W124 E200 with no ignition on cylinders 1 and 4
- Thread starter joe prosser
- Start date
That thread is about a faulty HFM unit. joe prosser needs a PMS ignition control module which lives on the OS inner wing & looks like this -
018 545 10 32 is an extremely rare unit, I have never seen one & it doesn't show up in MB's EPC.
I have the correct PMS unit with the follow on part number, the successor to 018 545 10 32 if you like.
joe p I can't PM you so if you are interested in finding out more put up an email address & I'll get in touch.
I have been baffled by a E200 with a M111.940 engine. the VIN number is WDB1240192C208379.
The primary problem that this exhibits is that the engine will never rev beyond 4000 RPM whether stationary or on the move.
The second problem is that when the AC clutch is energised the engine struggles valiantly before disengaging the clutch and restoring the idling. Starting, idling and revolutions upto 3900 is absolutely smooth while on no load.
Would you sir be able to tell me what is the correct ECU number as I am not sure if the current ECU is from another breed of MB's, not the 111.940.
Kindly let me know the correct ECU and Bosch part number please.
grober
MB Master
Wrt the above A018 545 11 32 is listed under the later W202 model rather than the W124 if that is the number on your ECU? As you suspect I think possibly your car has had an engine transplant at some point- possibly from a later W202 model with which they shared the same basic engines. In terms of your rev limit problems there used to be an engine rev limit when a car was stationary to prevent overreving with no load. Not sure where this came from ----gearbox or speedometer - my guess would be that the ECU is not getting the "vehicle moving " signal and imposing a rev limit because it thinks the car is stationary. Its possible that the ECU also needs an "AC engaged" signal to compensate for any extra load. In the absence of these two signals the ECU is going to behave as you describe. Who ever did the transplant achieved basic functionality but omitted [ perhaps due to a lack of the appropriate wiring loom ?? ] the fine tuning aspect.
grober
MB Master
Crossed wires as usual with resurrected posts 
- simply responding to karadi's post which included your picture without checking back .
What do you think about the rev limit / aircon theory being down to a wiring/ lack of signal problem?
- simply responding to karadi's post which included your picture without checking back . What do you think about the rev limit / aircon theory being down to a wiring/ lack of signal problem?My abject apologies, firstly I was away and was not able to attend to the car and respond to the forum, secondly and more importantly - I have posted the wrong picture.
.The car has a Siemens unit and not a Bosch unit - This is a PMS system and not a HFM system - The number is 015 545 69 32. I have been consulting various others locally and I am told that the Membrane pressure controller A0000781489 / A0000781889 could be bad, but I get the feeling that the limiting of the revolutions exactly at 4000 RPm time and again could be due to a signal being absent and therefore the revs are being limited. What are the possible sources of the ECU getting signal not to allow the engine to rev beyond 4000, though the car is moving.I would really appreciate inputs from senior & experienced members on this forum.
Attachments
grober
MB Master
This might help? It appears to mention a road speed signal from the ABS unit?
http://ftp.hamsk.ru/auto/W124/MB_200E_1993/WIS docs/Проверки/PMS.pdf
PAGE 9 of this manual gives the fault codes for road speed signal VSS
http://w124uk.com/forum/library/engine/fault codes.pdf
http://ftp.hamsk.ru/auto/W124/MB_200E_1993/WIS docs/Проверки/PMS.pdf
PAGE 9 of this manual gives the fault codes for road speed signal VSS
http://w124uk.com/forum/library/engine/fault codes.pdf
Request for further step by step assistance.
Yessir ! This is a manual transmission. From what you refer, the ABS signals to the ECU must be from the wheel speed sensors in the front or from the rear axle sensor situated on the differential. I am told by the owner of this car who is my friend, that the ABS is faulty.
How do I check whether the wheel speed sensors are not faulty and where do I check for wiring continuity ? Request step by step guidance please.
Yessir ! This is a manual transmission. From what you refer, the ABS signals to the ECU must be from the wheel speed sensors in the front or from the rear axle sensor situated on the differential. I am told by the owner of this car who is my friend, that the ABS is faulty.
How do I check whether the wheel speed sensors are not faulty and where do I check for wiring continuity ? Request step by step guidance please.
grober
MB Master
Quote:
Originally Posted by grober View Post w124 abs - Page 2 - Mercedes-Benz Owners' Forums
The OVP feeds the following -----the ABS control unit., the motorised idle control unit, and the engine ECU. A fault in one may drag down the voltage in others? I would give the motorised idle valve a careful clean up internally in case its bunged up. While the fuses on the OVP may be OK the relay itself may develop component dry joints in the little internal circuit board due to vibration over the years. Try taking off the relay top can and remelting/resoldering all the component connections on the PCB- or get a friend who is handy with a soldering bolt to do it for you.
I had a hunch and I did just that, I opened the OVP re;ay and resoldered all the connections and resealed the relay. The idling issue was partly reduced, that is , the problem of the engine struggling to cope with the load of the AC, trying valiantly twice before the electric clutch on the AC gives up and then idling steadies. Obviously the engine fuel system is not getting a feedback to increase fuel supply when the Ac is turned on. Is this due to the Vacuum System or the engine speed sensor ?
Originally Posted by grober View Post w124 abs - Page 2 - Mercedes-Benz Owners' Forums
The OVP feeds the following -----the ABS control unit., the motorised idle control unit, and the engine ECU. A fault in one may drag down the voltage in others? I would give the motorised idle valve a careful clean up internally in case its bunged up. While the fuses on the OVP may be OK the relay itself may develop component dry joints in the little internal circuit board due to vibration over the years. Try taking off the relay top can and remelting/resoldering all the component connections on the PCB- or get a friend who is handy with a soldering bolt to do it for you.
