ECD SYSTEM (w/o EGR Cooler Bypass Valve), Diagnostic DTC:P0047, P0048

DTC Code DTC Name
P0047 Turbocharger/Supercharger Boost Control "A" Circuit Low
P0048 Turbocharger/Supercharger Boost Control "A" Circuit High

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
P0047

All of following conditions met for 1 second or more

(1 trip detection logic):

Turbocharger variable nozzle motor drive duty ratio 100 %

Turbocharger variable nozzle motor drive current 0.5 A or less

  • Open in DC motor circuit

  • Turbo motor driver

  • Turbocharger sub-assembly (DC Motor)
P0048

Turbocharger variable nozzle motor drive current 6.5 A or more for 0.5 seconds or more

(1 trip detection logic)

  • Short in DC motor circuit

  • Turbo motor driver

  • Turbocharger sub-assembly (DC Motor)

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.

PROCEDURE


  1. 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 to D in illustration below.
      A01KFR2E01

    3. After confirming that the operation link contacts stopper bolt, start the engine.

    4. Perform test drive.

    5. Turn the ignition switch to OFF.

    6. After ignition switch is turned to OFF, check that the operation link contacts stopper bolt again.

      OK
      Operation link contacts stopper bolt

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)


    1. A01KIO5E15
      Text in Illustration
      *1 DC Motor
      *a Component 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

  3. 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

  4. REPLACE TURBO MOTOR DRIVER


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0047 AND/OR P0048)


    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 / DTC.

    4. Read DTCs.

      Result
      Display (DTC Output) Proceed to
      P0047 and/or P0048 A
      No output B

    B

    END

    A

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here