СИСТЕМА ECD, Diagnostic DTC:P1229

DESCRIPTION

MONITOR DESCRIPTION

The ECM stores this DTC if the common rail pressure inside the common rail remains higher than the target common rail pressure, despite the ECM closing the suction control valve. This DTC indicates that the suction control valve may be stuck open, or there may be a short in its circuit.

If this DTC is stored, the ECM enters fail-safe mode and limits the engine power. The ECM continues operating in fail-safe mode until the ignition switch is turned off.

WIRING DIAGRAM

Refer to DTC P0088 (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK OTHER DTC OUTPUT

   
   

   1. Connect the GTS to the DLC3.

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

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

   4. Read the DTCs.

      Table 3. Result

      Result	Proceed to
      P1229 and "P0190, P0192 and/or P0193" are output	B
      Except above	A

   
   
   • AClick here
   • BClick here
2. Click here

   READ VALUE USING GTS (COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE)

   
   

   1. Connect the GTS to the DLC3.

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

   3. Start the engine and warm it up.

   4. Enter the following menus: Powertrain / Engine and ECT / Data List / Common Rail Pressure and Target Common Rail Pressure.

   5. Check that the internal fuel pressure of the common rail is within the specification below.

      OK
      Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure when engine is idling after warm up the engine.

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)

   
   

   1. Disconnect the suction control valve connector.

   2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition D47-1 - D105-41 (PCV+) Always Below 1 Ω D47-2 - D105-81 (PCV-) Always Below 1 Ω D47-1 or D105-41 (PCV+) - Body ground Always 10 kΩ or higher D47-2 or D105-81 (PCV-) - Body ground Always 10 kΩ or higher

   4. Reconnect the suction control valve connector.

   5. Reconnect the ECM connector.

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   
   

   1. Repair or replace the harness or connector.

   
   
   • NEXTClick here
5. Click here

   PERFORM ACTIVE TEST USING GTS (TEST THE FUEL LEAK)

   
   

   1. Connect the GTS to the DLC3.

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

   3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Test the Fuel Leak / Data List / Common Rail Pressure, Target Common Rail Pressure.

   4. Take a snapshot with the GTS during the Active Test.

   5. 

      Measure the difference between the target fuel pressure (Target Common Rail Pressure) and the actual fuel pressure (Common Rail Pressure) when the "Test the Fuel Leak" Active Test is performed (Click here).

      Tip:

      In order to obtain an exact measurement, perform the Active Test 5 times and measure the difference once each time the Active Test is performed.

      OK
      The difference between the target common rail pressure and the actual common rail pressure 2 seconds after the Active Test starts is less than 10000 kPa.

      Tip:
      

      • "Target Common Rail Pressure" is the target fuel pressure controlled by the ECM.

      • "Common Rail Pressure" is the actual fuel pressure.

      Table 4. Result

      Result	Proceed to
      The difference between the target common rail pressure and the actual common rail pressure 2 seconds after the Active Test starts is less than 10000 kPa.	B
      Except above	A

   
   
   • AClick here
   • BClick here
6. Click here

   CLEAN FUEL FILTER CASE AND REPLACE FUEL FILTER

   
   

   1. Clean the fuel filter case and replace the fuel filter.

      Tip:

      Be sure to clean the inside of the fuel filter case as the fuel injectors may not operate properly if the fuel filter is installed with foreign matter remaining inside the fuel filter case.

   
   
   • NEXTClick here
7. Click here

   REPLACE SUCTION CONTROL VALVE

   
   

   1. Replace the suction control valve (Click here).

   
   
   • NEXTClick here
8. Click here

   BLEED AIR FROM FUEL SYSTEM

   
   

   1. Bleed the air from the fuel system (Click here).

   
   
   • NEXTClick here
9. Click here

   PERFORM FUEL SUPPLY PUMP INITIALIZATION

   
   

   1. Perform fuel supply pump initialization (Click here).

   
   
   • NEXTClick here
10. Click here

    CHECK CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    
    

    1. Connect the GTS to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch off for 30 seconds or more.

    4. Start the engine.

    5. Idle the engine for 60 seconds, and then run it at 2500 rpm without load for 60 seconds.

    6. Confirm that the DTC is not output again.

       Tip:

       Perform the following procedure using the GTS to determine whether or not the DTC judgment has been carried out.

       
       

       1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

       2. Input DTC P1229.

       3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or N/A, increase the idling time.

    
    
    • NEXTClick here
11. Click here

    END

12. Click here

    GO TO FUEL RAIL PRESSURE SENSOR CIRCUITClick here

13. Click here

    CHECK FOR INTERMITTENT PROBLEMSClick here