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

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

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.

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

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

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

Tech Tips

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

WIRING DIAGRAM

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 Click here.

Tech Tips

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.

PROCEDURE

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

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result
Result	Proceed to
P0046, P0047 and/or P0048 is output	A
P0046, P0047 and/or P0048 and other DTCs are output	B

Tech Tips

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

GO TO DTC CHART Click here

INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR OPERATION)
1. Inspect the turbocharger sub-assembly Click here.
NG
INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR RESISTANCE) Click here

OK

CHECK FOR INTERMITTENT PROBLEMS

INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR RESISTANCE)

Text in Illustration

*a
Component without harness connected

(DC Motor)

Disconnect the DC motor connector.

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

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

Reconnect the DC motor connector.

REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (DC MOTOR - ECM)

Disconnect the DC motor connector.
Disconnect the ECM connector.

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

Reconnect the DC motor connector.
Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

REPLACE ECM
1. Replace the ECM Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
REPLACE TURBOCHARGER SUB-ASSEMBLY
1. Replace the turbocharger sub-assembly Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
REPAIR OR REPLACE HARNESS OR CONNECTOR
1. Repair or replace the harness or connector.
NEXT
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.
NEXT

END