Subaru Cooling Fan Diagnosis
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- Опубліковано 28 жов 2017
- Overview of Subaru EZ30D cooling fan diagnosis.
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----I assume no liability for property damage or injury incurred as a result of any of the information contained in this video. I recommend safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond my control, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not myself.---- - Авто та транспорт
Very informative had the same experience with my 1999 Subaru legacy. Didn't suspect the ECM. But after 2 hrs of diagnostic analysis it was the trigger. Keep up the great work. Thanks, EJ.
One of the most informative videos I've ever seen for Subaru. Thanks a bunch.
Thanks a bunch! I have an 08' Impreza that has the same issues (even with the previous owner adding the toggle switch!) I think it might be the ECM...back to the junkyard! Great video. Thank you!
Very helpful video .couple questions I connect the 2 green connectors to do the ECM test n my fans working but when i bypass the relay box not turn on i don't known what can i do
Great. I learned so much. Thank you.
very accurate. this confirms my ECU is bad, (2005 subaru legacy GT manual) fan is always on. a video relearning the new ECU would be fantastic.
Excellent video. Hope you had a cheap ECU kicking around. If the fan drivers were dead there's no telling what other circuitry was compromised. But it's also informative if you want to run a standalone fan controller based on your information.
Great video! It has helped quite a bit with my parents 2002 outback h6. I have a question for you. Checked both fuses and have power there. I checked resistance on all relays they are good. Jumped the fans and they both kick on. Connected the green plugs everything kicks on but the main fan. I checked the pin at the ECM for 12v and I have no power to it. Is there a plug that I can check to see why I do not have power to the ECM?
great video! I just had the radiator and the radiator fans both replaced on my 2017 outback 3.6r. The mechanic said that somehow the motors for the fans had fallen out of the fan blades - do you know how this might happen? That caused my car to overheat.
Also, after getting it fixed, only the passenger side fan runs when I have the AC on full blast and am idling. Is this normal? Does the driver's side fan turn on at a specific temperature or something? Thanks
Good silent movie! Makes people read and think. Thanks!
You are so good!! Only one hand on the clips? I still have trouble at times with both hands. Lol.
So when you jumped the circuit in the relay prongs.. If it didn't turn the fan on, what would be your next step? My 02 H4 2.5 is havong similar problems. Fan motors are good. No power to harness plugs for fans.
So those 2 green plugs put together and the fans turns on, does that mean the relay is good too or does it bypass that to make the fans work. When I turn on the ac the fans doesn't turn on. Please help..the only thing I did was changed thermostat and now the fan doesn't turn on. It worked before. Those relay was.kicking my butt to get it out so thats the only thing I didn't do yet
My 01 6cylinder outback same as yours in vid I’m guessing. Was overheating while it was running in park but the fan worked? Then it throwed the same code so wonder if that’s what I need new Ecm?
Excellent video! Question: Would it be a really bad idea to just wire the fans to run all the time?
Hey so what would be the bad part if the relay pin doesn’t click or have any power ? Please help
Mr Subaru. I need your help. I have a 2012 Forester and I was wondering if it's subfan should always stay running when I have the AC on. Because right now the AC is blowing hot air when parked and idling in particularly hot weather, and replacing the AC system hasn't fixed it.
Hello nice video 👍🏻 i have a 2005 subaru impreza the fan only work on high speed low speed fan not working.. the high speed work when the temperature goes high any idea about the problem?
Great content. Few quick questions - how does your snap on tool know the actual coolant temp if the sensor is faulty, isnt there only one? Also shouldn’t you have checked the relay to make sure it is operating correctly? Thanks.
he did check the relay by putting it into Diagnostic mode with the green connector.
Hey! Long time subscriber and I got a quick question for something that may interest you.
If I were to run only one fan; which one flows better and which fan plug would you use for correct ECM control?
I built a custom radiator setup that uses only one OEM fan (RH fan). With extra efficiencies engineered into this system, I am hoping to make up the loss of one fan. It's already all done going on the dyno next week.
Honestly not sure if they're different in terms of cfm of air moved.
