Nissan Altima (L32) 2007-2012 Service Manual: Can communication
System 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.
Refer to LAN-25, "CAN Communication Signal Chart", about CAN communication for
detail.
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM via the CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating inst ...
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed
and battery voltage.
*2: This signal is sent to EC ...
Automatic speed control device
(ASCD)
Cooling fan control