Hi guys, i have one W176 A45 4matic 2014.
Last week the car start move the 1st gear out return to N and appear the message of "4matic unavelable at this moment". So every time that i put the first gear the car move for 10 meters, return the gear to N and again apear the message.

I've requested to an dealer to run the Xentry Diagnostics scan and the following issues appears:

1 - "DKG - Electronic trsmission control for double-plate clutch transmition (N15/13) = 061B00 The torque calculation of the control unit has malfunction "

2 - " PTS - Parktronic (N62) = U010100 Communication with control unit "transmission has malfunction "

Since they doesn't have any experience with A45 AMG cars here in my region they suggested to change my entire gearbox here under warranty , but my car has just 300 miles and i not feeling good to do that.

Is anybody aware of this issue or know how we can procced to fiz this issue?? Or where this modules mentioned above are placed on the car, maybe they can change just them avoid remove all my gearbox.

Any help will be more than welcome.
Best regards,

PS; i've placed the pictures attached to help see what is the failiure.

 

Hi, i have the same problem, have you solve the problem? thanks

 

What happens if you start at 2nd gear? Has the transmission control unit been reset?

 

I cant start with 2nd gear, put the M mode, shift to 2, still in gear 1. Already perform full basic setting on TCU and replace the VGS (second hand), still get the same code.

​​​​​​There was other codes that tell communication with control unit transmission has a malfunction. P13C700 also appears. Checked the exhaust valve, works good.

Can ECM causing this problem? I think the car has been tuned, i can hear pop n bang from the exhaust.

 

I found this: VGS fault codes

 

[QUOTE-
Can ECM causing this problem? I think the car has been tuned, i can hear pop n bang from the exhaust.[/QUOTE]

Yes, "bad" writing to the ECM can cause many problems. I modified many units, but only for diesel engines. For petrol engines, the increase in power is not so great. For the AMG, modifying the ECM is very complicated and, if you do not know the limits, so dangerous, because the service life of the engine or transmission / or only certain components / can change to a few months.
The question is how to find out if the ECM is overwritten. It is best to get the original data and compare the files. It would be a big complication if the overwritten file is locked. It can't be edited via OBD and sometimes not even loaded - it depends on how the one who rewrote it locked it.
The AMG 45 is the most powerful 2.0 liter engine in the world, only a crazy person may want to rewrite the ECM. But it is true that crazy people exist. I always say - better bad ECM transcript after which the car does not work at all than the one that kills the car in 2 months.

 

Thanks for the fast reply, now looking for loan ECM and check for wiring+grounding. The car is GLA 45 year 2015 with 7k kilometers.

Other codes also appears:
1. AWD: Communication with control unit Transmission has a malfunction
2. ECM: Communication with the electronic selector lever module has a malfunction
3. Electric parking brake: No Can message received from control unit ISM + No Can message was received from control unit transmission
4. Electronic power steering: Communication with the control unit combustion engine has a malfunction
5. ESP: No Can message was received from control unit transmission + No Can message was received from control unit ISM + No Can message was received from control unit Engine + One or more dignals sent from control unit engine via the can bus is implausible
6. DTR: No can message was received from control unit motor electronics + No can message was received from control unit electronic ignition lock + CAN signal shutoff function distronic from control unit ESP is implausible
7. PTS: Communication with control unit Transmission has a malfunction
8. Backup Camera RFK: Communication with control unit Transmission has a malfunction


Thank you

 

Hi, according to this DTC, I don't think there is a problem with the ECM override. Performance overwriting or chiptuning overwrites Flash memory. If the transcript was bad = DTC completely different and only in the ECM. If someone modifies - overwrites the Eeprom memory, e.g.
EGR Off or Immo Off, etc. = DTC completely differentagain. Your errors correspond to a problem with the system's internal communication. If you are connecting to Star Diag / Das, Xentry / open the ENGINE , open CONTROL and find CAN CHECK or CAN TEST etc. / It differs depending on the version /. And perform the Test. If the check / test is OK, clear the DTC. If the test detects a problem a CAN Dtc will not delete. Run a short test / scan all . Immediately after scanning, clear all DTCs / F9 / then / F5 / - search all again, after scanning F4 and F8 - display only error units - error details. If you don't have a Star diag, try to find it. The control units do not communicate with each other - this is a problem with your A45. The best option is therefore Star diag. Or at least Bosch KTS540 and higher.
Is the battery in the car 100% OK? Fully charged? If possible, disconnect the vehicle from the battery overnight. What diag are you using now?

 

Hi, already tried the ECM from working CLA 45, problem still the same. I found in ESP live data, the front (both left and right) wheel speed sensor not reading, only read rear wheel speed. Ordering the speed sensor, and we'll see what happen.

