Combosim1000 - SAE J1939/SAE J1979 ECU Simulator

At Deep Thought Systems we design, manufacture and supply automotive electronics simulators, like SAE J1939 simulator. This video is a simulation demo in the lab.

The SAE J1939 family of standards comprises a higher layer messaging protocol that works over CAN (Controller Area Network) at the physical layer. It supports both peer-to-peer and broadcast communication.

Time based updates happen at 20 milliseconds repetition rate, whereas the rate is significantly higher at higher Engine RPMs. Diagnostic messages (DMs) from various sub systems like emission control etc. are defined as per the Diagnostics Application Layer of the J1939 standard that includes services like periodic broadcasts of active Diagnostic Trouble Codes (DTCs), reading and clearing DTCs etc.

The J1939 simulator provides the design engineer with the ability to generate and vary individual parameters in order to check the response of the system under design/test. The required variations could be manually controlled using (rotary knob) potentiometers for continuously varying parameters. In dynamic mode, a linear ramp is created that sweeps the full range (0-100%) of the given parameter, in increasing steps of 1%.

ComboSIM1000 thus offers ECU and telematics product designers a proven means to quickly test and validate their design as per standards, well in advance of going for in-vehicle tests.

Our other offerings are CAN/J1939 logging, test/diagnostics, J1939 based displays and ECU manufacturing (EOL) test stations, thanks to our expertise in automotive protocols like CAN, OBD-II and J1939.