ECD SYSTEM, Diagnostic DTC:P1229

DTC Code DTC Name
P1229 Fuel Pump System

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1229 Fuel Pump System

The actual fuel pressure exceeds the target fuel pressure by 5000 kPa or higher for 30 seconds.

(1 trip detection logic)

  • Short in fuel supply pump assembly (suction control valve) circuit

  • Fuel supply pump assembly (suction control valve)

  • Fuel pressure sensor (common rail assembly)

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List
P1229

  • Common Rail Pressure

  • Target Common Rail Pressure

  • Injection Pressure Correction

  • Target Pump SCV Current

Tech Tips


  • For more information on the fuel supply pump assembly (suction control valve) and common rail system, refer to System Description Click here.

  • When DTC P1229 is stored, check the internal fuel pressure of the common rail by entering the following menus: Powertrain / Engine / Data List / Common Rail Pressure, Target Common Rail Pressure.

    Under a stable condition such as idling after warm up the engine, Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure when normal.

  • When there is a problem with the movement of the fuel supply pump assembly (when Common Rail Pressure is higher than Target Common Rail Pressure due to a problem in which the suction valve has difficulty closing), the values of Injection Pressure Correction and Target Pump SCV Current decrease.

CONFIRMATION DRIVING PATTERN

P1229
DTC Detection Drive Pattern Idling for 60 seconds

MONITOR DESCRIPTION


WIRING DIAGRAM

Refer to DTC P0088 Click here.

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses of circuits related to this system before performing the following procedure.

  • After replacing the ECM, the new ECM needs registration (See page ) 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 GTS. 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.

  • When this DTC is stored, be sure to carefully examine "Common Rail Pressure", "Target Common Rail Pressure", "Target Pump SCV Current", and "Pump SCV Learning Value" in the freeze frame data.

PROCEDURE


  1. 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 / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    4. Read the DTCs.

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

    B

    GO TO FUEL RAIL PRESSURE SENSOR CIRCUIT Click here

    A

  2. 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 / Data List / Common Rail Pressure and Target Common Rail Pressure.


      Powertrain > Engine > Data List
      Tester Display
      Target Common Rail Pressure
      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.
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. 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
      C119-1 - C55-2 (PCV+) Always Below 1 Ω
      C119-2 - C55-1 (PCV-) Always Below 1 Ω
      C119-1 or C55-2 (PCV+) - Body ground Always 10 kΩ or higher
      C119-2 or C55-1 (PCV-) - Body ground Always 10 kΩ or higher

    4. Reconnect the suction control valve connector.

    5. Reconnect the ECM connector.

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  4. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  5. 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 / Active Test / Test the Fuel Leak / Data List / Common Rail Pressure, Target Common Rail Pressure.


      Powertrain > Engine > Active Test
      Active Test Display
      Test the Fuel Leak
      Data List Display
      Target Common Rail Pressure
      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

      Tech Tips

      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.

      B0027UBE19
      OK
      The difference between the target fuel pressure and the actual fuel pressure 2 seconds after the Active Test starts is less than 10000 kPa.

      Tech Tips


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

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

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

    B

    GO TO STEP 10 Click here

    A

  6. REPLACE FUEL FILTER ELEMENT SUB-ASSEMBLY


    1. Replace the fuel filter element assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)


    1. Replace the fuel supply pump assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  8. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. PERFORM FUEL SUPPLY PUMP INITIALIZATION


    1. Perform fuel supply pump initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    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.

      Tech Tips

      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 / Utility / All Readiness.


        Powertrain > Engine > Utility
        Tester Display
        All Readiness

      2. Input DTC P1229.

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

      Result
      Proceed to
      NEXT

    NEXT

    END