"Coolant! Visit Workshop!"
Newbie
Joined: Jun 2012
Posts: 13
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C220 CDI SPORTS COUPE 2001
HI guys I have a similar problem
My radiator fan however doesnt turn on at all..which is worsee
I have power on my 3 wires but nothing on the ignition wire white/black stripes..
blue/green remote wire has power but the fan doesnt run still... any ideas???
I am going to try and attempt removing the harness today and check continuity along each wire.. see if my wire is faulty..
My radiator fan however doesnt turn on at all..which is worsee
I have power on my 3 wires but nothing on the ignition wire white/black stripes..
blue/green remote wire has power but the fan doesnt run still... any ideas???
I am going to try and attempt removing the harness today and check continuity along each wire.. see if my wire is faulty..
Newbie
Joined: Jan 2013
Posts: 7
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e class w211 320cdi
HI I AM A NEW MEMBER I HAVE A 2003 W211 320CDI E CLASS FOR OVER A YEAR HAVE HAD MESSAGE COOLANT VISIT WORKSHOP CAR HAS NEVER OVER HEATED,RUNS ALWAY AROUND THE 50 MARK DEALER TOLD ME LAST YEAR AROUN MAY I NEEDED NEW RADIATOR FAN,MESSAGE ONLY APPEARS NOW AND AGAIN,ALSO DEALER SAID I WOULD HAVE PROBLEM IN WARM WEATHER BUT THIS NEVER HAPPENED EVEN AFTER A 30O MILE TRIP.WHEN I ARRIVED AT DESTANATION TEMP WAS SILL AT 45 ON TEMP GUAGE I LIFTED BONNET WITH ENGINE STILL RUNNING AND FAN WAS RUNNING AT A SLOW SPEED.SO I THINK ITS JUST A GLITCH SOMEWHERE,ANY IDEAS
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
First of all,... stop YELLING,... my eyeballs have a headache now,.. ;p
Secondly,....This is W203 board,... you have w211,....
Thirdly,... read this and other threads,... it basically tell you all you need to know.
Your temp should be 85C,... when warm. If you drove 300 miles and temp is still at 45C,.... unless you're driving in Siberia,.... check your temperature sensor! Its relatively rare for rad fan to break (at least on w203),.... unless your dealer took it apart and tested it to determine it really needs replacing,... i doubt they're right.
Secondly,....This is W203 board,... you have w211,....
Thirdly,... read this and other threads,... it basically tell you all you need to know.
Your temp should be 85C,... when warm. If you drove 300 miles and temp is still at 45C,.... unless you're driving in Siberia,.... check your temperature sensor! Its relatively rare for rad fan to break (at least on w203),.... unless your dealer took it apart and tested it to determine it really needs replacing,... i doubt they're right.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If you read your stored codes you will find you have a P0128. You need a new thermostat. The Thermostat starts opening at 87 deg C & is fully open at 90 deg C. Your operating temperature should be 90 deg C. If you run the car colder it accelerates wear & increases fuel consumption.
Senior Member
Joined: Sep 2011
Posts: 305
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2001 C320 Automatic
buy all of your parts online , thermostat water pump, and while your in there change your gaskets. its easier to work on your car all day and take care of 6 things vs having to go back in the hood every other month.
Junior Member
Joined: Dec 2012
Posts: 49
Likes: 0
From: New York
2007 BMW 335i Convertible/ 2006 CLS 500
I'mm having the "coolant! visit workshop!" on my w203 also. Fan running on FULL speed. So the fault is coming from the wire from the radiator to the ecu correct?
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Junior Member
Joined: Dec 2012
Posts: 49
Likes: 0
From: New York
2007 BMW 335i Convertible/ 2006 CLS 500
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,268
Likes: 172
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
If anyone needs a new fan, I saw one on bay area craigslist NIB for less than 100 bucks.
Ah, here it is.
50 bucks!
http://sfbay.craigslist.org/pen/pts/3632674009.html
Ah, here it is.
50 bucks!
http://sfbay.craigslist.org/pen/pts/3632674009.html
Junior Member
Joined: Dec 2012
Posts: 49
Likes: 0
From: New York
2007 BMW 335i Convertible/ 2006 CLS 500
If anyone needs a new fan, I saw one on bay area craigslist NIB for less than 100 bucks.
Ah, here it is.
50 bucks!
http://sfbay.craigslist.org/pen/pts/3632674009.html
Ah, here it is.
50 bucks!
http://sfbay.craigslist.org/pen/pts/3632674009.html
?
