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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (Automatic Transmission -- G37 Coupe) >> DTC/Circuit Diagnosis >> DTC U0300: Can Communication Data >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  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-III 

    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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