ECD SYSTEM (w/o EGR Cooler), Diagnostic DTC:P0046

DTC Code DTC Name
P0046 Turbocharger / Supercharger Boost Control Solenoid Circuit Range / Performance

DESCRIPTION

Variable nozzle vane type turbocharger consists primarily of a compressor wheel, turbine wheel, nozzle vane, unison ring, DC motor and nozzle vane position sensor.

The ECM outputs a signal to the turbo motor driver, which actuates the DC motor, to control the nozzle vane position.

DTC No. DTC Detection Condition Trouble Area
P0046

Either of following conditions met:


  • DC motor duty ratio +/- 100% for 1.3 seconds or more

  • DC motor current 2.2 A or more for 5 seconds or more when motor driving

    (1 trip detection logic)

  • DC Motor (Turbocharger sub-assembly)

  • Turbo Motor Driver

WIRING DIAGRAM

A01DW67E08

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is 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.

Note

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

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P0046)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester ON.

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

    4. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      P0046 A
      P0046 and other DTCs B

      Tech Tips

      If any DTCs other than P0046 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR OPERATION)


    1. Turn the ignition switch ON.

    2. Turn the ignition switch OFF and check the DC motor operation.

      OK
      When ignition switch is turned OFF, operation link moves as shown in A through D in illustration below.
      Operation link and motor rod move smoothly when moving from position shown in A to that shown in B, and from position shown in B to that shown in C.
      A01DVKLE01

    NG

    INSPECT TURBO MOTOR DRIVER Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  3. INSPECT TURBO MOTOR DRIVER


    1. Voltage Inspection


      1. Turn the ignition switch ON (IG).

        A01E2B0E22

      2. Measure the voltage between the terminals of the turbo motor driver connector.

        Standard voltage
        Tester Connection Specified Condition
        +B (T8-3) - GND (T8-4) 11 to 14 V

    2. Output Waveform Inspection


      1. Turn the ignition switch ON (IG).

        A01DXK7E11

      2. Check the waveform of the ECM connectors using an oscilloscope.

        OK
        Tester Connection Condition Specified Condition
        VNTI (T8-2) - GND (T8-4) Ignition switch ON Correct waveform is as shown

    NG

    REPLACE TURBO MOTOR DRIVER

    OK

  4. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR RESISTANCE)


    1. A01DVMNE03

      Disconnect the T10 DC motor connector.

    2. Measure the resistance of the DC motor.

      Standard resistance
      Tester Connection Specified Condition
      M+ (2) - M- (1) 1 to 100 Ω

    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (DC MOTOR - TURBO MOTOR DRIVER)


    1. A01E2BDE08

      Disconnect the T10 DC motor connector.

    2. Disconnect the T8 turbo motor drive connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      M+ (T8-12) - M+ (T10-2) Below 1 Ω
      M- (T8-5) - M- (T10-1) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      M+ (T8-12) or M+ (T10-2) - Body ground 10 kΩ or higher
      M- (T8-5) or M- (T10-1) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK IF DTC OUTPUT RECURS (DTC P0046)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester ON.

    3. Clear the DTC Click here.

    4. Start the engine.

    5. Perform the test drive.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      P0046 A
      No output B

    B

    END

    A

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here