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Can Communication Line

WARNING: This page is about a different car, the 2015 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

The CAN communication line is a twisted pair wire consisting of strands of CAN-H (1) and CAN-L (2) and has noise immunity.

Fig 1: Identifying CAN Communication Line Twisted Pair Wire
G06934923Courtesy of NISSAN NORTH AMERICA, INC.
NOTE:

The CAN communication system has the characteristics of noise-resistant because this system produces digital signals by using the potential difference between the CAN-H line and the CAN-L line and has the twisted pair wire structure.

Since the CAN-H line and the CAN-L line are always adjacent to each other, the same degree of noise occurs, respectively, when a noise (1) occurs. Although the noise changes the voltage, the potential difference (2) between the CAN-H line and the CAN-L line is insensitive to noise. Therefore, noise-resistant signals can be obtained.

Fig 2: Potential Difference Between CAN-H Line And CAN-L Line Related To Noise
G06934924Courtesy of NISSAN NORTH AMERICA, INC.
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