Nissan Altima 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.
Automatic speed control device
(ASCD)
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 ...
Cooling fan control
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 ...
Other materials:
Ecu diagnosis
TCM
Reference Value
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
*1: This circuit is not used.
*2: A circuit tester cannot be used to test this item.
Wiring Diagram - CVT CONTROL SYSTEM -
Coupe
Wiring Diagram - CVT CONTROL SYSTEM - Sedan
...
Speedometer and odometer
Speedometer
The speedometer indicates vehicle speed.
Odometer/Twin trip odometer
The odometer 1 and the twin trip odometer 2
are displayed below the Vehicle Information Display
when the ignition switch is placed in the ON
position.
The odometer records the total distance the vehicle
ha ...
Variable induction air system
Description
Power Valves 1 and 2
The power valves 1 and 2 are installed in intake manifold collector and used
to control the suction passage of
the variable induction air control system. They are set in the fully closed or
fully opened position by the power
valve actuators 1 and 2 operated b ...