The OBD-II specification calls for a specific hardware Socket. This is in the form of a female 16-pin (2 rows of 8 pins) J1962 connector similar looking to a EuroScart socket on modern AV equipment.
Pin out of diagnostic connector as defined by SAE J1962:
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- Bus positive Line of SAE-J1850
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- Chassis ground
- Signal ground
- CAN high (ISO 15765-4 and SAE-J2234)
- K line of ISO 9141-2 and ISO 14230-4
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- -
- Bus negative Line of SAE-J1850
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- -
- -
- CAN low (ISO 15765-4 and SAE-J2234)
- L line of ISO 9141-2 and ISO 14230-4
- Battery voltage
The assignment of unspecified pins is left to the vehicle manufacturer's discretion |
