mtclimber

Hi

I need your help in trouble shooting my 2000 ML55 AMG with 149,000 miles. While driving the BAS/ESP, ETS, ABS, brake pads, check engine and brake light come on. The speedometer stops working and the transmission goes into limp mode. I purchased an icarsoft scanner MBII and I get the following list of codes. Please help me decipher then and point me in the right direction. Using the Icarsoft MBII scanner the codes are as follows.

Transmission Module
134 - One or more messages from control unit N47-5 (ESP, SPS, [PML] and BAS control unit) are intermittently not available on the CAN bus. DTC Discontinuity

ESM – Electronic Selector Module
P1876 – Communication with traction system CAN BUS interfered, DTC stored.
P187601

ME2 -SFI Motor Electronics
C1025- CAN Signal Fault indicator lamp on

AAM – All Activity module
B1040-000 CAN- bus Communication control ME engine electrical component. DTC current and Stored

B1040- 001 CAN bus communication control ETS. DTC Current and Stored

EAM Extended Activity Module
B1041 – CAN bus communication contril ESP/EST. DTC current and stored.
This code occurs twice.

ICM – Instrument cluster with maintenance interval display
B1041 – CAN communication fault to traction system control module. DTC current and stored.
This code occurs twice.

Traction System
C1000 – Control Module, DTC stored
P100020

Under Generic Codes
P0720 - Output Shaft Speed Sensor
P0500 - Vehicle speed sensor.


I inspected the conductor plate electrical connector and there was floor around #13 pin. Replaced it along with the conductor plate. The outside of the connector and wiring hardness going to the TCM looks dry. I know there are experts that have seen this before. Please help.

Thanks you in advance.

Plutoe

After you changed the conductor plate did you go back and clear all the faults-----if not do so----------then after you run around------what faults if any return???

mtclimber

Hi
Thanks for replying.

The codes listed are after I replaced the conductor plate. I have deleted the codes twice since I replaced the conductor plate. Also, I cleaned front ABS sensors and no change. The difficulty is that it is sporadic and does not occur at a set interval after I delete the codes.

Plutoe

If that is the case than look at 0720, that's a faulty speed sensor on a new conductor plate that you just installed---something doesn't sound right, else it's a do over!

Then I would solve the wheel speed sensor issue as that impacts all those traction related faults!!

mtclimber

Update
I have beed driving with the icarsoft scanner hooked up looking at the sensor signals. When all the lights come on, the scanner no longer sees vehicle speed signal. The graph drops to zero and stays at zero until the car is turned off. I am not sure where the vehicle gets the signal to calculate the speed. Is it from the ABS sensors or is there anther sensor on the transmission that provides the signal for the vehicle seed?

Is there a way to test the resistance on the speed sensor with an ohm meter?

Thank you for your help.

nivram13

Did you ever resolve this I'm having a similar issue.

XXSlowpokeXX

Funny as it got cold out my dash board started flashing in its entirety. Almost as though its resetting. Once the car warms up everythings fine Car runs fine while this is occurring. Just today my odometer reset itself to 00000..WTF!!!!! Im going to make a post on this

nivram13

Turns out mine is the SAM module failing, will be replaced next week.

mtclimber

I have not had the chance to work on it. Someone suggested the ESP module since one of the codes was C1000. I opened it and could not see anything suspect. I am glad you found the problem. Did you have it diagnosed by someone or did you do it yourself?

Thanks.

XXSlowpokeXX

Does that also have the odometer reading flashed into it?

nivram13

Odometer is not flashing but the speedo is not registering and just shows 0KMH even when I'm driving and as of today car has gone into limp mode and will not change gear.

bholmberg

Ok. i'm having the same issue as this. 2003 ML270
DASH lights on: BAS/ESP, ETS, ABS, BRAKE WEAR, EPC, HAND BRAKE
BEHAVIOUR: needs over-ride to move from park, no speedo respnse, no brake lights, no gear changes. drives fine in 1st!
TRIED: changing brake, checking fuses, checking wires for wear.

looks like I should suspect the SAM module? did this fix your issue Nivram13?
and MTclimber, did you ever find a solution?

nivram13

So my issue in the end turned out to be faulty magnetic speed sensor ring in one of my wheel hubs, extremely difficult to troubleshoot as it, the magnetic ring passes by the speed sensor which is used by the ABS module. If this signal is interrupted you get ESP\ABS warning along with a fault code for a faulty SBC unit. Early diagnosis from the dealer said it maybe a failing SAM module which turned out to be incorrect.

