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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Automatic Transmission) >> DTC/Circuit Diagnosis >> DTC U0300: Can Communication Data >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONTROL UNIT 

    Check the number of control units replaced before detecting "U0300".

    Is the number of replaced control units one? 

    YES: Since the replaced control unit may be out of specifications, check the part number and specifications.

    NO: GO TO 2.

  2. INSPECTION CONTROL UNIT 

    With CONSULT 

    1. Remove one of the replaced control units.
    2. Install the previous control unit mounted before replacement.
    3. Turn ignition switch ON and wait 2 seconds or more.
    4. Perform "Self Diagnostic Results" in "TRANSMISSION".

      Is "U0300" detected? 

      YES: Turn OFF the ignition switch to check the other control units in the same method.

      NO: Since the removed control unit may be out of specifications, check the part number and specifications.

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