Thanks for featuring our Benz! Thanks for all your help Lou. For all you viewers and possible customers: Lou is a great mechanic. He is relentless in finding answers in auto issues. He treated us respectfully and was upfront, staying in touch and explaining things. I recommend Lou very much. Thanks, Dan
Use SIA Electronics for Mercedes ECU. They are awesome. Based outside of Chicago. They will completely rebuild the ECU for $220. 3 year warranty. Fixed everything on our CLS.
Hi, thanks for the great video on this topic. I've been suffering through the same problem on my 2007 CLS550 for over a year now! Can you share the contact info of the ECM vendor you used in New York who fixed the ECM?
Hi friend, we're you able to get the contact info for the ecm repair? If you still have it or know where to go could you let me know please? I have the same issue currently and the fan goes on full blast right as soon as the car turns on till its off
If you ever need to remove components like this again, invest in a hot air blower (cheap Chinese versions are fine). It will allow you to heat up all of the soldered legs at the same time. Flux will also make the job much easier
Another fix we have performed for fan run or no run. Installed a new circuit to control radiator cooling fan, thru the use of a manual switch in driver's dashboard. The customer has to turn on during operating of a/c, and city traffic. Saved the customer $$$. My favorite Mercedes-Benz, 126 chassis 300 SD turbo diesel, easy to diagnose and repair, all kinds of engines room, and built like tanks!
That intake flap code shouldn't be ignored. That year E-Class is notorious for the plastic linkage snapping, resulting in a intake flap that will not open. Will lead to other emission issues and possibly more electrical faults. That year also has a manufacturing install defect of electrical wiring in the trunk on the driver's side hinge, behind the plastic trim. The issue is the wires were zip tied to the hinge from the factory too tight. It results in the brown wire breaking resulting in the trunk release button inside not working as well as rear trunk brake light being inoperable as well. There was also an extended warranty placed on fuel pump and filter unit in those years. It fails resulting in a fuel smell inside the cabin. The Mercedes Benz dealer in Bloomfield Hills, Michigan refused to honor the warranty, even though headquarters verified it was covered. Apparently independently owned locations can do that. Stupid! They tried to charge over $2k to repair. Did it myself for under $200, wasn't that difficult. Unit is located under the rear seat. Good luck!
I am currently having this issue. But it’s only when the car is running. I took it to two Mechanic and they haven’t been helpful. Thanks for video guess I’ll be showing someone this video of what needs to be done.
Hi, thank you for all ur usefull videos. It means a lot to people that have to deal with dishonest dealerships and mechanics. I diagnosed a w204 c350 2012 with icarsoft and I get the following error message: P220101 The NOx sensor( cylinder BANK 1 ) has a malfuction. There is a general electrical fault. How is it possible to know which exact sensor (MB part number) I need to replace? Thank you
Funny, I'm a professional musician working on my c207 & my sister's w203 & its always awesome seeing professional mechanics, etc playing their own music in their vids! Also, never knew about early m272's having bad ECM's. That's slightly terrifying hahaha....I just had a 0521 paired w/ a hard cold start & same fan nonsense. Coolant temp sensor read a fault also & had one on hand so fingers crossed. My bank1 tumble flap sensor is undercurrent, so also praying I can just swap that before I check the front of the dreaded intake manifold for you know what. Thanks for what you do!
This may be the same thing with the 08 c300. The motor looks the same. I replaced the coolsnt temp sensor; IAT senor and thermostat those cides were showing. The fans before i changed everything would stay on cimtinuously or not be on at all.. im going to try and tap the ECU and test it. I replaced my 07 300 CPU with a new one from the Flagdhip one auto; i had to flash it with that onboard diagnodtic its not just going to plug and play.. Thanks for the info..
This was happening on a c class estate I recently bought I watched a few you tube videos and decided to start cheap and work up firstly I noticed the battery was brand new but looked very small and on looking closer found the battery had smaller CCA and lower ah than what was supposed to be on the car so luckily I had just bought a new battery for my s class which was obviously bigger CCA and ah I joined the positive and negative together in the boot and left overnight fitted the s class battery started the car with fingers crossed and no more fan on continuous from cold and no fan over run I have found over the years of Mercedes ownership if there is the slightest drop in battery voltage or performance it starts to play havoc with the electrical systems on the car hope this helps ps it won't solve everyone's problem but it solved mine
Can you re-authorize those 2007 and up ECUs with SDS or does it have to be a virgin unit? Another reason why swapping the EEPROM didn't work is because it looks like the donor ECU was not identical. I have found when doing work like this, if the ECU was made by a different subcontractor or even just a different year, the other chips on the module can be different and it doesn't know how to communicate with them. I always try to get the exact same part number and versioning.
Thank for this information your share. i need to ask you something i have 2011 Viano W639 when i drive the AC is perfect when i stop in traffic the coiling is so low i changed the AC compressor (Denso) and new condenser as well what you think from your work experience the issue? thanks for your time.
i just replaced my radiator a couple days ago. but once i turn the key on the fan went on full busted high speed. its killed my battery, so do you think its still the control module? the video was very helpful, but from what i seen and heard its looking and sounds like thats my problem. any feed back will be helpful.
