FixVault
Home › Nissan-Datsun › 2008 › Quest Base › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Control System - DTCS U1000 Through P0153 › DTC P0132, P0152 A/F Sensor 1 › Diagnostic Procedure

Diagnostic Procedure

  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: Identifying Ground Screws On Body
      G04905326Courtesy of NISSAN MOTOR CO., U.S.A.

    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
      G04905327Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Turn ignition switch ON.
    3. Check voltage between A/F sensor 1 terminal 3 and ground with CONSULT-III or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

    Fig 3: Checking Voltage Between A/F Sensor 1 Terminal 3 And Ground
    G04894593Courtesy of NISSAN MOTOR CO., U.S.A.
  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E5, F14
    • IPDM E/R harness connector E122
    • 15A fuse
    • 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 harness continuity between the following terminals.

      Refer to WIRING DIAGRAM .

      CONNECTOR TERMINAL CONTINUITY SPECIFICATION

        A/F sensor 1 terminal ECM terminal
      Bank 1 1 16
      2 75
      5 35
      6 56
      Bank 2 1 76
      2 77
      5 57
      6 58

      Continuity should exist. 

    4. Check harness continuity between the following terminals and ground.

      Refer to WIRING DIAGRAM .

      CONNECTOR TERMINAL CONTINUITY SPECIFICATION

      Bank 1 Bank 2
      A/F sensor 1 terminal ECM terminal A/F sensor 1 terminal ECM terminal
      1 16 1 76
      2 75 2 77
      5 35 5 57
      6 56 6 58

      Continuity should not exist. 

    5. Also check harness for 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 INTERMITTENT INCIDENT 

    Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    OK or NG 

    OK: GO TO 6.

    NG: Repair or replace.

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

    Replace malfunctioning air fuel ratio (A/F) sensor 1.

    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 

About FixVault