Nissan Murano: Dtc/circuit Diagnosis / U0073 Communication Bus a Off

Nissan Murano (Z52) 2015-2024 Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f10j / Dtc/circuit Diagnosis / U0073 Communication Bus a Off

DTC Description

DTC DETECTION LOGIC

TCM communication blockage lasts for 2 seconds or more when turning ON the ignition switch. (Communication not established.)

DTC

CONSULT screen terms

(Trouble diagnosis content)
DTC detection condition
U0073

COMM BUS A OFF

(Control Module Communication Bus A Off)
Diagnosis condition When turning ON the ignition switch
Signal CAN communication
Threshold TCM communication blockage (Communication not established)
Diagnosis delay time Last for 2 seconds or more

POSSIBLE CAUSE

Harness or connector (CAN communication line is error)

FAIL-SAFE

  • Selector shock is large

  • Start is slow

  • Acceleration is slow

  • Lock-up is not performed

DTC Confirmation Procedure

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.

PERFORM DTC CONFIRMATION PROCEDURE

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

  2. Check the DTC.

Is “U0073” detected?

YES>>

Go to Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

For the diagnosis procedure, refer to Trouble Diagnosis Flow .

    Dtc/circuit Diagnosis

    ..

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