Nissan Altima 2007-2012 Service Manual: U0101 Can comm circuit

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.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.

Is DTC detected? YES >> EC-148, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

Go to LAN-16, "Trouble Diagnosis Flow Chart".

    Power supply and ground circuit
    Diagnosis Procedure 1.INSPECTION START Start engine. Is engine running? YES >> GO TO 8. NO >> GO TO 2. 2.CHECK ECM POWER SUPPLY CIRCUIT-I 1. Turn ignition switch OFF and then ON ...

    U0140 Can comm circuit
    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 excellen ...

    Other materials:

    Precaution
    Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the dr ...

    Clutch master cylinder
    Removal and Installation REMOVAL 1. Remove the air cleaner and air duct. Refer to EM-19, "Removal and Installation" for QR25DE and EM- 123, "Removal and Installation" for VQ35DE. 2. Use one of the following methods to remove hose from master cylinder. • Drain clutch ...

    AV control unit
    Diagnosis Procedure 1.CHECK FUSE Check that the following fuses of the AV control unit are not blown. Are the fuses OK? YES >> GO TO 2 NO >> Be sure to eliminate cause of malfunction before installing new fuse. 2.CHECK POWER SUPPLY CIRCUIT Check voltage between AV control unit ...