What is GODIAG GT108? How to Use?

What is Godiag GT108?

Godiag GT108 is a new Godiag brand product in 2023 and was released at godiagshop.com this week. It’s a super OBDI-OBDII universal conversion adapter for cars, SUVs, trucks, tractors, mining vehicles, generators, boats, motorcycles, individual ECU control units, etc. It can convert the OBDI diagnostic interface into standard OBDII diagnostic interface through DIY wiring interface, convenient for car maintenance personnel to connect to OBDII diagnostic programming equipment for data streams reading, fault codes diagnosis, programming, activation and coding…
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What is the specific feature of Godiag GT108 Converter?

1.DIY wiring, it can be converted to OBDII according to the car diagnostic interface.

Because the definitions of diagnostic interfaces in different regions are inconsistent, the popular conversion cables and adapters in the market cannot use different definitions of diagnostic interfaces. GODIAG GT108 Super OBDI-OBDII Adapter can be used by maintenance engineers to connect according to their own needs.

2.The device has reverse connection protection.

If the power supply is connected wrong, the device will not burn out, and it will not cause harm to the OBDII diagnostic programming device.

3.Independent GND4, GND5

It is more suitable for judging the problem of poor grounding of some control units.

4.Analog IGN switch.

Press the IGN switch, the corresponding port outputs ING VCC

5.Power indicator, GND4, GND5 switching indicator, IGN switching indicator.

6.DIY the way to lock the wire.

Equipped with different diagnostic interface cables, ECU cables, and locking screwdrivers.

7.Truck & Car Diagnostic Interface Connection Jumper Kit

Different configurations of wiring kits are different, please purchase according to maintenance needs.


How to Use GT108?

Step 1:

Find the definition of the diagnostic interface (find the maintenance manual of your own vehicle, or search online.), or see the definition diagram of the corresponding diagnostic interface of the Godiag GT108 Manual.

For example:

Audi VW Skoda Seat/ BMW/ Ford/ Mazda PIN

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Mercedes- Benz 38 PIN

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Step 2:

According to the interface definition, find out the connection line needed by your car, and connect to the GT108 adapter according to the definition. (Use a screwdriver to lock the terminal.)

Step 3:

Connect the connected diagnostic cable to the vehicle OBD1 diagnostic interface according to the definition. (Connect GND 4 or GND5 first, and then connect BAT+. If the power cable is connected correctly, the POW light of the GT108 host will light up. If the vehicle diagnostic interface does not have power, please connect the car battery to the DC power connector of GT108 with the battery cable. If the vehicle needs the ignition signal, connect the O-IGN line, and press the IGN switch, the corresponding IGN light will light up, and the O-IGN line will output the ignition power signal.)

Step 4:

Connect the communication line CAN or K-line to the diagnostic interface. (Note: If it is the truck diagnostic software added by the car diagnostic equipment, you need to buy a GT106 24V to 12V adapter.)

Step 5:

Connect the diagnostic device to start diagnosing the vehicle.


If you cannot find the definition for your own vehicle diagnostic interface, you can first find out the power supply of the diagnostic interface. First use the black battery clip on the battery connection cable to connect the negative pole of the battery, and then use the BAT+ line to connect to the diagnostic interface to find the power supply. You can also use a multimeter to find the diagnostic interface power supply. The definition of the diagnostic interface can also be judged by the GT101 Pirt Electric Circuit Tester device.

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Godiag GT108 Connect Diagram:

Car Connection

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Truck Connection

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Truck Connection with Godiag GT106

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Motorcycle Connection

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Mine Vehicles, Tractors, Boats and Generators Connection

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ECU Connection

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GODIAG GT108 Super OBDI-OBDII Universal Conversion Adapter:



Official GODIAG OBD2 Tool Online Shop