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ECD SYSTEM (w/ DPF), Diagnostic DTC:P0046, P0047, P0048

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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
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DESCRIPTION

These DTCs indicate 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 certain criteria, the ECM stores 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 ratio of the DC motor in accordance with the driving conditions.

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

Table 1. P0046
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 5 seconds

Either condition is met when the motor is operating (1 trip detection logic):


  • The DC motor duty ratio exceeds the threshold for 0.5 seconds for the specified number of times (in terms of time, this amounts to 100 seconds or more).

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

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

  • DC motor (turbocharger sub-assembly)

  • Turbocharger nozzle vane is stuck or movement is irregular
Table 2. P0047
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
2 seconds after engine is started, race engine for 1 second The DC motor duty ratio is 80% or more and the motor current is 0.5 A or less for 3 seconds or more (1 trip detection logic).

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

  • DC motor (turbocharger sub-assembly)

  • Turbocharger nozzle vane is stuck or movement is irregular
Table 3. P0048
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
2 seconds after engine is started, race engine for 1 second Overcurrent is detected 25 times or more (0.4 seconds or more) (1 trip detection logic).

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

  • DC motor (turbocharger sub-assembly)

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

  • If DTC P0046, P0047 and/or P0048 is stored due to the nozzle vane being stuck closed, the following symptom may appear:


    • Vehicle surge when driving with full load

  • If DTC P0046, P0047 and/or P0048 is stored due to the nozzle vane being stuck open, the following symptoms may appear:


    • Lack of power

    • Vehicle surge or hesitation under light or medium load

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

  • After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).

  • After replacing an injector assembly, the ECM needs registration (See PageClick here).

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

    CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046, P0047 AND/OR P0048)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the tester on.

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

    4. Read the DTCs.

      Table 4. Result
      Result Proceed to
      P0046, P0047 and/or P0048 is output A
      P0046, P0047 and/or P0048 and other DTCs are output B
      Tip:

      If codes other than P0046, P0047 and/or P0048 are output, perform troubleshooting for those DTCs first.


  2. Click here

    INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR OPERATION)


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


  3. Click here

    INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR RESISTANCE)


    1. A01DOEGE17

      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 1 to 100 Ω
      Table 5. Text in Illustration
      *a

      Component without harness connected

      (DC Motor)

    3. Reconnect the DC motor connector.


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    CHECK HARNESS AND CONNECTOR (DC MOTOR - ECM)


    1. 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
      C75-1 (M-) - C93-14 (M-) Always Below 1 Ω
      C75-2 (M+) - C93-15 (M+) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C75-1 (M-) or C93-14 (M-) - Body ground Always 10 kΩ or higher
      C75-2 (M+) or C93-15 (M+) - Body ground Always 10 kΩ or higher

    4. Reconnect the DC motor connector.

    5. Reconnect the ECM connector.


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    REPLACE ECM


    1. Replace the ECM (Click here).


  6. Click here

    REPLACE TURBOCHARGER SUB-ASSEMBLY


    1. Replace the turbocharger sub-assembly (Click here).


  7. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


  8. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the engine switch off.

    4. Turn the engine switch on (IG) for 5 seconds or more.

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

    6. Confirm that the DTC is not output again.


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    END

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    CHECK FOR INTERMITTENT PROBLEMS

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    GO TO DTC CHARTClick here