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Home >> Nissan-Datsun >> 2014 >> Juke SL, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0130 To P0420 >> DTC P0138: Ho2S2 >> Diagnosis Procedure
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Diagnosis Procedure

  1. INSPECTION START 

    Confirm the detected malfunction (A or B). Refer to "DTC LOGIC ".

    Which malfunction is detected? 

    A: GO TO 2.

    B: GO TO  7.

  2. CHECK HO2S2 CONNECTOR FOR WATER 
    1. Turn ignition switch OFF.
    2. Disconnect heated oxygen sensor 2 harness connector.
    3. Check connectors for water.

      Water should not exist. 

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace error-detected parts.

  3. CHECK HO2S2 GROUND CIRCUIT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      F69 1 F25 33 Existed
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair or replace error-detected parts.

  4. CHECK HO2S2 INPUT SIGNAL CIRCUIT 
    1. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      F69 4 F25 29 Existed
    2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and ground.
      + - Continuity
      HO2S2
      Connector Terminal
      F69 4 Ground Not existed
      + - Continuity
      ECM
      Connector Terminal
      F25 29 Ground Not existed
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace error-detected parts.

  5. CHECK HEATED OXYGEN SENSOR 2 

    Check the heated oxygen sensor 2. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: GO TO 6.

  6. REPLACE HEATED OXYGEN SENSOR 2 

    Replace heated oxygen sensor 2. Refer to "EXPLODED VIEW ".

    CAUTION:
    • Discard any 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 sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial service tool).

    : INSPECTION END

  7. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE 
    1. Clear the mixture ratio self-learning value. Refer to "WORK PROCEDURE ".
    2. Run engine for at least 10 minutes at idle speed.

      Is the 1st trip DTC P0172 detected? Is it difficult to start engine? 

      YES: Perform trouble diagnosis for DTC P0172. Refer to "DTC LOGIC ".

      NO: GO TO 8.

  8. CHECK HO2S2 GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect heated oxygen sensor 2 harness connector.
    3. Disconnect ECM harness connector.
    4. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      F69 1 F25 33 Existed
    5. Also check harness for short to ground and to power.

      Is the inspection result normal? 

      YES: GO TO 9.

      NO: Repair or replace error-detected parts.

  9. CHECK HO2S2 INPUT SIGNAL CIRCUIT 
    1. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      F69 4 F25 29 Existed
    2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and ground.
      + - Continuity
      HO2S2
      Connector Terminal
      F69 4 Ground Not existed
      + - Continuity
      ECM
      Connector Terminal
      F25 29 Ground Not existed
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 10.

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

  10. CHECK HEATED OXYGEN SENSOR 2 

    Check the heated oxygen sensor 2. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: GO TO 11.

  11. REPLACE HEATED OXYGEN SENSOR 2 

    Replace heated oxygen sensor 2. Refer to "EXPLODED VIEW ".

    CAUTION:
    • Discard any 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 sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial service tool).

    : INSPECTION END

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