Solution of the MB Star C4 sd connect Multiplexer Cannot Access OBD2 Port

MB SD C4 is the most proffesional diagnostic tools for Benz cars and trucks.MB SD Connect C4 DAS/Xentry software have update to the 2016.03.One MB SD C4 customer have face the problem when he used the device.OBd2repair share you solution of the MB Star C4 sd connect Multiplexer Cannot Access OBD2 Port.

Mercedes Benz MB SD Connect C4 with Dell E6420 Laptop ready to use


Background:
MB SD C4 could not link to the car computer, MB SD Connect C4 offered a message, saying like “check cable connection / turn ignition on”. Then tried again, clone SDconnect compact 4 multiplexer cannot access OBD2 port


​Solution of the MB Star C4 Cannot Access OBD2 Port:

1) Check and record your MB SD Connect C4 multiplexer battery
2) Hook up a digital multimeter to set it to the direct current
3) Get two t-pins and plug them into the OBD socket at PIN 5 and PIN17 position
4) Put your positive lead to PIN16 and negative lead to PIN5.
5) Write down the voltage on the digital multimeter
6) Check if the voltage you from PIN16 and PIN 5 is same in step 1.
7) Find the light green wire with a blue tracer band of PIN10 of the OBDII connector.
8) If the voltage differs in step 1 and step 6, the problem is probably with your battery.
9) If the battery is damaged or broken, please replace your battery.


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