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Nissan Sentra B18 (2020-2025) Service Manual: U0300-00 Can Communication Data

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U0300

00

CAN COMM DATA

(Internal Control Module Software Incompatibility)

Diagnosis condition

When the ignition switch is ON

Signal

CAN communication signal

Threshold

The data length transmitted from each control unit is shorter than the specified length and the status

Diagnosis delay time

2 seconds

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

  1. PREPARATION BEFORE WORK

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

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 10 V.

    >>

    GO TO 2.

  2. CHECK DTC DETECTION

    1. Start the engine and wait for at least 2 seconds.

    2. Check the DTC.

    Is "U0300-00" detected?

    YES >>

    Proceed to Diagnosis Procedure.

    NO-1>>

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

    NO-2>>

    Confirmation after repair: INSPECTION END

Diagnosis Procedure

Diagnosis Procedure

  1. 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.

  2. CONTROL UNIT CHECK

    1. Remove one of the control unit replaced.

    2. Assemble the old control unit before replacement.

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

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

    Is "U0300-00" detected again?

    YES >>

    Ignition switch OFF 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.

    U0287-00 Lost Communication (electric Oil Pump)
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