Question:
on an '91 acura legend (coupe), the cooling fans are not going into "high" speed. yes, i did say "high" speed for those that say there isn't such a thing. well, there is. everything assoc. with the cooling system has been changed. they come on but not in "high" speed. and b'cause of this the temp gauge fluctuates, causing veh. to run hot. don't worry, have no leaks, no blown heads (u can't drive a car from miami to atl, ga on leaks or blown heads - once it's hot, it's done. just to let u knw the engine's fine). there's something causing resistance, in keeping the fans from high speed, they just stay in low speed (not fast enuff to keep radiator/ engine cool). would welcome any helpful advice on what problem could possibly be, to correct it asap. particularly, n e 1 who is an legend owner who i'm sure has xperienced & truly knows what i'm speaking of. thx.
Answers:
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Check your secondary relay sensor switch.I'm not sure about the Legend, but I know the fan motors on my Land Rover are controlled entirely by the computer (there's no hard switch that turns them on & off - simmilar to the fan on a laptop computer). I would suggest a good import shop - someone that specializes in Hondas.
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Have the car computor scaned by a qualified a service centre . Sounds like a sensor control or problem in the computor. Sometimes reprograming that part of the computor helps also.On a gm pickup the brake peddle to the Flore. put new master cylinder on?
Before taking it to a professional repair facility there are a couple of checks that you can do for very likely causes. The first is to check fuse number 47, which is the one for the high speed control circuit. If this fuse is okay then I would get the vehicle warmed up to 194 degrees fahrenheit (which is when the high speed kicks in), and then try switching the condenser fan relay with the radiator fan sub relay. If they go to high speed now, you know that the relay is faulty. If not, then I would recommend a repair facility because the instructions get pretty technical from here. It is also important to know when the temperature is 194 (from the powertrain control module's perception) in order to do this testing. At my facility I would monitor this in the datastream on a scanner. A poor man's way might be to put something on the front of the hood to block air flow and then rev the engine to around 2,000 RPM and have someone in the car monitoring the temp gauge very closely. When they say the temp gauge is higher than normal but not quite in danger zone, then quickly do the testing because this should be hot enough. I must stress that it is very important to not go into the red so if it climbs, quickly remove the blanket, pour water on the radiator and put the engine speed back to idle immediately. I hope that this info helps. If it needs to go to a repair facility, I recommend finding a Blue Seal rated facility on ASE.com, which is an elite certification given to only 3-4% of all shops in the nation.More Questions & Answers ...
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