Toyota Yaris: Sfi System / Fuel Pump "A" Control Circuit Short to Ground or Open (P062714)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Fuel Pump "A" Control Circuit Short to Ground or Open (P062714)

DESCRIPTION

Refer to DTC P062712.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P062714

Fuel Pump "A" Control Circuit Short to Ground or Open

When the fuel pump control ECU operation duty ratio is 3 to 65%, the FPC terminal voltage is a certain value or less for 3 seconds or more (1 trip detection logic).

  • Open or short in fuel pump control ECU circuit
  • Fuel pump control ECU
  • EFI-MAIN NO. 2 relay
  • ECM

-

SAE: P0628

Related Data List

DTC No.

Data List

P062714

Fuel Pump Control Duty Ratio

MONITOR DESCRIPTION

The ECM monitors the fuel pump control ECU operation signals.

When the output duty ratio of the operation signal from the ECM is 3 to 65% and the FPC terminal voltage is a certain value or less for 3 seconds or more, the ECM stores a DTC.

MONITOR STRATEGY

Required Sensors/Components

Fuel pump control ECU

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. Turn the ignition switch to ON.
  7. Turn the GTS on.
  8. Start the engine and wait 10 seconds or more.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes.
  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: P062714.
  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 is malfunctioning.
    • If the judgment result is INCOMPLETE, run the engine at an engine speed of 2500 rpm or more for 10 seconds or more and check the DTC judgment result again.

WIRING DIAGRAM

Refer to DTC P062712.

Click here

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 (POWER SOURCE OF FUEL PUMP CONTROL ECU)

(a) Disconnect the fuel pump control ECU 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

O2-1 (+B) - O2-3 (GND)

Ignition switch ON

11 to 14 V

*a

Front view of wire harness connector

(to Fuel Pump Control ECU)

NG

GO TO STEP 4

OK

2.

INSPECT ECM (FPC TERMINAL)

(a) Disconnect the fuel pump control ECU connector.

(b) Operate the fuel pump control ECU using the Active Test function and measure the resistance according to the value(s) in the table below.

Powertrain > Engine > Active Test

Tester Display

Fuel Pump Single Phase Energization

Standard Resistance:

Tester Connection

GTS Operation

Specified Condition

O2-2 (FPC) - Body ground

Before Active Test → During Active Test

Before Active Test: Resistance is stable → During Active Test: Resistance fluctuates*

HINT:

*: Using the Active Test, duty control of the transistors in the ECM will be performed. Due to the duty control, resistance of the FPC terminal will be unstable during the Active Test. If the resistance is stable before the Active Test and fluctuates while performing the Active Test, it can be determined that the transistor is operating. If the transistor does not operate during the Active Test, the ECM may be malfunctioning.

OK

REPLACE FUEL PUMP CONTROL ECU

NG

3.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)

(a) Disconnect the fuel pump control ECU 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

O2-2(FPC) - A106-6(FPC)

Always

Below 1 Ω

O2-2(FPC) or A106-6(FPC) - Body ground

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - BODY GROUND)

(a) Disconnect the fuel pump control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O2-3 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT EFI-MAIN NO. 2 RELAY

Click here

NG

REPLACE EFI-MAIN NO. 2 RELAY

OK

6.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF EFI-MAIN NO. 2 RELAY)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 5 luggage room relay block assembly.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

3 (EFI-MAIN NO. 2 relay) - Body ground

Always

11 to 14 V

*1

No. 5 Luggage Room Relay Block Assembly

*2

EFI-MAIN NO. 2 Relay

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - EFI-MAIN NO. 2 RELAY)

OK

7.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - BODY GROUND)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 5 luggage room relay block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (EFI-MAIN NO. 2 relay) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - EFI-MAIN NO. 2 RELAY)

(a) Disconnect the fuel pump control ECU connector.

(b) Remove the EFI-MAIN NO. 2 relay from the No. 5 luggage room relay block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O2-1 (+B) - 5 (EFI-MAIN NO. 2 relay)

Always

Below 1 Ω

O2-1 (+B) or 5 (EFI-MAIN NO. 2 relay) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 2 RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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