@@josephdispensa1475 very important to get the alternator from the dealer or correct vendor as not all the alternators work properly in these cars. Also you have a battery draw most likely or just simply poor connections to the battery or alternator
I am having the same issue with my car. It started a year ago. At that time, I disconnected the battery and took to a shop. No issues until yesterday. I dis connected the battery overnight and this morning the fan turned on full speed. The car was cold and off. It hasn’t happened again. I need to get fixed. Your video was on point. Thank you so much.
perfect i watched your video in Iran. i wanted sent you a message in your website but i couldn't. please help me how i can connect with you, Thank you.
@@MasterTechLou because in Iran we have lots of filtering and i don't know why your website must be filter. how ever i open it with anti filter but i couldn't sent too you my comment.
90% of the time water is in the blower and resistor housing, its one piece/part from dealer. not sure if aftermarket sells individual but they wont work. Issue is common an a blower/resistor fixes it. dont take my word for it, do your diagnosis please. Lou
Im having the same problem with my 2019 c 300 mercedes benz. My fan comes on high speed and my ac is warm. Have you had any newer models with this problem? I'll have to invest in a diagnostic tool.
So to understand . I am no mechanic . The problem is on the computer ? Recently my computer was changed for a “new “ and this problem happened . So if it is on the computer I believe is on my guarantee . That is why my question
WHATS UP..GREAT VID!! I'M IN NYC WITH THE SAME PROBLEM W219 2007 CLS550. CAN U DIRECT ME TO GUY IN NY? NOBODY CAN TELL ME WHATS WRONG WITH THIS FAN.🤷♂️
Hello! So what's the name of the shop in NY that was able to correctly perform the VIN swap? Am I to understand that swapping the chips was unnecessary given that the guy in NY transferred all the data? My 02 C230, battery died recently...when I recharged it, and reconnected, fan is running constantly with the engine off. Turn on engine, it goes off, so now sitting with battery disconnected. One guy says he fixed with a new battery. Hmmm...shot in the dark. Never had this problem before, but we get a lot of rain here recently moved to Oregon. Very hard on Mercedes.
Sounds like you have a communication issue in the car. Engine module wont be the issue if theres no physical damage. Check engine bay fuse box for water and corrosion.
I am haveing the same issue with my C180 1.8 kompressor year 2005. It's saying - A camshaft position actuator circuit open bank 2. Any help would be great
Hi, thanks for the great video on this topic. I've been suffering through the same problem on my 2007 CLS550 for over a year now! Can you share the contact info of the ECM vendor you used in New York who fixed the ECM?
He thx for this video i want to ask you You removed this iprom from the old one and put it in the new one ? And the car work @the new Or removed the iprom from the new and put in old and still @ the old one and thx you
So with this module the eeprom was not enough, there is a second chip that needed swapped but I have no information on which one so I had to put them back. The eeprom did not have the vin information so the car would not start.
That is crazy you had to do all that for a fan noise... seems like a poor design issue. Mine sounds loud like this on my 2010 e550 but only when I start the car with the ac on. If I start the car with it off the fan doesn't crank up like this. When the fan runs loud it won't shut off until I turn the car off. It is currently 100+ degrees out here so i'm wondering if the fan running like this is normal or if I have some issue? Also that is one clean engine bay.
@@MasterTechLou thanks also was wondering if you still do online diagnosis. I tried your site but it was not working. Having a number of strange issues but no check engine light.
Hi I was reading the description and was wondering the eeprom module that you swapped and worked still was that the original to a used ecu or vise versa? Thanks
Master Lou been a while learning so much in the Mercedes world buddy 2000 s430 had radiator fan issue replaced it now the 60 amp fuse is smoking I can’t scan it because it’s s class and my open port can’t read it. What do you think buddy send me on a path you always right
Howzit bro I have a Mercedes Benz c180k 2009 model Day before yesterday it was raining n I hit a water patch the car switch off didn't what to start had to get a break down, yesterday left hold day it started but My come off conternesly no lights work no wipers work I don't what to check for😅
IMHO if the ECU doesnt send a signal to the Fan to run it fast , its not the ECU, its the Fan control module/motor thats faulty , only if the ECU is erroneously requesting the Fan to turn on even when the air is not on and its not hot because you just started the car , then it cant be the ECU it has to get erroneous request fromt the ECU for it to be the ECU problem , other wise your throwing your money away on a new ECU when its the Fan control module ie motor on the Fan , is my laymans answer based on watching a bunch of too fast fan videos however I do have an error code ECM - Engine Control Module(ME) P203E-004 No CAN Message From Instrument Cluster Or Message Faulty. Communication Fault / See Also CAN Status In Freeze Frame data(P0600) could this error message indicate a ECM fault causing the fan to run fast at start based on your diagnosis video ???
I have a Similar problem with my Mercedes Benz S550 year 2010 so at first my problem was my Belt I didn’t realize that my serpentine belt was no longer on the car is shredded. It’s sold to pieces so then I had to buy a whole new entire belt and install the belt. Then the car wouldn’t start due to low votes in the battery so I had to get a new battery now the car starts up and the fan doesn’t run all the time anymore he used to run for approximately 3 to 4 minutes after the car shut off and it sounds like it’s winding up or after I cut it on no once I cut it on the fan runs and then when I cut the car off it goes off in about a minute.. but it’s not as worse as it was before
Hey Lou great video! I just had a ECU swapped for my son's 2001 Mercedes c240 car runs & drive however, Flagship One dis not write vehicle's VIN on ECU.....Would you please share the contact that guy Mike (in New York) coz I really don't want to mail ECU to Portland, Oregon to do this. Thanks! AJ
I have the same issue with my 2007 Mercedes CLK Class 350. The AC fan won't work. Where did you send the computer module at NY exactly? How much they charged you?
