. 2) the coolant thermoswitch on the lower radiator hose. i have a ton of experience with this circuit so ask away 🙂 modifieda4 2000 a4 1.8tqmsx k04'd 6.13 caps, 200whp. modifieda4 home of the caps 1.8t database. 11 03 2008 06:09 am #4. Where to check first? hello all audi heads. my b5 s4's radiator fan (on the pax side behind the radiator) is **** up. here is what i know: after the car is up to temp, i blocked the radiator with cardboard to get an actual high temp situation. the temp gage reads correctly, the ac fan in the front turns on about one dash beyond the middle mark. This is my diy writeup of how to install and electric fan on a b5 a4. a lot of people talk about the upgrade but i haven't yet seen a diy writeup. parts needed be cool 75083 a relay like this one temperature switch shorter pulley belt, recomended is the bando 5pk1195 copper wire, at least 16 gauge, even then i recommend running 2 lines optional: but highly recommended inline fuse or circuit.
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