SD Connect C4 DoIP PCB rework like Xentry Connect C5

About: How to rework a cloned MB star diagnosis SD connect C4 PCB to support DoIP, working as well as Xentry Connect C5


Details included:

What is DoIP?

What’s the advantage of DoIP?

Why DoIP is applied to automotive / cars?

What is a SDconnect DoIP device?

What is a DoIP cable?

How to rework clone SDConnect C4 PCB for DoIP diagnosis?



What is DoIP?


Diagnostic Communication over Internet Protocol


Short and simple: “DoIP is the packaging of diagnostic messages

in Ethernet frames for communication of a diagnostic tester with a vehicle”

  • DoIP is a standardized diagnostic transport protocol according to

ISO 13400 (see the note below)

  • DoIP is used in combination with the standardized diagnostic protocol

UDS (ISO 14229-5: UDSonIP)

  • Services of UDSonIP are identical to UDSonCAN
  • DoIP with Ethernet 100 Base-TX instead of CAN enables substantial

higher bandwidth

  • Vehicle access with DoIP is backwards compatible using discretionary

pins of the existing diagnostic connector

  • DoIP enables easy integration into various network structures,

even with WLAN



Note:  ISO 13400

ISO 13400-1:2011 describes the general use cases and communication scenarios which are covered by an Internet Protocol-based vehicle communication standard. Each use case drives specific communication capabilities of the vehicle communication interface, for instance in order to be interoperable in an existing computer network.

The diagnostic communication over Internet Protocol (DoIP) protocol supports the standardized service primitive interface as specified in ISO 14229-2.

The descriptions in ISO 13400-1:2011 cover different application layer implementations, such as:

enhanced vehicle diagnostics (system diagnostics beyond legislated functionality, non-emissions-related system diagnostics);
WWH-OBD (World-Wide Harmonized On-Board Diagnostics) as specified in ISO 27145-2 and ISO 27145-3.


What’s the advantage of DoIP?


Performant handling of huge data volumes

Time-saving at ECU Flash Programming

Cost-efficient because no VCI is necessary

Simple integration to IT Infrastructure

Flexible use because of standardized communication

Integrated with other standards for vehicle diagnosis

Future-proof technology enables various use cases


Why DoIP is applied to automotive / cars?


Increasing interconnection of vehicles and their environment

Driving assistance and infotainment systems cause huge data volume

Increasing time for flash programming at production line and after-sales service

DoIP as a performant and flexible vehicle access



What is a SDconnect DoIP device?


SDconnect DoIP devices for diagnosis of the model 222 S-Class have “SDconnect DoIP” on the model plate of the device (system number 170000 or higher). SDconnect DoIP includes an Ethernet switch, which switches the TCP/IP messages in the event of DoIP diagnosis to the vehicle side.


DoIP diagnostic tool for Benz:

SD connect C4 genuine (the clone need rework)

DoIP Xentry Connect C5, clone or genuine


What is a DoIP cable?

It’s a cable used to updated to DoIP with SD connect C4 clone.


How to rework SDconnect C4 for DoIP diagnosis?


The difference between DoIP and non-DoIP is pcb with Ethernet switch or not.


For SDConnect C4 china clone: rework and update to DoIP


You need:

Here is a parts kit to upgrade your SDConnect to DoIP:

DoIP piggyback board, power board and new DoIP cable.
If your SDConnect is china made you have to solder one missing connector.



What has been done:

Keyboard replaced
Side metal covers replaced
Top plastic cover replaced
Battery case with sensor and battery lock replaced
Full set of screws replaced

LCD board replaced
SDCard replaced
Connectors board replaced
LAN connector replaced
DoIP piggyback board added

Processor board
MPC processor replaced
C161 processor replaced
PIC replaced
Full set of RAM(6 chips) replaced
Full set of ROM(4 chips) replaced
PHY LAN controller replaced
PCMCIA slot replaced
20pin aux connector added
SD slot added
Some minor improvements, resoldering, cleaning etc.

Relay board
Can chokes added
All capacitors replaced
Main power regulators and inductors replaced
Some minor improvments, resoldering, cleaning etc.


Done! And your SD connect C4 DoIP now.



Credit to Anturage who made such great job. Note that experienced tech is required to PCB rework; otherwise, you would damage your device- TRYING ON YOUR OWN RISK.


Also, you have another way for W222 DoIP diagnosis, that is: go for Xentry Connect C5. No matter it’s original or not, it has good compatibility of DoIP diagnosis.