why on earth Mercedes did not use a fan relay as an ultimate safety switch after engine is powered down , this relay would ensure battery does not get drained unnecessarily, with my knowledge of electronics i can tell you that integrated control fans have power transistors that can fail and continue to run the fan as it has permanent battery feed, so a relay would have cut all power to it unless the ignition was on when the fan would come on even if not needed, in an emergency you would still be able to use your car, why i am here is because a friends 230 Merc has fan coming on at Full Speed almost so frightening standing near it as blades could fly off it and hurt someone, I diagnosed issues with its engine control module that is sending permanent 12v into the control wire the green wire I believe is earth, brown and green wire is where the signal appears, the fan was tested ok, so if you do not connect control terminals and only apply ground and power to fan's big terminals it does not run, so fault is in control unit which should send pulse width modulation control signal to run fan and at appropriate speed depending on how hot the engine is and how much cooling it requires.
Master tech lou, thank you sir for this video. I have the same MB scan tool. By just watching this video and how you showed how to view sensor data for the AC controller (indoor temp at 142 degree on mine), I was able to determine that the issue on my ac compressor and condenser fans not activating, was due to the ac controller switch panel inside the truck. I bought a use one off ebay, swapped them out, and "boom" everything works perfect. The next thing to tackle is to swap out the overhead sunroof switch panel, which also has a indoor temp sensor. Thank you sir
MB modules r the worst since MB is very paranoid about " safety" and car theft. Hence they it make nearly impossible to do what Mike tried to do-- and failed. EIS modules r the same way and cars often have to b towed to the dealer
Hi Lou,i have same problem for 4 month.I changed 2 batteries ,mas and map sensor,water tem sensor,egr valve secondary air pump ac compressor,ac pressure switch none of these help after your video i found out there is no voltage in green wire to the fan and no voltage in fuse#47 but car start and run.I forgot to mention the car is 03 e320 and i changed fan too. I am not able to find your email and none of email and info that you have in you tube work is there any hope for help from you thanks Fred.
Awesome who’s the guy in ny Is he in the city and what was the charge from having the same issue with my 211 I’m gonna troubleshoot first to see if Ecu but I’m betting it is
That's what I want to specialize in - diagnostics, module troubleshooting and repair...after finding a faulty module. I watched one guy do it. He had some really specialized test equipment, like an electronic engine simulator in addition to a signal generator, oscilloscope, DVN and even a Microscope. Yeah...I love that kind of stuff.
Hey Lou, I have the same problem in this video, my fan comes on a second after I start the car and turns off when I turn off the car. My codes are P20CD
sorry we have no way of looking up codes. We only get code diagnosis through the Mercedes scanner. there are a few reasons why fans will come on full speed. one is programming of the engine module, one is failed coolant temp sensor. failed fan, wiring, failed ME.
I was looking online and found a nice c class w203 mercades for sale and the description says that the cooling fan is always on. I priced a module for €231 which is 251 in dollars. Would the same module from another mercades w203 need to be programed or is it plug and play? Thanks in advance from Ireland 🇮🇪
My 2004 clk500 amg, have the same problem plus the interior don't work only the radio, no wipers,a.c,turn signal,horn and speedometer,gas level and temp level, won't do anything when start after couple trying
So sorry to hear, check my video on 5 tips mercedes owners should know. You probably have water or corrosion in the front fuse box area or floor. If you need my help with diagnosis you can reach me at my site www.cartechconnect.com If not then its best to have a shop look at this. Thanks, Lou
Honestly with a scanner and monitoring the ac pressures and temp sensor for the engine and checking to see who is asking for the fan activation, engine module or ac module, this sounds like a super easy diagnosis.
Appreciate the video! This has been an issue in my ‘07 e550 for several years now, and no one has been able to figure it out. Would you mind sharing the contact you used to reprogram the ECM? Much appreciated.
Hello Lou, I’m facing issue with my fan i believe, it sound like the one in the begging of the video it goes higher and down. Do you have an email or any other social media account so i can send you a video of the issue. Many 🙏🏼 thanks
Hi lou! I also experience this kind of issue in my 2006 E280. However, its kinda different as the ac is still breezingly cold, and the fan would turn off by itself while the outside temp is below 30 celcius or as if i was driving with low engine load (for example cruising at 60 mph), does it have to do with ecm too or is it normal? Thankyou for answering. Aldo from indonesia
Hey Lou, wow great video. I am also having the same issue regarding my fan on my C300. No codes at all as well. I was thinking it was the front sam because it happened shortly after some water intrusion. My AC is also having some issues so I wasn't sure if the AC can also trigger this fan condition. I wanted to know if there was a way to test the front sam and AC to see if it's the problem? Thank You for your video. You have me as a subscriber for sure.
the front sam does not actuate the fan only the engine module on your model. basically with the scan tool you need to see if the engine module shows 0% activation, if the fan is on then the engine module is bad.
