ECD SYSTEM, Diagnostic DTC:P0046

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

DESCRIPTION

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 gas in order to control the turbo pressure. The ECM varies the duty-cycle of the DC motor in accordance with the driving condition.

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

P0046
DTC Detection Drive Pattern DTC Detection Condition Trouble Area

All of following condition are met:


  • Engine running

  • Depress and release accelerator pedal

    (DC motor varies)

Either of following conditions is met:

(1 trip detection logic)


  • (a) DC motor duty is 88% or more for 0.5 seconds.

    (MIL is not illuminated)

  • (b) Remains condition (a) for 1 minute or more after 20 seconds elapsed from condition (a) detected.

    (MIL is illuminated)

  • (c) When condition (a) is detected 10 times with 20 seconds intervals.

    (MIL is illuminated)

  • (d) Short in DC motor (turbocharger sub-assembly) circuit

    (MIL is illuminated)

  • Open or short in DC motor (turbocharger sub-assembly) circuit

  • Turbocharger sub-assembly (DC motor)

  • Nozzle vane position sensor (turbocharger subassembly)

  • ECM
Ignition switch from ON to off

VN turbocharger position does not move smoothly within predetermine time of ignition switch being turned from ON to off (while ECD relay is ON) (Determination of a malfunction is conducted within a given time after the ignition switch is turned from ON to off. If a malfunction is detected within this time, the MIL is illuminated and a DTC is set when the ignition switch is next turned to ON)

(MIL is not illuminated)

(1 trip detection logic)

  • Open or short in DC motor (turbocharger sub-assembly) circuit

  • Turbocharger sub-assembly (DC motor)

  • Nozzle vane position sensor (turbocharger subassembly)

  • ECM
Related Data List
DTC No. Data List
P0046

  • Target Booster Pressure

  • MAP

  • Booster Pressure Deviation

  • VN Turbo Command

Tech Tips


  • If DTC P0046 is stored, the following symptoms may appear.


    • Poor acceleration

    • Lack of power due to fail-safe operation

WIRING DIAGRAM

A0119Q7E01

INSPECTION PROCEDURE

Note

When replacing the ECM, the ECM needs Registration and Initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.

  • Read freeze frame data using the intelligent tester. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046)


    1. Connect the intelligent tester to the DLC3.

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

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

    4. Read DTCs.

      Result
      Result Proceed to
      DTC P0046 A
      DTC 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


    1. A0119KUE01

      Check the motor movement when turning the ignition switch to ON, when starting the engine, and then when turning the ignition switch off.

      OK
      Motor moves smoothly as shown in the illustration.

    NG

    INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR) Click here

    OK

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0046)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off within 10 seconds of clearing DTCs, and wait for 30 seconds.

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

    4. Turn the ignition switch to ON and wait for 10 seconds or more.

    5. Start the engine and fully depress and released the accelerator pedal.

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

    7. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0046 B

    B

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    A

    END

  4. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)


    1. A011AN7E01
      Text in Illustration
      *1

      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 (M-) - 2 (M+) Always 0.3 to 100 Ω

    3. Reconnect the DC motor connector.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

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


    1. A0119SGE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to DC Motor)
      *2

      Front view of wire harness connector

      (to ECM)

      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 (Check for Open)
      Tester Connection Condition Specified Condition
      B40-2 (M+) - B9-34 (M+) Always Below 1 Ω
      B40-1 (M-) - B9-33 (M-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B40-2 (M+) or B9-34 (M+) - Body ground Always 10 kΩ or higher
      B40-1 (M-) or B9-33 (M-) - Body ground 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

  6. REPLACE TURBOCHARGER SUB-ASSEMBLY


    1. Replace the turbocharger sub-assembly Click here.


    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0046) Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0046)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off within 10 seconds of clearing DTCs, and wait for 30 seconds.

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

    4. Turn the ignition switch to ON and wait for 10 seconds or more.

    5. Start the engine and fully depress and released the accelerator pedal.

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

    7. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0046 B

    B

    REPLACE ECM Click here

    A

    END

  9. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off within 10 seconds of clearing DTCs, and wait for 30 seconds.

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

    4. Turn the ignition switch to ON and wait for 10 seconds or more.

    5. Start the engine and fully depress and released the accelerator pedal.

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

    7. Confirm that the DTC is not output again.


    NEXT

    END