ASR fault on W124 M104890

[Brabus 3.6-24]

Hi there.

First i would like to say GREAT forum you got here.
Im from Denmark so exuse my english is a bit poor "i think"

I was wondering if any one can help me to find the problem with my ASR.
My car is a 1991 W124 300-24 (M104890) "not the 93-96 280/320"

My car is equiped with the great ASR system wich means that the cars accelerator system is elektronical.

I have my ASR error light on in the dash board.
The problem started to be pressent some times but got worse and finaly permanent.
When the ASR light came on i could still drive the car as it was not going in to the famus limp home mode as the later models did like the 280/320
But at the same time the ASr light came on the CC / cruise controle would always go infunktional (not working)
How ever when the error first came i could always just recircling the key (stop and start again) then the ASR light would disappear until next time.

When i look at my engine, i se my gas cable attached to a lot of linkage that is attached to what is discribed as the speed position sensor where also the cable from the automatic gearbox is attached.
But another linkage is going down to the throtle body with some kind og a metal linkage that has a spring inside like some sort of possibility to adjust the throtle without the influence of the position of the speed pedal.
That gives sense because from the throtle body there goes another linkage down under the inlet manifold to an elektric engine that is soposed to manage the throtle bodys opening of the gas.

on pin 14 in my 16 pins diagnostic plug, i got 5 codes read out

4 = CC switch (S40)
5 = Stop lamp switch (S9/1)
6 = Starter lock-out/backup lamp switch
7 = CAN data bus signal from EA/CC/ISC, ABS/ASR, HFM-SFI or LH-SFI (right or Left) control module
9 = Left rear axle vihicle speed sensor from ABS/ASR control module or in W124 chassis Hall-effekt speed sensor.

I havenīt read the codes out before the error accured so I donīt know if some of them where old codes.
I didenīt had the chance to erease the codes before my mecanic just went changed the speed position sensor (more than 900$)
it got the mercedes number 000 540 1817

unfortunatly this didenīt solve anything
My car still has itīs ASR light on it is still not working togehter with the CC and im just over 900$ more broke.
BUT all the codes could be eraesed after this and has not come back ever sinse, but again i donīt know if it where old codes as i didenīt had the chance to erase them before the repair
I want to change the electric motor or what ever the linkage is attached to under the inlet manifold but it is realy not very easy to get there nor se anything from the top or bottom as the starter and a lot of other stuff is in the way.
This is clealy not the easy job as on the later M104 model 280/320 where it sits on top of the inlet manifold as a part of the throtle actuator.

Can anyone help out here to get to the bottom of this ASR and CC problem, please help, im dying to get it solved without ridiculess bills at a dealer shop as I already has been a victim for now 1 time.

Best regards to all of you.
BRABUS 3.6-24

[Arthur Dalton]

I would change the brake lamp sw before anything..common ASR problem..

[Brabus 3.6-24]

THanks for reply.

I already tried that with no resault.
I also messured the contact at the old switch and it worked fine.

But what i noticed is, i compared my car to another one with the same engine and with the ASR system.
His electrical engine that is located under the aluminium inlet manifold was deffently working as you could hear the engine run as the gas pedal was pushed (ignition ON, Engine OFF), mine is dead silent and is not moving at all, leaving the linkage to adjust the throtle, but this is only working if I remove the linkage that is attached to the electronic device i mentioned is attatced under the inlet manifold, othervice it holds against the throtle pedal and i canīt give it some gas to rev up the engine.
without this linkage i am also able to se "if" the electronic device is acturely moving the linkage, but it is dead silent and not moving

Im almost sure it is this electronic throtle actuator i think itīs named on the later model, but haw can i check that for sure before bying antoher expensive part?
And does anyone know the Part number for this M104890 EA device?
Anyone even know the M104890 model 300-24 ? and the ASR system that this engine is equiped with?
It is deffently different to the later M104 280/320 engine ASR system.

Best regards from my to you

[Arthur Dalton]

Both the brake sw and the NSS have brought up a power glitch codes..there is only one way thay can do that...by having a connecion failure.
Most likely intermittant.
I would also spin all the fuses in their holders...and check for equal tire sizing/pressure.
If coupled with ABS lamp, I would also suspect the OVP or
a low voltage condition..This is not a diagnosis..it is just verycommon problems/remedies one would find on these systems

[Brabus 3.6-24]

yes.

It is effently not the tire size that influence the non working EA with the Ignition ON and Engine OFF i think.
i have also checked the NSS located at the gearboks, that was changed for only 1 year ago due to start problems.

my guess is that it is this EA, i located the plug on the inner fender, so now i just need to find out what to messure ?

[Arthur Dalton]

I agree...but it certainly could be the OVP or fuse connection ....

..which is why I mention the complaint being coupled with ABS lamp..that is same feed on the later models , not sure on yours, as I have no schematics for that chassis...

[BMG]

Could you have a non functioning ETA? Is it possible the wire pigtail failed from it?

Reaching for straws here.

[Brabus 3.6-24]

If anyone can find the part number for the EA on my engine type M104.980 i will be pleased
My EA is identical to the one found on the W124.051 chassis with the same M104.980 engine
My BRABUS option has not changed anything about the ASR system or the way it works.
I found the plug that goes to the EA from the Control metal box and it is identical with the plug from the Speed position sensor with the part number 000 540 1817
What can be messured here at the plug of the EA? any ideas?
This could be a very easy way to locate my problem to the EA as I am sure this is the problem with my ASR.
What pins goes to what inside the EA?