@MasterTechLou Hello I have a jet like noise coming from the hood of my 09 Benz e350 4matic and the ECU was replaced but no change . Please I can use your advice
First thing todo is check the coolant level. If it’s below the sensor it will engage the fan constantly, mine was running I topped up a little coolant then it was fine. Suggest do this before taking apart wires and such
See I knew you were cool, a fellow guitarist. I don't have that exact issue, but on really hot days when starting the car up the fan sounded like that. I assumed it did that because the A/C was on trying to cool the interior quickly, it would be like 120 degrees inside the car when started. Since it's cooled off outside, I don't hear it loud like that anymore. Also, I kinda want a small scan tool to put in my "go" tool bag I carry for trips out of town, is that iCarsoft a decent "just in case" tool?
🎸, icarsoft isnt bad. But there are a lot more options since I made this video. To me the A30m from xtool is such a good deal and super compact. But check out the ton of reviews I have done on my channel. See what else interests you.
No, since the module is vin coded its called TRP item, Theft Relevant Part, so the only way to get it fixed , well the way its supposed to be fixed, is the dealership is the one that has to install it to verify its installed in the right car so its not stolen. The dealer will not sell you any TRP part over the counter.
I just watched your video & praying my car don't have the same problem.. it's a 2001 S430, however I have a coolant sensor light on in my dash and my fan will not cut off.. it doesn't Rev but my battery had died I bought a new one after installing the battery the fan came on without me starting the car. Do you think if I change the coolant fan sensor that this will take care of the problem? Please help thank you 🙂
Hello, this model of yours does not Usually have the same problem, it’s usually a bad fan or fan control control module. It could be a coolant temp sensor but its best to have it diagnosed instead of trying parts.
Try doing what some people call a hard reboot by joining the positive and negative together obviously don't touch the terminals leave overnight the refit and try it worth a try
This guys name was Mike. But if you do this kind of work and are successful then maybe we can work together because I get a flood of emails askin who and where to send ecm’s to.
Thanks for featuring our Benz! Thanks for all your help Lou. For all you viewers and possible customers: Lou is a great mechanic. He is relentless in finding answers in auto issues. He treated us respectfully and was upfront, staying in touch and explaining things. I recommend Lou very much. Thanks, Dan
Where are you located?
Use SIA Electronics for Mercedes ECU. They are awesome. Based outside of Chicago. They will completely rebuild the ECU for $220. 3 year warranty. Fixed everything on our CLS.
Hi, thanks for the great video on this topic. I've been suffering through the same problem on my 2007 CLS550 for over a year now! Can you share the contact info of the ECM vendor you used in New York who fixed the ECM?
Hi friend, we're you able to get the contact info for the ecm repair? If you still have it or know where to go could you let me know please? I have the same issue currently and the fan goes on full blast right as soon as the car turns on till its off
If you ever need to remove components like this again, invest in a hot air blower (cheap Chinese versions are fine). It will allow you to heat up all of the soldered legs at the same time. Flux will also make the job much easier
Maybe the old one had a bad soder point. That can happen and quite often.
Another fix we have performed for fan run or no run. Installed a new circuit to control radiator cooling fan, thru the use of a manual switch in driver's dashboard. The customer has to turn on during operating of a/c, and city traffic. Saved the customer $$$. My favorite Mercedes-Benz, 126 chassis 300 SD turbo diesel, easy to diagnose and repair, all kinds of engines room, and built like tanks!
That intake flap code shouldn't be ignored. That year E-Class is notorious for the plastic linkage snapping, resulting in a intake flap that will not open. Will lead to other emission issues and possibly more electrical faults. That year also has a manufacturing install defect of electrical wiring in the trunk on the driver's side hinge, behind the plastic trim.
The issue is the wires were zip tied to the hinge from the factory too tight. It results in the brown wire breaking resulting in the trunk release button inside not working as well as rear trunk brake light being inoperable as well.
There was also an extended warranty placed on fuel pump and filter unit in those years. It fails resulting in a fuel smell inside the cabin. The Mercedes Benz dealer in Bloomfield Hills, Michigan refused to honor the warranty, even though headquarters verified it was covered. Apparently independently owned locations can do that. Stupid! They tried to charge over $2k to repair. Did it myself for under $200, wasn't that difficult. Unit is located under the rear seat. Good luck!
I am currently having this issue. But it’s only when the car is running. I took it to two Mechanic and they haven’t been helpful. Thanks for video guess I’ll be showing someone this video of what needs to be done.
Hi, thank you for all ur usefull videos. It means a lot to people that have to deal with dishonest dealerships and mechanics.
I diagnosed a w204 c350 2012 with icarsoft and I get the following error message:
P220101
The NOx sensor( cylinder BANK 1 ) has a malfuction. There is a general electrical fault.
How is it possible to know which exact sensor (MB part number) I need to replace?
Thank you
Can I get the guy from NY info - same prob here
Same. . May I have the info as well
Funny, I'm a professional musician working on my c207 & my sister's w203 & its always awesome seeing professional mechanics, etc playing their own music in their vids!
Also, never knew about early m272's having bad ECM's. That's slightly terrifying hahaha....I just had a 0521 paired w/ a hard cold start & same fan nonsense. Coolant temp sensor read a fault also & had one on hand so fingers crossed. My bank1 tumble flap sensor is undercurrent, so also praying I can just swap that before I check the front of the dreaded intake manifold for you know what.
Thanks for what you do!
This may be the same thing with the 08 c300. The motor looks the same. I replaced the coolsnt temp sensor; IAT senor and thermostat those cides were showing. The fans before i changed everything would stay on cimtinuously or not be on at all.. im going to try and tap the ECU and test it. I replaced my 07 300 CPU with a new one from the Flagdhip one auto; i had to flash it with that onboard diagnodtic its not just going to plug and play.. Thanks for the info..
