ECD SYSTEM (w/ 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. Check the DC motor operation Click here.


    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)


    1. Measure the resistance between the terminals of the DC motor connector Click here.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    OK

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


    1. Check the resistance of the wire harness between the DC motor and the turbo motor driver Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TURBO MOTOR DRIVER


    1. Replace the turbo motor driver. Click here


    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 to ON and turn the tester on.

    3. Select the following menus: Powertrain / Engine and ECT / 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