Low resistance of the CAN line may be due to partial damage to the node device or cable connection.
In CAN communication, node devices are connected through CAN lines. In order to ensure the stability and accuracy of communication, it is necessary to add a certain resistance at each node to balance the signal.
When a node device or part of the cable connection is damaged, the resistance may be too low.
In practical applications, the resistance of 120 ohms is generally used, and if it is too low, it usually leads to communication failure or instability.
In order to avoid the problem of low resistance of the CAN wire, it is necessary to consider the balance of resistance and the reliability of the connection as much as possible during the design and installation of the equipment. At the same time, timely detection and maintenance is also very important.
If the resistance is too low, check the damaged node device or cable connection in time, and repair or replace it.
Check to see if there is a problem with the terminal resistance, if there is no problem, it is likely that the CAN transceiver is faulty