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Home >> Infiniti >> 2017 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 229 (Heater & Air Conditioning Control System (DTC/Circuit Diagnosis) (Hybrid)) >> DTC/Circuit Diagnosis >> Electric Compressor Insulation Resistance Check >> Component Inspection

Component Inspection

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
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 ELECTRIC COMPRESSOR INSULATION RESISTANCE

    1. Disconnect high voltage harness connector from electric compressor.
    2. Check the insulation resistance of the electric compressor with an insulation resistance tester.
      G07084718Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION:
      • Unlike the ordinary tester, the insulation resistance tester applies 500V when measuring. If used incorrectly, there is the danger of electric shock. If used in the vehicle 12V system, there is the danger of damage to electronic devices. Read the insulation resistance tester instruction manual carefully and be sure to work safely.
      • Use 500V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until the value becomes stable.
    + - Resistance
    Electric compressor
    Terminal
    1 Aluminum part on side of electric compressor 1 MΩ or more
    2

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Replace electric compressor. Refer to REMOVAL AND INSTALLATION .

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