Great intro :) Missing you and NY already mate. Had a real downer on me when I arrived back in the UK yesterday. Full steam ahead with my plan. See you in October and thanks again for the chance to work alongside you last week mate. You're awesome!
Had a similar issue on a Ford Edge only the fan wouldn't stay running after a body shop put an aftermarket fan on it. Found out only an OE fan would work properly on it.
Keith that fan sounds like it is ready launch itself into orbit. Bring Stevie back I think there is water in the trunk. Seems like he had a great time. Thanks for the video ❤️
How do you determine the comm wire is going wonky from the fan module? Could the wire have a fault along the way? Would I have been wasting my time by cutting the comm wire and scoping both sides of it?
Switching run forward and reverse by self the motor control unit is defective or the previously installed Fan is wrong. Many Mercedes Cars use simple motors with two wires and an externally mounted control unit Change fan run direction is a switching polarity - + on place minus and opposite - fan going to run in different directions.
Great video and nice showing the power of having a quality scan tool and scope seperate. Can watch the request and what is happening in the circuit at the same time.
It is always a matter of grace to post such videos but there was no explanation as to the root cause of the problem. Replacing the fan may be the correct remedy but what has caused this issue; in what manner has the fan failed and why? How does the car electronics control the fan? What aspect of the fan has failed?
Great video .love the euro diagnostics they dont publish much info. I had a Mercedes heater fan that was changing speed by it self .when it worked I compared the signals and notice the head unit wouldnt go flat line at 12 volts at high speed request to the speed controller used a test light connected to 12 volts touch the head unit control wire and high speed blower .dont worry about time I could watch your diagnostics for hours at a time😊😊😊
On the PWM system Voltage does not control the speed - voltage is fixed on the pols duty cycle to control the speed The cooling motor in this car has an internal module that controls the speed depending on PWM pols getting from ECU from the engine control unit ( Computer) Look at the tinny wire coming to the motor = it is a PWM line - in this case when speeding up no Pols = no longer control
Hey Keith, these cars also have an issue with the driver in the engine control unit causing the fan to be commanded on high. What's weird is that it seemed to be losing the pwm signal command and would be stuck at an odd voltage.
Does this fan get controlled through an electronic relay, AKA large transistor, like the older Jeep Grand Cherokees? The small current PWM from the ECU needs to be amplified by something.
Disconnecting connector the line is at rest .3volts and doesn't change. I meant to show that as well. I was rushing so that the customer could close shop. I had gotten there 15 minutes before closing 😔
@@NewLevelAuto I think when you unplug the control wire, the ECU stops output. I did a very similar car that ended up being a bad ECU. Had overheated the main processer and warped the board. Definitive diagnostic was tapping on the ECU made the PWM freek out. I guess this diagnosis was definitive by seeing the motor turn backwards. Just trying to improve my ability to separate systems to determine if it's an output issue or a "backfeed" issue. Perhaps a substituted load on the control wire?
On this one tapping the fan koeo caused the same results. New fan is in this morning and all is well . But I do appreciate that input for sure. Love the thought process you use !
I had the same problem in a05 c240 after i did change a bad noise ac compresor that didn’t vacuum the sistem so all I did put ac gauge then i see the pressure in around 500 and supposed to be around 250-300 then I drain some air from the red hose until came down around 250 after I did that the fan starts working normal
Great Steve impersonation lol. As always great video. Thanks for sharing. Question about the Farsight, I see it’s running a Pico. But I heard it’s also an Autologic Scanner? When I used to work on euros we had the blue box circa 2011. They’ve come out w/a lot of new equipment since then.
I've got an 06 c230. I let it run and idle for over an hour not going over 40-45mph, no problem. As soon as i got over 45, it immediately started blowing hot air and giving a code to take it in to shop. Also, the fan, i wanna say, would run loudly for a few minutes after i turned it off, prior to the overheating issue. Any thoughts?
In my case, 2004 MB E320, W210, is the fan request is always there from the front driver SAM module, which is AC signal. No communication with any SAMs, door modules, sunroof etc. Any suggestion please? Is CAN bus may cause that?
@williamscheer1481 you are right it was W211. And by the way I figured it out and it was the gateway module under the steering column. For some reason it was soaked with water and damaged. Thank you for your reply
I have a 350 4matic e-merc,model 2010. Fan was loud,it started itselves at freezing point minus 5 celsius. Only turn power on,not started the engine,then after 10 seconds fan was self started and full throttle. I bought a new blower and it fixed it all. Blower ecu was a mess. Not cars own ecu.In fan there is its own ecu-unit. 450 euros plus assembly......my first merc, w212 luxury limousine.and veeery exxpensive.Greetings from suomi finland.
Cool issue, thanks for showing! 👍 OEM every time or one should find out who actually makes the part before the manufacturer stamps their name on it : save a lot of money that way..
Great. Video . Is there any way to confirm that the ecm request is at the fan module ... I believe it is a pwm control. . As always these MB fan short internally .. and OEM are not cheap but they do last longer. ..
