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OBD2 Pin Configurations and Protocols

The female 16-pin (2x8) J1962 connection is specified in the OBD2 specification as a standard, unified hardware interface. Under the OBD2 interface, there are five protocols in use, and it's generally able to estimate which one is in use based on the pins that are present on the J1962 connector Understanding OBD2 Pin Configuration Below is a comprehensive layout of the OBD2 pin configuration: ·        The pin configuration of the OBD2 16-pin diagnostic connection is often termed as a J1962 connector. ·        Pin 16 is linked to the vehicle's battery and provides electricity. ·        P ins 4 and 5 are used for grounding. ·        CAN Bus High and CAN Bus Low signals are coupled with pins 6 and 14, respectively. ·        The SAE J1850 protocol is used on pins 2 and 10, with pin 2 representing positi...
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What are the Different Software Services Available Under ISO 14229 UDS Protocol Stack?

Modern automobiles offer an OBD interface that allows a client or diagnostics tool (tester) to connect to the vehicle's communication system. With the help of UDS protocol, an external tester tool can access this system and retrieve vehicle diagnostic information. Diagnostic information can be accessed or retrieved using diagnostic software services. The UDS protocol stack comes with a number of diagnostic/fault identification services.  Embitel, as an automotive industry solution partner, provides multiple services specified under the UDS protocol stack as defined by ISO 14229 standard.   These services include vital functionalities such as security access, reading data by identifiers, routine control, data transfer, communication control etc. Let’s explore few of the most crucial software services and understand how they function There are Typically 6 Function Groups Under ISO 14229 UDS Protocol Stack that are Further Divided into Software Services: ·  ...
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