In this article & video we will be Coding & Programming on the 7G transmission. See part 4 for the remainder of the procedure, filling the transmission with fluid.

Mercedes-Benz 722.9 transmissions, also known as the 7G tronic, have been in production from model year 2003 to present. This 7 forward speed transmission with 2 reverse gears has been known to have some common problems that require servicing of the internal, valve body and ECU electrics plate. Please be aware that the ECU plate is a theft deterrent part on vehicles fitted with this 7G transmission, and a locksmith license (LSID) will be required when purchasing Theft Relevant Parts (TRP).

When a fault occurs in the ECU electronics plate also known as a conductor plate, fault codes for the Turbine Speed Sensor may be present along with symptoms like; improper shifting, Limp Home Mode all accompanied by a malfunction indicator lamp (MIL). For a complete description and list of possible fault codes please refer to our help document or contact support.

  • Error Code 0717 – The signal from component Y3 / 8n1 (turbine speed sensor (VGS)) is unavailable.
  • Error code 0718 – The component Y3 / 8n1 (turbine speed sensor (VGS)) is defective.
  • Error code 2767 – The signal from component Y3 / 8n2 (Internal speed sensor (VGS)) is unavailable.
  • Error code 2768 – The component Y3 / 8n2 (Internal speed sensor (VGS)) is defective.

Attach a suitable vehicle power supply to the vehicle.

Working at the right side of the transmission at the electrical connector, plug in the old part ECU electrics plate.

Then attach a ground strap from the ECU electrics plate to chassis ground.

Next the data is read using your iSCAN.

Tap Diagnostics

Tap Euro

Tap Mercedes-Benz

Tap Coding

The vehicle data will be read.

Tap System Select

Tap Power Train System

Tap Transmission ETC

Tap ECU Replacement

You will be guided through the following steps: Initialization of the module, SCN Coding and adaptations.

Tap Enter to continue

If you have the old ECU electrics, you will be able to read the old data and then program the new ECU electrics.

Tap to select the option that matches your situation. In this example we will select Yes, the original ECU exists.

Tap Enter to continue

Once the confirmation message appears, you can connect the electrical connector to the new ECU electrics plate.

Tap Enter to continue

Coding will begin

Next you will write the EHS number and write the shift adaptation value.

You will be asked if you are also replacing the valve body. In this example we are not, select No, the valve body has not been replaced.

Tap Enter to continue

Shift adaptation values will be written

Tap Enter to begin programming

Tap Enter to continue

Confirm the EHS number change is correct, Tap your selection. In our case it is correct, so we will Tap Yes.

You will receive a message to confirm the process is complete.

Tap Enter to continue

Perform the following adaptations, Detach transport protection and personalization. Teach in of selection range sensor.

Tap Enter to continue

Read and confirm message. For our vehicle we do want to carry out the teach in procedure.

Tap Enter to detach transport protection

You will receive a success message

Tap Enter to continue

Read and confirm message. For our vehicle we do want to perform ECU personalization.

You will receive a success message

Tap Enter to continue

 Read and confirm message. For our vehicle we do want to perform the teach-in of the selection range sensor.

You will receive a message describing the selection range teach-in process.

Tap Enter to continue

Follow the on-screen prompts and select the noted transmission gear.

Coding, programming and adaptations are now complete. Tap Exit.

iSCAN makes complex functions simple. Check our other videos and articles for more helpful tips and procedures for Mercedes-Benz vehicles.

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