Great video thanks brother. I have never seen one want to run backwards unless you wanted it to or made it. Very interesting information. Keep up the great work see you in the next video thanks again brother
Right , you're new to the channel. I am a mobile tech whose job is to diagnose . The repair shops wouldn't want to pay me labor at 135 an hour to replace a cable that they will pay their employee 30 on .
@@NewLevelAuto just the way this thing is engineered(i use that term loosely) power and control means there is some type of electronics in the motor assy why would you put electronics in a hot spot???
Great intro :) Missing you and NY already mate. Had a real downer on me when I arrived back in the UK yesterday. Full steam ahead with my plan. See you in October and thanks again for the chance to work alongside you last week mate. You're awesome!
really considering moving here eh ..??
(eh -- is canadian speak ... when you're in NY, canuks aint far away .. :)
Had a similar issue on a Ford Edge only the fan wouldn't stay running after a body shop put an aftermarket fan on it. Found out only an OE fan would work properly on it.
Keith that fan sounds like it is ready launch itself into orbit. Bring Stevie back I think there is water in the trunk. Seems like he had a great time. Thanks for the video ❤️
Bring Stevie back I think there is water in the boot. Fixed it for ya!
How do you determine the comm wire is going wonky from the fan module? Could the wire have a fault along the way? Would I have been wasting my time by cutting the comm wire and scoping both sides of it?
Switching run forward and reverse by self the motor control unit is defective or the previously installed Fan is wrong.
Many Mercedes Cars use simple motors with two wires and an externally mounted control unit
Change fan run direction is a switching polarity - + on place minus and opposite - fan going to run in different directions.
That's not a problem its just on "Airplane mode"
So it was the fan motor? Not the relay?
Great video and nice showing the power of having a quality scan tool and scope seperate. Can watch the request and what is happening in the circuit at the same time.
Sounds like a good excuse for a new tool purchase Will.
It is always a matter of grace to post such videos but there was no explanation as to the root cause of the problem. Replacing the fan may be the correct remedy but what has caused this issue; in what manner has the fan failed and why? How does the car electronics control the fan? What aspect of the fan has failed?
Great video .love the euro diagnostics they dont publish much info. I had a Mercedes heater fan that was changing speed by it self .when it worked I compared the signals and notice the head unit wouldnt go flat line at 12 volts at high speed request to the speed controller used a test light connected to 12 volts touch the head unit control wire and high speed blower .dont worry about time I could watch your diagnostics for hours at a time😊😊😊
On the PWM system Voltage does not control the speed - voltage is fixed on the pols duty cycle to control the speed
The cooling motor in this car has an internal module that controls the speed depending on PWM pols getting from ECU from the engine control unit ( Computer)
Look at the tinny wire coming to the motor = it is a PWM line - in this case when speeding up no Pols = no longer control
Keith How was the fan running with no request. can you explain ?
Module. Fan module is bricked at the circuit-board level. Output driver.. maybe.. maybe a bad voltage sensing circuit. Aftermarket parts.. no bueno.
Hey Keith, these cars also have an issue with the driver in the engine control unit causing the fan to be commanded on high. What's weird is that it seemed to be losing the pwm signal command and would be stuck at an odd voltage.
How would you fix if this is the case
How was the fan running with no request. Internally shorted
Does this fan get controlled through an electronic relay, AKA large transistor, like the older Jeep Grand Cherokees?
The small current PWM from the ECU needs to be amplified by something.
Oh, I was thinking the video was on the short side. LoL 😂 Fun learning!
Did it only need a new OEM fan?
oem fan probably worth half the price of the whole car!
happy543210
A new oem fan for my 02 C-Class cost over $400, They’re expensive.
OEM means buying direct from the manufacturer without the Benz emblem. Shouldn't be horrid.
@@makemoneyonline8793 Not too bad?
Things were just starting to “heat up” when you pulled out the pico then they cooled off lol thanks for sharing sir!... jay
My 02 c230k ecm collected moisture the design allows it to not be able to dry /drain
Nice one Keith...
And you think 4 minutes video is too long...
Finished one yesterday.... 1h and 7m....🤦♂️
Thanks for sharing!
Break up the one hour into 27 parts!
@@NewLevelAuto
🤣🤣🤣🤣
It is about quality.... not quantity....😋
👍👍👍👍
How are you sure that the bad signal is not coming from the ECU?
Disconnecting connector the line is at rest .3volts and doesn't change. I meant to show that as well. I was rushing so that the customer could close shop. I had gotten there 15 minutes before closing 😔
@@NewLevelAuto I think when you unplug the control wire, the ECU stops output. I did a very similar car that ended up being a bad ECU. Had overheated the main processer and warped the board. Definitive diagnostic was tapping on the ECU made the PWM freek out. I guess this diagnosis was definitive by seeing the motor turn backwards. Just trying to improve my ability to separate systems to determine if it's an output issue or a "backfeed" issue. Perhaps a substituted load on the control wire?
On this one tapping the fan koeo caused the same results. New fan is in this morning and all is well . But I do appreciate that input for sure. Love the thought process you use !
