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Fuel Pump Control Circuit [06/2017 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FUEL LEAK 
    1. Check around and beneath the vehicle for fuel leaks, fumes, etc.

      OK

      No fuel leaks present.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE FUEL LEAK POINT 

    Result: 

    OK 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE CIRCUIT RELAY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the Circuit Relay

      Standard

      Techstream Operation Standard
      ON Operating sounds can be heard from fuel pump (for low pressure side)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO) 
    1. Install the fuel pressure gauge (for low pressure line of low pressure side).

      Refer to PROCEDURE - Step 2

    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

      Powertrain > Engine > Active Test 

      Active Test Display
      Control the Fuel Pump Duty Ratio
      Data List Display
      Fuel Pressure (Low) / Fuel Pressure 2

      Standard

      Techstream Operation Standard
      Low Data List value and fuel pressure gauge are within +/-50 kPag of each other
      High

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

      Refer to INITIALIZATION [06/2017 - 08/2018] , or refer to INITIALIZATION [08/2018 - 09/2019] , or refer to INITIALIZATION [09/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY (FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)). Refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  4

  4. READ VALUE USING TECHSTREAM (FUEL PRESSURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Target Fuel Pressure (Low) / Target Fuel Pressure 2, Fuel Pressure (Low) / Fuel Pressure 2 and Low Fuel Pressure Sensor.

      Powertrain > Engine > Data List 

      Tester Display
      Target Fuel Pressure (Low) / Target Fuel Pressure 2
      Fuel Pressure (Low) / Fuel Pressure 2
      Low Fuel Pressure Sensor

      Result

      Result Proceed to
      Low Fuel Pressure Sensor value is within +/- 65 kPag of the Target Fuel Pressure (Low) / Target Fuel Pressure 2 A
      Low Fuel Pressure Sensor value is more than 65 kPag higher than the Target Fuel Pressure (Low) / Target Fuel Pressure 2 B
      Low Fuel Pressure Sensor value is more than 65 kPag lower than the Target Fuel Pressure (Low) / Target Fuel Pressure 2 C

    Result: 

    B 

    REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE) 

    Refer to REMOVAL [06/2017 - 09/2019] , or refer to REMOVAL [09/2019 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    HINT: 

    Relief blockage such as clogging of the jet pump is suspected.

    Result: 

    C 

    See step  7

    Result: 

    A 

    See step  5

  5. CHECK FUEL PRESSURE 
    1. Install the fuel pressure gauge (for low pressure line of low pressure side).

      Refer to PROCEDURE - Step 2

    2. Start the engine.
    3. Measure the fuel pressure at idle.

      Standard Fuel Pressure

      300 to 530 kPa (3.1 to 5.4 kgf/cm2 , 44 to 77 psi)

      HINT: 

      Refer to Standard Idle Speed.

      Refer to PROCEDURE - Step 10 [06/2017 - 09/2019] , or refer to PROCEDURE - Step 10 [09/2019 - ]

    4. Stop the engine.
    5. Check that the fuel pressure remains as specified for 5 minutes.

      Standard Fuel Pressure

      98 kPa (1.0 kgf/cm2 , 14.2 psi) or more

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

      Refer to INITIALIZATION [06/2017 - 08/2018] , or refer to INITIALIZATION [08/2018 - 09/2019] , or refer to INITIALIZATION [09/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE). Refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK SHORTAGE OF FUEL 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. In accordance with the display on the Techstream, check the value of Freeze Frame Data item "Fuel Remaining Volume" stored when the DTC was detected.

      Powertrain > Engine > DTC (P0087-00) > Freeze Frame Data 

      Tester Display
      Fuel Remaining Volume

      Standard

      Freeze Frame Data Item Specified Condition
      Fuel Remaining Volume 16% or more

      HINT: 

      • DTC P0087-00 may be stored if the vehicle temporarily ran out of fuel when the amount of fuel was low.
      • If Freeze Frame Data item "Fuel Remaining Volume" is not displayed, based on the interview with the customer, check if the low fuel level warning was not displayed when the MIL illuminated.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2017 - 08/2018]  , or refer to  PROBLEM SYMPTOMS TABLE [08/2018 - ] 

    Result: 

    NG 

    END 

  7. CHECK SHORTAGE OF FUEL 
    1. Check the amount of fuel remaining.

      HINT: 

      • No fuel remains in the fuel tank: Malfunction of the fuel sender gauge assembly is suspected.
      • Only the fuel pump side fuel chamber has no fuel remaining: Malfunction of the jet pump is suspected.
      • Fuel remains in the fuel tank: Malfunction of the fuel pump (for low pressure side) is suspected.
      • Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

        Refer to INITIALIZATION [06/2017 - 08/2018] , or refer to INITIALIZATION [08/2018 - 09/2019] , or refer to INITIALIZATION [09/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE). Refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

  8. PERFORM ACTIVE TEST USING TECHSTREAM (FUEL PUMP SINGLE PHASE ENERGIZATION) 
    GTY995919Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Fuel Pump (for low pressure side))
    1. Disconnect the fuel pump (for low pressure side) connector.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Powertrain / Engine / Active Test / Fuel Pump Single Phase Energization.

