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:

    B2605 PNP switch
    Description BCM confirms the shift position with the following 4 signals. • CVT selector lever • P/N position switch • P position signal from IPDM E/R (CAN) • P position signal from TCM (CAN) DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B2605 is displayed with DTC U1000, first ...

    Passenger side
     Description Detects condition of the power window motor RH operation and transmits to power window and door lock/ unlock switch RH as pulse signal. Component Function Check 1. CHECK ENCODER OPERATION Does door glass RH perform AUTO open/close operation normally when operating power w ...

    Body sealing
    Description The following figure shows the areas which are sealed at the factory. Sealant which has been applied to these areas should be smooth and free from cuts or gaps. Care should be taken not to apply an excess amount of sealant and not to allow other unaffected parts to come into cont ...