Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Fans continually running
Hi all Have searched the forum for an answer but would just like to confirm something, Yes my fans are permanently on when ign is on have gone through and checked everything and it seems that I have power comming from pin 10 of the a/c amplifier, should this be getting an earth at this point?
|
Gatesys SW20
Supporter
- Total Posts : 1106
- Scores: 22
- Reward points: 1110
- Joined: 2012/11/06 19:28:18
- Status: offline
Re: Fans continually running
2013/08/21 18:34:43
(permalink)
Have you checked your thermo seitch Plugs into the passenger side if the radiator if that's faulty or not connected it will run all the time
|
Reddtarga
MR2 Deity
- Total Posts : 2175
- Scores: 249
- Reward points: 5547
- Joined: 2011/04/07 19:51:15
- Location: Vic Australia
- Status: offline
Re: Fans continually running
2013/08/21 19:04:56
(permalink)
Gatesys SW20 Have you checked your thermo seitch Plugs into the passenger side if the radiator if that's faulty or not connected it will run all the time
Gatesy, do you mean driver's side bottom of the radiator???
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/21 19:13:49
(permalink)
Stuck my head under there quickly but couldn't see any sensor, does anyone have a pic if it? Have bridged all other sensors on the water kneel and ac pressure sensor in the fronk but No change, the problem I have found is power to pin 1,2 and 3 of the number 1 cooling fan relay and I suspect the same would be the case for relay 2 as they share the same "earth" on the coil side of the relays which in the wiring diagram I have goes to the ac pressure switch and then to pin 10 of the a/c amplifier
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/21 19:15:18
(permalink)
http://www.mr2.com/forums/mk-2-mr2-sw20/Toyota-MR2-23801-fan-always-running.html
The wiring diagram I am using is 3/4 down the page for those playing at home
|
Gatesys SW20
Supporter
- Total Posts : 1106
- Scores: 22
- Reward points: 1110
- Joined: 2012/11/06 19:28:18
- Status: offline
Re: Fans continually running
2013/08/22 07:02:05
(permalink)
redtarga. yeah sorry my bad,
yeah there should be a sensor in your radiator, crawl under the car and its on the insed of the radiator so you have to be looking at the back of the rad, sand youll see a sensor with a round plug i think going to it, mine was unplugged due to the bad bleeding of my system, they will always run also if you have incorrectly bled the cooling system, as it will trap a pocket of air, stat with small stuff, check the sensor is plugged in and good, then re bleed system corrrectly!
then go from there, :)
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/22 07:52:06
(permalink)
Ok will check this afternoon, thanks all for the info
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/23 16:39:08
(permalink)
Finally got around to checking the sensor in the radiator, bridged it out and fans still running, so back to terminal 10 on the ac amplifier, what I did was unplug the ac switch and then earth the wire comming from the relay to it cause the fan relays to ground, is this an indication of the amplifier transistors fried?
|
MIDN1T3
MR2 Aficionado
- Total Posts : 345
- Scores: 11
- Reward points: 3717
- Joined: 2011/04/07 19:51:15
- Location: Darwin NT Australia
- Status: offline
Re: Fans continually running
2013/08/23 18:05:38
(permalink)
Not sure about your above question but i had the same issue -fans running all the time - and it turned out to be a faulty amplifier.
1990 SW20 MR2 N/A with 1994 Gen 3 GTS 3S-GTE swap.
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/23 18:16:24
(permalink)
Yeah sorry about that, just used to having all the info, basically the coil side of fan relay 2 and 3 get ignition power and then go to the ac pressure switch and then to pin 10 of the ac amplifier which by rights should be earthed by the ac amplifier to turn the fans off
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/08/27 17:40:39
(permalink)
|
GT-FourRC
MR2 Enthusiast
- Total Posts : 13
- Scores: 0
- Reward points: 1778
- Joined: 2011/04/07 19:51:15
- Status: offline
Re: Fans continually running
2013/09/02 22:26:35
(permalink)
Any update? I have the same issue.. been like this for ages.. thanks
|
Mrtsu
MR2 Enthusiast
- Total Posts : 29
- Scores: 1
- Reward points: 4
- Joined: 2013/08/19 18:06:37
- Status: offline
Re: Fans continually running
2013/09/02 22:59:35
(permalink)
Nope I'm going to order 1 and check if it fixes it will keep you posted
|
Cruiser97_80
MR2 Enthusiast
- Total Posts : 118
- Scores: 0
- Reward points: 5693
- Joined: 2011/04/07 19:51:15
- Location: Tas Australia
- Status: offline
Re: Fans continually running
2013/09/04 01:30:24
(permalink)
A/C pressure switch in the frunk near the fire wall (l/h side) will cause the fans to run all the time, if it's disconnected or faulty. I had this problem after removing all my a/c stuff. I had to bridge the connector that plugged into the a/c pressure switch to fix it.
1991 SW20 GT 2007 KUN26 SR5 2008 GSU45 KX-S 2008 VDJ200 SAHARA
|
twomr2`s
Supporter
- Total Posts : 176
- Scores: 46
- Reward points: 5893
- Joined: 2012/01/25 01:53:29
- Location: hillarys,WA
- Status: offline
Re: Fans continually running
2013/09/04 02:58:42
(permalink)
not sure what year,but this might help system outline added 4/9
post edited by twomr2`s - 2013/09/04 22:05:20
|