This was happening on a c class estate I recently bought I watched a few you tube videos and decided to start cheap and work up firstly I noticed the battery was brand new but looked very small and on looking closer found the battery had smaller CCA and lower ah than what was supposed to be on the car so luckily I had just bought a new battery for my s class which was obviously bigger CCA and ah I joined the positive and negative together in the boot and left overnight fitted the s class battery started the car with fingers crossed and no more fan on continuous from cold and no fan over run I have found over the years of Mercedes ownership if there is the slightest drop in battery voltage or performance it starts to play havoc with the electrical systems on the car hope this helps ps it won't solve everyone's problem but it solved mine
Can you re-authorize those 2007 and up ECUs with SDS or does it have to be a virgin unit? Another reason why swapping the EEPROM didn't work is because it looks like the donor ECU was not identical. I have found when doing work like this, if the ECU was made by a different subcontractor or even just a different year, the other chips on the module can be different and it doesn't know how to communicate with them. I always try to get the exact same part number and versioning.
Thank for this information your share. i need to ask you something i have 2011 Viano W639 when i drive the AC is perfect when i stop in traffic the coiling is so low i changed the AC compressor (Denso) and new condenser as well what you think from your work experience the issue? thanks for your time.
Thank you, sounds like weak compressor or low freon,. that is the only thing that comes to mind .
i just replaced my radiator a couple days ago. but once i turn the key on the fan went on full busted high speed. its killed my battery, so do you think its still the control module? the video was very helpful, but from what i seen and heard its looking and sounds like thats my problem. any feed back will be helpful.
Walter Q Franklin all you need to do is follow the test steps.
But its possible a wire broke to your fan which would do the same thing.
I’ve replace 2 alternator on my 2005 e 500 left me stranded twice and now I have a problem with my battery dies in few days. Can yo help me ? Thank
@@josephdispensa1475 very important to get the alternator from the dealer or correct vendor as not all the alternators work properly in these cars. Also you have a battery draw most likely or just simply poor connections to the battery or alternator
I am having the same issue with my car. It started a year ago. At that time, I disconnected the battery and took to a shop. No issues until yesterday. I dis connected the battery overnight and this morning the fan turned on full speed. The car was cold and off. It hasn’t happened again. I need to get fixed. Your video was on point. Thank you so much.
Thank you as well!
my car was doing the same thing, so was it a control module issue?
@@MasterTechLou p
@walterqfranklin7465 did it end up being the SAM or control module?
That sounds scary like it will blow up....I would be running...LOL. Thanks for the help!
perfect
i watched your video in Iran. i wanted sent you a message in your website but i couldn't.
please help me how i can connect with you, Thank you.
not sure why you couldnt connect on my website? email me direct at diagnosisunlimited@gmail.com
@@MasterTechLou because in Iran we have lots of filtering and i don't know why your website must be filter.
how ever i open it with anti filter but i couldn't sent too you my comment.
Not so smart place to put an ECM. Vibration alone is too much abuse not to mention the heat.
blows my mind why they put control modules on engine or engine bay in all the heat
MiG Ren E' good question. Next question 😂
Just got a call guy says his 2006 r350 blower motor won't turn off ,my autel 908spro is broken
90% of the time water is in the blower and resistor housing, its one piece/part from dealer. not sure if aftermarket sells individual but they wont work. Issue is common an a blower/resistor fixes it. dont take my word for it, do your diagnosis please.
Lou
Im having the same problem with my 2019 c 300 mercedes benz. My fan comes on high speed and my ac is warm. Have you had any newer models with this problem? I'll have to invest in a diagnostic tool.
Yes usually a bad pressure sensor sending wrong pressures so ac is cut off and fan is ran on high as a safety.
Use of flux makes soldering enjoyable.
I have never used it (obviously 😂😢) and this is why I personally dont do stuff like this . My first and last attempt.
So to understand . I am no mechanic . The problem is on the computer ? Recently my computer was changed for a “new “ and this problem happened . So if it is on the computer I believe is on my guarantee . That is why my question
Correct, the engine control module is faulty
Dear friend u have great video now i clone these ecm/tcm mercdes oem scanner
WHATS UP..GREAT VID!! I'M IN NYC WITH THE SAME PROBLEM W219 2007 CLS550. CAN U DIRECT ME TO GUY IN NY? NOBODY CAN TELL ME WHATS WRONG WITH THIS FAN.🤷♂️
so sorry not sure why I did not get this notification, with an 07 you have the same issue most likely.
Hello! So what's the name of the shop in NY that was able to correctly perform the VIN swap?
Am I to understand that swapping the chips was unnecessary given that the guy in NY transferred all the data?
My 02 C230, battery died recently...when I recharged it, and reconnected, fan is running constantly with the engine off. Turn on engine, it goes off, so now sitting with battery disconnected. One guy says he fixed with a new battery. Hmmm...shot in the dark. Never had this problem before, but we get a lot of rain here recently moved to Oregon. Very hard on Mercedes.
Sounds like you have a communication issue in the car. Engine module wont be the issue if theres no physical damage. Check engine bay fuse box for water and corrosion.
I am haveing the same issue with my C180 1.8 kompressor year 2005.
It's saying - A camshaft position actuator circuit open bank 2.
Any help would be great
If you need help you can reach out to me at my site.
