ECD SYSTEM, Diagnostic DTC:P0046, P0047, P0048

DTC Code DTC Name
P0046 Turbocharger / Supercharger Boost Control "A" Circuit Range / Performance
P0047 Turbo / Super Charger Boost Control Solenoid Circuit Low
P0048 Turbo / Super Charger Boost Control Solenoid Circuit High

DESCRIPTION

These DTCs indicate that the DC motor of the turbocharger is malfunctioning. The ECM monitors the DC motor current to detect an open or short in the DC motor circuit. If the current meets certain criteria, the ECM stores a DTC and illuminates the MIL immediately.

The DC motor is used to operate the nozzle vane of the turbocharger. The nozzle vane opens and closes to change the velocity of exhaust emissions in order to control the turbo pressure. The ECM varies the duty ratio of the DC motor in accordance with the driving conditions.

If the nozzle vane is stuck closed (DC motor stuck off), drivability may deteriorate at wide open throttle. If the nozzle vane is stuck open (DC motor stuck on), drivability may deteriorate at intermediate throttle positions or the engine power may be insufficient.

P0046
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Maintain the Active Test "Activate the VN Turbo Open" at Open (VN turbo fully open) and OFF (normal control) for 65 seconds or more.

The difference between the target VN opening angle and the actual VN opening angle is 50% or greater for 65 seconds or more.

(1 trip detection logic)

  • Turbocharger nozzle vane control actuator

  • Turbocharger sub-assembly

  • Turbocharger nozzle vane is stuck or movement is irregular
P0047
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
2 seconds after engine is started, race engine for 1 second The DC motor duty ratio is 80% or more and the motor current is 0.5 A or less for 3 seconds or more (1 trip detection logic).

  • Open in DC motor (turbocharger nozzle vane control actuator) circuit

  • Turbocharger nozzle vane control actuator

  • Turbocharger nozzle vane is stuck or movement is irregular
P0048
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
2 seconds after engine is started, race engine for 1 second Overcurrent is detected 25 times or more (0.4 seconds or more) (1 trip detection logic).

  • Short in DC motor (turbocharger nozzle vane control actuator) circuit

  • Turbocharger nozzle vane control actuator

  • Turbocharger nozzle vane is stuck or movement is irregular

Tech Tips


  • If DTC P0046, P0047 and/or P0048 is stored due to the nozzle vane being stuck closed, the following symptom may appear:


    • Vehicle surge when driving with full load

  • If DTC P0046, P0047 and/or P0048 is stored due to the nozzle vane being stuck open, the following symptoms may appear:


    • Lack of power

    • Vehicle surge or hesitation under light or medium load

WIRING DIAGRAM

B007SQKE07

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046, P0047 AND/OR P0048)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    4. Read the DTCs.

      Result
      Result Proceed to
      DTC P0046 is output A
      DTC P0047 and/or P0048 is output B
      DTC P0046, P0047 and/or P0048 and other DTCs are output C

      Tech Tips

      If codes other than P0046, P0047 and/or P0048 are output, perform troubleshooting for those DTCs first.


    B

    INSPECT TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR (DC MOTOR RESISTANCE) Click here

    C

    GO TO DTC CHART Click here

    A

  2. INSPECT TURBOCHARGER NOZZLE VANE PLATE


    1. Remove the turbocharger sub-assembly Click here.

    2. Inspect the turbocharger nozzle vane plate.


      1. Remove the e-washer from the turbocharger nozzle vane control actuator.

      2. Move the turbocharger vane control rod sub-assembly and check that the turbocharger nozzle vane plate moves.

        B007OU0
        Result
        Result Proceed to
        Catches, but operates* OK
        Gets stuck and does not operate NG

        Tech Tips

        *: Check several times.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

  3. REPLACE TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR


    1. Replace the turbocharger nozzle vane control actuator Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  4. REPLACE TURBOCHARGER SUB-ASSEMBLY


    1. Replace the turbocharger sub-assembly Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  5. INSPECT TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR (DC MOTOR RESISTANCE)


    1. B007PVK
      Text in Illustration
      *a

      Component without harness connected

      (DC Motor)

      Disconnect the DC motor connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 1 to 100 Ω

    3. Reconnect the DC motor connector.


    NG

    REPLACE TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (DC MOTOR - ECM)


    1. Disconnect the DC motor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-2 (M+) - D134-19 (VNM+) Always Below 1 Ω
      D65-1 (M-) - D134-49 (VNM-) Always Below 1 Ω
      D65-2 (M+) or D134-19 (VNM+) - Body ground and other terminals Always 10 kΩ or higher
      D65-1 (M-) or D134-49 (VNM-) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the DC motor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPLACE TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR


    1. Replace the turbocharger nozzle vane control actuator Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off and wait for 30 seconds or more.

    4. Turn the ignition switch to ON and turn the GTS on.

    5. Start the engine.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VN Turbo Open.

    7. Maintain the Active Test "Activate the VN Turbo Open" at Open (VN turbo fully open) and OFF (normal control) for 65 seconds or more.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    9. Confirm that the DTC is not output again.


    NEXT

    END