Junior Member
Joined: Mar 2013
Posts: 65
Likes: 0
2004 c320
coll'ent
Hello,
since ~3 weeks now my on-board computer is showing "Coolant! Visit Workshop!". We went to the dealer they made a diagnosis and said we need to replace the electric coolant fan because the fan itself and the module is damaged. After replacement the message on our on-board computer is still there. Now they are telling me it's a computer module what I honestly don't believe. It would cost another $2400 just for the part. So I picked the car up and wanted to get a 2nd opinion on this. The technician said he's pretty sure it's NOT a computer module because otherwise the engine light would be on but it is not. Is that true? Since MB dealer didn't replace the coolant fluid (I couldn't find it on my bill so I assume they didn't do it) I told the other technician to do so first. I'm just hoping it is something "cheap". I also could read in some threads/posts that you always should check the level of your windshield wiper fluid because the sensor for the coolant and the windshield wiper fluid are on the same circuit. But all levels are ok. So could someone give me an idea what's going on on this car? thank you very much!
since ~3 weeks now my on-board computer is showing "Coolant! Visit Workshop!". We went to the dealer they made a diagnosis and said we need to replace the electric coolant fan because the fan itself and the module is damaged. After replacement the message on our on-board computer is still there. Now they are telling me it's a computer module what I honestly don't believe. It would cost another $2400 just for the part. So I picked the car up and wanted to get a 2nd opinion on this. The technician said he's pretty sure it's NOT a computer module because otherwise the engine light would be on but it is not. Is that true? Since MB dealer didn't replace the coolant fluid (I couldn't find it on my bill so I assume they didn't do it) I told the other technician to do so first. I'm just hoping it is something "cheap". I also could read in some threads/posts that you always should check the level of your windshield wiper fluid because the sensor for the coolant and the windshield wiper fluid are on the same circuit. But all levels are ok. So could someone give me an idea what's going on on this car? thank you very much!
use "water-less" cool'ent. yees it is more price'e, $70/gallon. but, you wont have to change it as long as you live. flush the old first. it will not rust, seeing it is water-free
Newbie
Joined: Apr 2012
Posts: 10
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2004 SL55 AMG Roadster
In the event someone else comes across this problem, I was getting this error because my SL55 AMG had sat out in 90+ degree weather (to include rain) for a week and a half waiting for a new tire; during this time the anti-freeze had begun to "stick" on the floater device in the reservoir. My fix was to take a screwdriver and "tap" the sensor to shake of the residue (if any) that might have been sticking.
Haven't seen any problems as of yet :-) Additionally, make sure the fan is coming on...
Haven't seen any problems as of yet :-) Additionally, make sure the fan is coming on...
Junior Member
Joined: Aug 2012
Posts: 21
Likes: 0
2001 C32 AMG
have come across a major problem with my c32 that is starting to depress me. Initially 3 months ago my engine fan was running on full chat for no reason. After diagnostics that is was not the fan and it was the ecu, i set out to get it repaired by BBA Reman uk. They fixed the ecu, they also said for it to be under warrantee, we would have to change the harness from the ecu to fan. As we know the 4 wired harness isnt a plug and play harness , and the whole engine harness would have needed replacing. After applying common sense, the indy recommended that he change the signal wire. by bypassing it.
It worked fine the fan was back to normal and the coolant visit workshop had disappeared.
The initial star diagnostics gave a code of open circuit to fan.
As you are aware if the fan does not get a signal from ecu it will go to emergency run to protect the engine.
It has happened again same fault. I have sent the ecu to bba again to see if they will fix under warrantee.
However if i do get it back repaired , it will happen again if i cant find the cause.
I have read that other mercedes have had this and some have had a mod applied. ie adapter harness to fan.
I cannot find this and am getting stressed.
I read that you know how to sort it. Hope you can.
if anyone knows how to deal with this please help as no indy seems to know round my area.
It worked fine the fan was back to normal and the coolant visit workshop had disappeared.
The initial star diagnostics gave a code of open circuit to fan.
As you are aware if the fan does not get a signal from ecu it will go to emergency run to protect the engine.
It has happened again same fault. I have sent the ecu to bba again to see if they will fix under warrantee.
However if i do get it back repaired , it will happen again if i cant find the cause.
I have read that other mercedes have had this and some have had a mod applied. ie adapter harness to fan.
I cannot find this and am getting stressed.
