Nissan Altima 2007-2012 Service Manual: U1010 control unit (CAN)

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 malfunction 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 and CAN-L) 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

NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.CHECK DTC DETECTION

1. Turn ignition switch ON.

2. Start engine and wait for at least 6 seconds.

3. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Follow the procedure “With CONSULT-III”.

Is “U1010 CONTROL UNIT (CAN)” detected? YES >> Go to TM-303, "Diagnosis Procedure".

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

Diagnosis Procedure

1.CHECK CAN COMMUNICATION CIRCUIT

1. Turn ignition switch ON and start engine.

2. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Is “U1010 CONTROL UNIT (CAN)” indicated? YES >> Go to LAN section. Refer to LAN-25, "CAN System Specification Chart".

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

    U1000 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 ...

    P0703 stop lamp switch
    Description BCM detects ON/OFF state of the stop lamp switch and transmits the data to the TCM via CAN communication by converting the data to a signal. DTC Logic DTC DETECTION LOGIC DTC CONF ...

    Other materials:

    Vin registration
    Description VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced. NOTE: Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M) VIN REGISTRATION : Special Repair Requirement 1.CHECK VIN Check th ...

    Booster seats
    Precautions on booster seats WARNING If a booster seat and seat belt are not used properly, the risk of a child being injured in a sudden stop or collision greatly increases: – Make sure the shoulder portion of the belt is away from the child’s face and neck and the lap portion of the b ...

    B2602 shift position
    Description BCM confirms the shift position with the following 2 signals. • CVT selector lever • Speed signal from meter DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B2602 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to SEC-235, "DTC L ...