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

DESCRIPTION

These DTCs indicates 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 the criteria, the ECM sets 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-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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR) (for Bank 1 or Bank 2)

   
   
   1. 

      *1	Component without harness connected: (DC Motor)

      Disconnect the DC motor connector.

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

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

      Standard Resistance
      for Bank 2 Tester Connection Condition Specified Condition 1 (M2-) - 2 (M2+) Always 1 to 100 Ω

   
   

   NG

   REPLACE TURBOCHARGER SUB-ASSEMBLY (for Bank 1 or Bank 2) Click here

   OK

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

   
   

   1. Disconnect the DC motor (for Bank 1) connector.

   2. Disconnect the DC motor (for Bank 2) connector.

   3. Disconnect the turbo motor driver connector.

      

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

      Standard Resistance (Check for Open)
      for Bank 1 Tester Connection Condition Specified Condition C90-1 (M-) - A48-10 (M-) Always Below 1 Ω C90-2 (M+) - A48-3 (M+) Always Below 1 Ω
      for Bank 2 Tester Connection Condition Specified Condition z67-1 (M2-) - A48-19 (M2-) Always Below 1 Ω z67-2 (M2+) - A48-18 (M2+) Always Below 1 Ω

      Standard Resistance (Check for Short)
      for Bank 1 Tester Connection Condition Specified Condition C90-1 (M-) or A48-10 (M-) - Body ground Always 10 kΩ or higher C90-2 (M+) or A48-3 (M+) - Body ground Always 10 kΩ or higher
      for Bank 2 Tester Connection Condition Specified Condition z67-1 (M2-) or A48-19 (M2-) - Body ground Always 10 kΩ or higher z67-2 (M2+) or A48-18 (M2+) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

   OK

3. INSPECT TURBOCHARGER SUB - ASSEMBLY

   
   

   1. Connect the intelligent tester to the DLC3.

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

   3. Start the engine and warm up.

   4. Move the shift lever to 3rd and accelerate the vehicle with the accelerator fully open.

   5. Stop the vehicle.

   6. Enter the following menus: Powertrain / Engine / DTC.

   7. Read the DTCs.

      Result
      Display (DTC Output) Proceed to DTC P0046, P0047, P0048, P004B, P004C and/or P004D are output A No DTC output B

      Tech Tips

      
      

      • A snapshot can be used to compare vehicle data from the time of the malfunction to normal data and is very useful for troubleshooting.

      • "Target Booster Pressure" and "MAP" in the snapshot can be used to check the operation of the turbocharger. If "MAP" does not follow "Target Booster Pressure", the turbocharger nozzle vane may be stuck or the movement may be irregular.

      • When the engine speed is 2500 to 3000 rpm with the accelerator pedal fully depressed, "MAP" is within +/- 10 kPa^*of "Target Booster Pressure" (not immediately after beginning of acceleration).

      • ^*If the turbocharger pressure does not reach a specified value, it cannot be determined whether the system is normal by checking whether "MAP" is within +/-10 kPa of "Target Booster Pressure".

      

      Tech Tips

      Compare "MAP" with "Target Booster Pressure" at the point indicated by the arrow (↑) in the illustration.

   
   

   A

   REPLACE TURBOCHARGER SUB-ASSEMBLY (for Bank 1 or Bank 2) Click here

   B

4. INSPECT TURBO MOTOR DRIVER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Clear the DTCs Click here.

   3. Turn the engine switch off.

   4. Remove the rear fender splash shield sub-assembly RH.

   5. Remove the front fender liner LH.

   6. Disconnect the turbo motor driver connector.

   7. Reconnect the turbo motor driver connector.

   8. Turn the engine switch on (IG) and turn the tester on.

   9. After starting the engine, idle it for 5 seconds.

   10. Enter the following menus: Powertrain / Engine / DTC.

   11. Read the DTCs.

       Result
       Display (DTC Output) Proceed to DTC is output A DTC is not output B

   
   

   B

   END

   A

5. REPLACE TURBO MOTOR DRIVER

   
   

   1. Replace the turbo motor driver Click here.

      Note

      Make sure that foreign matter does not enter the connector(s) when replacing parts.

   
   

   NEXT

   CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

6. REPLACE TURBOCHARGER SUB-ASSEMBLY (for Bank 1 or Bank 2)

   
   

   1. Replace the turbocharger sub-assembly (for Bank 1 or Bank 2) Click here.

   
   

   NEXT

   CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

7. REPAIR OR REPLACE HARNESS OR CONNECTOR

   
   

   NEXT

8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Clear the DTCs Click here.

   3. Turn the ignition switch off.

   4. Turn the ignition switch to ON for 5 seconds or more.

   5. Enter the following menus: Powertrain / Engine / DTC.

   6. Confirm that the DTC is not output again.

   
   

   NEXT

   END