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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 999 (Heater & Air Conditioning Control System) >> With Monochrome Display >> Component Diagnosis >> B2630, B2631 SUNLOAD Sensor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SUNLOAD SENSOR POWER SUPPLY
    1. Disconnect sunload sensor connector.
    2. Turn ignition switch ON.
    3. Check voltage between sunload sensor harness connector M56 terminal 1 and ground.

      1 - Ground: Approx. 5V 

      Fig 1: Checking Voltage Between Sunload Sensor Harness Connector M56 Terminal 1 And Ground
      G05875931Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. CHECK CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
    1. Turn ignition switch OFF.
    2. Disconnect A/C auto amp. connector.
    3. Check continuity between sunload sensor harness connector M56 (A) terminal 2 and A/C auto amp. harness connector M37 (B) terminal 37.

      2 - 37: Continuity should exist. 

      Fig 2: Checking Continuity Between Sunload Sensor Connector M56 Terminal 2 And A/C Auto Amp Connector M37 Terminal 37
      G05875932Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair harness or connector.

  3. CHECK SUNLOAD SENSOR
    1. Reconnect sunload sensor connector and A/C auto amp. connector.
    2. Check sunload sensor. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Replace A/C auto amp. Refer to "REMOVAL AND INSTALLATION ".

    NO: Replace sunload sensor. Refer to "REMOVAL AND INSTALLATION ".

  4. CHECK CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
    1. Turn ignition switch OFF.
    2. Disconnect A/C auto amp. connector.
    3. Check continuity between sunload sensor harness connector M56 (A) terminal 1 and A/C auto amp. harness connector M37 (B) terminal 15.

      1 - 15: Continuity should exist. 

      Fig 3: Checking Continuity Between Sunload Sensor Connector M56 Terminal 1 And A/C Auto Amp Connector M37 Terminal 15
      G05875933Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between sunload sensor harness connector M56 (A) terminal 1 and ground.

      1 - Ground: Continuity should not exist. 

    Is the inspection result normal? 

    YES: Replace A/C auto amp. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair harness or connector.

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