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The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams. [1] Prior to 1996, many OBD-I data link connector's were in the engine compartment, usually near the ...
This OBD-II came in two models OBD-IIA and OBD-IIB. OBD-II standardization was prompted by emissions requirements, and though only emission-related codes and data are required to be transmitted through it, most manufacturers have made the OBD-II Data Link Connector the only one in the vehicle through which all systems are diagnosed and ...
To test OBD-II scanners, we pulled a 2005 Toyota Corolla into the Car and Driver garage. We then set to work manufacturing a check-engine light (CEL) by unplugging the mass-air-flow sensor.
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections .
OnStar Link is a miniature GPS receiver and 4G LTE IoT interface that plugs into the vehicle's OBD-II connector. It can provide most traditional OnStar services, including a WiFi hotspot (additional data plan required), though not Stolen Vehicle Slowdown, Hands-Free Calling, Turn-by-Turn Navigation, or Send-to-Navigation. [ 22 ]
OBD-2 (16 pin) Additionally, many major car manufacturers use their own proprietary vehicle bus standards, or overlay proprietary messages over open protocols such as CAN. J1939 (9 pin) Commercial class vehicles have Type-I or Type-II connectors that support CAN based communication per the SAE J1939 protocol.
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