My fan is turning on with no key in at full blast also radio stays on I'm guessing ecu ughhhh
Was it the ecu or did you get a new fan?@rjalexander440
2006 c350 fan runs full blast no key in. Also radio stays on. Alternator voltage says bad . Could it be ecu ??! Causing all
I had the same problem in a05 c240 after i did change a bad noise ac compresor that didn’t vacuum the sistem so all I did put ac gauge then i see the pressure in around 500 and supposed to be around 250-300 then I drain some air from the red hose until came down around 250 after I did that the fan starts working normal
Great Steve impersonation lol. As always great video. Thanks for sharing.
Question about the Farsight, I see it’s running a Pico. But I heard it’s also an Autologic Scanner?
When I used to work on euros we had the blue box circa 2011. They’ve come out w/a lot of new equipment since then.
I've got an 06 c230. I let it run and idle for over an hour not going over 40-45mph, no problem. As soon as i got over 45, it immediately started blowing hot air and giving a code to take it in to shop.
Also, the fan, i wanna say, would run loudly for a few minutes after i turned it off, prior to the overheating issue. Any thoughts?
Thank you Keith. Good job. I appreciate your videos.
In my case, 2004 MB E320, W210, is the fan request is always there from the front driver SAM module, which is AC signal. No communication with any SAMs, door modules, sunroof etc. Any suggestion please? Is CAN bus may cause that?
Your 2004 E320 is the newer W211 platform. W210 last year of production was 2003.
@williamscheer1481 you are right it was W211. And by the way I figured it out and it was the gateway module under the steering column.
For some reason it was soaked with water and damaged.
Thank you for your reply
Any words on that Farsight tool?
Ive replaced fan and motor and that didnt fix it
Keep up the German fish tank repair videos Keith.. Cheers
I have a 350 4matic e-merc,model 2010. Fan was loud,it started itselves at freezing point minus 5 celsius. Only turn power on,not started the engine,then after 10 seconds fan was self started and full throttle. I bought a new blower and it fixed it all. Blower ecu was a mess. Not cars own ecu.In fan there is its own ecu-unit. 450 euros plus assembly......my first merc, w212 luxury limousine.and veeery exxpensive.Greetings from suomi finland.
Cool issue, thanks for showing! 👍 OEM every time or one should find out who actually makes the part before the manufacturer stamps their name on it : save a lot of money that way..
OMG! you took almost 6 minutes LOL. awesome stuff there, it was worth it
Great find, thx for sharing.
so how do you fix it I've replaced fans relays what do you do to fix it?
replaced fans toos
Great. Video . Is there any way to confirm that the ecm request is at the fan module ... I believe it is a pwm control. . As always these MB fan short internally .. and OEM are not cheap but they do last longer. ..
you been there a couple of hrs before your edit ????
20 minutes
Keith it's 'Hello Faceboooook!' 🤣
Hey I tried 🤷♂️😁
Wow seemed like high def video as well as extremely useful, cheers.
Great video thanks brother. I have never seen one want to run backwards unless you wanted it to or made it. Very interesting information. Keep up the great work see you in the next video thanks again brother
No fish in that one? 😂
Throw some holy water on the fan you'll be fine. it's just possessed happens all the time
Gremlins, ghost in the machine, get out, get out while you still can! lol.
Thanks for the video.
I had the same problem with my W203. The battery was weak and failing. Change the battery and the problem is solved.
Great video. Very good information.
Your on fire today, I like it. Should we expect a third or fourth?
Either way, damn cool failure.
I have been watching you put out something like 8 videos today I was starting to get jealous
@@NewLevelAuto quantity not quality. I dont have any cool failures today, that cooling fan beats a wonky ECU any day.
I watched them all and really enjoyed them.
@@NewLevelAuto I appreciate that.
Please show it is fixed
That's 3 years ago at another shop I diagnosed for. Sorry
That was a great capture.
THE PROBLEM IS COMPUTERS , COSTING ONE OR TWO THOUSAND DOLLARS TO FIX, TODAYS INSANITY !!
Also hard starting
Very cool bud 👍
thanks for sharing.
soundedjust likesteve at the beginning!
Great stuff thanks
Get to the point already with this long video lol
2007 Mercedes Helicopter
Reeeeeeeeeverse polarity
great video.
It would of been more helpful if u showed how to fix it instead saying " look look the fan the fan its its going look look", smh
Right , you're new to the channel. I am a mobile tech whose job is to diagnose . The repair shops wouldn't want to pay me labor at 135 an hour to replace a cable that they will pay their employee 30 on .
First guess, comm issue
Dang it I'm so used to you diagnosing comm issues 😂
Shit Chinese aftermarket parts
Yeah another video
Joe no PWM pols fan is going to run on max speed
Speed only controlled by PWM pols - duty cycle low low speed - duty cycle hi-speed hi
And all YOU did was jibber jabber here. Learned absolutely nothing
Sorry you weren't able to learn anything. Hope you found your answers elsewhere. Have a beautiful day!
wierd
Name calling? 🙄☝️
.
.
🤣
@@NewLevelAuto just the way this thing is engineered(i use that term loosely) power and control means there is some type of electronics in the motor assy why would you put electronics in a hot spot???
First