Nissan Murano: Dtc/circuit Diagnosis / U0300 Can Communication Data

Nissan Murano (Z52) 2015-2024 Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f10j / Dtc/circuit Diagnosis / U0300 Can Communication Data

DTC Description

DTC DETECTION LOGIC

When the ignition switch is ON, the data length transmitted from each control unit is shorter than the specified length and the status continues for 2 seconds or more.

DTC

CONSULT screen terms

(Trouble diagnosis content)
DTC detection condition
U0300

CAN COMM DATA

(Internal Control Module Software Incompatibility)
Diagnosis condition When the ignition switch is ON
Signal CAN communication data
Threshold The data length transmitted from each control unit is shorter than the specified length and the status
Diagnosis delay time Continues for 2 seconds or more

POSSIBLE CAUSE

Control unit other than TCM

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.

CHECK DTC DETECTION

With CONSULT

  1. Start the engine and wait for 5 seconds or more.

  2. Check the DTC.

Is “U0300” 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

CONTROL UNIT CHECK

Check the number of control units replaced before “U0300” is detected.

Is one control unit replaced?

YES>>

The specification of the control unit replaced may be incorrect. Check the part number and the specification.

NO>>

GO TO 2.

CONTROL UNIT CHECK

With CONSULT

  1. Remove one of the control unit replaced.

  2. Assemble the old control unit before replacement.

  3. Turn ignition switch ON, and wait for 2 seconds or more.

  4. Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “U0300”detected?

YES>>

Turn OFF the ignition switch and check other control units in the same manner.

NO>>

The specification of the control unit removed may be incorrect. Check the part number and the specification.

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