Toyota Yaris: Sfi System / Fuel Rail Pressure Sensor (Low) Circuit Short to Battery or Open (P107A15)

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 Battery or Open (P107A15)

DESCRIPTION

Refer to DTC P107A11.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P107A15

Fuel Rail Pressure Sensor (Low) Circuit Short to Battery or Open

The No. 2 fuel pressure sensor (for low pressure side) output voltage is higher than 4.85 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: P107D

HINT:

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

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DTC No.

Fuel Pressure (Low) / Fuel Pressure 2

Malfunction

P107A15

Approximately 750 kPag or higher

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

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: P107A15.
  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

Refer to DTC P107A11.

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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

E4-3(E2) - Body ground

Ignition switch off

Below 1 Ω

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).

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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

E4-3(E2) - D104-119(EPFL)

Always

Below 1 Ω

E4-2(PFL) - D104-121(PFL)

Always

Below 1 Ω

E4-2(PFL) or D104-121(PFL) - Other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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