Nissan Altima 2007-2012 Service Manual: U1000 can comm circuit

Description

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.

CAN Communication Signal Chart, refer to LAN-25, "CAN Communication Signal Chart".

DTC Logic

DTC DETECTION LOGIC

Diagnosis Procedure

1.PERFORM SELF DIAGNOSTIC

1. Turn ignition switch ON and wait for 2 seconds or more.

2. Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed? YES >> Refer to LAN-8, "CAN Communication Control Circuit".

NO >> Refer to GI-42, "Intermittent Incident".

    Component diagnosis
    ...

    U1010 control unit (can)
    DTC Logic DTC DETECTION LOGIC Diagnosis Procedure 1. REPLACE BCM When DTC U1010 is detected, replace BCM. >> Replace BCM. Refer to BCS-96, "Removal and Installation". ...

    Other materials:

    Condenser
    Removal and Installation for Condenser REMOVAL 1. Discharge the refrigerant. Refer to HA-32, "HFC-134a (R-134a) Service Procedure". 2. Remove the front fascia (coupe only). Refer to EXT-17, "Removal and Installation". 3. Remove the front grille (sedan only). Refer to ...

    Cooling fan
    Removal and Installation 1. Fan blade 2. Fan shroud and motor assembly REMOVAL 1. Drain engine coolant from the radiator. Refer to CO-12, "Changing Engine Coolant". CAUTION: Perform when engine is cold. 2. Remove air cleaner duct assembly. Refer to EM-25, "Removal and In ...

    On board diagnostic (OBD) system
    Trouble Diagnosis Introduction CAUTION: • Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connectors. • Do not attempt to repair, splice or m ...