Ducati Monster 797 OBD2 DDA diagnostic connector and communication

I created this simple guide to show you how to simply make a DDA OBD2 connector for your Ducati Monster (797 or older models with fuel injection).

The OBD2 connector (Ducati "DDA" connector) is located under the seat. So, the first step is to remove the seat, and locate the connector. This connector has 4 pins, and it is not the standard OBD2 connector available on most cars, which has 16 pins in total. Therefore, if you want to use an ELM327 or similar interfaces to communicate with your Ducati, you must make an adapter cable which wires the 4 pins of this DDA connector, to the standard OBD2 female connector (16 pins). Only 4 pins are needed:

  • +12V (Battery)
  • Chassis/Signal GND (0V)
  • CAN High
  • CAN Low

The following is the pinout of the Ducati DDA connector, on motorcycle side.

Ducati Monster 797 OBD2 DDA connector pinoutVehicle side has female connector, so you need to make a male one. The part numbers are visible below: 673-7868 (211CL2S1160) and 673-7789 (211PL042S0011) for the Delphi pins and plastic connector. All these parts are available on Aliexpress, RS Components or similar websites.

Take an OBD2 female connector (standard one) and connect the wires as following.

The final cable looks as the following. I connected an ELM327 Bluetooth on the OBD2 port. For the OBD2 16 pin cable and connector, you can find them online for 10 dollars: just cut and rewire.

Next step is to connect the OBD2 interface cable to the motorcycle, and then attach the ELM327 OBD2 to Bluetooth adapter, or similar ones.

ELM327 Bluetooth OBD2 Ducati Monster 797Using RealTerm or similar serial terminal programs (TeraTerm, etc.), I connected to the ELM327. First of all, you should pair the device: “OBDII”, password: 1234.

Ducati Monster 797 Bluetooth pairingThen, I sent some commands using RealTerm. “AL L1” sets line feeds ON. “AL H1” sets header ON. I tried to send some comments, like Service $01 $00, and it works (remember to turn Ignition ON).

If you are interested, please read the full guide here: Ducati_Monster797_OBD. And also, chech the standard PIDs of OBD2 diagnostic services at this Wikipedia link.

Author: Davide Cavaliere

I am an Italian Electrical Engineer graduated at Politecnico di Milano. My interests are motorcycles and cars, electronics, programming, Internet of Things, and Japanese culture.

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