LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2009 >> Avalon Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control System (2GR-FE) >> SFI System >> Circuit Test >> Fuel Pump Control Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY) 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch to ON and turn the tester on.
    3. Select the following menu items: Powertrain/Engine/Active Test/Control the Fuel Pump/Speed.
    4. Check whether the fuel pump operation sound occurs when performing the Active Test on the tester.

      OK: 

      Fuel pump operating sound occurs. 

      NG: Go to step 2 

      OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

  2. CHECK ECM POWER SOURCE CIRCUIT 

    NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

    OK: Go to next step 

  3. INSPECT ENGINE ROOM JUNCTION BLOCK (C/OPN RELAY) 
    1. Remove the engine room junction block from the engine room R/B.
    2. Measure the C/OPN relay resistance.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      1D-5 - 1D-3 10 kΩ or higher
      Below 1 Ω (Battery voltage applied between terminals 1G-5 and 1H-9)
    3. Reinstall the engine room junction block.

      NG: REPLACE ENGINE ROOM JUNCTION BLOCK 

      Fig 1: Identifying Engine Room Junction Block Connector
      G06227212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Disconnect the ECM connectors.
    2. Measure the voltage between the terminals of the ECM connectors.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION

      Tester Connection Specified Condition
      A55-7 (FC) - B50-81 (E1) 9 to 14 V
    3. Reconnect the ECM connectors.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY) 

      Fig 2: Identifying B50 And A55 ECM Connector Terminals
      G05404758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  5. INSPECT FUEL PUMP 

    NG: REPLACE FUEL PUMP  (See REMOVAL )

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP - BODY GROUND) 
    1. Check the harness and the connectors between the engine room relay block and the fuel pump.
      1. Disconnect the integration relay connector.
      2. Disconnect the fuel pump connector.
      3. Measure the resistance.

        Standard resistance (Check for open) 

        RESISTANCE SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        1D-3 - K7-4 (Fuel pump) Below 1 Ω

        Standard resistance (Check for short) 

        RESISTANCE SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        1D-3 or K7-4 (Fuel pump) - Body ground 10 kΩ or higher
    2. Check the harness and the connectors between the fuel pump and body ground.
      1. Disconnect the fuel pump connector.
      2. Measure the resistance.

        Standard resistance (Check for open) 

        RESISTANCE SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        K7-5 (Fuel pump) - Body ground Below 1 Ω
    3. Reconnect the integration relay connector.
    4. Reconnect the fuel pump connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying Engine Room Junction Block And Fuel Pump Connector
      G04996512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE ECM (See  REMOVAL   ) 

scientia non olet · About LEMON Manuals