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

DescriptionCAN (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
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    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:

    Disassembly and assembly
    DOOR MIRROR Exploded View 1. Door mirror cover 2. Mirror housing assembly 3. Mirror glass and holder Disassembly 1. Turn the mirror glass surface upward. 2. Apply a protective tape (A) to mirror housing. Insert a suitable tool (B) into the concave gap between the mirror holder (1) and ...

    Self-diagnosis function
    Diagnosis Description SELF-DIAGNOSIS SYSTEM The self-diagnosis system is built into the front air control to quickly locate the cause of malfunctions. SELF-DIAGNOSIS FUNCTION The self-diagnosis system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to applicable se ...

    P0461 Fuel level sensor
    Description The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combination meter sends the fuel level sensor signal to the ECM via the CAN communication line. It consists of ...