ECD SYSTEM (w/ DPF), Diagnostic DTC:P0046, P0047, P0048, P004B, P004C, P004D

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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.

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INSPECTION PROCEDURE

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PROCEDURE

1. Click here

   CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0046, P0047, P0048, P004B, P004C OR P004D)

   
   

   1. Connect the GTS to the DLC3.

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

   3. Enter the following menus: Engine and ECT / Trouble Codes.

   4. Read the DTCs.

      Table 4. Result

      Result	Proceed to
      P0046, P0047, P0048, P004B, P004C or P004D is output	A
      P0046, P0047, P0048, P004B, P004C or P004D and other DTCs are output	B

      Tip:

      If codes other than P0046, P0047, P0048, P004B, P004C or P004D are output, perform troubleshooting for those DTCs first.

   
   
   • AClick here
   • BClick here
2. Click here

   PERFORM ACTIVE TEST USING GTS (OPERATE TURBOCHARGER SUB-ASSEMBLY)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Engine and ECT / Active Test / Test the Turbo Charger Step Motor (Test the Turbo Charger Step Motor #2) / Data List / Target VN Turbo Position (Target VN Turbo Position #2) and Actual VN Turbo Position (Actual VN Turbo Position #2).

   5. While changing the Active Test value to 20, 95, 60 and 20%, check that Actual VN Turbo Position (Actual VN Turbo Position #2) smoothly changes to the set opening amount.

      Note:

      When moving the vanes toward the fully closed position, make sure that Actual VN Turbo Position (Actual VN Turbo Position #2) does not become 5% or less.

      OK
      The Actual VN Turbo Position (Actual VN Turbo Position #2) value follows the Target VN Turbo Position (Target VN Turbo Position #2).

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR RESISTANCE)

   
   
   1. 

      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 1 (M2-) - 2 (M2+) Always 1 to 100 Ω

      Table 5. Text in Illustration

      *a	Component without harness connected (DC Motor)

   
   
   • OKClick here
   • NGClick here
4. Click here

   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
      Table 6. for LHD Tester Connection Condition Specified Condition C90-2 (M+) - C45-86 (M+) Always Below 1 Ω C90-1 (M-) - C45-85 (M-) Always Below 1 Ω z67-2 (M2+) - C45-18 (VN2+) Always Below 1 Ω z67-1 (M2-) - C45-41 (VN2-) Always Below 1 Ω C90-2 (M+) or C45-86 (M+) - Body ground Always 10 kΩ or higher C90-1 (M-) or C45-85 (M-) - Body ground Always 10 kΩ or higher z67-2 (M2+) or C45-18 (VN2+) - Body ground Always 10 kΩ or higher z67-1 (M2-) or C45-41 (VN2-) - Body ground Always 10 kΩ or higher
      Table 7. for RHD Tester Connection Condition Specified Condition C90-2 (M+) - C46-86 (M+) Always Below 1 Ω C90-1 (M-) - C46-85 (M-) Always Below 1 Ω z67-2 (M2+) - C46-18 (VN2+) Always Below 1 Ω z67-1 (M2-) - C46-41 (VN2-) Always Below 1 Ω C90-2 (M+) or C46-86 (M+) - Body ground Always 10 kΩ or higher C90-1 (M-) or C46-85 (M-) - Body ground Always 10 kΩ or higher z67-2 (M2+) or C46-18 (VN2+) - Body ground Always 10 kΩ or higher z67-1 (M2-) or C46-41 (VN2-) - Body ground Always 10 kΩ or higher

   4. Reconnect the DC motor connector.

   5. Reconnect the ECM connector.

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE ECM

   
   

   1. Replace the ECM (Click here).

   
   
   • NEXTClick here
6. Click here

   REPLACE TURBOCHARGER SUB-ASSEMBLY

   When DTC P0046, P0047 or P0048 is output:

   
   

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

   When DTC P004B, P004C or P004D is output:

   
   

   • Replace the turbocharger sub-assembly (for bank 2) (Click here).

   
   
   • NEXTClick here
7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   
   

   1. Repair or replace the harness or connector.

   
   
   • NEXTClick here
8. Click here

   CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

   
   

   1. Connect the GTS to the DLC3.

   2. Clear the DTCs (Click here).

   3. Turn the engine switch off and wait for at least 30 seconds.

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

   5. 2 seconds after the engine is started, race the engine for 1 second.

   6. Enter the following menus: Engine and ECT / Trouble Codes.

   7. Confirm that the DTC is not output again.

   
   
   • NEXTClick here
9. Click here

   END

10. Click here

    CHECK FOR INTERMITTENT PROBLEMSClick here

11. Click here

    GO TO DTC CHARTClick here