DTC U1000: Can Comm Circuit: Description

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

CAN communication is a multiplex communication system. This enables it to transmit and receive many communication signals at high speed by connecting control units with two communication lines (CAN-H and CAN-L).
Control units on the CAN network transmit signals with CAN communication control circuit in the control unit and receive only necessary signals from other control units for various controls. Refer to CAN COMMUNICATION SIGNAL TABLE .
CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.