Nissan Juke F15. Manual - part 922

LAN

COMPONENT PARTS

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< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

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1.

Multi display unit

2.

A/C auto amp.

3.

Around view monitor control unit

4.

ABS actuator and electric unit (con-
trol unit)

5.

NAVI control unit

6.

ECM

7.

IPDM E/R

8.

TCM

9.

EPS control unit

10. Combination meter

11. BCM

12. Data link connector

13. Steering angle sensor

14. AWD control module

15. Air bag diagnosis sensor unit

JSMIA2078ZZ

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< SYSTEM DESCRIPTION >

[CAN]

SYSTEM

SYSTEM

CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM : System Diagram

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CAN COMMUNICATION SYSTEM : System Description

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Description

• CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle

multiplex communication line with high data communication speed and excellent error detection ability. Many

electronic control units are equipped onto a vehicle, and each control unit shares information and links with

other control units during operation (not independent). In CAN communication, control units are connected

with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with

less wiring. Each control unit transmits/receives data but selectively reads required data only.

• Termination circuits (resistors) are connected across the CAN communication system. When transmitting a

CAN communication signal, each control unit passes a current to the CAN-H line and the current returns to

the CAN-L line. The current flows separately into the termination circuits connected across the CAN commu-

nication system and the termination circuits drop voltage to generate a potential difference between the

CAN-H line and the CAN-L line. The system produces digital signals for signal communications, by using the

potential difference.

CAN Communication Line

JSMIA2079GB

JSMIA0450GB

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SYSTEM

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The CAN communication line is a twisted pair wire consisting of

strands of CAN-H (1) and CAN-L (2) and has noise immunity.

NOTE:

The CAN communication system has the characteristics of noise-resistant because this system produces dig-

ital 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 poten-

tial difference (2) between the CAN-H line and the CAN-L line is

insensitive to noise. Therefore, noise-resistant signals can be

obtained.

CAN Signal Communications

Each control unit of the CAN communication system transmits signals through the CAN communication con-

trol circuit included in the control unit and receives only necessary signals from each control unit to perform

various kinds of control.

• Example: Transmitted signals

JSMIA0382ZZ

JSMIA0383ZZ

JSMIA0584GB

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< SYSTEM DESCRIPTION >

[CAN]

SYSTEM

• Example: Received signals

NOTE:

The above signal names and signal communications are provided for reference purposes. For CAN communi-

cations signals of this vehicle, refer to 

LAN-30, "CAN COMMUNICATION SYSTEM : CAN Communication

Signal Chart"

.

CAN COMMUNICATION SYSTEM : CAN Communication Control Circuit

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CAN communication control circuit is incorporated into the control unit and transmits/receives CAN communi-

cation signals.

JSMIA0585GB

JSMIA0453GB

Component

System description

CAN controller

It controls CAN communication signal transmission and reception, error detection, etc.

Transceiver IC

It converts digital signal into CAN communication signal, and CAN communication signal into digital 
signal.