The replacement part was $15 and and 1 hour to change, the dealer tried to tell me the SBC unit needed to be replaced at a cost of $2500!!

mtclimber

nirvam13
I am glad you were able to fix the problem inexpensively.


bholmberg
I have not been able to solve the problem. I have a C1000 ESP module code along several other codes (please see my original post). The C1000 indicates that there is an internal issue with the ESP unit.

Using an icarsoft MBII scanner I found out that the car looses signal from all 4 wheels, all at once, and I cannot figure out why. I have checked the power circuit for the ESP module and there are no fluctuations or interruptions when all lights come on. I have checked the ground wire as well and wire looks good. I also checked the power from terminal 30. Terminal 30 supplies power to the ESP module.

I ended up purchasing a MBstar diagnostic scanner from MBstartool that I am in the process of learning. According to my scanner there is a terminal 87 test but there is no terminal 87 on my wiring diagram so i am not sure what to test.

I took the cover off the ESP module and the board looks great, like brand new. I find it hard to believe that the module is bad but it could still be. So far I have not found any evidence that it is bad.

The symptoms are similar on my MB and yours. The only difference is the "over-ride to move from park." I am not sure why this is. It may be related to the later year and model. Since you are loosing speedometer signal I would check to see if you are loosing signal from all 4 wheels. You need a scanner for this.

Have you had the car scanned? Having the codes will steer you in the right directions.

Hope this helps.

bholmberg

great information Nivram13, and mtclimber. I am having the car diagnostic scanned soon, probably early next week, I will keep you posted on progress. thanks.

bholmberg

I have also purchased an MB diagnostics scanner, and have a list of codes, all relating to the fact that there is no signal at all on the CAN bus from the esp module. MTclimber, you said you took the cover off the ESP module, and the board looks great... how did you get the cover off? i've removed the module, but the cover seems incredibly well glued on, as though i'd have to destroy it to open it up. can I just ask, was your module on the abs pump(2003 onward), or in the electronics box (2002 back)

mtclimber

Mine is a 2000 ML55 AMG and the ESP is next to the Fuse box in the Driver side. It is pretty easy to take off. Please see the included picture.

mtclimber

So were you able to scan the car? What were the codes? Did you get it fixed? I ended up buying a star diagnostics and i am in the process of trouble shooting. I got stuck at one of the procedures. It asks me to check terminal 87. Does any one know where is terminal 87?

Thanks

bholmberg

Yes i was able to scan the car with a long list of codes relating to the esp unit not responding to the CAN bus. Also all the speed sensors were reporting bogus speeds, wheels were 0kmh, shaft speed was something like 268kmh. I ended up replacing the esp unit with a used one (cost was around $350 Australian) and took about an hour of my labour once the part arrived. In my car the esp control unit is attached to the front of the abs pump under the washer fluid reservoir, and was relatively easy to change, i believe it's different in older ML's. I also smashed open the old esp control module for diagnostics and inside was a tiny part on the board that had burnt out(I'll try to find the photos). Does that information help?

photos.app.*******/s3N2vBdnENpgHtIs1

Replace the stars above with goo dot gl
Not sure how to add a link ti image library which may help

extremera

Hello.
Same issue and same solution on my W203 (year 2002).
Issue appeared when battery dead and I tried to start the car some times.
5 errors on display: EBS, ESP, EPC, ABS and brake lining wear. And NO speedometer and NO odometer.
Only Error B1101 in standar ODBII scanner
Solved exchanging a second hand ABS electronic module with exactly same Part Number, same HW version and SW version. Old one smelled burn and there is something inside sounding when shaking it
Just swapping, no need of programming. Start the car after swapping and then only "ESP a ABS no available" errors: turn wheel righ to left and ran a couple kilometters: ALL errors gone!