BR
BRABUS

[Arthur Dalton]

Sometimes this opens , sometimes it doesn't

http://www.garagelibrary.com/dl/index.php?dlid=4

If yes, then go to model/yr., ... then wire diagrams,.. then schematic pages 138/EA...138/1 EA/CC w/asr , ..and 152/4-ABS w/ASR/EA systems.

These are what I have here when we started the test procedures .
You have already establish OVP feed for N/30, fuse feed for N4/1 , and the ground I had you do was to verify the neg side of those circuits for completion to ground.

You will see where I was going with the test and this will give you what you need to procede to next test/s .
Mine next choice would be EA Close throttle sw. contacts by checking pins 6 and 7 with ohm meter , as that is in that power chain.
It is my contention that your ASR system is not being activated due to a power feed problem , so that is why I way concentrating on that series of circuit feed components/connections. That is shown in those schenmatics and that is where you may want to continue.

Good Luck

[Brabus 3.6-24]

WHen i click on the link, i get a CD download site.
I guess i should downlaod that, and then follow your instruction right?
Or is it directly on the site you mean?
I canīt find the wire diagram you refeer to?

When i try to click on download the W124 cd i get this info:

Error:
Sorry but you do not have permission to view this page. Contact the admin if you think you should have access to this page.. If you believe this to be in error, please quote the above error and report this to the admin

[Arthur Dalton]

Try log in /register on the left side.

Like I said , sometimes it works , sometimes it doesn't
He emailed me a few weeks ago and said he is working on it...

It was a cool site for the CD , but he ran into trouble with some systems.

If anyone has the CD you know , the schematics are in there for the 124.051 w/ASR-EA / 90 thru 92. The 124 CD is a set of two, with the schematics on CD #1.
I assume yours is the same.
Once you have the schematic , you can follow the circuits and decide which test . I have no instructions .

[deanyel]

EA is not an unambigous abbreviation. In various MB literature it can mean engine actuator, electrohydraulic actuator, electronic accelerator, etc. EA / electronic accelerator isn't a single part, it's a system including the EA actuator and the EA control unit. You have the part number for the actuator from post #16. The part number for the control unit is 124 545 01 32. But still it's hard to know how Brabus may have altered your car.

[Brabus 3.6-24]

Originally Posted by deanyel

EA is not an unambigous abbreviation. In various MB literature it can mean engine actuator, electrohydraulic actuator, electronic accelerator, etc. EA / electronic accelerator isn't a single part, it's a system including the EA actuator and the EA control unit. You have the part number for the actuator from post #16. The part number for the control unit is 124 545 01 32. But still it's hard to know how Brabus may have altered your car.

Your right it can means a lot of things, some times itīs also called the ETA but that is in my opinion the later models setup, where it all is sitting in the throtle body.

If I should piont it out or what you call it, then the system on mine is working like this:

The gas pedal is by wire, the wire goes to the rods that goes and pulls the speed position sensor(0005401817 ), the position of the gas pedal is seen/messured from the speed position sensor and then it sent the signal to the VDO Controle module metal box located behind the battery as you descriebed (1245450132).
The Controle box see the signal and then send this information to the "Final Controle element" or the Electronic Actuator if you will, the part number i miss...
From the Elektronic Actuator/Final Controle Element (wich is the electrical little motor) There is a Rod going up to the thing you posted in post #16 and that is not the EA that is the Throtle body switch/Throtle housing (0021402353 )

You can say that in a M104.980 this 4 speed/gas responding elements is sitting 4 differents places in the engine compartment.
1 Speed position sensor
2 Controle module, metal VDO box (behind battery)
3 Electronic Actuator/Final Controle element/ the thing that electrical adjust the throtle.
4 Throtle body Switch/Housing.

On the later model like the 3.2 M104 the ETA is one thing where you got my numbers 1, 3 and 4 in one unit instead of 3 units sitting 3 different places.
Until now we got all the part numbers on the parts 1, 2 and 4, but we are still missing the part number on number 3 (the EA)

Correct me if Iīm wrong but I Think you got the idea of the electric device that pulls the trotle(EA) is located inside the throtle body, that is not the case on the early ASR system, it sits another place under the inlet manifold and pulls the throtle body by the Rod with number 59 in my previuos picture.

I hope Im not the one that misunderstod something here?

Best regards
BRABUS

[Brabus 3.6-24]

Ok, I Acturely think i got one CD with some W124 manual and technial materials, ill go check.

But one thing i still donīt get, how can I have the ASR lamp lit up right from the start of the car, and no error codes to read out on #14 I Acturely got 17 flash on pin #8 the DI module. that indicates the Crankshaft position sensor faulty.
But it goes away when the car is started, and i think that is normal as the computer canīt see the positions sensor working with only the ignition On and engine Off.
But still strange that i donīt have any codes on pin #14 i think.

[Arthur Dalton]

If you have CD #1, that is where the ASR/EA schemitics will be found.
As far as codes at 14...My suspect is the ASR is not being powered up so it will have no ASR codes b/c it can not search for them if that system has no power/is not activated.
An ASR lamp should go out after start ..if it does not , then it is not ON...so your wheels spin. Your problem is you have NO ASR Activation.
So, that is why I was checking ASR feed circuit chain.
If one see EA on a schematic.. EA means that schematic is for a system with Electronic Accelerator.

An example of such would be---Schematic 124.0/.2.. ABS System - with/ASR/EA .

Reason being you can have an ABS schematic WITHOUT an EA system.
Your chassis HAS an EA system.