ECD SYSTEM (w/o EGR Cooler Bypass Valve), 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:

Turbocharger variable Nozzle motor drive duty ratio +/- 100 % for 1.3 seconds or more

Turbocharger variable Nozzle motor drive current 2.2 A or more for 5 seconds or more when motor driving

(1 trip detection logic)

  • Turbocharger sub-assembly

  • Turbo motor driver

WIRING DIAGRAM

A01KEPBE03

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 running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

Note

If the ECM is replaced, the new ECM needs 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. Select the following menu items: Powertrain / Engine and ECT / DTC.

    4. Read 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.
      A01KFR2E01

    NG

    INSPECT TURBO MOTOR DRIVER Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  3. INSPECT TURBO MOTOR DRIVER


    1. Voltage Inspection


      1. A01KFAPE42
        Text in Illustration
        *1 Turbo Motor Driver
        *a Component Side

        Turn the ignition switch ON (IG).

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

        Standard voltage
        Tester Connection Specified Condition
        +B (T10-3) - GND (T10-4) 11 to 14 V

    2. Output Waveform Inspection


      1. A01KFL4E21
        Text in Illustration
        *1 Turbo Motor Driver
        *a Component Side

        Turn the ignition switch ON (IG).

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

        OK
        Tester Connection Condition Specified Condition
        VNT1 (T10-2) - GND (T10-4) Ignition switch ON Correct waveform is as shown

    NG

    REPLACE TURBO MOTOR DRIVER

    OK

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


    1. A01KIO5E15
      Text in Illustration
      *1 DC Motor
      *a Wire Harness Side

      Disconnect the T9 DC motor connector.

    2. Measure the resistance between the terminals of the DC motor connector.

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

    3. Reconnect the DC motor connector.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

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


    1. A01KFQXE13
      Text in Illustration
      *1 Turbo Motor Driver Connector
      *2 DC Motor Connector
      *a Wire Harness Side
      *b Front View

      Disconnect the T9 DC motor connector.

    2. Disconnect the T10 turbo motor drive connector.

    3. Check the resistance.

      Standard resistance (Check for open)
      Tester Connections Specified Conditions
      T10-12 (M+) - T9-2 (M+) Below 1 Ω
      T10-5 (M-) - T9-1 (M-) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connections Specified Conditions
      T10-12 (M+) or T9-2 (M+) - Body ground 10 kΩ or higher
      T10-5 (M-) or T9-1 (M-) - Body ground 10 kΩ or higher

    4. Reconnect the turbo motor drive connector.

    5. Reconnect the DC motor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK WHETHER 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 DTCs Click here

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read DTCs.

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

    B

    END

    A

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here