Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000002B52N
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P107A11; Fuel Rail Pressure Sensor (Low) Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]

DTC

P107A11

Fuel Rail Pressure Sensor (Low) Circuit Short to Ground

DESCRIPTION

The No. 2 fuel pressure sensor (for low pressure side) replaces the fuel pressure with electrical signals and outputs them to the ECM. The ECM controls the optimal fuel pressure for the operation conditions to reduce the fuel pump power consumption and improve fuel economy.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P107A11

Fuel Rail Pressure Sensor (Low) Circuit Short to Ground

Diagnosis condition:

  • 2 seconds or more have elapsed after the engine started.

Abnormal condition:

  • The No. 2 fuel pressure sensor (for low pressure side) output voltage is less than 0.43 V.

Malfunction time:

  • 3 seconds or more

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection:

  • No. 2 fuel pressure sensor (for low pressure side)
  • Open or short in No. 2 fuel pressure sensor (for low pressure side) circuit
  • No. 2 fuel pressure sensor (for low pressure side)
  • ECM

Comes on

DTC stored
  • SAE Code: P107C
  • DTC for Mexico Models: Applies

HINT:

When this DTC is output, check the fuel pressure (for low pressure side) in the Data List. Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

DTC No.

Fuel Pressure (Low) / Fuel Pressure 2

Malfunction

P107A11

Approximately 0 kPag
  • Short to ground in PFL circuit
  • Short in PFL to EPFL circuit
  • Open in VCPF circuit

If the Data List values is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

MONITOR DESCRIPTION

2 seconds or more after the engine has started, if the output voltage of the No. 2 fuel pressure sensor (for low pressure side) is less than 0.43 V for 3 seconds or more, the ECM determines that the No. 2 fuel pressure sensor (for low pressure side) circuit is malfunctioning and illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P107C: Fuel rail pressure sensor range check (Low voltage)

Required Sensors/Components (Main)

No. 2 fuel pressure sensor (for low pressure side)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

3 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Battery voltage

8 V or higher

Ignition switch

ON

Starter

Off

Time after engine start

2 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

Fuel rail pressure sensor voltage

Less than 0.43 V

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2021 - 2025 MY Corolla Corolla Hatchback [04/2020 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSIS SYSTEM

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Start the engine.
  7. Idle the engine for 10 seconds or more [A].
  8. Turn the Techstream on.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  10. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Proceed to the next screen and enter the DTC to be checked.
  13. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [A] through [B] again.
    • [A] to [B]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the Techstream. 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.

READ VALUE USING TECHSTREAM (FUEL PRESSURE (LOW) / FUEL PRESSURE 2)

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display

Fuel Pressure (Low) / Fuel Pressure 2

(e) Record the Fuel Pressure (Low) / Fuel Pressure 2 value.

(f) Turn the ignition switch off.

(g) Turn the Techstream off.

(h) Disconnect the No. 2 fuel pressure sensor (for low pressure side) connector.

(i) Turn the ignition switch to ON.

(j) Turn the Techstream on.

(k) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display

Fuel Pressure (Low) / Fuel Pressure 2

(l) Compare the Data List value when the connector is connected and when the connector is not connected.

Result

Proceed to

The value of Fuel Pressure (Low) / Fuel Pressure 2 changes

A

The value of Fuel Pressure (Low) / Fuel Pressure 2 does not change

B
B

GO TO STEP 4

A

2.

CHECK TERMINAL VOLTAGE (NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))

*a

Front view of wire harness connector

(to No. 2 Fuel Pressure Sensor (for Low Pressure Side))

(a) Disconnect the No. 2 fuel pressure sensor (for low pressure side) connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

F5-1 (VC) - Body ground

Ignition switch ON

4.5 to 5.5 V

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

NG

3.

CHECK HARNESS AND CONNECTOR (NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE) - ECM)

(a) Disconnect the No. 2 fuel pressure sensor (for low pressure side) connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (for K120):

Tester Connection

Condition

Specified Condition

F5-1 (VC) - C76-84 (VCPF)

Always

Below 1 Ω

Standard Resistance (for K121):

Tester Connection

Condition

Specified Condition

F5-1 (VC) - C160-147 (VCPF)

Always

Below 1 Ω
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK TERMINAL VOLTAGE (NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))

*a

Front view of wire harness connector

(to No. 2 Fuel Pressure Sensor (for Low Pressure Side))

(a) Disconnect the No. 2 fuel pressure sensor (for low pressure side) connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

F5-2 (PFL) - Body ground

Ignition switch ON

4.4 to 5.6 V
OK

REPLACE ECM

NG

5.

CHECK HARNESS AND CONNECTOR (NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE) - ECM)

(a) Disconnect the No. 2 fuel pressure sensor (for low pressure side) connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (for K120):

Tester Connection

Condition

Specified Condition

F5-2 (PFL) or C76-107 (PFL) - Body ground and other terminals

Always

10 kΩ or higher

Standard Resistance (for K121):

Tester Connection

Condition

Specified Condition

F5-2 (PFL) or C160-149 (PFL) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR