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Diagnostic Procedure For SUNLOAD Sensor

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM: Sunload sensor circuit is open or shorted. (25 or -25 is indicated on unified meter and A/C amp. as a result of conducting Self-diagnosis STEP-2.)

Fig 1: Sunload Sensor Diagnostic Circuit
G04878074Courtesy of NISSAN MOTOR CO., U.S.A.
  1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND 
    1. Turn ignition switch OFF.
    2. Disconnect sunload sensor connector.
    3. Turn ignition switch ON.
    4. Check voltage between sunload sensor harness connector M65 terminal 1 and ground.

      1 - Ground: Approx. 5V 

    Fig 2: Checking Voltage Between Sunload Sensor Harness Connector M65 Terminal 1 And Ground
    G04887594Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  2.

    NG: 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 M65 terminal 2 and unified meter and A/C amp. harness connector M89 terminal 49.

      2 - 49: Continuity should exist  .

    Fig 3: Checking Continuity Between Sunload Sensor And Unified Meter And A/C Amp. Connector Terminal
    G04917620Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  3.

    NG: Repair harness or connector.

  3. CHECK SUNLOAD SENSOR 

    Refer to "SUNLOAD SENSOR ".

    OK or NG 

    OK:

    1. Replace unified meter and A/C amp. Refer to "UNIFIED METER AND A/C AMP ".
    2. Go to "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.

    NG:

    1. Replace sunload sensor. Refer to "SUNLOAD SENSOR ".
    2. Go to "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
  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 M65 terminal 1 and display and unified meter and A/C amp. harness connector M89 terminal 50.

      1 - 50: Continuity should exist  .

    4. Check continuity between sunload sensor harness connector M65 terminal 1 and ground.

      1 - Ground: Continuity should not exist  .

    Fig 4: Checking Continuity Between Sunload Sensor And Unified Meter And A/C Amp. Connector Terminal
    G04917621Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK:

    1. Replace unified meter and A/C amp. Refer to "UNIFIED METER AND A/C AMP ".
    2. Go to "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.

    NG: Repair harness or connector.

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