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Home >> Nissan-Datsun >> 2008 >> Rogue SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0146 (CALIFORNIA) >> P0146 Ho2S3 >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E21. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

    Is the inspection result normal?

    YES: GO TO 2.

    NO: Repair or replace ground connection.

  2. CHECK HO2S3 GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect heated oxygen sensor 3 harness connector.
    3. Disconnect ECM harness connector.
    4. Check the continuity between HO2S3 harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      HO2S3 ECM Continuity
      Connector Terminal Connector Terminal
      E50 1 F8 35 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES: GO TO  4.

    NO: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E7, F121
    • Harness for open or short between heated oxygen sensor 3 and ECM

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

  4. CHECK HO2S3 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between HO2S3 harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      HO2S3 ECM Continuity
      Connector Terminal Connector Terminal
      E50 4 F8 34 Existed
    2. Check the continuity between HO2S3 harness connector or ECM harness connector and ground.
      TERMINALS CONTINUITY REFERENCE

      HO2S3 ECM Ground Continuity
      Connector Terminal Connector Terminal
      E50 4 F8 34 Ground Not existed
    3. Also check harness for short to power.

    Is the inspection result normal?

    YES: GO TO  6.

    NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E7, F121
    • Harness for open or short between heated oxygen sensor 3 and ECM

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

  6. CHECK HO2S3 CONNECTOR FOR WATER

    Check connectors for water.

    Water should not exist. 

    Is the inspection result normal?

    YES: GO TO 7.

    NO: Repair or replace harness or connectors.

  7. CHECK HEATED OXYGEN SENSOR 3

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal?

    YES: GO TO  9.

    NO: GO TO 8.

  8. REPLACE HEATED OXYGEN SENSOR 3

    Replace heated oxygen sensor 3.

    CAUTION:
    • Discard any heated oxygen 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 oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

    INSPECTION END

  9. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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