Question about 2000 Honda Valkyrie Interstate

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Rad fan not working - 2000 Honda Valkyrie Interstate

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You need a new temp sensor on rad ,...befor you do that tho ,test the fan by shorting it ..connect it up to a 12 volt battery ..if it spins its the sensor if not its the fan

Posted on Aug 14, 2013

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Posted on Jan 02, 2017

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Fans not turning on and replaced the coolant temp sensor? Coolant in reserve but not in radiator?


why do you have ? on facts? odd that.
my guess replaced ECT ! not ?
my guess, doing so , now engine is full of air, and not fails.
as all do.
front RAD cooling FANS, right? (not heater blower )
it don't work like you think, ? huh?
what does" not in Rad "mean? with ? marks?

means you trust the silly side tank and not look in rad? fail you will.
when doing cooling service, learn read a book first.
read how to fill and burp your engine, Just like feeding a baby it is.
is engine overheating?
did it , has it, or ? , what started this saga, tell a full story?
and WIN !
Facts: on this system.
the fans are controlled by the computer brain, under a complex set rules now. it's not some mindless switch like days of old.
sorry!
ill now answer for USA 03, how ours work,
ONLY!
ours has one fan., (not fans)
ours has a 3 speed fan (at rad back side.)
and has rules to run all 3 speeds, via 3 relays
the PCM/ECU decides this, based on if A/C is on or off.
and a complex set of rules (uses the ECT for this magic)
Fact 2: ECT will not work with air pockets !!!!
The PCM even turns on and turn off are not same temp!!!
Rules:
1: Rad must be filled of AF/ 50% antifreeze cold, to the top neck of RAD filler.
2: rad and engine burped of all air pockets, ask it's same on all cars.
3: the ECT must work, right, if air pockets there, it CANT work.
4: park car, idle until the minimum engine time is reached parked.
about 180F, but all cars overheat if parked, idling and fan stays dead.
fan is off , and at some point, the fan goes to low speed.

this varies by engine option, but is around 225F. (stage1)
THE FSM covers these checks, and rules, and temps. for all 3 stages of fan speed.
scan the pcm yet>?
got P0128 DTC? or others, for temperatures wrong,
not scanning is a big mistake on all modern cars.
big time!
yes, rad must be full parked cold, yes, yes, yes...
side expansion tanks do fail. for many reasons. ask.

a 2.0L engine. only, here. 7.4quarts cooling cap.
here is ours. usa fan. a 4 wire fan it is....
the ecu controls it using SOFTWARE, (firm-ware in truth)
26098393-rlcj0qgtvzvpudyok3p1nj5o-4-0.jpg do not drive car until all air is burped out of engine and rad.
DO NOT!
in fact run it idling to hot. 180f. ( too hot to touch long)
, kill engine with key.
let cool, to luke warm, or cold.
check rad level. (sure its low)
top it off, cap it,
repeat 3 times, before driving or if it holds levels.

Feb 17, 2016 | 2003 Suzuki Aerio

1 Answer

My car has 3 relays labeled rad fan 1, rad fan 2, and rad fan 3. When I took the 3 relays out and supplied 12v to them, rad fan 1 did not work. Do I just replace this or could it be something else?


When you apply power to rad fan 1 relay, is there power at the fan? If so, then indeed it's the fan, but until you check it, it could also be the wire...

May 28, 2015 | Cars & Trucks

1 Answer

When talking coolant fans for 1993 Subaru legacy what does Rad and Con mean?


Many cars have two fans on the radiator. The rad fan is for cooling when coolant temperature exceeds a set amount. The computer will turn on the fan by activating the coolant fan relay, which sends power to the fan. The other fan is for the air conditioner. Usually it will always turn on when the a/c is used, for additional cooling of the coolant. Usually the main fan or rad fan is on the driver's side.

Aug 21, 2014 | Cars & Trucks

1 Answer

2003 Toyota Hiace 5L Diesel overheat problems resolution


cause of engine overheating is either the rad fan not working well or luck of circulation of coolant through the engine, if rad fan is working well then might be your radiator {rusty,dirt or clog rad core or leak} make sure your rad cap and all hose and clamp is in good condition as well not preventing any air getting in the system or escaping coolant check also or replace the thermostat might be defective

Jul 18, 2014 | Toyota HiAce Cars & Trucks

1 Answer

I dont think my fan is working


there is a fuse for every load on the car, or car will catch fire. sooner or later......
the other fact is , many fuses are shared. some have 15 loads. (park)
think fan is working, ?
which one.?
1: cab heater
2: A/C condenser fan (extreme front of car)
3: the RAD fans, (see behind RAD)

tell fan? and I can tell which fuse.
the glove box guide , has a fuse page. lost that?

my guess, ? is the fan is OUT side the drivers CAB
"think" tell me its fan 2 or 3 above.
the tests for those fans is in the FSM.

the A/C fan turns on if A/C or defrost is selected. unless its
N.Pole weather. (it has logic that cuts this fan , under some wild conditions (unstated by you) what country? what latitude?.

the RAD fan, comes on , if you. (location not stated so, wild guess...)
1: drive 20miles
2: park and idle
3: as coolant passes 200F, near 230F, the rad fans come on
this is because the RAD is near useless , parked. (no air flow)

The FSM covers these tests.
or alldata.com

RAD = engine coolant Radiator.

Dec 03, 2013 | 2004 Jeep Liberty

1 Answer

Cooling fan not working


there are up to 4 fans, in cars. varies by years, and options.
heater /cooling fan in dash. (cab fan)
front leading edge A/C condenser fan
and up to 2 engine RAD fans.

are all dead?
does car have working A/C?

cooling for engine or occupants?

if you got to alldata.com the drawing is there, and how the logic works.
cars with low hoods, tend to have 2 RAD fans, (long skinny rad)
im too lazy to look it up ,until you state exact fan.

Nov 02, 2013 | 1996 Honda Accord

1 Answer

Cant find the wire to wire up the electric fan


heater fan,
RAD fan?
what?
the tracker has mech. only rad fan.
you can fix that. easy
or buy a new electric fan (expensive) and a more expensive thermoswitch that must connect to a rad hoses, not so easy to do. (ask)
the latter is all custom work, you up for that?

Feb 22, 2013 | Geo Tracker Cars & Trucks

1 Answer

Radiator fan not turning on time


Check the rad fan fuse or the relay under the hood.
Is the temp going too high? Check and make sure you are not low on rad fluid (engine cool). An air pocket where the fan temp sensor on the rad is located will not activate the sensor.

Failing that, check the rad temp sensor which activates the fan. If this sensor does not close at high temp...the fan won't work.

Aug 17, 2009 | 2001 Hyundai Santa Fe

1 Answer

Rad fan makes car shake 2003 sunfire


I would check the radiator fan in the car for looseness. If the fan wobbles or moves , Then change out the radiator fan. The radiator fan and motor come as one piece. There is a fan relay also should be replaced.
When turning the key only half way to make the dash fan work, indicates that the dash fan is okay.
The dash fan may make a whining or high pitch noise when engage. Then I would change it out because an internal bearing to the fan is going out.

Good luck

Mar 18, 2009 | 2003 Pontiac Sunfire

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