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Inspection Procedure

  1. PERFORM ACTIVE TEST BY TECHSTREAM (OPERATION OF CIRCUIT OPENING 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 operating sounds can be heard while operating the relay using the tester.

      OK: 

      Operating sounds can be heard from relay. 

    OK:  Go to step  7

    NG: Go to next step 

  2. INSPECT ECM POWER SOURCE CIRCUIT 
    1. Inspect the ECM power source circuit (See ECM POWER SOURCE CIRCUIT  ).

    NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

    OK: Go to next step 

  3. INSPECT CIRCUIT OPENING RELAY 
    1. Remove the circuit opening relay from the instrument panel J/B.
      2. Fig 1: Identifying Circuit Opening Relay
      G05192682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the circuit opening relay resistance.

      Standard resistance 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      3 - 5 10 kΩ. or higher
      3 - 5 Below 1 Ω (when battery voltage applied to terminals 1 and 2)
    3. Reinstall the circuit opening relay.

    NG: REPLACE CIRCUIT OPENING RELAY 

    OK: Go to next step 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch to the ON position.
    2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

      Standard voltage 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      FC (E6-10) - E1 (E3-5) Between 9 V and 14 V
      Fig 2: Identifying ECM (FC Voltage)
      G05192683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

    NG: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - CIRCUIT OPENING RELAY) 
    1. Disconnect the I11 ignition switch connector.
      2. Fig 3: Identifying Harness And Connector (Ignition Switch - Circuit Opening Relay)
      G05232936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Check the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      IG2 (I11-6) - Instrument panel J/B (Circuit opening relay terminal 1) Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      IG2 (I11-6) or Instrument panel J/B (Circuit opening relay terminal 1) - Body ground 10 kΩ or higher
    4. Reinstall the circuit opening relay.
    5. Reconnect the ignition switch connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (ECM - CIRCUIT OPENING RELAY) 
    1. Disconnect the E6 ECM connector.
      2. Fig 4: Identifying Harness And Connector (ECM - Circuit Opening Relay)
      G05192685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Check the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      FC (E6-10) - Instrument panel J/B (Circuit opening relay terminal 2) Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      FC (E6-10) or Instrument panel J/B (Circuit opening relay terminal 2) - Body ground 10 kΩ or higher
    4. Reinstall the circuit opening relay.
    5. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

  7. INSPECT FUEL PUMP 
    1. Inspect the fuel pump (See INSPECTION ).

    NG: REPLACE FUEL PUMP 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    1. Remove the circuit opening relay from the instrument panel J/B.
      2. Fig 5: Identifying Harness And Connector (Circuit Opening Relay - Fuel Pump, Fuel Pump - Body Ground)
      G05192686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the F10 fuel pump connector.
    3. Check the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 3) - Fuel pump (F10-4) Below 1 Ω
      Fuel pump (F10-5) - Body ground Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 3) or Fuel pump (F10-4) - Body ground 10 kΩ or higher
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: CHECK AND REPAIR HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 

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