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ECD SYSTEM (w/o DPF), Diagnostic DTC:P0046, P0047, P0048, P004B, P004C, P004D

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DTC Code DTC Name
P0046 Turbocharger / Supercharger Boost Control Solenoid Circuit Range / Performance
P0047 Turbocharger/Supercharger Boost Control "A" Circuit Low
P0048 Turbocharger/Supercharger Boost Control "A" Circuit High
P004B Turbocharger/Supercharger Boost Control Solenoid "B" Circuit Range/Performance
P004C Turbocharger/Supercharger Boost Control Solenoid "B" Circuit Low
P004D Turbocharger/Supercharger Boost Control Solenoid "B" Circuit High
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DESCRIPTION

These DTCs indicates 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 the criteria, the ECM sets 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-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 in sufficient.

Table 1. P0046, P004B
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 5 seconds

Either of the following conditions are met when the motor is driving (1 trip detection logic):


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

  • DC motor current is 2.2 A or more for 5 seconds or more.

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

  • Turbo motor driver

  • DC motor (turbocharger sub-assembly)

  • Turbocharger nozzle vane is stuck or movement is irregular
Table 2. P0047, P004C
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second

Both of following conditions are met for 1 second or more when the motor is driving (1 trip detection logic):


  • DC motor duty ratio is 100%.

  • DC motor current is 0.5 A or less.

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

  • Turbo motor driver

  • DC Motor (turbocharger sub-assembly)

  • Turbocharger nozzle vane is stuck or movement is irregular
Table 3. P0048, P004D
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second DC motor current is 6.5 A or more for 0.5 seconds or more when the motor is operating (1 trip detection logic).

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

  • Turbo motor driver

  • DC Motor (turbocharger sub-assembly)

  • Turbocharger nozzle vane is stuck or movement is irregular
Tip:

If DTC P0046, P0047, P0048, P004B, P004C and/or P004D is stored, the following symptoms may appear.


  • Stuck closed malfunction:


    • Vehicle surge when driving with full load

  • Stuck open malfunction:


    • Lack of power

    • Vehicle surge or hesitation under light or medium load

    • White smoke

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Tip:

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.

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PROCEDURE


  1. Click here

    INSPECT TURBO MOTOR DRIVER (for Bank 1 and Bank 2)


    1. Remove the rear fender splash shield sub-assembly RH.

    2. Remove the front fender liner LH.

    3. Connect the intelligent tester to the DLC3.

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

    5. Enter the following menus: Powertrain / Engine / DTC.

    6. Read the DTCs.

      Tip:

      Record the output DTCs.

    7. Clear the DTCs (Click here).

    8. Turn the ignition switch off.

    9. A015CO3

      Interchange the connectors for the turbo motor driver of bank 1 and bank 2.

    10. Turn the ignition switch to ON for 5 seconds or more.

    11. Enter the following menus: Powertrain / Engine / DTC.

    12. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      DTCs do not change A
      DTCs change B
      No DTC output C

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    INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR) (for Bank 1 or Bank 2)


    1. A01594BE01

      Disconnect the DC motor connector.

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

      Standard Resistance
      Table 4. for Bank 1
      Tester Connection Condition Specified Condition
      1 (M-) - 2 (M+) Always 1 to 100 Ω
      Standard Resistance
      Table 5. for Bank 2
      Tester Connection Condition Specified Condition
      1 (M2-) - 2 (M2+) Always 1 to 100 Ω

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


    1. A0157YAE03

      Disconnect the DC motor connector.

    2. Disconnect the turbo motor driver connector.

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

      Standard Resistance (Check for Open)
      Table 6. for Bank 1
      Tester Connection Condition Specified Condition
      C90-1 (M-) - Turbo motor driver connector-2 (M-) Always Below 1 Ω
      C90-2 (M+) - Turbo motor driver connector-1 (M+) Always Below 1 Ω
      Table 7. for Bank 2
      Tester Connection Condition Specified Condition
      z67-1 (M2-) - Turbo motor driver connector-2 (M2-) Always Below 1 Ω
      z67-2 (M2+) - Turbo motor driver connector-1 (M2+) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Table 8. for Bank 1
      Tester Connection Condition Specified Condition
      C90-1 (M-) or Turbo motor driver connector-2 (M-) - Body ground Always 10 kΩ or higher
      C90-2 (M+) or Turbo motor driver connector-1 (M+) - Body ground Always 10 kΩ or higher
      Table 9. for Bank 2
      Tester Connection Condition Specified Condition
      z67-1 (M2-) or Turbo motor driver connector-2 (M2-) - Body ground Always 10 kΩ or higher
      z67-2 (M2+) or Turbo motor driver connector-1 (M2+) - Body ground Always 10 kΩ or higher

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    REPLACE TURBOCHARGER SUB-ASSEMBLY (for Bank 1 or Bank 2)


    1. Replace turbocharger sub-assembly (for Bank 1 or Bank 2) (Click here).


  5. Click here

    REPLACE TURBO MOTOR DRIVER (for Bank 1 or Bank 2)


    1. Replace turbo motor driver (for Bank 1 or Bank 2) (Click here).


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    REPAIR OR REPLACE HARNESS OR CONNECTOR


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    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.

    4. Turn the ignition switch to ON for 5 seconds or more.

    5. Enter the following menus: Powertrain / Engine / DTC.

    6. Confirm that the DTC is not output again.


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    INSPECT TURBOCHARGER SUB - ASSEMBLY


    1. Connect the intelligent tester to the DLC3.

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

    3. Start the engine and warm up.

    4. Move the shift lever to 3rd and accelerate the vehicle with the accelerator fully open.

    5. Stop the vehicle

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

    7. A0157EXE01

      Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      DTC P0046, P0047, P0048, P004B, P004C and/or P004D are output A
      No DTC output B
      Tip:

      • A snapshot can be used to compare vehicle data from the time of the malfunction to normal data and is very useful for troubleshooting.

      • "Target Booster Pressure" and "MAP" in the snapshot can be used to heck the operation of the turbocharger. If "MAP" does not follow "Target Booster Pressure", the turbocharger nozzle vane may be stuck or the movement may be irregular.

      • When the engine speed is 2500 to 3000 rpm with the accelerator pedal fully depressed, "MAP" is within +/- 10 kPa* of "Target Booster Pressure" (not immediately after beginning of acceleration).

      • * If the turbocharger pressure does not reach a specified value, it cannot be determined whether the system is normal by checking whether "MAP" is within +/-10 kPa of "Target Booster Pressure"

      Tip:

      Compare "MAP" with "Target Booster Pressure" at the point indicated by the arrow (↑) in the illustration.


  9. Click here

    REPLACE TURBOCHARGER SUB - ASSEMBLY

  10. Click here

    END

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    CHECK FOR INTERMITTENT PROBLEMS