Scanned the car using: Launch X431 pro, SD4 and Autel IM 608. I havent try to perform CAN check with SD4, will do this later.

The battery is good

thank you

 

Hi, how did you try another ECM / CLA45 /? Did you put it in your car / A45 /? What good is it if the car doesn't work at all? Or did you think you would replace the ECM from the "same" model and take a test drive? Idea - the idea is very good and also logical. I believe that it could definitely have worked at the time I was born / 1969 /. The cars didn't need much electronics. Today, they are dependent on electronics. So if you replace the ECM from another or exactly the same car - there will be no test drive - the engine will not start. And DTC will increase. For MB w163 270 CDI year 1999 you have to replace 4 control units + key from the other car and then you can start.
Wheel speed sensor - Speed ​​Sensor / I will write only SS /
If the SS stops working, the ESP and others will stop working and emergency mode may occur. But communication between control units will never be interrupted. It just doesn't work. SS cannot cause a short circuit / is powered by 0-5V /.
SS is very important for driving - you don't have to look for it in real data - if it doesn't work you have a DTC immediately. It is not possible for the SS not to work and there is no DTC. How many times is the SS only dirty and the DTC is that the SS has untrustworthy values ​​or is not working properly, etc.

I have never seen both SS on the same axle stop working at the same time. Both SS work completely independently and are not dependent on each other. If the SS does not operate, the DTC is immediately on ESP. If there is no DTC on the ESP then the ESP either does not operate or does not communicate. I think buying new SS is bad practice / buying is too soon. From my point of view, you are doing the opposite. Because if ESP doesn't communicate or doesn't work, you can buy SS every day and nothing will change even if you buy gold SS. I'm not saying that SS are working - I'm just saying that it's very unlikely that both SS will stop working at the same time, I'm saying that if SS are dead, they must be afraid of DTCs at least from ESP, I'm saying that if there's no DTCs, ESP doesn't communicate or is dead. , I argue that buying new SS will not solve the problem with ESP.

That's how bad it is. Connect SD4 - short test - after test - clear errors. Reload / short test / after completion - open control units that have DTCs. Take photos of all DTCs. . Open the ECM / control / check CAN / or test CAN / perform and shoot the result.
If the car has 7,000 km, then maybe it's under warranty, right? Or is it repair after an accident, or fire, water, etc.?
Or do you claim that the car was driving normally nothing happened and suddenly it is in such a condition?
Connect to SD4 only

 

I cloned the ECM from CLA45 to GLA45 using FlexBox (TCU & ECU Programming Tool - FLEX - MAGICMOTORSPORT), car still can work normally, but still having the same fault code.

Well, the facts is the car did not showing ESP error and replacing both front speed sensor did solve the problem .

Thanks

 

Of course congratulations on the repair!
Yes, a unit rewrite is of course possible. You just wrote borrowed, and put in your car ... That's why I shook my head.
So you're telling me the SSs have changed and these DTCs are gone?
You know there are DTCs that have nothing to do with SS ...
I don't believe it, or you have a magical SS ... But in an error in the ECM, yes - "she stayed hanging" and he woke her up to writing. But I don't believe in the magical SS.
Not that you end up in a tree ...
Thanks

 

Yes, replace both front speed sensor, check live data, front speed now can be read. the car drive normal now with no DTCs.

 

Last sat
- car starts to show the below on first early startup
'4mactic unavailble, without changing gear, consult workshop


tried scanning for fault and off my engine
- car no longer start and PRND doesnt show which gear anymore

according to Xentry
communication with Control Unit 'transmission' has a malfunction

together with
DIRECT SELECT, steering, ESP, AWD ETC

as i was told that my tcu could be damaged, i proceed to order a brand new TCU. I cloned the data from my original tcu to the brand new tcu (using flex) backuo successfully done

Install NEW TCU AND car still cant start with same message

PLUG IN xentry and now shows new fuel pump fault code ( N118, CONTROL UNIT 'fuel pump' FSCU07 ) together with same tcu communication issues - see attachment

what could be wrong? Tcu changed and cloned from original tcu (flashed stage2)

should i somehow get someone to go online for programming or where should i check?

thanks

 

further to my last post,

i went ahead and bought a virgin new TCU - VGS-FDCT

SWOPPED IN and no communication with addtional fuel pump error

mechanic rechecked the canbus on fuses - they unplugged few fuses n refit in
and car
managed to fire up

did a fork adaptation and car drive fine for few miles

will update again as car is currently replacing drive shaft cover

PS: prior to my problem of no start, 4mactic available, tcu no communication, my car has intermittent gear 1 STUCK issues especially on S mode. I was told this is a TCU conductor plate issue (to which i replaced it now)

is this a common failure on 724.0?
i know is common on 722.9