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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 123 (Hybrid Motor System (Diagnostic Trouble Codes (DTCS) P2122-P31FF And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC P3119: Motor System >> Diagnosis Procedure

Diagnosis Procedure

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

ELECTRIC_SHOCK Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:
  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.
  • Be sure to wear insulating protective equipment before beginning work on the high voltage system.
  • Never allow workers other than the responsible person to touch the vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.
  • Refer to HIGH VOLTAGE PRECAUTIONS .
CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Information. A malfunction may occur if this is not observed.

  1. PRECONDITIONING

    WARNING:

    Follow the instructions below before starting the procedure.

    1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE .
    2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT .

    GO TO STEP 2  .

  2. CHECK 3-PHASE HARNESS CONNECTOR INSULATION RESISTANCE

    1. Disconnect 3-phase harness connector of traction motor inverter.
    2. Check 3-phase harness connector insulation resistance. Refer to COMPONENT INSPECTION .
      3-phase harness connector
      Connector H21
    3. Check whether there are neither a water infiltration mark nor a defective seal in the 3-phase harness connector.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace the transmission assembly due to malfunction in the 3-phase harness connector. Refer to REMOVAL AND INSTALLATION .

  3. CHECK TRACTION MOTOR INSULATION RESISTANCE

    Check traction motor insulation resistance. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Perform INTERMITTENT INCIDENT .

    NO 

    Replace the transmission assembly due to malfunction in the traction motor. Refer to REMOVAL AND INSTALLATION .

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