What is SAE J1962?

What is SAE J1962?

SAE standards documents on OBD-II J1962 – Defines the physical connector used for the OBD-II interface. J1850 – Defines a serial data protocol. There are 2 variants: 10.4 kbit/s (single wire, VPW) and 41.6 kbit/s (2 wire, PWM).

What is a J1939 connector?

The SAE J1939/13 Standard defines a standard connector for diagnostic purpose. It does allow access to the vehicle communication links. The connector is a Deutsch HD10 – 9 – 1939 (9 pins, round connector).

What is SAE J1939 standard?

Society of Automotive Engineers standard SAE J1939 is the vehicle bus recommended practice used for communication and diagnostics among vehicle components. SAE J1939 is used in the commercial vehicle area for connection and communication throughout the vehicle, with the physical layer defined in ISO 11898.

CAN J1939 vs CANopen?

CANopen theoretically allows up to 127 nodes (devices) in a network and J1939 supports up to 254 nodes but it is limited to 30 per segment. Due to the fixed bit rate the cable length for J1939 networks is limited 40 m, but using CANopen with 10 kbit/s cable up to 5000 m are allowed.

What is J1939 PGN?

In SAE J1939, the acronym PGN stands for Parameter Group Number and represents the identifier of a J1939 message. Every J1939 message has a unique PGN assigned to it by the SAE committee when the message is defined. The PGN identifier is encoded to allow for a maximum of 8,672 unique PGNs.

CAN 2.0 A vs B?

The difference between a CAN 2.0A and a CAN 2.0B message is that CAN 2.0B supports both 11 bit (standard) and 29 bit (extended) identifiers. Standard and extended frames may exist on the same bus, and even have numerically equivalent identifiers. In this case, the standard frame will have the higher priority.

Why is J1939 used?

J1939 is a higher-layer protocol based on Controller Area Network (CAN). It provides serial data communications between microprocessor systems (also called Electronic Control Units – ECU) in any kind of heavy duty vehicles.

What is K line in automotive?

Technical Information. The K-Line is a very low-speed single-wire serial communication system used on many motor vehicles and commercial vehicles. It is commonly used for the diagnostic connections between the Electronic Control Modules (ECMs) on the vehicle and the diagnostic equipment (scan tools and data loggers).