Hi! Maybe stupid, but important to me question. Is the coolant temperature sensor the same as the fan temperature switch? Can't locate the switch on my 2010 Outback.
I have an issue with my sti that i cant seem to sort out its over heating after driving the car for about 32 miles. What ive done is replace thermostat with Subaru oem, and radiator caps. When i run the car with no thermostat the car does not over heat but when i out the thermostat back on it over heats.
I have the exact vehicle with that same code. Fans work. Heats up only while sitting running at idle then temp. goes back to normal as soon as I start driving. Always the same symptom. Codes cleared no cel. Any ideas? I'm thinking temp. switch??
Can you show the pin out test for a 2003 4cyl model
Can I ask a question about my 2005 forester rad fan runs on low all the time ?
Amazing. Thank for this. Question.... so is there a gasket leak as well then? Subscribed and liked btw.
+Ruben Espinoza yes, head gasket(s) blown. Car was overheated, boiled over, cracked the radiator with the previous owner.
hi Sir,
Just a quick question if you got the time, Why is it after changing coolant on a BRZ, the bottom rad hose will not get hot (it's pressurized though) ? Both fans work w A/C but the rad fan will not turn on past the halfway point. Bled the system several times already. Thanks for posting, looks like you are the one to ask.
Hi Mr. SUbaru, My 2011 Tribeca has been heating up, changed Fan unit,radiator leaked fixed and changed the Thermostat, still heating up. Head Gasket was changed 1 year ago. Any ideas what may be causing and what to do?
Awesome!! Thanks mate for a detailed explanation of the issue and a fix for the problem. BTW what scan tool did you use? Love your channel :)
Snap-on VERUS Pro.
@@MrSubaru1387 would it be a bad idea to just have the fans run all the time by hotwiring them?
its way cheaper than buying a new ecm
I noticed after my head gasket job a few months back there is always excess coolant in the overflow when the engine is hot. Is that normal? When the engine sits overnight it usually goes back down.
Was the cooling system over filled to begin with? Coolant expands when hot, it moves from the radiator into the reservoir. When the coolant cools, it contracts. The coolant in the reservoir flows back into the radiator. This movement in and out is normal, within the limits of fill on the reservoir. If excessive amounts of coolant are being pushed into the reservoir, you may have a bad radiator cap.
Seriously awesome video! I start as a Subaru line tech in a few days. I’m a little nervous as I know electrical diag. is my weak point. Definitely liked seeing how you checked the circuit. Is there a way to know if the car has the green d-check connectors?
+BAKWOODS KID as far as I know, all Subarus have the green test mode connectors. They're going to be under the dash. Usually they'll be taped to the harness, up and out of the way.
MrSubaru1387 I know I’ve seen some on the passenger side footwell. On different models. I’m not sure on the new models. Than again they seem to have a lot of infotainment issues. Appreciate the response.
im so happy you were able to get that vocal cord transplant ! :P
On my 99 Subaru Legacy outback , run self test fans work ; but when I start the vehicle and get on the road they don't turn on at all? Someone help
Thanks for the great. My 2011 outback cooling temp sensor goes up really high but the none of the cooling fans kick in. I monitor the engine coolant temp by an OBD reader. The cooling fans both kick in only when AC or defrosting is on. Do you think I have a bad radiator temp sensor? Cause the coolant temp sensor does seem to be working fine. Thank you very much.
Farhad, I'm having the same exact problem. Both fans will only turn on when the a/c is on. Otherwise, they will not turn on and the outback will overheat. Did you find a fix for this? Thanks a bunch!
@@oldtimer6528did you find a fix, I’m having the same problem
I assume go new OEM for an ECM if this is the issue? They're damn expensive for my Subaru Legacy 2012...
Just curious in the video you confirmed the head gasket are leaking did you replace those or just left it since the fans are running better?
Replaced the engine.
This is unrelated to fan diagnostics, and I'm hoping you could make a video about it in the future. Is there a common Subaru diagnostic procedure for P0440? It used to be accompanied with P1445 & P0420, but now it's just P0440. Car is stock NA 2000 Impreza RS at 110k miles.