Www.Cartechconnect.Com
Thank you. Lou
Hi, thanks for the great video on this topic. I've been suffering through the same problem on my 2007 CLS550 for over a year now! Can you share the contact info of the ECM vendor you used in New York who fixed the ECM?
Did you get the contact info?
I need it now also
He thx for this video i want to ask you
You removed this iprom from the old one and put it in the new one ? And the car work @the new
Or removed the iprom from the new and put in old and still @ the old one and thx you
So with this module the eeprom was not enough, there is a second chip that needed swapped but I have no information on which one so I had to put them back. The eeprom did not have the vin information so the car would not start.
Happened to my car = 2016 C-Class.. change complete engine module.
David Estate sorry to hear :( such a crappy way to have to spend that money.
Was it Victor in New York fixed module?
Mike
Nice sharing my friend
well done
Thank you so much!
I sent my EIS to a guy in Michigan and he gave me the same excuse and tried to keep my money was it benztekpro?
Peanut Man mercedesecm and ecuwarehouse same “company” im sure this “place “ goes by many names. In my experience they are to be avoided.
god !!! keep me away from this kind of mechanics !!! AMEN !
I hope this video helped. Thank you. Lou
@@MasterTechLou man... instead of admit of "not being good at soldering" you bean an ignorant ;)
Good job...
@@aldinoaldinovic6282 fix your english
@@GhosteUA-cam who are you? what's your problem ?
this is not about my English my friend.
That is crazy you had to do all that for a fan noise... seems like a poor design issue. Mine sounds loud like this on my 2010 e550 but only when I start the car with the ac on. If I start the car with it off the fan doesn't crank up like this. When the fan runs loud it won't shut off until I turn the car off. It is currently 100+ degrees out here so i'm wondering if the fan running like this is normal or if I have some issue? Also that is one clean engine bay.
Fan will run with ac on, to cool ac, depends on pressures of ac system and outside temps. if its 100+ then I can assume its normal operation.
@@MasterTechLou thanks also was wondering if you still do online diagnosis. I tried your site but it was not working. Having a number of strange issues but no check engine light.
@@Dnasty1 I closed my site. You can find me at justanswer.com Lou P
Hi I was reading the description and was wondering the eeprom module that you swapped and worked still was that the original to a used ecu or vise versa?
Thanks
both, i swapped from bad to good back to bad. there are 2 chips I could not find the location of the second one. :(
Master Lou been a while learning so much in the Mercedes world buddy 2000 s430 had radiator fan issue replaced it now the 60 amp fuse is smoking I can’t scan it because it’s s class and my open port can’t read it. What do you think buddy send me on a path you always right
Howzit bro
I have a Mercedes Benz c180k 2009 model
Day before yesterday it was raining n I hit a water patch the car switch off didn't what to start had to get a break down, yesterday left hold day it started but My come off conternesly no lights work no wipers work I don't what to check for😅
Fan
Water In fuse box most likely
Will a bad engine modular make the engine not start, but the fan run on high speed
That happens due to no communication with the module. Either no power at the module, communication issues with the data bus, or bad engine module yes.
IMHO if the ECU doesnt send a signal to the Fan to run it fast , its not the ECU, its the Fan control module/motor thats faulty , only if the ECU is erroneously requesting the Fan to turn on even when the air is not on and its not hot because you just started the car , then it cant be the ECU it has to get erroneous request fromt the ECU for it to be the ECU problem , other wise your throwing your money away on a new ECU when its the Fan control module ie motor on the Fan , is my laymans answer based on watching a bunch of too fast fan videos
however I do have an error code ECM - Engine Control Module(ME)
P203E-004
No CAN Message From Instrument Cluster Or Message Faulty. Communication Fault / See Also CAN Status In Freeze Frame data(P0600)
could this error message indicate a ECM fault causing the fan to run fast at start based on your diagnosis video ???
Hello
Sir
I have the same problem. But if i dont use the aircon it doesn't do it. Have you any ideas. Thank mate
@@johnvine9611 pressure switch is bad or too much freon
I think I'm having the same issue on my 2011 W204 C300. I hear the AC pressure sensor may be the issue.
I have a Similar problem with my Mercedes Benz S550 year 2010 so at first my problem was my Belt I didn’t realize that my serpentine belt was no longer on the car is shredded. It’s sold to pieces so then I had to buy a whole new entire belt and install the belt. Then the car wouldn’t start due to low votes in the battery so I had to get a new battery now the car starts up and the fan doesn’t run all the time anymore he used to run for approximately 3 to 4 minutes after the car shut off and it sounds like it’s winding up or after I cut it on no once I cut it on the fan runs and then when I cut the car off it goes off in about a minute.. but it’s not as worse as it was before
Hey Lou great video! I just had a ECU swapped for my son's 2001 Mercedes c240 car runs & drive however, Flagship One dis not write vehicle's VIN on ECU.....Would you please share the contact that guy Mike (in New York) coz I really don't want to mail ECU to Portland, Oregon to do this.
Thanks!
