DTC    P0046    Turbocharger / Supercharger Boost Control Solenoid Circuit Range / Performance

for Preparation Click here


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:
  1. Engine running
  2. Depress and release accelerator pedal
    (DC motor varies)
Either of following conditions is met:
(1 trip detection logic)
  1. (a) DC motor duty is 88% or more for 0.5 seconds.
    (MIL is not illuminated)
  2. (b) Remains condition (a) for 1 minute or more after 20 seconds elapsed from condition (a) detected.
    (MIL is illuminated)
  3. (c) When condition (a) is detected 10 times with 20 seconds intervals.
    (MIL is illuminated)
  4. (d) Short in DC motor (turbocharger sub-assembly) circuit
    (MIL is illuminated)
  1. Open or short in DC motor (turbocharger sub-assembly) circuit
  2. Turbocharger sub-assembly (DC motor)
  3. Nozzle vane position sensor (turbocharger subassembly)
  4. ECM
Ignition switch from ON to off
VN turbocharger position does not move smoothly within predetermine 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 set when the ignition switch is next turned to ON)
(MIL is not illuminated)
(1 trip detection logic)
  1. Open or short in DC motor (turbocharger sub-assembly) circuit
  2. Turbocharger sub-assembly (DC motor)
  3. Nozzle vane position sensor (turbocharger subassembly)
  4. ECM

Related Data List 
DTC No.
Data List
P0046
  1. Target Booster Pressure
  2. MAP
  3. Booster Pressure Deviation
  4. VN Turbo Command

HINT:
  1. If DTC P0046 is stored, the following symptoms may appear.
    1. Poor acceleration
    2. Lack of power due to fail-safe operation


WIRING DIAGRAM


A199000E01


INSPECTION PROCEDURE

NOTICE:
When replacing the ECM, the ECM needs Registration and Initialization (Click here).

HINT:
  1. When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.
  2. 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.

1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046)

  1. Connect the intelligent tester to the DLC3.

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

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

  1. Read DTCs.
    Result 
    Result
    		Proceed to
    DTC P0046
    		A
    DTC P0046 and other DTCs
    		B

    HINT:
    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


    A200341E01

  1. 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
Go to step 4
OK


3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0046)

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds.

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

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

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

  1. Read the DTCs.
    Result 
    Result
    		Proceed to
    No DTC output
    		A
    DTC P0046
    		B



B
Go to step 6
A

END 

4.INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)


    A200305E01

  1. Disconnect the DC motor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (M-) - 2 (M+)
    		Always
    		0.3 to 100 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (DC Motor)

  1. Reconnect the DC motor connector.



NG
Go to step 6
OK


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


    A200285E01

  1. Disconnect the DC motor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    B40-2 (M+) - B9-34 (M+)
    		Always
    		Below 1 Ω
    B40-1 (M-) - B9-33 (M-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B40-2 (M+) or B9-34 (M+) - Body ground
    		Always
    		10 kΩ or higher
    B40-1 (M-) or B9-33 (M-) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to DC Motor)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the DC motor connector.

  1. Reconnect the ECM connector.



NG
Go to step 7
OK


6.REPLACE TURBOCHARGER SUB-ASSEMBLY

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



NEXT
Go to step 8

7.REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT


8.CHECK WHETHER DTC OUTPUT RECURS (DTC P0046)

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds.

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

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

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

  1. Read the DTCs.
    Result 
    Result
    		Proceed to
    No DTC output
    		A
    DTC P0046
    		B



B
Go to step 9
A

END 

9.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


10.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds.

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

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

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

  1. Confirm that the DTC is not output again.


NEXT

END