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 suction control valve circuit

  • Suction control valve

  • Fuel pressure sensor (built into common rail assembly)

  • ECM

Comes on DTC stored
Related Data List
DTC No. Data List
P1229
  • Fuel Press

  • Target Common Rail Pressure

  • Injection Pressure Correction

  • Target Pump SCV Current

  • Pump SCV Learning Value

Tech Tips


  • For more information on the 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 and ECT / Data List / All Data / Fuel Press and Target Common Rail Pressure.

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

  • When there is a problem with the movement of the supply pump assembly (when Fuel Press 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.

MONITOR DESCRIPTION


CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P1229 Idling for 60 seconds

WIRING DIAGRAM

Refer to DTC P0088.

Click here

CAUTION / NOTICE / HINT

Note


  • After replacing the ECM, the new ECM needs registration (Click here) and initialization Click here.

  • After replacing the suction control valve, the ECM needs initialization.

    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 "Fuel Press", "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 and ECT / Trouble Codes.

    4. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      Except below A
      DTC P1229 and "P0190, P0192 and/or P0193" are output B

    B
    A
  2. READ VALUE USING GTS (FUEL PRESS 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 / All Data / Fuel Press and Target Common Rail Pressure.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Target Common Rail Pressure
      Fuel Press
    5. Check that the internal fuel pressure of the common rail assembly is within the specification below.

      OK
      Fuel Press is within 5000 kPa of Target Common Rail Pressure when engine is idling after warm up the engine.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  3. CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)

    Result
    Proceed to
    OK
    NG

    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
      B148-1 - B164-41 (PCV+) Always Below 1 Ω
      B148-2 - B164-81 (PCV-) Always Below 1 Ω
      B148-1 or B164-41 (PCV+) - Body ground Always 10 kΩ or higher
      B148-2 or B164-81 (PCV-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    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. Start the engine and turn the GTS on.

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


      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Test the Fuel Leak
      Data List Display
      Target Common Rail Pressure
      Fuel Press
    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 (Fuel Press) 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.

      A00Y7RBE06
      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 (102.0 kgf/cm2, 1451 psi).

      Tech Tips


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

      • "Fuel Press" is the actual fuel pressure in common rail assembly.

      Result
      Result Proceed to
      Except below A

      The difference between the target fuel pressure and the actual fuel pressure 2 seconds after the Active Test starts is less than 10000 kPa (102.0 kgf/cm2, 1451 psi).

      B

    B
    A
  6. REPLACE FUEL FILTER ELEMENT SUB-ASSEMBLY


    1. Replace the fuel filter element sub-assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  7. REPLACE SUCTION CONTROL VALVE


    1. Replace the suction control valve.

      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 SUPPLY PUMP INITIALIZATION


    1. Perform the supply pump initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs
    5. Turn the ignition switch off for 30 seconds or more.

    6. Start the engine and turn the GTS on.

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

    8. Confirm that the DTC is not output.

      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 and ECT / Utility / All Readiness.


        Powertrain > Engine and ECT > 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