Customer Problem: When i connected SD Connect C4 with my computer, it showed white 00 connection status at the bottom right corner. A message prompted “Initialization of diagnosis multiplexer failed.” Do i need to initialize the device?

These days we have some customers with Initialization of Diagnosis Multiplexer Failed Error for C3 C4 C5 Software after 09/2015V, today our engineer gave some tips to. Initialization of diagnosis multiplexer failed. Possible causes: The link between the diagnosis multiplexer and the diagnostic socket is interrupted. The link between the diagnosis multiplexer and the diagnostic unit is interrupted. The voltage supply at the diagnostic socket (circuit 30 and (or) circuit 31) is faulty. 1.The communication between the multiplexer and das xentry software is interrupted. 2.The connection between the multiplexer and the diagnostic socket has an open circult. MB Star C4 sd connect wireless connection IP address seted up is not correctly. 4.If there are no problems with connection and the IP setting, then it means the. Initialization of diagnosis multiplexer failed. Obdii365.com engineer working solution: Run an sd connect c4 firmware update: Go to C: Program Files Mercedes-Benz SDConnect Toolkit, change updateautomaticx, updatemanualx and updatespecicalx 3 files to updateautomatic, updatemanual and updatespecical (delete the x letter).

Initialization Of Diagnosis Multiplexer Failed C4 And Normal

Obdii.shop engineer solution:

The prompt indicates that you need to update MB SD C4 firmware, not initialization.

Here is the firmware update guide:

Step 1: Please prepare all the tools below:

Note: If your tool is MB SD C4 PLUS (Item No. SP100-E), you don’t need to install battery again, because the batteries have been installed in the device before delivery.

Initialization Of Diagnosis Multiplexer Failed C4 Panel

1). SDconnect C4 multiplexer which need to input the batteries

2). 6 units Ni-MH rechargeable batteries (size: AA, Voltage:1.2 V, Capacity: 1700mA above)

3).1 unit 108M WIFI card

4).Plum screwdriver, specification: T-20

Step 2: Take out the rubber

1).Use the T20 Plum screwdriver to take out the screws as below.

2).Take out the rubber as below

Note: No.1 is Batteries space, No.2 is WIFI card space, No.3 is SD card space

Step 3: Insert the rechargeable batteries

Initialization Of Diagnosis Multiplexer Failed C4 Code

1).Use the T20 plum screwdriver to take out the screws of batteries space fixation as below

2).Take out the fixation of batteries space. Pay attention to the battery polarity marked in the batteries space

3).Insert the batteries (Note the battery polarity)

4).Button on the Fixation of batteries space after inputting the rechargeable batteries

5).Use the T20 plum screwdriver to fix the screws of batteries space fixation

Inserting the batteries is finished!

Step 4: Install WIFI card

Note：If the MB SD C4 device you received has installed the Wifi card, please ignore this step.

1).Insert the WIFI Card into the WIFI Card Space

Please make the correct direction

2).Push it to make it totally connected

3).Cover the rubber and fix the screws to finish all the work

Initialization Of Diagnosis Multiplexer Failed C4 And 5

Step 5: Connect SD C4 Diagnostic tool to your computer via green Lan cable, and then connect SD C4 to your vehicle via OBD cable

Note: if OBD cable cannot connect, you can use OBD 12V power supply to instead of it.

Step 6: Open DAS software, go to C:programm filesSDconnect Toolkit folder to check if there are three files incl. Update_ automatic, Update_ manual and Update_ Special.

Note: If the file name is Update_ automaticx, Update_ manualx and Update_ Specialx, please change them to correct one.

Step 7: Restart your computer

Step 8: Start to update firmware

1).Right-click on the lower right corner of the computer, select administration, and then select Software update

2).Mainly upgrade three files, as shown below, upgrade order 02 -CSD-2-11.zip-> 01 -> 03

Then it can work again