Mercedes A140 W168 ECU reset with Star Diagnosis

[omglol]

Hello!

I have changed the airflow sensor in A140 ECU. Now the ECU needs to be reset with Star Diagnosis ... unfortunately, my AVDI will only support CAN based vehicles with Star Diagnosis, so I need to take this vehicle to the dealer. Can somebody tell me exatly what needs to be done in Star Diagnosis to properly reset the ECU, so new airmass sensor will work correctly? A screenshot would be perfect, so can show it the Dealer. Thanks!

[Bazil_mb]

Swap 29f400

[omglol]

WTF? I replaced MAF sensor, not whole ECU ...

Does anyone else know what to do?

[MarkPRP]

Boot strapping


Mark

[genius76]

From here sorry for inferior site but what you ned reset, i first time hear that Bert Rowe's-Mercedes-Benz 'A'-class info. Mass Air Flow/ECU problems and the alternative to purchasing a new unit costing ?1200.00 + Fitting from Mercedes-Benz, Special discounts available to readers of this site on guaranteed repairs. (http://www.aclassinfo.co.uk/mypage.38.htm)

Re-installing the ECU/MAFS following repair.
Having had you MAFS repaired and re-set obviously it needs to be replaced. This is a very easy job and no skill is required with minimum tools.
Do not let MB confuse you by saying the ECU needs to be set up to the car , this is not the case as it is the original ECU and still retains the settings. The car will not have be run during the period the MAFS was off and so no problems should be encountered when the unit is replaced However having fitted and reconnected the battery. (Turn on the ignition on All lights/icons will be dispayed on the instrument cluster) and let the car stand for a minute or so, this will allow the ECU to re-establish contact with all the various components on the car.
There will be a sticker attached top your ECU /MAFS outlining this procedure. This action on your part also makes it less likely that the Engine management light will remain lit when the engine is started.
Should that be the case you will need to contact a Garage with a diagnostics tool to delete the light, NO other work is required by the garage.
If you have your own diagnostics tool, then simply delete the fault code and the light should extinguish.
However if you used 'ECU Testing' for your repair they will have deleted the fault code from your ECU as part of the repair service.
I cannot speak for other companies
Allow the car a couple of days of running to really settle down after re-installing the repaired ECU/MAFS unit. http://www.aclassinfo.co.uk/W168/DSC07414.JPG

Re-coding of the unit unlike a New MB unit is not necessary as the ECU/MAFS is being re-fitted to the same car. But please read the information above and also please remember when re-fitting the car's battery to turn the lighting switch to at least side lights, this reduced the spike of power reaching the ECU. Remembering to turn them back OFF after having reconnected, also remember the re-set your windows and the ABS/ESP.
Reset ESP/ABS & Reset Electric Windows (http://www.aclassinfo.co.uk/mypage.35.htm)

Note. If your car is pre 2000 it may well be that only a garage with 'Star' Diagnostics equipment can clear the fault from the ECU memory. Even if the light does extinguish the fault code for the defective ECM will stay logged until it is cleared. It will have no effect on the running of the car.
Just one final point the time taken to turn your repaired unit round by 'ECU Testing' is 3 to 4 days, it takes seven daysminimum for Mercedes-Benz parts to obtain your New combined ECM as it has to be coded to your car before delivery and comes from Germany, so there is no time advantage in buying a new unit.