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 through CAN communication line BASIC ASCD SYSTEM Refer to Owner's Manual for ASCD operating ins ...

    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 ...

    Other materials:

    M/T Oil
    Draining 1. Start engine and let it run to warm up transaxle oil. 2. Stop engine and remove the drain plug to drain the oil. 3. Install the drain plug with a new gasket to the transaxle case. Tighten the drain plug to the specified torque. Refer to TM-79, "Exploded View". CAUTIO ...

    Throttle valve closed position learning
    Description Throttle Valve Closed Position Learning is a function of ECM to learn the fully closed position of the throttle valve by monitoring the throttle position sensor output signal. It must be performed each time harness connector of electric throttle control actuator or ECM is disconne ...

    Control buttons
    The control buttons for the Bluetooth® Hands-Free Phone System are located on the steering wheel. PHONE/SEND Press the button to initiate a VR session or answer an incoming call. You can also use the button to interrupt the system feedback and give a command at once. See “List o ...