CAN-bus, checking: Notes

Function 

The Diesel Direct Fuel Injection Engine Control Module J248 communicates with all control modules capable of data bus via CAN data bus.

Data bus-compatible control units are connected together via two data bus wires twisted together (CAN high and CAN low) and exchange information (messages). Information not available in the data bus will be recognized as a fault by the engine control unit as well as other CAN data bus control units.

The data bus requires a matching resistor to function fault free. This central matching resistor is located in the Diesel Direct Fuel Injection Engine Control Module J248.