LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 Through P0153 >> DTC P0106: Manifold Absolute Pressure 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: Repair or replace malfunctioning part.

  2. CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
    1. Disconnect manifold absolute pressure (MAP) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between manifold absolute pressure (MAP) sensor harness connector and ground.
      VOLTAGE SPECIFICATION

      Manifold absolute pressure (MAP) sensor Ground Voltage (V)
      Connector Terminal
      F65 1 Ground Approx. 5

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  3. CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between manifold absolute pressure (MAP) sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATION

      Manifold absolute pressure (MAP) sensor ECM Continuity
      Connector Terminal Connector Terminal
      F65 3 F110 70 Existed
    4. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  4. CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between manifold absolute pressure (MAP) sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATION

      Manifold absolute pressure (MAP) sensor ECM Continuity
      Connector Terminal Connector Terminal
      F65 2 F110 67 Existed
    2. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  5. CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

    Refer to "COMPONENT INSPECTION (MAP SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Replace manifold absolute pressure (MAP) sensor. Refer to "EXPLODED VIEW ".

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

scientia non olet · About LEMON Manuals