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Home >> Infiniti >> 2012 >> G37 IPL, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (HVAC Control System (Sedan)) >> DTC/Circuit Diagnosis >> SUNLOAD Sensor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
    1. Disconnect sunload sensor connector.
    2. Turn ignition switch ON.
    3. Check voltage between sunload sensor harness connector and ground.
    (+) (-) Voltage (Approx.)
    Sunload sensor -
    Connector Terminal
    M46 1 Ground 5 V

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
    1. Turn ignition switch OFF.
    2. Disconnect unified meter and A/C amp. connector.
    3. Check continuity between sunload sensor harness connector and unified meter and A/C amp. harness connector.
    Sunload sensor Unified meter and A/C amp. Continuity
    Connector Terminal Connector Terminal
    M46 2 M67 62 Existed

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair harness or connector.

  3. CHECK SUNLOAD SENSOR
    1. Reconnect sunload sensor connector and unified meter and A/C amp. connector.
    2. Check sunload sensor. Refer to "Component Inspection ".

    Is the inspection result normal? 

    YES: Replace unified meter and A/C amp.

    NO: Replace sunload sensor.

  4. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
    1. Turn ignition switch OFF.
    2. Disconnect unified meter and A/C amp. connector.
    3. Check continuity between sunload sensor harness connector and unified meter and A/C amp. harness connector.
      Sunload sensor Unified meter and A/C amp. Continuity
      Connector Terminal Connector Terminal
      M46 1 M67 46 Existed
    4. Check continuity between sunload sensor harness connector and ground.
    Sunload sensor - Continuity
    Connector Terminal
    M46 1 Ground Not existed

    Is the inspection result normal? 

    YES: Replace unified meter and A/C amp.

    NO: Repair harness or connector.

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