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Inspection Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY) 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch to the ON position and turn the tester on.
    3. Select the following menu items: Powertrain / Engine and ECT / 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  

  2. CHECK ECM POWER SOURCE CIRCUIT 

    NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

    OK: Go To Next Step 

  3. INSPECT ENGINE ROOM J/B (C/OPN RELAY) 
    1. Remove the engine room J/B from the engine room R/B.
    2. Inspect the C/OPN relay.
      1. Measure the C/OPN relay resistance.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Specified Condition
        1E-7 - 1E-13 10 kΩ or higher
        Below 1 Ω (Apply battery voltage between terminals 1D-12 and 1E-8)
    3. Reinstall the engine room J/B.
      4. Fig 1: Identifying 1E Engine Room J/B Connector
      G04973333Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ENGINE ROOM J/B 

    OK: Go To Next Step 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Disconnect the A24 and C24 ECM connectors.
    2. Measure the voltage between the terminals of the A24 and C24 ECM connectors.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      A24-7(FC) - C24-104(E1) 9 to 14 V
    3. Reconnect the ECM connectors.
      4. Fig 2: Identifying ECM Connectors
      G04973334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: Go To Next Step 

  5. INSPECT FUEL PUMP 

    NG: REPLACE FUEL PUMP 

    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 J/B and the fuel pump.
      1. Remove the engine room J/B from the engine room R/B.
      2. Disconnect the 1E engine room J/B connector.
      3. Disconnect the N10 fuel pump connector.
      4. Measure the resistance between the terminals.

        Standard resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION CHART (FOR OPEN)

        Tester Connection Specified Condition
        1E-13 - N10-4 (Fuel pump) Below 1 Ω

        Standard resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION CHART (FOR SHORT)

        Tester Connection Specified Condition
        1E-13 or N10-4 (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 N10 fuel pump connector.
      2. Measure the resistance.

        Standard resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION CHART (FOR OPEN)

        Tester Connection Specified Condition
        N10-5 (Fuel pump) - Body ground Below 1 Ω
    3. Reconnect the engine room J/B connector.
    4. Reconnect the fuel pump connector.
    5. Reinstall the engine room J/B.
      6. Fig 3: Checking Harness And Connector (C/OPN Relay - Fuel Pump - Body Ground)
      G04973335Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM (See  REMOVAL   ) 

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