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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater & Air Conditioning Control System (Automatic Air Conditioning) >> DTC/Circuit Diagnosis >> Ionizer >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK POWER SUPPLY FOR IONIZER 
    1. Turn ignition switch OFF.
    2. Disconnect ionizer connector.
    3. Turn ignition switch ON.
    4. Press fan (UP: +) switch.
    5. Check voltage between ionizer harness connector and ground.
      (+) (-) Voltage
      Ionizer -
      Connector Terminal
      M57 1 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Check 10A fuse (No. 3, located in the fuse block). Refer to "FUSE, CONNECTOR AND TERMINAL ARRANGEMENT ".

      • If fuse is OK, check harness for open circuit. Repair or replace if necessary.
      • If fuse is NG, replace fuse and check for short circuit. Repair or replace if necessary.
  2. CHECK CIRCUIT CONTINUITY BETWEEN IONIZER AND GROUND 
    1. Turn ignition switch OFF.
    2. Check continuity between ionizer harness connector and ground.
      Ionizer - Continuity
      Connector Terminal
      M57 3 Ground Existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harnesses or connectors.

  3. CHECK ION ON/OFF SIGNAL 

    Check voltage between ionizer harness connector and ground.

    (+) (-) Condition Voltage
    Ionizer -
    Connector Terminal
    M57 4 Ground Blower motor: OFF 12 V
    Blower motor: ON 0 V

    Is the inspection result normal? 

    YES: Replace ionizer.

    NO: GO TO 4.

  4. CHECK CIRCUIT CONTINUITY BETWEEN UNIFIED METER AND A/C AMP. AND IONIZER 
    1. Turn ignition switch OFF.
    2. Disconnect unified meter and A/C amp. connector.
    3. Check continuity between unified meter and A/C amp. harness connector and ionizer harness connector.
      Ionizer Unified meter and A/C amp. Continuity
      Connector Terminal Connector Terminal
      M57 4 M66 20 Existed
    4. Check continuity between ionizer harness connector and ground.
      Ionizer - Continuity
      Connector Terminal
      M57 4 Ground Not existed

      Is the inspection result normal? 

      YES: Replace unified meter and A/C amp.

      NO: Repair harnesses or connectors.

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