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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1876 (Manual Air Conditioner) >> Trouble Diagnosis >> Intake Sensor Circuit >> Diagnostic Procedure For Intake Sensor
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Diagnostic Procedure For Intake Sensor

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM: Intake sensor circuit is open or shorted.

Fig 1: Checking Intake Sensor Circuit
G04205935Courtesy of NISSAN MOTOR CO., U.S.A.
  1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND 
    1. Disconnect intake sensor connector.
    2. Turn ignition switch ON.
    3. Check voltage between intake sensor harness connector M146 terminal 2 and ground.

      2 - Ground: Approx. 5V 

    OK or NG 

    OK: GO TO 2.

    NG: GO TO  4.

    Fig 2: Checking Voltage Between Intake Sensor Harness Connector M146 Terminal 2 And Ground
    G04205936Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL 
    1. Turn ignition switch OFF.
    2. Disconnect front air control connector.
    3. Check continuity between intake sensor harness connector M146 terminal 1 and front air control harness connector M49 terminal 13.

      1 - 13: Continuity should exist. 

    OK or NG 

    OK: GO TO 3.

    NG: Repair harness or connector.

    Fig 3: Checking Continuity Between Intake Sensor Harness Connector M146 Terminal
    G04205937Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK INTAKE SENSOR 

    Check the intake sensor. Refer to "INTAKE SENSOR ".

    OK or NG 

    OK: Replace front air control. Refer to "FRONT AIR CONTROL ".

    NG: Replace intake sensor. Refer to "INTAKE SENSOR ".

  4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL 
    1. Turn ignition switch OFF.
    2. Disconnect front air control connector.
    3. Check continuity between intake sensor harness connector M146 terminal 2 and front air control harness connector M49 terminal 12.

      2 - 12: Continuity should exist. 

    4. Check continuity between intake sensor harness connector M146 terminal 2 and ground.

      2 - Ground: Continuity should not exist. 

      Fig 4: Checking Continuity Between Intake Sensor Harness Connector M146 Terminal
      G04205938Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: Replace front air control. Refer to "FRONT AIR CONTROL ".

    NG: Repair harness or connector.

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