SFI SYSTEM(w/ GPF), Diagnostic DTC:P125A12

DTC Code DTC Name
P125A12 Fuel Flow Control Valve Circuit Short to Battery

DESCRIPTION

The ECM opens and closes the pressure discharge valve assembly to provide optimal control for the operation conditions.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P125A12 Fuel Flow Control Valve Circuit Short to Battery Short circuit in pressure discharge valve assembly circuit and power supply circuit (1 trip detection logic).

  • Short in pressure discharge valve assembly circuit

  • Pressure discharge valve assembly

  • ECM

 - DTC stored SAE: P125C

MONITOR DESCRIPTION

The ECM monitors the output voltage of the pressure discharge valve assembly. The pressure discharge valve assembly turns on and off according to ON/OFF switching of a transistor inside the ECM.

If a continuous mismatch occurs between the ECM transistor state and the output voltage, the ECM evaluates a malfunction in the pressure discharge valve assembly circuit and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components Pressure discharge valve assembly
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

B008H7IE03

  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 and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

  7. Accelerate to 30 km/h (18.6 mph) or more with the accelerator pedal fully depressed [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

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

  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: P125A12.

  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

    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, perform steps [B] and [C] again.

WIRING DIAGRAM

B008JHTE01

CAUTION / NOTICE / HINT

Note

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

Tech Tips

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 PRESSURE DISCHARGE VALVE ASSEMBLY


    1. Inspect the pressure discharge valve assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PRESSURE DISCHARGE VALVE ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (PRESSURE DISCHARGE VALVE ASSEMBLY - ECM)


    1. Disconnect the fuel suction plate sub-assembly (pressure discharge valve assembly) 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
      b1-3 (SFC-) or A35-19 (RFV) - Other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P125A12)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    6. Start the engine and warm it up.

    7. Turn the GTS on.

    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    10. Input the DTC: P125A12.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P125A12 is output)

      		 B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here