+Rice Y
DTC P0440 EVAPORATIVE EMISSION CONTROL SYSTEM
MALFUNCTION
- DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault
- TROUBLE SYMPTOM:
- Gasoline smell
-POSSIBLE CAUSES:
(FAULTY OR LEAKING)
- FUEL FILLER CAP
- FUEL FILLER PIPE PACKING (SEAL)
- DRAIN VALVE OR VENT CONTROL SOLENOID VALVE
- PURGE CONTROL SOLENOID VALVE
- PRESSURE CONTROL SOLENOID VALVE
- EVAPORATIVE EMISSION CONTROL SYSTEM LINE
- CHARCOAL CANISTER
- FUEL TANK
Where did you find replacement ECM?
Great video! Couple of questions. First what did you see in the coolant that told you the HG was blown, was it the bubbles?
Second, I didn’t think you could just swap ECMs. Don’t they need to be flashed with the software the is specific to that VIN?
Thanks
+Robert F yes, the bubbles. Also used a hydrocarbon tester off camera to confirm. Nope, plug and play on most older Subaru ECMs.
What can/should be done about the blown HG
+Everett Stewart have the cylinder heads resurfaced, cleaned, checked for cracks/leaks, valve job performed. Install new head gasket. Enjoy another 150k+ miles of driving.
@@MrSubaru1387 what would the ballpark cost of that be?
Around $500, give or take.
I have the same problem with a subaru forester 2010 SOHC. The fan doesnt turn on with the switch only if I turn on the AC. I verify the Main Fan Relay and its Ok. But Still doesnt test the output of the ECU and Coolant temperature sensor.
I'm having the same exact problem. Both fans will only turn on when the a/c is on. Otherwise, they will not turn on and the outback will overheat. Did you find a fix for this?
Master fix.... 2011 Outback.. Is this going to be simalar. I m on the trail of the same thing possibly but the head gaskets are good. What a mess.
Weird sound coming from my 06 outback at idle anyway I can send you a video of it?
mrsubaru1387@gmail.com
Hi, I'm wondering how you could tell that the head gasket was leaking when looking at the coolant from the spill free funnel. Is it because it looks like there is black stuff coming up from the bottom of the funnel there?
The bubbling.
@@MrSubaru1387 Couldn't it also just be bubbling from there being air in the cooling system? How can you tell that it's from exhaust gases?
Surprising. How often do ECMs fail? And how much do they run?
+Michael N pretty rare incident. Cost, no clue. Pulled an ECM from one of my parts cars.
MrSubaru1387 I need to replace ECM on an 02 Forester. This makes the process seem plug and play. Is it possibly just that easy?
+Dave B yes. As long as you've corrected the issue that caused the first ECM to fail, that is, if it failed from an external source.
So I have an 01 LGT that was having fan operating issues (temp sensor malfunction I'm pretty sure). I recently changed out my timing, water pump, thermostat, & temp sensor and now my gauge pegs to as hot as it can read almost immediately after starting the car cold while reading temps off ECU using OBD II they seem normal. Until driving the car if I am not in stop and go traffic the temp seems to just rise and rise which it never did before all the work I did so I don't think head gaskets are donezo. Any advice? I've gone thru 3 temp sensors (broke one off in the crossover pipe so that is also new too). Thanks in advance!!!
Are the coolant temp sensors oem or aftermarket?
You won't like my answer lol. Aftermarket. Do they fail that often?
There's the issue. Put a Subaru oem sensor in it and you should be good.
Alright I'll go snag an oem one after work and try it out. What about how temps continue to rise if I drive the car without stopping frequently? It seems if I am in traffic temp gets regulated by fans finally, but if I keep driving for more than a couple min heat just rises and rises. Got to about 213 before I blasted heat and pulled over last time I drove it. I feel that I thoroughly bled the system when I did all the other work....
I'd start with the sensor. I think it's giving you inaccurate readings on the gauge.
Got a crazy question I had to hardwire my cooling fans and now I can't remember which way their supposed to blow it is a 2003 Subaru forester currently I have the fans facing blowing air from the engine compartment out through the front
They pull air from outside across the radiator.