AJ
I have the same issue with my 2007 Mercedes CLK Class 350. The AC fan won't work. Where did you send the computer module at NY exactly? How much they charged you?
why on earth Mercedes did not use a fan relay as an ultimate safety switch after engine is powered down , this relay would ensure battery does not get drained unnecessarily, with my knowledge of electronics i can tell you that integrated control fans have power transistors that can fail and continue to run the fan as it has permanent battery feed, so a relay would have cut all power to it unless the ignition was on when the fan would come on even if not needed, in an emergency you would still be able to use your car, why i am here is because a friends 230 Merc has fan coming on at Full Speed almost so frightening standing near it as blades could fly off it and hurt someone, I diagnosed issues with its engine control module that is sending permanent 12v into the control wire the green wire I believe is earth, brown and green wire is where the signal appears, the fan was tested ok, so if you do not connect control terminals and only apply ground and power to fan's big terminals it does not run, so fault is in control unit which should send pulse width modulation control signal to run fan and at appropriate speed depending on how hot the engine is and how much cooling it requires.
When you read the ecm codes...
You missed 10 codes.
You also didnt check right side sam.
Ave the info for the guy in NY? My 2009 c300 is doing the same thing
Master tech lou, thank you sir for this video. I have the same MB scan tool. By just watching this video and how you showed how to view sensor data for the AC controller (indoor temp at 142 degree on mine), I was able to determine that the issue on my ac compressor and condenser fans not activating, was due to the ac controller switch panel inside the truck. I bought a use one off ebay, swapped them out, and "boom" everything works perfect. The next thing to tackle is to swap out the overhead sunroof switch panel, which also has a indoor temp sensor. Thank you sir
Hey glad it helped some way!!!! I appreciate you reaching out!
I have a benz c230 and it's doing the same thing thanks for your video, I hope to touch base with you.
Plus I am from the Caribbean
thank you so sorry on delay, I am not sure why I am not getting my notifications.
Ha that was a ride, I don't think I'm going this deep on my fan issue, but I enjoyed watching your work here. Nice guitar work on that track, btw.
Hi I live in Lagos Nigeria,my CLA 250 makes the same noise!
MB modules r the worst since MB is very paranoid about " safety" and car theft. Hence they it make nearly impossible to do what Mike tried to do-- and failed. EIS modules r the same way and cars often have to b towed to the dealer
hi there love your videos been helpful but do you have one about the cooling fan Not working many thanks
حد فهم
Hi Lou,i have same problem for 4 month.I changed 2 batteries ,mas and map sensor,water tem sensor,egr valve secondary air pump ac compressor,ac pressure switch none of these help after your video i found out there is no voltage in green wire to the fan and no voltage in fuse#47 but car start and run.I forgot to mention the car is 03 e320 and i changed fan too. I am not able to find your email and none of email and info that you have in you tube work is there any hope for help from you thanks Fred.
FAN RUNNING LIKE THAT, THATS F*%&ED UP !! NO EXCUSE FOR THAT SHIT !! NOTHING !!
I just want to know where you put the second head of the multimeter when reading the fan signal line, thanks, i love your video
The only thing missing on the desolder is flux. Other than that great work.
Well thanks!
@@MasterTechLou honestly your approach takes the "magic" out of car repair!
Awesome who’s the guy in ny Is he in the city and what was the charge from having the same issue with my 211 I’m gonna troubleshoot first to see if Ecu but I’m betting it is
1900 watt fan?
IT DOESN,T MAKE ANY SENSE WHATS SO EVER WHEN WE HAVE COMPUTERS IN CARS !!!WTF !!
Hey Lou, wondering what the company or guy you used to reprogram your ecu. I'm experiencing the same issue with my vehicle
That's what I want to specialize in - diagnostics, module troubleshooting and repair...after finding a faulty module. I watched one guy do it. He had some really specialized test equipment, like an electronic engine simulator in addition to a signal generator, oscilloscope, DVN and even a Microscope. Yeah...I love that kind of stuff.
can you recomend somone to send out a mercedes engine control modules im in the same boat as you im in ny
Hey i need a new ecm. Can u please tell me where you got yours from. The website please. Thanks
car-part.com
I have that exact same problem.
I use "Spare ECM" ... very good, nice, and professional.
OK. Good lesson
Thank you John.
Hope this helped.
Lou
Just wanna clear things. So if I swap chip with new one it should work? If not then change the ecu to another one?
Have the same issue w221 s550 M273
Theres two chips that need swapped however there is zero info I have found on which other chip has the immobilizer data
Hey Lou, I have the same problem in this video, my fan comes on a second after I start the car and turns off when I turn off the car. My codes are P20CD
sorry we have no way of looking up codes. We only get code diagnosis through the Mercedes scanner. there are a few reasons why fans will come on full speed. one is programming of the engine module, one is failed coolant temp sensor. failed fan, wiring, failed ME.
I was looking online and found a nice c class w203 mercades for sale and the description says that the cooling fan is always on.
I priced a module for €231 which is 251 in dollars.
Would the same module from another mercades w203 need to be programed or is it plug and play?
Thanks in advance from Ireland 🇮🇪
Hello Ireland! in my video I explained everything. They are vin specific modules.
My car is doing this but only when it rains (not every time it rains). Do you have the guy's contact information who replaced the ECM?
Then its not your issue and you have water killing communications in your cars modules
Great video, gave me a sense of peace. would you mind sharing contact info for engine control module.
My 2004 clk500 amg, have the same problem plus the interior don't work only the radio, no wipers,a.c,turn signal,horn and speedometer,gas level and temp level, won't do anything when start after couple trying
So sorry to hear, check my video on 5 tips mercedes owners should know. You probably have water or corrosion in the front fuse box area or floor. If you need my help with diagnosis you can reach me at my site www.cartechconnect.com
If not then its best to have a shop look at this. Thanks, Lou
Got a 2002 S430, the cooling fan will stay off until the car reaches a temp past 82 degrees celsius, and then it stays on. Got any leads?
