I have a unit that is currently not detecting engine data

I installed a normal Go9 unit & the 16 pin T-Harness supplied by GT in our 2025 517 Sprinter & can read engine data directly. Some vehicles have 2 obd ports, maybe it's simply plugged into the wrong one?

Silly question, but have you perhaps checked the vehicle using the VIN with the Vehicle Eligibility Check in MyAdmin (https://myadmin.geotab.com/vin-vehicle-lookup)?

Sounds trivial, but we found that some "versions" (like the Mercedes-Benz eCitan) is not fully supported.

Hope it helps

PC

Hello everyone,

Thank you for your attention. Due to the communication protocol used by Mercedes-Benz, we cannot connect to the OBD2 port. Therefore, Mercedes-Benz vehicles typically connect to an FMS port.

(Brand protocol: Mercedes-Benz uses proprietary CAN Bus protocols, which means a generic OBD2 scanner may not be able to "wake up" the ECU (Engine Control Unit).

For this reason, I'm asking for any information on the correct way to connect to the FMS to obtain engine data.

Regards