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Home >> Nissan-Datsun >> 2013 >> Juke SL, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0128 >> DTC P0101: MAF Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INTAKE SYSTEM 

    Check the following for connection.

    • Air duct
    • Vacuum hoses
    • Intake air passage between air duct and intake manifold

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Reconnect the parts.

  2. CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect MAF sensor harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between MAF sensor harness connector and ground.
      + - Voltage
      MAF sensor
      Connector Terminal
      F4 5 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  4.

      NO: GO TO 3.

  3. CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between MAF sensor harness connector and IPDM E/R harness connector.
      + - Continuity
      MAF sensor IPDM E/R
      Connector Terminal Connector Terminal
      F4 5 E14 35 Existed
    4. Also check harness for short to ground.

      Is the inspection result normal? 

      YES: Perform the trouble diagnosis for power supply circuit.

      NO: Repair or replace error-detected parts.

  4. CHECK MAF SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between MAF sensor harness connector and ECM harness connector.
      + - Continuity
      MAF sensor ECM
      Connector Terminal Connector Terminal
      F4 4 F25 9 Existed
    4. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace error-detected parts.

  5. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT 
    1. Check the continuity between MAF sensor harness connector and ECM harness connector.
      + - Continuity
      MAF sensor ECM
      Connector Terminal Connector Terminal
      F4 3 F25 13 Existed
    2. Also check harness for short to ground and to power.

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace error-detected parts

  6. CHECK INTAKE AIR TEMPERATURE SENSOR 1 

    Check the intake air temperature sensor 1. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace MAF sensor (with intake air temperature sensor 1). Refer to "EXPLODED VIEW ".

  7. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Check the EVAP control system pressure sensor. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Replace EVAP control system pressure sensor. Refer to "2WD: EXPLODED VIEW ".

  8. CHECK MAF SENSOR 

    Check the MAF sensor. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Replace MAF sensor. Refer to "EXPLODED VIEW ".

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