All vehicles and light trucks worked available to be purchased in the United States after 1996 are required to be OBD-II consistent. The European Union OBD enactment is to some degree progressively confounded.
An OBD-II agreeable vehicle can utilize any of the five correspondence conventions: J1850 PWM, J1850 VPW, ISO9141-2, ISO14230-4 (otherwise called Keyword Protocol 2000), and all the more as of late, ISO15765-4/SAE J2480 (an “enhance” of CAN). US vehicle makers were not permitted to utilize CAN until model year 2003, however as of model year 2008 and going ahead, all vehicles will utilize the CAN convention.
There are two kinds of analytic connection connectors (DLCs) characterized by SAE J1962 – Type An and Type B, appeared in Figures 2 and 3, separately. The principle contrast between the two connectors is in the state of the arrangement tab.
Area – According to J1962, Type A DLC “will be situated in the traveler or driver’s compartment in the region limited by the driver’s finish of the instrument board to 300 mm (~1 ft) past the vehicle centerline, appended to the instrument board and simple to access from the driver’s seat. The favored area is between the guiding section and the vehicle centerline.”
Type B DLC “will be situated in the traveler or driver’s compartment in the region limited by the driver’s finish of the instrument board, including the external side, and an envisioned line 750 mm (~2.5 ft) past the vehicle centerline. It will be joined to the instrument board and simple to access from the driver’s seat or from the Co-drivers situate or all things considered. The vehicle connector will be mounted to encourage mating and unmating.”
When in doubt, you can figure out which convention your vehicle is utilizing by taking a gander at the pinout of the DLC:
| Pin 2 | Pin 6 | Pin 7 | Pin 10 | Pin 14 | Pin 15 | Standard |
|---|---|---|---|---|---|---|
| must have | – | – | must have | – | – | J1850 PWM |
| must have | – | – | – | – | – | J1850 VPW |
| – | – | must have | – | – | may have* | ISO9141/14230 |
| – | must have | – | – | must have | – | ISO15765 (CAN) |
*Pin 15 (also called the “L-line”) is optional in newer vehicles that use the ISO9141-2 or ISO14230-4 protocols.
In addition to pins 2, 7, 10, and 15, the connector should have pins 4 (Chassis Ground), 5 (Signal Ground), and 16 (Battery Positive). This means that: