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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (7 Of 7) >> Engine (ECM) >> P2587 WASTEGATE Control Valve Position Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK DTC PRIORITY 

    If DTC P2587 is displayed with another DTC P0643, first perform the trouble diagnosis for DTC P0643.

    Is applicable DTC detected?

    YES>>

    Perform diagnosis of applicable. Refer to DTC Description .

    NO>>

    GO TO 2.

  2. CHECK WASTEGATE CONTROL VALVE POSITION SENSOR POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect electric wastegate control actuator (bank 2) harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between electric wastegate control actuator (bank 2) harness connector and ground.
      + - Voltage
      (Approx.)
      Electric wastegate control actuator (bank 2)
      Connector Terminal
      F138 3 Ground 5 V

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Perform the trouble diagnosis for power supply circuit.

  3. CHECK WASTEGATE CONTROL VALVE POSITION SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between electric wastegate control actuator (bank 2) harness connector and ECM harness connector.
      + - Continuity
      Electric wastegate control actuator (bank 2) ECM
      Connector Terminal Connector Terminal
      F138 2 F142 125 Existed
    4. 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 WASTEGATE CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT 
    1. Check the continuity between electric wastegate control actuator (bank 2) harness connector and ECM harness connector.
      + - Continuity
      Electric wastegate control actuator (bank 2) ECM
      Connector Terminal Connector Terminal
      F138 1 F142 120 Existed
    2. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    Repair or replace error-detected parts.

  5. CHECK ELECTRIC WASTEGATE CONTROL ACTUATOR (BANK 2) 

    Check the electric wastegate control actuator (bank 2). Refer to Component Inspection . Is the inspection result normal?

    YES>>

    INSPECTION END

    NO>>

    Replace Turbocharger Assembly (do not replace electric wastegate control actuator (bank 2)only). Refer to TURBOCHARGER : Exploded View .

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