SAE J1939 Multiple Operator and Information Graphical Displays

Date: 12/9/2013

Code of Federal Regulations – Electronic Code of Federal Regulations

CFR 40 Protection of Environment, Section 86.1806-04 On-Board Diagnostics, PART 86 Control of Emissions from New and In-Use Highway Vehicles and Engines Regulations

Control of Emissions from New and In-Use Highway Vehicles and EnginesUS Environmental Protection Agency, EPA is called a regulatory agency because Congress authorizes EPA to write regulations that explain the technical, operational, and legal details necessary to implement laws. Regulations are mandatory requirements that can apply to individuals, businesses, state or local governments, non-profit institutions, or others.

Title 40, Code of Federal Regulations (40 CFR)

Regulations are codified annually in the U.S. Code of Federal Regulations (CFR). Title 40: Protection of Environment is the section of the CFR that deals with EPA's mission of protecting human health and the environment.

On-Board Diagnostic (OBD) System

The OBD system shall provide for standardized access and conform with the following Society of Automotive Engineers (SAE) standards and/or the International Standards Organization (ISO) standards. On-board diagnostics, or OBD, is an automotive term referring to a vehicle's self-diagnostic and reporting capability. OBD systems give the vehicle owner or repair technician access to the status of the various vehicle sub-systems. The amount of diagnostic information available via OBD has varied widely since its introduction in the early 1980s versions of on-board vehicle computers. Early versions of OBD would simply illuminate a malfunction indicator light or "idiot light" if a problem was detected but it would not provide any information as to the nature of the problem. Modern OBD implementations use a standardized digital communications port to provide real-time data in addition to a standardized series of diagnostic trouble codes, or DTCs, which allow one to rapidly identify and remedy malfunctions within the vehicle.

Society of Automotive Engineers (SAE) J1939 Diagnostics

Engine Control Unit, ECU’s may send or receive Diagnostic Messages (DMs). If an ECU is capable of diagnostic messaging, each possible fault in the node will correspond with a Diagnostic Trouble Code (DTC).

Society of Automotive Engineers (SAE) J1939 Message Transmission

Nearly all messages specified by J1939 are intended to be “broadcast” or sent to every node on the bus, regardless of whether each individual node can actually use the information. An advantage of this sort of communication is that is no need for request messages. Broadcasting messages also makes it easy to accommodate additional ECUs (with additional addresses) as they are added to the network.

Society of Automotive Engineers (SAE) J1939

SAE J1939 is a high-level protocol that defines how communication between nodes or electronic control units and diagnostics occur on a vehicle bus. It was originally developed by the Society of Automotive Engineers (SAE) in the US for car and heavy duty truck applications. Currently the J1939 standard is used worldwide by on and off highway heavy duty truck and machinery companies. J1939 is commonly used for communications throughout a vehicle or machine. Heavy-duty vehicles may conform to the specifications of the SAE J1939 series of standards (SAE J1939-11, J1939-13, J1939-21, J1939-31, J1939-71, J1939-73, and J1939-81).

  • SAE J1939-11—Physical Layer—250K Bits/s, Shielded Twisted Pair
  • SAE J1939-13—Off-Board Diagnostic Connector
  • SAE J1939-15—Reduced Physical Layer, 250K Bits/s, Un-Shielded Twisted Pair (UTP)
  • SAE J1939-21—Data Link Layer
  • SAE J1939-31—Network Layer
  • SAE J1939-71—Vehicle Application Layer
  • SAE J1939-73—Application Layer - Diagnostics
  • SAE J1939-81Network Management Protocol

Companies that use J1939 include, VOLVO Trucks, MACK, John Deere, Caterpillar, Detroit Diesel, Nissan Diesel, Kubota, Freightliner, Dongfeng, Sinotruck, Daimler Trucks, Navistar, Chery Auto, SAIC MOTOR, SINO Truck, China National Heavy Duty Truck Group Corp., Ltd, Dong Feng Motor, King Long and Shannxi Automobile.



CAN Controller Architecture Optimized for SAE-J1939 Applications

An electronic module in a J1939-compatible network requires to be equipped with a CAN protocol controller, which might be integrated on the main CPU or is attached to the CPU as a separate chip. Besides the fundamental functions required transmitting and receiving CAN-compatible messages, the CAN hardware can support the CPU effectively, if the typical communication structure of J1939 was respected during the design of the CAN controller. It is shown that the CPU's management of, especially, received messages can be accelerated, if the CAN controller's architecture reflects the internal structure of the J1939 recommendations.

Critical Information Graphical Display and Rugged Reliability

SAE J1939 Display ISO 11783 ISOBUS display ISO Bus ISOBUS Virtual TerminalAIS comprehensive range of design for manufacturability services and integrated J1939-based ISO 11783 virtual console (VC), virtual terminal (VT), and ISOBUS Terminals design. AIS’s in-house design for manufacturability services and capabilities optimize all manufacturing functions including: fabrication, assembly, test, procurement, shipping, delivery, service, and repair. Their use of proven methodologies for design for manufacturability and concurrent engineering assures the best possible cost, quality, reliability, regulatory compliance, safety and time-to-market for heavy duty vehicle and machinery customers.

These in-vehicle displays and systems are designed to accommodate the needs of fleet management and intelligent vehicle requirements and withstand harsh vibration and electromagnetic conditions. The ability to consistently provide the critical information you need under extreme conditions of heat or cold, vibration, and shock.  Our family of vehicle displays provides a range of solutions for presenting monitoring information in a vehicle's cab, utilizing full-color LCD readouts and analog gauges.

Off Road In-Vehicle-J1939-based ISO 11783 Virtual Console (VC), Virtual Terminal (VT), and ISOBUS Terminals- Standards & Solutions

  • ISO EN DIN 13849: Safety of machinery -- Safety-related parts of control systemsISO11783 a Standardized Tractor – Implement Interface
  • IEC EN 61508: Functional safety of Electrical/Electronic/Programmable Electronic Safety -- Related Systems (E/E/PE, or E/E/PES)
  • ISO 25119: Tractors and machinery for agriculture and forestry -- Safety-related parts of control systems
  • ISO DIS 11783: Tractors and machinery for agriculture and forestry -- Serial control and communications data network
  • SAE J1939: Networks: Industrial protocols like Modbus, Profibus, CANOpen
  • SAE J1455: Environmental practices for electronic equipment design in heavy-duty vehicle applications
  • SAE J1113: Electromagnetic compatibility measurement procedure for vehicle components--part 13: immunity to electrostatic discharge
  • Military Standard MIL-STD-810: Tested to the MIL-STD-810 standard methodology for a range of extreme conditions including drops, shocks, vibration, humidity, altitude, rain, dust and sand-resistance, temperature extremes and thermal shock
  • Military Standard MIL-STD-461: Tested to the MIL-STD-461 standard methodology for Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC)
  • Environmental ratings for enclosures based on NEMA 4, 4X, IP65, IP67 Type designations: To provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water, hose-directed water, and corrosion