LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1183 (Engine Control System - DTCS U0101 To P0183 (VQ40DE)) >> DTC P0031, P0032, P0051, P0052: A/F Sensor 1 Heater >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK GROUND CONNECTIONS
    1. Turn ignition switch OFF.
    2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
    Fig 1: Checking Ground Connections
    G08170401Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO 2.

    NG: Repair or Replace ground connections.

  2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
    1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
      Fig 2: Identifying Air Fuel Ratio (A/F) Sensor 1 Harness Connector
      G08170402Courtesy of NISSAN NORTH AMERICA, INC.
    2. Turn ignition switch ON.
    3. Check voltage between air fuel ratio sensor 1 terminal 4 and ground with CONSULT or tester.

    Voltage: Battery voltage 

    Fig 3: Checking Voltage Between A/F Sensor 1 Terminal 4 And Ground Using Tester
    G08170403Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E2, F32
    • IPDM E/R harness connector E119
    • 15 A fuse (No. 54)
    • Harness for open or short between air fuel ratio sensor 1 and fuse

    Repair or replace harness or connectors.

  4. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between ECM terminal 2 (bank 2) or 24, 43 (bank 1) and air fuel ratio (A/F) sensor 1 terminal 3.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

    4. Also check harness for short to ground or short to power.

    OK or NG 

    OK: GO TO 5.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 6.

    NG: GO TO  7.

  6. CHECK INTERMITTENT INCIDENT

    Perform "INTERMITTENT INCIDENT ".

    OK or NG 

    OK: GO TO 7.

    NG: Repair or replace.

  7. REPLACE AIR FUEL RATIO (A/F) SENSOR 1

    Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to "EXPLODED VIEW ".

    CAUTION:
    • Discard any air fuel ratio (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 air fuel ratio (A/F) sensor, clean exhaust system threads using Heated Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

    >> INSPECTION END 

scientia non olet · About LEMON Manuals