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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 647 (Engine Control System (DTC/Circuit Diagnosis) (16 Of 17)) >> DTC/Circuit Diagnosis >> DTC P34A8: Electric Intake Valve Timing Control Actuator >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC P34A8 is detected with DTC P34AB, first perform the confirmation procedure (trouble diagnosis) for DTC P34A8.

    Is DTC P34AB detected?

    YES

    Perform diagnosis for P34AB. Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK ELECTRIC INTAKE VALVE TIMING (IVT) CONTROL ACTUATOR (BANK 2) TEMPERATURE SENSOR POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect electric IVT control actuator (bank 2) harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between electric IVT control actuator (bank 2) harness connector and ground.

      +

      -

      Voltage

      (Approx.)

      Electric IVT control actuator (bank 2)

      Connector

      Terminal

      F109

      6

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 3.

  3. CHECK ELECTRIC IVT CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT 

    Check electric IVT control module power supply and ground circuit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 2) TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect electric IVT control module harness connector.
    3. Check the continuity between electric IVT control actuator (bank 2) harness connector and electric IVT control module harness connector.

      Electric IVT control actuator (bank 2)

      Electric IVT control module

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F109

      6

      F105

      7

      Existed
    4. Check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    Replace electric IVT control module. Refer to Removal and Installation .

    NO

    Repair or replace error-detected parts.

  5. CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 2) TEMPERATURE SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect electric IVT control module harness connector.
    3. Check the continuity between electric IVT control actuator (bank 2) harness connector and electric IVT control module harness connector.

      Electric IVT control actuator (bank 2)

      Electric IVT control module

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F109

      5

      F105

      15

      Existed
    4. Check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK INTERMITTENT INCIDENT 

    Check intermittent incident. Refer to Intermittent Incident .

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Repair or replace error-detected parts.

  7. REPLACE ELECTRIC IVT CONTROL ACTUATOR (BANK 2) 
    1. Replace electric IVT control actuator (bank 2). Refer to VALVE TIMING CONTROL .
    2. Perform DTC confirmation procedure again. Refer to DTC Description .

    Is the DTC P34A8 detected?

    YES

    Replace electric IVT control module. Refer to Removal and Installation .

    NO

    INSPECTION END

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