Introduction
Ethernet networks in vehicles allow certain vehicle systems to transmit larger amounts of data at faster speeds compared to CAN networks.
As of 2023, select vehicle diagnostics are primarily available through the Diagnostics over Internet Protocol (DoIP) using Ethernet networks rather than traditional CAN networks.
Currently, the 16-pin T-harness (HRN-BM16T22) has the 2-pin Molex connectors for Ethernet (pins 3 and 11) connected by default for most vehicles. Select vehicles may require an Ethernet bypass.
The table below specifies the vehicles that require an Ethernet bypass.
| OEM or Vehicle Make | Vehicle Model and Year |
| BMW | All models |
| Ford | Capri (BEV) 2025+ Explorer (BEV) 2024+ |
| Goupil | G4 (2016+) G5 (2020+) G6 (2020+) |
| Hyundai | Kona 2022+ |
| Iveco | Eurocargo III 2023+ |
| Jaguar | E-Pace 2022+ F-Pace 2022+ F-Type 2022 to 2024 |
| Land Rover or Range Rover | All models 2023+ |
| MAN | TGM 2020+ TGS 2020+ TGX 2020+ |
| Mercedes Benz | EQA EQC EQE EQS EQV e-Sprinter e-Vito |
| Range Rover | All Models 2023+ |
| Renault Trucks | All models 2025+ |
| Scania Trucks & Busses | All models 2024+ |
| Volvo Buses (Europe) | All models |
| Volvo Trucks (Europe) | All models 2016+ |
| Volvo Trucks (North America) | VNL (BEV) 2024+ VNR (BEV) 2024+ |
| VW Audi Group (VAG) Vehicles | Audi Q4 eTron (2022 and newer) Audi Q5 eTron (2022+) SEAT / Cupra Born (2022+) SEAT / Cupra Tavascan (2024+) Skoda Elroq (2024+) Skoda Enyaq Coupe’ (2023+) VW ID Buzz (2023+) VW ID.3 (2022+) VW ID.4 (2022+) VW ID.5 (2022+) VW ID.6 (2022+) VW ID.7 (2023+) |
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For an Ethernet bypass, disconnect the 2-pin Molex connectors attached to the 16-pin T-harness (HRN-BM16T22)
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Failure to disconnect the Molex connector may result in issues when performing non-Geotab software updates.
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WARNING! All in-vehicle devices and related cabling must be securely fastened and kept clear of all vehicle controls, including gas, brake and clutch pedals. To ensure all devices and cabling remain securely attached, inspect devices and cabling on a regular basis.
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Loose cabling or devices may impede the use of vehicle controls, resulting in unanticipated acceleration, braking, or other loss of vehicle control, which could lead to death or serious personal injury. Upon sudden acceleration or deceleration, improperly fastened, in-vehicle devices may detach and impact operators, which may cause injury.
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