ECD SYSTEM(w/ DPF), Diagnostic DTC:P0046

DTC Code DTC Name
P0046 Turbocharger / Supercharger Boost Control "A" 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)

Any of following conditions is met:

(2 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 at 20 second 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

  • DC motor (turbocharger sub-assembly)

  • Nozzle vane position sensor (turbocharger sub-assembly)

  • ECM
Ignition switch from ON to off

VN turbocharger position does not change smoothly within predetermined 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 stored when the ignition switch is next turned to ON)

(MIL is not illuminated)

(2 trip detection logic)

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

  • DC motor (Turbocharger sub-assembly)

  • Nozzle vane position sensor (turbocharger sub-assembly)

  • ECM
Related Data List
DTC No. Data List
P0046

  • Target Booster Pressure

  • MAP

  • Target VN Turbo Position

  • Actual VN Turbo Position

Tech Tips


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


    • Poor acceleration

    • Lack of power due to fail-safe operation

WIRING DIAGRAM

Refer to DTC P0045 Click here.

CAUTION / NOTICE / HINT

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 GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0046 is output A
      DTC P0046 and other DTCs are output 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. A01VED1E03
      Text in Illustration
      *a Idling to ignition switch off
      *b Ignition switch ON to idling

      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 GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear DTCs Click here.

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

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

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

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

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

    9. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0046 is output B

    A

    END

    B

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

  4. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)


    1. Inspect the turbocharger sub-assembly (DC motor) Click here.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the B54 DC motor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B54-2 (M+) - B104-48 (VNM+) Always Below 1 Ω
      B54-1 (M-) - B104-18 (VNM-) Always Below 1 Ω
      B54-2 (M+) or B104-48 (VNM+) - Body ground Always 10 kΩ or higher
      B54-1 (M-) or B104-18 (VNM-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B54-2 (M+) - B103-48 (VNM+) Always Below 1 Ω
      B54-1 (M-) - B103-18 (VNM-) Always Below 1 Ω
      B54-2 (M+) or B103-48 (VNM+) - Body ground Always 10 kΩ or higher
      B54-1 (M-) or B103-18 (VNM-) - Body ground Always 10 kΩ or higher

    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 GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear DTCs Click here.

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

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

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

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

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

    9. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0046 is output B

    A

    END

    B

  9. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off within 10 seconds of clearing DTCs and wait for 30 seconds or more.

      Tech Tips

      The ignition switch must be turned off before DTC recurs.

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

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

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

    9. Confirm that the DTC is not output again.


    NEXT

    END