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".

    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:

    Clutch pedal
    Inspection and Adjustment 1. Check to see if the master cylinder rod end moves freely. It should not be bound by the clutch pedal. • If the rod end does not move freely, remove the rod end and check for deformation or damage on the rod end. Leave the rod end removed for step 2. 2. Check ...

    Line pressure test
    Inspection and Judgment INSPECTION Line Pressure Test Port Line Pressure Test Procedure 1. Inspect the amount of engine oil and replenish if necessary. 2. Drive the car for about 10 minutes to warm it up so that the CVT fluid reaches in the range of 50 to 80°C (122 to 176°F), then ins ...

    ECU Diagnosis
    ECM Reference Value VALUES ON THE DIAGNOSIS TOOL Remarks: ●  Specification data are reference values. ●   Specification data are output/input values which are detected or supplied by the ECM at the connector. * Specification data may not be directly related to the ...