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Inspection Procedure

Hand-held tester: 

  1. CHECK FUEL PUMP OPERATION (See  ON-VEHICLE INSPECTION  ) 
    1. Check if there is pressure in the fuel inlet hose.

      HINT:

      If there is fuel pressure, you will hear the fuel flowing sound.

    OK: Go to step   10 

    NG: GO TO NEXT STEP. 

  2. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE CIRCUIT OPENING RELAY) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch to ON and turn the hand-held tester ON.
    3. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
    4. Check the relay operation when it is operated by the hand-held tester.

      Standard: Operating sound can be heard from the relay. 

    OK: Go to step   5 

    NG: GO TO NEXT STEP. 

  3. INSPECT CIRCUIT OPENING RELAY 
    1. Remove the circuit opening relay from the engine room R/B.
    2. Check for continuity in the circuit opening relay.

      Standard: 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      1 - 2 Continuity
      3 - 5 No continuity
      3 - 5 Continuity (Apply battery voltage to terminals 1 and 2)
      Fig 1: Identifying Relay Test Terminals
      G04036614Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 ON.
    2. Measure the voltage between the terminals of the E6 and E8 ECM connectors.

      Standard: 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      FC (E8-10) - E1 (E6-1) 9 to 14 V
      Fig 2: Identifying ECM Connectors/Terminals
      G04337131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM (See  ECM (2UZ-FE)  ) 

    NG: CHECK AND REPAIR HARNESS AND CONNECTOR (ECM - CIRCUIT OPENING RELAY, CIRCUIT OPENING RELAY - IGNITION SWITCH) 

  5. CHECK FOR ECM POWER SOURCE CIRCUIT (See  ECM POWER SOURCE CIRCUIT   ) 

    NG: REPAIR OR REPLACE 

    OK: GO TO NEXT STEP. 

  6. INSPECT FUEL PUMP RELAY ASSY 
    1. Remove the fuel pump relay from the engine room R/B.
    2. Check for continuity in the fuel pump relay.

      Standard: 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      1 - 2
      3 - 4      		 Continuity
      3 - 5 No continuity
      3 - 5 Continuity (Apply battery voltage to terminals 1 and 2)
      Fig 3: Identifying Relay Test Terminals
      G04333756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the fuel pump relay.

    NG: REPLACE FUEL PUMP RELAY ASSY 

    OK: GO TO NEXT STEP. 

  7. INSPECT FUEL PUMP 
    1. Inspect fuel pump resistance.
      1. Disconnect the F14 fuel pump connector.
      2. Measure the resistance between the terminals of the fuel pump connector.

        Standard: 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        4 - 5 0.2 to 3.0 at 20°C (68°F)
      3. Reconnect the fuel pump connector.
    2. Inspect fuel pump operation
      1. Apply battery voltage to both terminals. Check that the pump operates.
      NOTE:
      • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
      • Keep fuel pump as far away from the battery as possible.
      • Always do the switching at the battery side.
        Fig 4: Identifying F14 Fuel Pump Connector Terminals
        G04337133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUEL PUMP 

    OK: GO TO NEXT STEP. 

  8. CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP RELAY, FUEL PUMP - BODY GROUND) 
    1. Check the harness and connector between the fuel pump and fuel pump relay.
      1. Disconnect the F14 fuel pump connector.
      2. Remove the fuel pump relay from the engine room R/B.
      3. Check for continuity between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Fuel pump (F14-4) - Engine room R/B (Fuel pump relay terminal 4) Below 1
      Fig 5: Identifying F14 Fuel Pump Connector Terminals - Wire Harness Side
      G04337134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Fuel pump (F14-4) or Engine room R/B (Fuel pump relay terminal 4) - Body ground 10 k or higher
    2. Check the harness and connector between the fuel pump and body ground.
      1. Disconnect the F14 fuel pump connector.
      2. Check for continuity between the wire harness side connector and body ground.

        Standard (Check for open): 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        Engine room R/B (Fuel pump relay terminal 5) - Body ground Below 1
        Fig 6: Identifying Fuel Pump Relay
        G04337135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP. 

  9. CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP RELAY) 
    1. Remove the circuit opening relay from the engine room R/B.
    2. Remove the fuel pump relay from the engine room R/B.
    3. Check for continuity between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Circuit opening relay (3) - Engine room R/B (Fuel pump relay terminal 3) Below 1
      Fig 7: Identifying Circuit Opening Relay Location
      G04337136Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Circuit opening relay (3) or Engine room R/B (Fuel pump relay terminal 3) - Body ground 10 k or higher
      Fig 8: Identifying Fuel Pump Relay location
      G04337137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reinstall the circuit opening relay.
    5. Reinstall the fuel pump relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

  10. INSPECT FUEL PUMP RELAY ASSY 
    1. Remove the fuel pump relay from the engine room R/B.
    2. Check for continuity in the fuel pump relay.

      Standard: 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      1 - 2
      3 - 4      		 Continuity
      3 - 5 No continuity
      3 - 5 Continuity (Apply battery voltage to terminals 1 and 2)
      Fig 9: Identifying Relay Test Terminals
      G04333756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the fuel pump relay.

    NG: REPLACE FUEL PUMP RELAY ASSY 

    OK: GO TO NEXT STEP. 

  11. INSPECT FUEL PUMP RESISTOR (RESISTANCE) 
    1. Inspect the fuel pump resistor resistance.
      1. Measure the resistance between the terminals.

        Resistance: 0.70 to 0.76 at 20°C (68°F) 

        Fig 10: Inspecting Fuel Pump Resistor - Resistance
        G04337139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUEL PUMP RESISTOR 

    OK: GO TO NEXT STEP. 

  12. CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - FUEL PUMP RESISTOR, FUEL PUMP RESISTOR - F) 
    1. Check the harness and connector between the fuel pump relay and fuel pump resistor.
      1. Remove the fuel pump relay from the engine room R/B.
      2. Disconnect the F8 fuel pump resistor connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        Engine room R/B (Fuel pump relay terminal 5) - Fuel pump resistor (F8-1) Below 1
        Fig 11: Identifying Fuel Pump Relay Location
        G04337140Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        Engine room R/B (Fuel pump relay terminal 5) or Fuel pump resistor (F8-1) - Body ground 10 k or higher
      4. Reinstall the fuel pump relay.
      5. Reconnect the fuel pump resistor connector.
    2. Check the harness and connector between the fuel pump resistor and fuel pump.
      Fig 12: Identifying Fuel Pump Resistor Connector Terminals
      G04337141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the F8 fuel pump resistor connector.
      2. Disconnect the F14 fuel pump connector.
      3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Fuel pump resistor (F8-2) - Fuel pump (F14-4) Below 1

      Standard (Check for short): 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Connection Specified Condition
      Fuel pump resistor (F8-2) or Fuel pump (F14-4) - Body ground 10 k or higher
    3. Reconnect the fuel pump resistor connector.
    4. Reconnect the fuel pump connector.
      Fig 13: Identifying F14 Fuel Pump Connector Terminals
      G04337142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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