Nissan Altima 2007-2012 Service Manual: 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 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-678, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

    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 excellen ...

    U1001 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 excelle ...

    Other materials:

    Inspection and adjustment
    ECM RE-COMMUNICATING FUNCTION Description Performing following procedure can automatically perform re-communication of ECM and BCM, but only when the ECM has been replaced with a new one (*1). *1: New one means an ECM which has never been energized on-board. (In this step, initialization ...

    Terminology
    SAE J1930 Terminology List All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new terms, new acronyms/abbreviations and old terms are listed in the following chart. ***: Not applicable ...

    Diagnosis and repair workflow
    Work Flow OVERALL SEQUENCE • Reference 1··· Refer to AV-289, "CONSULT - III Function (MULTI AV)". • Reference 2··· Refer to AV-424, "Symptom Table". DETAILED FLOW 1.CHECK SYMPTOM Check the malfunction symptoms by performing the following items. • Intervie ...