      Powertrain > Engine > Active Test 

      Tester Display
      Fuel Pump Single Phase Energization
    6. Operate the fuel pump control ECU using the Active Test function and measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection GTS Operation Specified Condition
      R43-3 (BLPU) - Body ground U Phase 4.4 to 8.4 V*
      R43-4 (BLPV) - Body ground V Phase 4.4 to 8.4 V*
      R43-2 (BLPW) - Body ground W Phase 4.4 to 8.4 V*

      HINT: 

      • *: This Active Test restricts the fuel pump control ECU output duty cycle to 50%. Therefore, the output voltage of the fuel pump control ECU will be approximately 50% of the power source voltage.
      • Before performing this inspection, check that the battery voltage is between 11 and 14 V (not depleted).
      • Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

        Refer to INITIALIZATION [06/2017 - 08/2018] , or refer to INITIALIZATION [08/2018 - 09/2019] , or refer to INITIALIZATION [09/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE). Refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - FUEL PUMP (FOR LOW PRESSURE SIDE)) 
    1. Disconnect the fuel pump control ECU connector.
    2. Disconnect the fuel pump (for low pressure side) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R17-2 (FPU) - R43-3 (BLPU) Always Below 1 Ω
      R17-3 (FPV) - R43-4 (BLPV) Always Below 1 Ω
      R17-4 (FPW) - R43-2 (BLPW) Always Below 1 Ω
      R17-2 (FPU) or R43-3 (BLPU) - Body ground and other terminals Always 10 kΩ or higher
      R17-3 (FPV) or R43-4 (BLPV) - Body ground and other terminals Always 10 kΩ or higher
      R17-4 (FPW) or R43-2 (BLPW) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF FUEL PUMP CONTROL ECU) 
    GTY994110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Fuel Pump Control ECU)
    1. Disconnect the fuel pump control ECU connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      R18-1 (+B) - R18-3 (GND) Engine switch on (IG) 11 to 14 V

      HINT: 

      Make a note of the measured voltage as it may be used in a following Active Test.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  11

  11. INSPECT ECM (FPC TERMINAL) 
    GTY994111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Fuel Pump Control ECU)
    1. Disconnect the fuel pump control ECU connector.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Powertrain / Engine / Active Test / Fuel Pump Single Phase Energization.

      Powertrain > Engine > Active Test 

      Tester Display
      Fuel Pump Single Phase Energization
    6. Operate the fuel pump control ECU using the Active Test function and measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Techstream Operation Specified Condition
      R18-2 (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.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FUEL PUMP CONTROL ECU. Refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM) 
    1. Disconnect the fuel pump control ECU connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R18-2 (FPC) - A21-18 (FPC) Always Below 1 Ω
      R18-2 (FPC) or A21-18 (FPC) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - 08/2022]  , or refer to  REMOVAL [08/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  13. CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - BODY GROUND) 
    1. Disconnect the fuel pump control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R18-3 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE OF EFI-MAIN NO. 2 RELAY) 
    1. Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. 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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  15

  15. INSPECT EFI-MAIN NO. 2 RELAY 
    1. Inspect the EFI-MAIN NO. 2 relay.

      Refer to ON-VEHICLE INSPECTION [06/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE EFI-MAIN NO. 2 RELAY 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - ECM) 
    1. Remove the EFI-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (EFI-MAIN NO. 1 relay) - A21-46 (MREL) Always Below 1 Ω
      2 (EFI-MAIN NO. 1 relay) or A21-46 (MREL) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 2 RELAY) 
    1. Remove the EFI-MAIN NO. 1 and EFI-MAIN NO. 2 relays from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (EFI-MAIN NO. 1 relay) - 2 (EFI-MAIN NO. 2 relay) Always Below 1 Ω
      5 (EFI-MAIN NO. 1 relay) or 2 (EFI-MAIN NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  18

  18. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - BODY GROUND) 
    1. Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. 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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - FUEL PUMP CONTROL ECU) 
    1. Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the fuel pump control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (EFI-MAIN NO. 2 relay) - R18-1 (+B) Always Below 1 Ω
      5 (EFI-MAIN NO. 2 relay) or R18-1 (+B) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    GO TO ECM POWER SOURCE CIRCUIT. Refer to  ECM Power Source Circuit [06/2017 - ]  

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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