I read that you know how to sort it. Hope you can.
if anyone knows how to deal with this please help as no indy seems to know round my area.
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
Yes,... when ECU dies and there's no signal to front radiator fan, the fan spins in "emergency mode",.. spins in its default high mode like a turbine engine.
The mod adapter harness was for the CLK,... it shouldn't work on W203s (I'm assuming your UK 2001 C32 AMG is a W203,... the W203 didn't make it to this side of the pond until 2002).
The wiring harness is just a series of wires,... unless there's a short (and you'll usually see broken wires from a broken fan belt or something),... it's hard for wiring harness to mess up. That said, the weakest points of the wiring harness are the connector points,... so make sure they are ALL clean of dirt and oil,... use CRC Electronic Cleaner on the connectors. Make sure you don't have any oil leaks,.. like leaky cam magnets sensors,... also check for corrosion especially near fan connectors if you drive in snow (road salt) area.
What exactly did your mechanic do? Did they actually switch out the ECU with a new ECU and did all the required SCN coding? Did they test the current front radiator fan with control module to make sure it's not a faulty control module.
It take some real ***** to diagnose a faulty ECU,... it happens but is rare and expensive,... ask me how I know! Anyways,... a good mercedes electrical mechanic should also test the CAN-bus system, look for shorts in the wiring harness,...
How did you come to the conclusion it was the ECU at fault? How did BBA Reman UK fix your ECU? What was wrong with it?
Prior to this, was your ECU ever tuned or modified in anyway?
The mod adapter harness was for the CLK,... it shouldn't work on W203s (I'm assuming your UK 2001 C32 AMG is a W203,... the W203 didn't make it to this side of the pond until 2002).
The wiring harness is just a series of wires,... unless there's a short (and you'll usually see broken wires from a broken fan belt or something),... it's hard for wiring harness to mess up. That said, the weakest points of the wiring harness are the connector points,... so make sure they are ALL clean of dirt and oil,... use CRC Electronic Cleaner on the connectors. Make sure you don't have any oil leaks,.. like leaky cam magnets sensors,... also check for corrosion especially near fan connectors if you drive in snow (road salt) area.
What exactly did your mechanic do? Did they actually switch out the ECU with a new ECU and did all the required SCN coding? Did they test the current front radiator fan with control module to make sure it's not a faulty control module.
It take some real ***** to diagnose a faulty ECU,... it happens but is rare and expensive,... ask me how I know! Anyways,... a good mercedes electrical mechanic should also test the CAN-bus system, look for shorts in the wiring harness,...
How did you come to the conclusion it was the ECU at fault? How did BBA Reman UK fix your ECU? What was wrong with it?
Prior to this, was your ECU ever tuned or modified in anyway?
Junior Member
Joined: Aug 2012
Posts: 21
Likes: 0
2001 C32 AMG
Yes,... when ECU dies and there's no signal to front radiator fan, the fan spins in "emergency mode",.. spins in its default high mode like a turbine engine.
The mod adapter harness was for the CLK,... it shouldn't work on W203s (I'm assuming your UK 2001 C32 AMG is a W203,... the W203 didn't make it to this side of the pond until 2002).
The wiring harness is just a series of wires,... unless there's a short (and you'll usually see broken wires from a broken fan belt or something),... it's hard for wiring harness to mess up. That said, the weakest points of the wiring harness are the connector points,... so make sure they are ALL clean of dirt and oil,... use CRC Electronic Cleaner on the connectors. Make sure you don't have any oil leaks,.. like leaky cam magnets sensors,... also check for corrosion especially near fan connectors if you drive in snow (road salt) area.
What exactly did your mechanic do? Did they actually switch out the ECU with a new ECU and did all the required SCN coding? Did they test the current front radiator fan with control module to make sure it's not a faulty control module.
It take some real ***** to diagnose a faulty ECU,... it happens but is rare and expensive,... ask me how I know! Anyways,... a good mercedes electrical mechanic should also test the CAN-bus system, look for shorts in the wiring harness,...
How did you come to the conclusion it was the ECU at fault? How did BBA Reman UK fix your ECU? What was wrong with it?
Prior to this, was your ECU ever tuned or modified in anyway?
The mod adapter harness was for the CLK,... it shouldn't work on W203s (I'm assuming your UK 2001 C32 AMG is a W203,... the W203 didn't make it to this side of the pond until 2002).