@@MrSubaru1387 ty
How did you get passed the wrong Vin no start is it a new ecm or flashed some how I got one with water damage and has got me stumped
?? I just swapped ECMs. No coding, programing, etc required.
MrSubaru1387 im just not lucky I guess lol
What year?
MrSubaru1387 a 05 outback
Are the cooling fans suppose to come on and off ?
Yes
I have a very similar problem on my 2010 forester, except the fans come on intermittently and the car overheats, I have tried everything you did in this video including replacing the ecm, but the problem persists. they seem to work perfect when put in in diagnostic mode.
Must be an input issue. PCM turns on fans using the info it gets from the ECT (engine coolant temp) sensor.
That is what I thought initially but bought one of those obd2 scan tools, coolant sensor seems to be working correctly.
Do they come on with the a/c as they should?
Yes they work fine when you turn a/c on.
That's odd.. Have you checked all of the cooling fan relays?
I hope you can answer one question. I was reading the FSM and it said 203 F, fans turn on 70% and 213 F, fans are 100%. How can you confirm that? It's the 09 Legacy 3.0 FSM. Not sure if that matters. Test fuse works, both fans run with AC. Both fans turn on at 203 and off mid 190s. I don't want to blame the new OEM radiator. The ecm would change speed if true. Sorry to ask you but I don't think anyone else could answer.
Nevermind, the packing by the radiator cap is damp. I'll pressure test it.
Umm. Rad leak?
@@MrSubaru1387 Well I better figure out, lol. I contact the Subaru vendor for a invoice sale but doubt they can make it right. SOA part warranty says take to your dealer with invoice. I "rented" a pressure tester, gauge waay off. It's a slow slows leak or radiator cap is opening up. The whole coolant system is new. I ran it 30 min to throw fans on but wouldn't go above 197 under no load. Any way to diagnose a bad cap? Hope it stays cold next week from TN to NC.
I have been looking for something like that since I bought my legacy 2002 GX, p1480 main fan not working, but I am selling my car anyway and I have no money to spend on projects ☹️ that is so sad
+thesniperofcs oh no. 😔
Could this happen from resetting check engine light ? I reset a CEL ON 3.6L 08 Tribeca and heard a loud noise and now fans just won't work. @mrsubaru
No. Clearing a CEL won't cause the fans to stop working. What code(s) were on?
It was a p0420 I just had her reset it to be able to use cruise control reset it 5 mins later fans stop working. New radiator 12k miles ago. Out of town 3 states away :(
@@danielcarroll6010 yea, that shouldn't have done anything. Checked fuses and relays?
@@MrSubaru1387 now they are saying a radiator hose kind of popped off? But not enough to make a major leak but it killed vaccum and fluid started to almost boil why would that make the fans stop?
@@danielcarroll6010 it wouldn't.
Crazy question this is my 1st Subaru it's a 2003 automatic non Turbo is there anything I can do to help With acceleration for passing ? Is there a can tune that you would recommend.
No. Lol sorry.
@@MrSubaru1387 i didn't think that there was but thought id ask. My buddy said SUPERCHIP
You look like you know what you're doing. Why did my Subaru stop every 5 seconds when I fill with fuel?
so its that easy to tell if your head gasket is bad? shoot i will check mine every day if thats all you have to do
sounds like its low on plutonium to me. :)
What a pita to figure that one out, and the ecu says made in TN, not in Japan, maybe that's the problem lol
+Matt Thiele well, this was the short version. Electrical testing and diagnostics is pretty involved sometimes.
And btw I think this is the first time we've seen you lol, altough trough that screen. Someday we will see you talking over there, your channel has turned awesome since when you started it, we like it a lot, congrats!
NEED TO TALK WHEN DOING A VIDEO DONT JUST EXPECT PEOPLE TO READ BETWEEN THE LINES GOOD TEACHERS USE EVERY WAY TO TEACH
AND DONT NEED ALL THAT MUSIC TO MAKE A VIDEO SHARE YOUR KNOWLEDGE THATS ALL