I had a hunch and I did just that, I opened the OVP re;ay and resoldered all the connections and resealed the relay. The idling issue was partly reduced, that is , the problem of the engine struggling to cope with the load of the AC, trying valiantly twice before the electric clutch on the AC gives up and then idling steadies. Obviously the engine fuel system is not getting a feedback to increase fuel supply when the Ac is turned on. Is this due to the Vacuum System or the engine speed sensor ?
BenzieStar7
New Member
- Joined
- Sep 7, 2016
- Messages
- 13
- Car
- W124 E200 M111.940 1995
hi
i have the same issues on E200 W124 1995
due to water damage my Siemens PMS i.e. A015 545 70 32 faulty due to shortage mainly on the upper socket
got burnt sign and car wont start due to no spark.
now trying to get used PMS for my M111 engine.
Question - Since my upper socket has blown - do i need to get new set of new harness ? before connected to new PMS?
Can a E220 W124's PMS work on mg E200 ?
Do I need to replace the old ignition coils since before my car can't start I can only rev my car up to 4000 RPM only ?
is it due to car running 2 cylinders?
Do i need to reset my car setting once I have change the new PMS?
glad if your guys can help?
my email [email protected]
i have the same issues on E200 W124 1995
due to water damage my Siemens PMS i.e. A015 545 70 32 faulty due to shortage mainly on the upper socket
got burnt sign and car wont start due to no spark.
now trying to get used PMS for my M111 engine.
Question - Since my upper socket has blown - do i need to get new set of new harness ? before connected to new PMS?
Can a E220 W124's PMS work on mg E200 ?
Do I need to replace the old ignition coils since before my car can't start I can only rev my car up to 4000 RPM only ?
is it due to car running 2 cylinders?
Do i need to reset my car setting once I have change the new PMS?
glad if your guys can help?
my email [email protected]
hi
Hello, answers below in blue.
i have the same issues on E200 W124 1995
due to water damage my Siemens PMS i.e. A015 545 70 32 faulty due to shortage mainly on the upper socket
got burnt sign and car wont start due to no spark.
now trying to get used PMS for my M111 engine.
I have working & tested PMS units with the part # 015 545 70 32. Shipping to Malaysia is no problem
Question - Since my upper socket has blown - do i need to get new set of new harness ? before connected to new PMS?
I don't know, maybe someone else here will be able to advise.
Can a E220 W124's PMS work on mg E200 ?
E220s don't use PMS units, at least here they don't. They use HFM units.
Do I need to replace the old ignition coils since before my car can't start I can only rev my car up to 4000 RPM only ?
Yes, replace them or you risk frying your new PMS unit.
is it due to car running 2 cylinders?
Do i need to reset my car setting once I have change the new PMS?
No, PMS units are not coded, they are plug & play.
glad if your guys can help?
my email [email protected]
Hello, answers below in blue.
i have the same issues on E200 W124 1995
due to water damage my Siemens PMS i.e. A015 545 70 32 faulty due to shortage mainly on the upper socket
got burnt sign and car wont start due to no spark.
now trying to get used PMS for my M111 engine.
I have working & tested PMS units with the part # 015 545 70 32. Shipping to Malaysia is no problem
Question - Since my upper socket has blown - do i need to get new set of new harness ? before connected to new PMS?
I don't know, maybe someone else here will be able to advise.
Can a E220 W124's PMS work on mg E200 ?
E220s don't use PMS units, at least here they don't. They use HFM units.
Do I need to replace the old ignition coils since before my car can't start I can only rev my car up to 4000 RPM only ?
Yes, replace them or you risk frying your new PMS unit.
is it due to car running 2 cylinders?
Do i need to reset my car setting once I have change the new PMS?
No, PMS units are not coded, they are plug & play.
glad if your guys can help?
my email [email protected]
grober
MB Master
SEE
http://www.mbclub.co.uk/forums/electronics/208435-ecu-problem.html
upper plug seems to be associated with the abs unit??
http://www.mbclub.co.uk/forums/electronics/208435-ecu-problem.html
upper plug seems to be associated with the abs unit??
BenzieStar7
New Member
- Joined
- Sep 7, 2016
- Messages
- 13
- Car
- W124 E200 M111.940 1995
How much the used ignition coils ? got photo samples? what is the logic behind replacing it?
kindly explain since this is my first experience....thx
grober
MB Master
I HAVE UPDATED THIS THREAD WITH SOME NEW LINKS.
http://www.mbclub.co.uk/forums/electronics/208435-ecu-problem.html
The lower socket X11A is the main engine socket- I assume this is the water damaged one??
pins 3 and 13 fire the injectors [ 2 together at a time] and pins 10 and 11 fire the coils [2 together at a time] Both work by earthing the injectors or the coils through the ECU-- THE COILS AND INJECTORS BEING SUPPLIED LIVE ON IGNITION SWITCH ON.
In terms of whether the plug is damaged visual inspection for burned connections is all you can do. The connectors may be able to be cleaned up with a small file depending on damage. don't know if the plug can be stripped down or its a sealed job?
http://www.mbclub.co.uk/forums/electronics/208435-ecu-problem.html
The lower socket X11A is the main engine socket- I assume this is the water damaged one??
pins 3 and 13 fire the injectors [ 2 together at a time] and pins 10 and 11 fire the coils [2 together at a time] Both work by earthing the injectors or the coils through the ECU-- THE COILS AND INJECTORS BEING SUPPLIED LIVE ON IGNITION SWITCH ON.
In terms of whether the plug is damaged visual inspection for burned connections is all you can do. The connectors may be able to be cleaned up with a small file depending on damage. don't know if the plug can be stripped down or its a sealed job?
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