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 |
| Hyundai | Kona 2022 and beyond |
| Iveco | Eurocargo III 2023 and beyond |
| Jaguar | E-Pace 2022 and beyond F-Pace 2022 and beyond F-Type 2022 to 2024 |
| Land Rover or Range Rover | All models 2023 and beyond |
| MAN | TGM 2020 and beyond TGS 2020 and beyond TGX 2020 and beyond |
| Mercedes Benz | EQA EQC EQE EQS EQV e-Sprinter e-Vito |
| Volvo Buses (Europe) | All models |
| Volvo Trucks (Europe) | All models |
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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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