Toyota Yaris: Sfi System / Fuel Rail Pressure Sensor (Low) Circuit Short to Ground (P107A11)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Fuel Rail Pressure Sensor (Low) Circuit Short to Ground (P107A11)

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

Note

P107A11

Fuel Rail Pressure Sensor (Low) Circuit Short to Ground

The No. 2 fuel pressure sensor (for low pressure side) output voltage is less than 0.43 V for 3 seconds or more (1 trip detection logic).

  • 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

SAE: P107C

HINT:

When a DTC is output, check the Data List item "Fuel Pressure (Low) / Fuel Pressure 2" using the GTS.

Click here

DTC No.

Fuel Pressure (Low) / Fuel Pressure 2

Malfunction

P107A11

Approximately 0 kPag

  • Short to ground in PFL circuit
  • Short in PFL to EPR circuit
  • Open in VCPR circuit

If the Data List displays a normal value, the normal value may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

This DTC is stored if the No. 2 fuel pressure sensor (for low pressure side) output voltage is out of the standard range due to an open or short in the sensor circuit.

MONITOR STRATEGY

Required Sensors/Components (Main)

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

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS 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 GTS 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. Input the DTC: P107A11.
  13. 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

    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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

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.

CHECK HARNESS AND CONNECTOR

HINT:

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

(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

E4-1(VC) - E4-3(E2)

Ignition switch ON

4.5 to 5.5 V

E4-2(PFL) - E4-3(E2)

Ignition switch ON

3.0 to 5.0 V

*a

Front view of wire harness connector

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

(d) Turn the ignition switch off and wait for at least 30 seconds.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E4-1(VC) - E4-2(PFL)

Ignition switch off

171 to 189 kΩ

HINT:

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

Click here

OK

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

NG

2.

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:

Tester Connection

Condition

Specified Condition

E4-1(VC) - D104-120(VCPF)

Always

Below 1 Ω

E4-2(PFL) or D104-121(PFL) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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