Honestly with a scanner and monitoring the ac pressures and temp sensor for the engine and checking to see who is asking for the fan activation, engine module or ac module, this sounds like a super easy diagnosis.
Appreciate the video! This has been an issue in my ‘07 e550 for several years now, and no one has been able to figure it out. Would you mind sharing the contact you used to reprogram the ECM? Much appreciated.
sorry for the delayed reply, reach out to me on IG.
Hello Lou,
I’m facing issue with my fan i believe, it sound like the one in the begging of the video it goes higher and down.
Do you have an email or any other social media account so i can send you a video of the issue. Many 🙏🏼 thanks
Instagram
Great diagnosis bro
It's a 2007 r350 mercedes
My gl 08 does this can you just unplug it until I get a new one soon before I trade it out not wanting to put money into great stuff also
Thanks!
If you unplug the fan your engine will overheat.
Hi lou! I also experience this kind of issue in my 2006 E280. However, its kinda different as the ac is still breezingly cold, and the fan would turn off by itself while the outside temp is below 30 celcius or as if i was driving with low engine load (for example cruising at 60 mph), does it have to do with ecm too or is it normal? Thankyou for answering. Aldo from indonesia
Sounds normal, have to check live data to see if ac is requesting the fan to be on. That will tell you for sure.
Would a Launch x431 be able to clone a ECM to swap?
No it cannot
Hey Lou, wow great video. I am also having the same issue regarding my fan on my C300. No codes at all as well. I was thinking it was the front sam because it happened shortly after some water intrusion. My AC is also having some issues so I wasn't sure if the AC can also trigger this fan condition. I wanted to know if there was a way to test the front sam and AC to see if it's the problem? Thank You for your video. You have me as a subscriber for sure.
the front sam does not actuate the fan only the engine module on your model. basically with the scan tool you need to see if the engine module shows 0% activation, if the fan is on then the engine module is bad.
Hi Lou. I have a similar problem. Mine sometimes does it as well when the car is off.
My issue was resolved by a changing the refrigerant high pressure sensor on the condenser. It was reading incorrectly too high.
@MasterTechLou Hello I have a jet like noise coming from the hood of my 09 Benz e350 4matic and the ECU was replaced but no change . Please I can use your advice
My radiator cooling fan wont come on at all on my 01 c320..what should i do?
Hello and thanks. The system functions the same as the car in the video. The video shows the process, thanks.
Hi good evening. My ac reset fan won't turn off even when the car is not running how can I stop it please
Remove the under dash panel on passenger side dash, unplug the fan. If you are talking about the blower motor for the heating and ac .
First thing todo is check the coolant level. If it’s below the sensor it will engage the fan constantly, mine was running I topped up a little coolant then it was fine. Suggest do this before taking apart wires and such
Does the guy in NY does airbag module swap
I do not have that answer sorry.
See I knew you were cool, a fellow guitarist. I don't have that exact issue, but on really hot days when starting the car up the fan sounded like that. I assumed it did that because the A/C was on trying to cool the interior quickly, it would be like 120 degrees inside the car when started. Since it's cooled off outside, I don't hear it loud like that anymore. Also, I kinda want a small scan tool to put in my "go" tool bag I carry for trips out of town, is that iCarsoft a decent "just in case" tool?
🎸, icarsoft isnt bad. But there are a lot more options since I made this video. To me the A30m from xtool is such a good deal and super compact. But check out the ton of reviews I have done on my channel. See what else interests you.
@@MasterTechLou Thanks Lou, I will look them over.
Im having the same issue on my glk350, how much would you charge to fix?
Sorry I can not fix this for you.
Can you just order one with the same vin #?
No, since the module is vin coded its called TRP item, Theft Relevant Part, so the only way to get it fixed , well the way its supposed to be fixed, is the dealership is the one that has to install it to verify its installed in the right car so its not stolen. The dealer will not sell you any TRP part over the counter.
I just watched your video & praying my car don't have the same problem.. it's a 2001 S430, however I have a coolant sensor light on in my dash and my fan will not cut off.. it doesn't Rev but my battery had died I bought a new one after installing the battery the fan came on without me starting the car. Do you think if I change the coolant fan sensor that this will take care of the problem? Please help thank you 🙂
Hello, this model of yours does not
Usually have the same problem, it’s usually a bad fan or fan control control module. It could be a coolant temp sensor but its best to have it diagnosed instead of trying parts.
Try doing what some people call a hard reboot by joining the positive and negative together obviously don't touch the terminals leave overnight the refit and try it worth a try
why didnt u just clone it with ktag thats wat i did
I didnt personally have that equipment
I think I'm the guy in NY you sent to lol
This guys name was Mike. But if you do this kind of work and are successful then maybe we can work together because I get a flood of emails askin who and where to send ecm’s to.
Solder wick and solder sucker would of made this job way easier. But great 👍 info
Thanks, I dont do this sort of thing, sure it’s obvious by my terrible soldering skills on circuit boards, 😂.
No worries man I’m not grilling you. Just trying to help out. I do it daily for a living. And used to swap chips out for Nissans and Honda Ecus.
@@smoke1va didnt take it that way at all ❤️