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Home >> Infiniti >> 2010 >> FX50 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (VK50VE) - DTC U0101, U0113, U1003, U1001, U1024 & P0011 Through P0159 >> DTC P0132, P0152: A/F Sensor 1 >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in CIRCUIT INSPECTION .

      Is the inspection result normal? 

      YES: GO TO  2.

      NO: Repair or replace ground connection.

  2. CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT 
    1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between A/F sensor 1 harness connector and ground.
      VOLTAGE REFERENCE TABLE

      DTC A/F sensor 1 Ground Voltage
      Bank Connector Terminal
      P0132 1 F67 4 Ground Battery voltage
      P0152 2 F68 4

      Is the inspection result normal? 

      YES: GO TO  4.

      NO: GO TO  3.

  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E10, F10
    • IPDM E/R harness connector E7
    • 15 A fuse (No. 46)
    • Harness for open or short between A/F sensor 1 and fuse

      Repair or replace harness or connectors.

  4. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
      CONTINUITY REFERENCE TABLE

      DTC A/F sensor 1 ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0132 1 F67 1 F111 81 Existed
      2 82
      P0152 2 F68 1 85
      2 86
    4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.
      CONTINUITY REFERENCE TABLE

      DTC A/F sensor 1 ECM Ground Continuity
      Bank Connector Terminal Connector Terminal
      P0132 1 F67 1 F111 81 Ground Not existed
      2 82
      P0152 2 F68 1 85
      2 86
    5. Also check harness for short to 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 INTERMITTENT INCIDENT 

    Perform INTERMITTENT INCIDENT .

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: Repair or replace malfunctioning part.

  6. REPLACE A/F SENSOR 1 

    Replace malfunctioning A/F sensor 1.

    CAUTION:
    • Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
    • Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial service tool).

    INSPECTION END

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