Nissan Murano: Dtc/circuit Diagnosis / U1000 Can Comm Circuit

DTC Description

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-Nissan Murano vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability. Many electronic control units are equipped onto a Nissan Murano vehicle, and each control unit shares information and links with other control units during operation (not independently). 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.

DTC DETECTION LOGIC

When the ignition switch is ON, TCM cannot send the CAN communication signal continuously for 2 seconds or more.

POSSIBLE CAUSE

Harness or connector (CAN communication line is open or shorted)

FAIL-SAFE

Not changed from normal driving

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.

GO TO 2.

CHECK DTC DETECTION

With CONSULT

1. Start the engine and wait for at least 5 seconds.

2. Check the DTC.

Is “U1000” detected?

Go to Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

For the diagnosis procedure, refer to Trouble Diagnosis Flow .