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Inspection Procedure

When using intelligent tester: 

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATION OF CIRCUIT OPENING RELAY) 
    1. Connect an intelligent tester to the DLC3.
    2. Turn the ignition switch to ON and turn the tester ON.
    3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/ SPD.
    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   6 

    NG: GO TO NEXT STEP 

  2. INSPECT ECM POWER SOURCE CIRCUIT 
    1. Inspect the 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. Check the circuit opening relay resistance.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

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

    NG: REPLACE CIRCUIT OPENING RELAY 

    Fig 1: Identifying Relay Test Terminals
    G04460871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals of the E3 and E5 ECM connectors.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      FC (E5-16) - E01 (E3-7) Between 9 V and 14 V

    OK: REPLACE ECM 

    Fig 2: Identifying Terminals Of E3 And E5 ECM Connectors
    G04460872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO TO NEXT STEP 

  5. CHECK HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 
    1. Disconnect the EFI relay from the engine room R/B.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS (FOR OPEN)

      Tester Connections Specified Conditions
      EFI relay (1) - Circuit opening relay (1) Below 1
      EFI relay (3) - Circuit opening relay (5) Below 1

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS (FOR SHORT)

      Tester Connections Specified Conditions
      EFI relay (1) or Circuit opening relay (1) - Body ground 10 k or higher
      EFI relay (3) or Circuit opening relay (5) - Body ground 10 k or higher
    4. Reinstall the circuit opening relay.
    5. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Identifying EFI And Circuit Opening Relay Connector Terminals
    G04460873Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

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

    NG: REPLACE FUEL PUMP 

    OK: GO TO NEXT STEP 

  7. 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. Disconnect the F10 fuel pump connector.
    3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS (FOR OPEN)

      Tester Connections Specified Conditions
      Circuit opening relay (3) - Fuel pump (F10-4) Below 1
      Fuel pump (F10-5) - Body ground Below 1

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS (FOR SHORT)

      Tester Connections Specified Conditions
      Circuit opening relay (3) or Fuel pump (F10-4) - Body ground 10 k or higher
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 4: Identifying Circuit Opening Relay And Fuel Pump Connector Terminals
    G04460874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

When Using OBD II Scan Tool: 

  1. CHECK FUEL PUMP (OPERATION) 
    1. Turn the ignition switch to ON.
    2. Connect terminals FC and E01 of the ECM connector.
    3. Measure for fuel pump operating sounds.

      Result: Operating sounds can be heard from fuel pump. 

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

    Fig 5: Connecting Terminals FC And E01 Of ECM Connector
    G04460875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO TO NEXT STEP 

  2. INSPECT ECM POWER SOURCE CIRCUIT 
    1. Inspect the 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. Measure the circuit opening relay resistance.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS

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

    NG: REPLACE CIRCUIT OPENING RELAY 

    Fig 6: Identifying Relay Test Terminals
    G04460871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals of the E3 and E5 ECM connectors.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      FC (E5-16) - E1 (E3-7) Between 9 V and 14 V

    OK: REPLACE ECM 

    Fig 7: Identifying Terminals Of E3 And E5 ECM Connectors
    G04460877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO TO NEXT STEP 

  5. CHECK HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 
    1. Remove the EFI relay from the engine room R/B.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS (FOR OPEN)

      Tester Connections Specified Conditions
      EFI relay (1) - Circuit opening relay (1) Below 1
      EFI relay (1) - Circuit opening relay (5) Below 1

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS (FOR SHORT)

      Tester Connections Specified Conditions
      EFI relay (1) or Circuit opening relay (1) - Body ground 10 k or higher
      EFI relay (3) or Circuit opening relay (5) - Body ground 10 k or higher
    4. Reinstall the circuit opening relay.
    5. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 8: Identifying EFI And Circuit Opening Relay Connector Terminals
    G04460878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

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

    NG: REPLACE FUEL PUMP 

    OK: GO TO NEXT STEP 

  7. 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. Disconnect the F10 fuel pump connector.
    3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS (FOR OPEN)

      Tester Connections Specified Conditions
      Circuit opening relay (3) - Fuel pump (F10-4) Below 1
      Fuel pump (F10-5) - Body ground Below 1

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS (FOR SHORT)

      Tester Connections Specified Conditions
      Circuit opening relay (3) or Fuel pump (F10-4) - Body ground 10 k or higher
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 9: Identifying Circuit Opening Relay And Fuel Pump Connector Terminals
    G04460879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

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