The wiring harness is just a series of wires,... unless there's a short (and you'll usually see broken wires from a broken fan belt or something),... it's hard for wiring harness to mess up. That said, the weakest points of the wiring harness are the connector points,... so make sure they are ALL clean of dirt and oil,... use CRC Electronic Cleaner on the connectors. Make sure you don't have any oil leaks,.. like leaky cam magnets sensors,... also check for corrosion especially near fan connectors if you drive in snow (road salt) area.
What exactly did your mechanic do? Did they actually switch out the ECU with a new ECU and did all the required SCN coding? Did they test the current front radiator fan with control module to make sure it's not a faulty control module.
It take some real ***** to diagnose a faulty ECU,... it happens but is rare and expensive,... ask me how I know! Anyways,... a good mercedes electrical mechanic should also test the CAN-bus system, look for shorts in the wiring harness,...
How did you come to the conclusion it was the ECU at fault? How did BBA Reman UK fix your ECU? What was wrong with it?
Prior to this, was your ECU ever tuned or modified in anyway?
He did star checks and he diagnosed the ecu at fault. So I sent the ecu away for repair. It came back fixed but not completely sure what they fixed but charged me the earth. The ecu repairer said if i dont change the harness it would happen again. If we didnt do so it would not be covered by warrantee.
My indy bypass the signal wire to the fan from ecu just to be sure.
4000 miles later the same problem arose giving out the same open circuit to fan code. I have sent the ecu back for repair but not certain they will fix under warrantee.
I need a solution to this problem asap.
Help.
ps . the ecu is standard and not been tuned.
what did the clk new harness consist of ?
Bill
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
It has a 2010 fan? Original OEM Mercedes part? Can you ask the previous owner when and why the fan was changed out and if that actually solved that particular problem,.... We hear a lot of incidents where the fan spins in high mode (default when no ECU signal) and people just change out the fan thinking it's defective when in fact it's working correctly. They need to actually test the fan.
If you ever have the ECU out,... shake it,... see if it rattles. It shouldn't rattle, but will rattle if something falls loose like a chip or Crystal Oscillator due to a bad solder joint,... don't ask me how I know!
With car off and key out if ignition,... "rotate" the relay in front SAM,... relay are like large fuses,... they come in different sizes: small and large,... different colours: grey, black, yellow,... Thus, there's usually at least 2 large black ones,... so just switch them with each other,... if you can't find the same relay type in the front SAM, switch it from rear SAM. BTW,... good to use X,Y coordinates to mark original placement of relays.
I remember coming across the part number for that CLK fan harness adapter on BenzWorld.org,... CLK thread about fan blowing in high mode and car stalling.
If you ever have the ECU out,... shake it,... see if it rattles. It shouldn't rattle, but will rattle if something falls loose like a chip or Crystal Oscillator due to a bad solder joint,... don't ask me how I know!
With car off and key out if ignition,... "rotate" the relay in front SAM,... relay are like large fuses,... they come in different sizes: small and large,... different colours: grey, black, yellow,... Thus, there's usually at least 2 large black ones,... so just switch them with each other,... if you can't find the same relay type in the front SAM, switch it from rear SAM. BTW,... good to use X,Y coordinates to mark original placement of relays.
I remember coming across the part number for that CLK fan harness adapter on BenzWorld.org,... CLK thread about fan blowing in high mode and car stalling.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Did your guy with the Star run fan simulations? Your problem could also be the fan controller which is on a fly lead & comes as part of the fan assembly.
Junior Member
Joined: Aug 2012
Posts: 21
Likes: 0
2001 C32 AMG
Thanks
The fan is oem 2010 I have just sent an email to previous owner to see what the original problem with car was
My Ecu doesn't rattle but can out really hot on a hot day :/
I have an older fan to try but worried I will still have the same problem occur
I will ask my tech to check relays also
Still awaiting my Ecu to get back ATM
This is really getting to me
Bill
The fan is oem 2010 I have just sent an email to previous owner to see what the original problem with car was
My Ecu doesn't rattle but can out really hot on a hot day :/
I have an older fan to try but worried I will still have the same problem occur
I will ask my tech to check relays also
Still awaiting my Ecu to get back ATM
This is really getting to me
Bill
Newbie
Joined: Nov 2013
Posts: 1
Likes: 0
CLK 280 Avantgarde Convertible
Same story in the UK
Did you replace whole wiring loom, or just part of?
Do you have part no?
These dealers are a joke !!
Regards, KrytonV
Junior Member
Joined: Aug 2012
Posts: 21
Likes: 0
2001 C32 AMG
Obviously had the ecu fixed again first.
