СИСТЕМА SFI Fuel Pump Control Circuit

DESCRIPTION

Refer to DTC P0230 Click here.

WIRING DIAGRAM

Refer to DTC P0230 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FUEL PUMP OPERATION


    1. Check if there is pressure in the fuel inlet hose.

      Tech Tips

      If there is fuel pressure, you will hear the sound of fuel flowing.


    OK

    INSPECT RELAY (Marking: F/PMP) Click here

    NG

  2. PERFORM ACTIVE TEST (OPERATE OF CIRCUIT OPENING RELAY)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Fuel Pump / Speed.

    4. Check whether operating sounds can be heard while operating the relay using the relay.

      OK
      Operating noise can be heard from the relay.

    OK

    INSPECT ECM POWER SOURCE CIRCUIT Click here

    NG

  3. INSPECT INTEGRATION NO.1 RELAY (C/OPN RELAY)

    A01DZ2WE11

    1. Remove the integration relay from the engine room junction block.

    2. Measure the voltage of the C/OPN relay.

      Standard voltage
      Terminal Connection Condition Specified Condition
      1J-8 - Body ground Ignition switch ON 10 to 14 V

    NG

    REPLACE INTEGRATION NO.1 RELAY

    OK

  4. INSPECT ECM (FC VOLTAGE)

    A01DYW0E33

    1. Turn the ignition switch ON.

    2. Measure the voltage of the ECM connectors.

      Standard voltage:
      Tester Connection Specified Condition
      E14-10 (FC) - E17-1 (E1) 9 to 14 V

    OK

    REPLACE ECM

    NG

    CHECK AND REPAIR HARNESS AND CONNECTOR (ECM - INTEGRATION RELAY, INTEGRATION RELAY - IGNITION SWITCH)

  5. INSPECT ECM POWER SOURCE CIRCUIT


    NG

    REPAIR OR REPLACE

    OK

  6. INSPECT RELAY (Marking: F/PMP)

    A01DYG8E01

    1. Remove the F/PMP relay from the engine room relay block.

    2. Measure the resistance of the relay.

      Standard resistance
      Tester Connection Specified Condition
      3 - 4 Below 1 Ω
      3 - 5 10 kΩ or higher
      3 - 4

      10 kΩ or higher

      (when battery voltage applied to terminals 1 and 2)
      3 - 5

      Below 1 Ω

      (when battery voltage applied to terminals 1 and 2)

    NG

    REPLACE RELAY

    OK

  7. INSPECT FUEL PUMP

    A01DZJBE08

    1. Inspect fuel pump resistance.


      1. Measure the resistance between terminals 4 and 5.

        Standard resistance
        0.2 to 3.0 Ω at 20°C (68°F)

    2. Inspect fuel pump operation.


      1. Apply battery voltage to both terminals. Check that the pump operates.

      Note


      • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.

      • Keep the fuel pump as far away from the battery as possible.

      • Always perform the switching at the battery side.


    NG

    REPLACE FUEL PUMP

    OK

  8. CHECK WIRE HARNESS (FUEL PUMP - F/PMP RELAY, FUEL PUMP - BODY GROUND)

    A01DZ0FE01

    1. A01E1MIE01

      Check the wire harness between the fuel pump and fuel pump relay.


      1. Disconnect the F15 fuel pump connector.

      2. Remove the F/PMP relay from the engine room relay block.

      3. Measure the resistance of the wire harness side connectors.

        Standard resistance
        Tester Connection Specified Condition
        F15-4 - F/PMP relay (4) Below 1 Ω
        F15-4 or F/PMP relay (4) - Body ground 10 kΩ or higher

    2. Check the wire harness between the fuel pump and body ground.


      1. Disconnect the F15 fuel pump connector.

      2. Measure the resistance of the wire harness side connector.

        Standard resistance
        Tester Connection Specified Condition
        F15-5 - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  9. CHECK WIRE HARNESS (INTEGRATION RELAY - F/PMP RELAY)

    A01DWHGE01

    1. Disconnect the 1J integration relay connector from the engine room junction block.

    2. Remove the F/PMP relay from the engine room relay block.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      1J-8 - Fuel pump relay (3) Below 1 Ω
      1J-8 or Fuel pump relay (3) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    CHECK AND REPAIR INTEGRATION NO.1 RELAY

  10. INSPECT RELAY (Marking: F/PMP)

    A01DYG8E01

    1. Remove the F/PMP relay from the engine room relay block.

    2. Measure the resistance of the relay.

      Standard resistance
      Tester Connection Specified Condition
      3 - 4 Below 1 Ω
      3 - 5 10 kΩ or higher
      3 - 4

      10 kΩ or higher

      (when battery voltage applied to terminals 1 and 2)
      3 - 5

      Below 1 Ω

      (when battery voltage applied to terminals 1 and 2)

    NG

    REPLACE RELAY

    OK

  11. INSPECT FUEL PUMP RESISTOR (RESISTANCE)

    A01DXN8E01

    1. Inspect the fuel pump resistor resistance.


      1. Measure the resistance.

        Standard resistance
        0.70 to 0.76 Ω at 20°C (68°F)

    NG

    REPLACE FUEL PUMP RESISTOR

    OK

  12. CHECK WIRE HARNESS (F/PMP RELAY - FUEL PUMP RESISTOR, FUEL PUMP RESISTOR - FUEL PUMP)

    A01DX8IE01

    1. A01E25QE01

      Check the wire harness between the F/PMP relay and fuel pump resistor.


      1. Remove the fuel pump relay from the engine room relay block.

      2. Disconnect the F20 fuel pump resistor connector.

      3. Measure the resistance of the wire harness side connectors.

        Standard resistance
        Tester Connection Specified Condition
        F/PMP relay (5) - F20-1 (+B) Below 1 Ω
        F/PMP relay (5) or F20-1 (+B) - Body ground 10 kΩ or higher

    2. Check the wire harness between the fuel pump relay and fuel pump.


      1. Disconnect the F20 fuel pump resistor connector.

      2. Disconnect the F15 fuel pump connector.

      3. Measure the resistance of the wire harness side connectors.

        Standard resistance
        Tester Connection Specified Condition
        F20-2 (FP) - F15-4 Below 1 Ω
        F20-2 (FP) or F15-4 - Body ground 10 kΩ or higher

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR