Remik

Hello everyone,
So with in a few meters, I get ESP error then ABS then the transmission goes limp mode , I loss the speedometer end gas gauge as well . Took it to the shop , codes shoes those 2 famous sensors in tranny . Can t remember ( speed sensor and something else) take the TCM out send it for repair . Come back . Still same issue… transmission shop send it to 2 other repair shop .. same issue . There is a reading for all 4 ABS sensor .. so maybe it,S an electrical issue . So took it to an electrician . He tells me it S the TCM bit to look at possibly the ABS control module . Got 2 used ones installed . Same problem but it got a little better now I can drive for about 2 kilometres before it all goes back to errors and limp mode . Local MB dealer will not take the car , they claim it S too old and I did not buy the car from them . What else can I do ?! Total loss here

BlackML550

Itis not unusual for an ABS Speed sensor to throw a fault code which then impacts the transmission. Did you ever scan the car for fault codes when it happended the first time? If so, what codes came up?

The logic is that the speed sensors on each wheel which measure wheel speed translate that information back to the ECU and transmission. The transmission can go into limp home mode because its having trouble reading the wheel speed from the ABS Speed Sensor.

I'd be getting the car scanned again with a scan tool that will to MBs. Look for speed sensor codes and then let us know what the codes are.

Remik

Thank you !
i found something new , so I turned off the ESP/ ABS and the transmission is working fine , drove it about 60km with no issues . So now it’s safe to say that it’s not the transmission. Going to back to garage next week to get rescanned .

BlackML550

Well that would point to it being a speed sensor issue. My suspicion is that your mechanic may have had you fix your tranmission for nothing. I'd be taking that to task with them if it turns out to be something else. Maybe you need a 2nd opinion from another mechanic.

You should buy a scan tool. Less than $200 will get you a decent one where you can read and clear the error codes. As another poster here said "You need to be able to have a conversation with your car". You'll save the $200 on the first diagnosis fee. It's well worth it and you will learn a lot. I don't leave home without mine.

Remik

I get tons of codes , all 4 wheels rpm signal and all 4 wheels speed sensors. I have changed the ABS controller 4 times now (used) I m wondering if there is wire issue . Somewhere between the ABS module and transmission. Because the TCM keeps giving code 0723 Y3/9b5 ( the reason the transmission shop same the TCM for rebuilt ) what a nightmare ! Anyway when I removed the ABS module I saw 2 rusty prob . What does those prob do ? Added picture . I wonder if the ABS pump itself could be the issue ?

ABS pump rusty probe ,

BlackML550

In detail, what are the codes you have right now? That is what we should concentrate on.

Remik

BlackML550

Most of the codes are speed sensor related. In saying that, all 4 speed sensors are triggering codes which is pretty unlikely they have all failed at once. Do you drive on salty roads/snow or where there is lots of dust? The traction control codes more than likely come from the fact the speed can't be read.

I assume your battery is in good health. Min 11.7 v with engine off and 12.7v with engine on. If not, that alone can trigger codes as modules are very sensitive to even small drops in voltage. The fuel related codes could be from this. Have you disconnected or jump started it at all? That can do it to. I assume whoever scanned it, then cleared the codes.

Next thing is to look at where the speed sensors connect to. Its probably the module you've highlighted with the corrision, but let's check it first to see if there isn't something in between that and the sensors. Post your VIN and I'll see if I can find a diagram.

Remik

Thank you, for all the advise . Much appreciated! Yes , winter gets to -40c so lots of snow , ice and salt . Here is the VIN
WDDFH3DB6AJ536808. As you said all 4 wheel sensors can’t go out at the same time . Cleared the codes and it came back . New battery in a few months ago ( transmission/ ABS problem was already there) voltage looks ok I’ll have to go see but I remember a low of 12.3 and high it 12.9 I think . What is a rear axle speed signal ? Is that different sensor than the ABS sensor ?

BlackML550

Where did you read that term (Rear Axle Speed?) Note, these cars don't have a rear axle. People sometime use wierd terms as do instruction manuals. Whatever the term, its the rear speed sensors that are most likely being referred to.

Remik

Last scanned code : 00E6 vehicle speed signal of rear axle is implausible

BlackML550

I'd do the simple thing and change the rear speed sensors. They aren't expensive. Many have reported problems with aftermarket i.e. no-name brand sensors so best to buy original or a name brand such as Meyle etc. Remove the sensors from the equaltion. Experiences seem to be that they cause way too many problems given speed is such an important input to so many of the car's functions. Also, check the redactor ring as best possible for condition.

Remik

Hi, in a previous post you mentioned that you could look at at finding the wiring diagram . I spoke with an electrician and unfortunately he does have it . Transmission and abs diagrams. Is it still a possibility for you to share it ? That would help me a lot . Thank you !!

BlackML550

Here are some documents that may assist. If you need anything else, let me know. The Search Aid document highlights many (I assume all) of the wiring diagrams that are available. If there is anything on that list that you need, let me know.

Remik

Thank you ! I’ll get those to the electrician and see what he needs

Remik

Would it be possible to get :
PE27.19–p-2101BAA electronic transmission control
PE00.19-p-2300BAA or BAB ( not sure which is one for my car) Interior CAN bus
PE00.19-p-2200BAA engine CAN bus
PE54.21-p-2127BAA or BAB Signal acquisition and actuation module SAM

thank you !

BlackML550

Hi, see attached. I think you'll need to go one more level down so let me know

Remik

Yes please .
PE00.19-P-2200-97BAA wiring diagram for engine CAN bus
OV00.01-P-1901BAA search aid for all wiring diagram groups
PE00.19-P-1100BAA overview of wiring diagrams covering multiple function groups

PE00-19-P2300-99BAA wiring diagram for interior CAN bus

PE27.19-P-2101-99BAA wiring diagram for electronic transmission control

thank you
remi

BlackML550

Sorry it took so long to respond. See attached

BlackML550

some extras as well - maybe double ups so please check first

Remik

Thank you so much, appreciate all the help. I’ll send all this to the electrician and hope it’s enough to find the problem