obd2 scanner wont communicate

[tmedri]

Hi guys 3 different scanners power up when plugged into socket but cannot communicate . what should i be looking for on car that will cause this . the car is Mercedes ml 320 w164 cdi 2006
also where is the engine ECU .
thanks guys

 

[toolman1954]

Hi,
I would begin by checking the fuse ....looks like a 55 or 58. ...data link??
here is a fusebox guide ...... Mercedes-Benz ML-Class (W164) (2005-2011) Fuse Diagram • FuseCheck.com

ECU location ...try below

location of ECU on W164 year 2008 320 cdi

www.benzworld.org

as usual.......Google is your friend.

What scan tools are you using? I have never had a problem with the Icarsoft 2. Ensure the cable is pushed securely in the hole, perhaps give it a wiggle in case there is some corrosion on the pins. Also check that the correct vehicle is selected on your scan tool menu.

Steve

 

[markjay]

As above.

The OBDII 16-pin socket has live 12v feed at all times, on pin no. 16 (see below), protected by a 7.5A fuse. Check if you are getting 12v on that pin.

 

[E55BOF]

If the scanners power up when plugged in, it looks as though there's 12V on pin 16.

I've had the iCarsoft refuse to communicate with a car sometimes, but starting the engine has always solved the problem and got it working.

 

[tmedri]

Hi,
I would begin by checking the fuse ....looks like a 55 or 58. ...data link??
here is a fusebox guide ...... Mercedes-Benz ML-Class (W164) (2005-2011) Fuse Diagram • FuseCheck.com

ECU location ...try below

location of ECU on W164 year 2008 320 cdi

www.benzworld.org

as usual.......Google is your friend.

What scan tools are you using? I have never had a problem with the Icarsoft 2. Ensure the cable is pushed securely in the hole, perhaps give it a wiggle in case there is some corrosion on the pins. Also check that the correct vehicle is selected on your scan tool menu.

Steve

Hi i will be using icarsoft v3 dedicated Mercedes tool. Im waiting for the rear SAM and the rear fuse and relay holder to come back from the engineers before i can reconnect the battery and try the new scanner

 

[tmedri]

If the scanners power up when plugged in, it looks as though there's 12V on pin 16.

I've had the iCarsoft refuse to communicate with a car sometimes, but starting the engine has always solved the problem and got it working.

Trouble is the car wont start or even crank