Both VXDIAG Benz and MB SD C4 Support DOIP protocol, but how to test if DOIP works well? Here we will show you.
Connection:
MB SD C4>>OBD connector>> GODIAG GT100>>Multimeter
MB SD C4>>Ethernet cable>>Ethernet adapter>>PC
SD C4 connect power supply to fourth minus and to eighth pin to IP power supply 12V of multimeter
Test Method:
Turn on “enable Ethernet”.
Then 6v should appear on multimeter.
If it still has no 6.5v on eighth leg, it means the old type of C4 PCB board.
Find a diode.
We need to put supplement 54 with a letter and solder diode.
After changing components,
Click “DOIP ON”, then multimeter should display 12v;
Turn DOIP OFF, then multimeter should display no value.
Go to Mercedes center folder.
Turn on “enable Ethernet”, multimeter stays at 6.5v.
Done!
Credit to MBCoding.
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