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:

    P0452 Evap control system pressure sensor
    Description The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure increases. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING If DTC Confirmation Procedure has been previously condu ...

    Service data and specifications (SDS)
    Steering Wheel Steering Angle Steering Column STEERING COLUMN LENGTH TILT MECHANISM OPERATING RANGE Steering Gear STEERING OUTER SOCKET AND INNER SOCKET RACK STROKE Oil Pump Steering Fluid ...

    P0500 VSS
    Description The vehicle speed signal is sent to the combination meter from the “ABS actuator and electric unit (control unit)” by CAN communication line. The combination meter then sends a signal to the ECM by CAN communication line. DTC Logic DTC DETECTION LOGIC NOTE: • If DTC P050 ...