SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P123513

DTC Code DTC Name
P123513 High Pressure Fuel Pump Circuit Open

DESCRIPTION

The high-pressure direct injection fuel system consists of a spill control valve, check valve, relief valve and pump plunger. The spill control valve adjusts the return volume of the high-pressure fuel. The check valve mechanically opens and closes the paths to the fuel delivery pipes. The relief valve releases the fuel back to the fuel tank if the high-pressure fuel system malfunctions. The fuel pump (for high pressure side) is installed to the cylinder head cover and operated by a cam installed to the rear end of the intake camshaft. Rotation of the camshaft moves the pump plunger inside the fuel pump (for high pressure side) up and down, pressurizing the fuel. The pressurized fuel opens the check valve and is pumped into the fuel delivery pipe.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P123513 High Pressure Fuel Pump Circuit Open Open or short in fuel pump (for high pressure side) circuit for 60 times or more (1 trip detection logic).
  • Open or short in fuel pump (for high pressure side) circuit

  • Fuel pump (for high pressure side)

  • ECM

Comes on DTC stored SAE: P1235

MONITOR DESCRIPTION

If an open or short in the fuel pump (for high pressure side) circuit is detected after the engine is started, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Required Sensors/Components (Main) Fuel pump (for high pressure side)
Required Sensors/Components (Related) Injector driver (ECM)
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

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

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

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

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

  6. Start the engine.

  7. Idle the engine for 10 seconds [A].

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [B].

  9. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  11. Input the DTC: P123513.

  12. Check the DTC judgment result.

    GTS Display Description
    NORMAL
    • DTC judgment completed

    • System normal

    ABNORMAL
    • DTC judgment completed

    • System abnormal

    INCOMPLETE
    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM

B0058F0E01
*a Shielded
*b Fuel Pump (for High Pressure Side)

CAUTION / NOTICE / HINT

Tech Tips


  • If the current from the EDU relay is cut because DTC P062D13 is stored, DTC P123513 will be stored even if the fuel pump (for high pressure side) is normal.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. INSPECT FUEL PUMP (FOR HIGH PRESSURE SIDE)


    1. Inspect the fuel pump (for high pressure side).

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel pump (for high pressure side).

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  2. CHECK HARNESS AND CONNECTOR (ECM - FUEL PUMP (FOR HIGH PRESSURE SIDE))


    1. Disconnect the ECM connector.

    2. Disconnect the fuel pump (for high pressure side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C20-28 (FP1+) - C24-1 (FP+) Always Below 1 Ω
      C20-29 (FP1-) - C24-2 (FP-) Always Below 1 Ω
      C20-28 (FP1+) or C24-1 (FP+) - Body ground and other terminals Always 10 kΩ or higher
      C20-29 (FP1-) or C24-2 (FP-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG