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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.

    1. OK: Go to step   9 
    2. 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. 

    1. OK: Go to step   5 
    2. OK: 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: 

      Fig 1: Circuit Opening Relay Terminals Continuity Table
      G01421488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Checking Continuity Between Opening Relay Terminals
      G01421489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the circuit opening relay.
    1. NG: REPLACE CIRCUIT OPENING RELAY 
    2. 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 E7 and E9 ECM connectors.

    Standard: 

    Fig 3: ECM Connector Terminals Specified Condition Table
    G01421490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying ECM Connector Terminals
    G01421491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE ECM (See  ECM (2UZ-FE)  )  .
    2. OK: GO TO NEXT STEP. 

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

  5. CHECK FOR ECM POWER SOURCE CIRCUIT ( ECM POWER SOURCE CIRCUIT   ) 
    1. NG: REPAIR OR REPLACE 
    2. OK: GO TO NEXT STEP. 
  6. INSPECT FUEL PUMP RELAY ASSYM 
    1. Remove the fuel pump relay from the engine room R/B.
    2. Check for continuity in the fuel pump relay.

      Standard: 

      Fig 5: Fuel Pump Relay Terminals Continuity Table
      G01421492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 6: Checking Continuity Between Fuel Pump Relay Terminals
      G01421493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the fuel pump relay.
    1. NG: REPLACE FUEL PUMP RELAY ASSY 
    2. 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: 

        Fig 7: Fuel Pump Connector Terminals Specified Condition Chart
        G01421494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Fig 8: Identifying Fuel Pump Connector Terminals (Component Side)
        G01421495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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.
    1. NG: REPLACE FUEL PUMP 
    2. OK: GO TO NEXT STEP. 
  8. CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP RELAY, FUEL PUMP - BODY GROUND) 
    Fig 9: Identifying Fuel Pump Connector Terminals (Wire Harness Side)
    G01421496Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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): 

      Fig 10: Fuel Pump Connector Terminals Specified Condition Chart (Check For Open)
      G01421497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      Fig 11: Fuel Pump Connector Terminals Specified Condition Chart (Check For Short)
      G01421498Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
        Fig 12: Identifying Fuel Pump Relay
        G01421499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      Fig 13: Fuel Pump Connector Terminals Specified Condition Chart (Check For Open)
      G01421500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
      2. OK: GO TO NEXT STEP. 
    3. 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): 

      Fig 14: Circuit Opening Relay Connector Terminals Specified Condition Chart (Check For Open)
      G01421501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 15: Identifying Circuit Opening Relay
      G01421502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      Fig 16: Circuit Opening Relay Connector Terminals Specified Condition Chart (Check For Short)
      G01421503Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reinstall the circuit opening relay.
    5. Reinstall the fuel pump relay.
      Fig 17: Identifying Fuel Pump Relay
      G01421504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 

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

  9. 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: 

      Fig 18: Fuel Pump Relay Connector Terminals Continuity Chart
      G01421505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 19: Checking Continuity Between Fuel Pump Relay Connector Terminals
      G01421506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the fuel pump relay.
    1. NG: REPLACE FUEL PUMP RELAY ASSY 
    2. OK: GO TO NEXT STEP. 
  10. INSPECT FUEL PUMP RESISTER (RESISTANCE) 
    Fig 20: Measuring Resistance Between Fuel Pump Terminals
    G01421507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Inspect the fuel pump resistor resistance
      1. Measure the resistance between the terminals.
        1. Resistance: 0.70 to 0.76 Ω at 20°C (68°F) 
    1. NG: REPLACE FUEL PUMP RESISTER 
    2. OK: GO TO NEXT STEP. 
  11. CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - FUEL PUMP RESISTOR, FUEL PUMP RESISTOR - FUEL PUMP) 
    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 F6 fuel pump resistor connector.
      3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      Fig 21: Fuel Pump Relay Terminals Specified Condition Chart (Check For Open)
      G01421508Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 22: Identifying Fuel Pump Relay
      G01421509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      Fig 23: Fuel Pump Relay Terminals Specified Condition Chart (Check For Short)
      G01421510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 24: Identifying Fuel Pump Resistor Connectors (Wire Harness Side)
      G01421511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reinstall the fuel pump relay.
    3. Reconnect the fuel pump resistor connector.
  12. Check the harness and connector between the fuel pump resistor and fuel pump.
    1. Disconnect the F6 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): 

      Fig 25: Fuel Pump Resistor Connectors Terminals Specified Condition Chart (Check For Open)
      G01421512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      Fig 26: Fuel Pump Resistor Connectors Terminals Specified Condition Chart (Check For Short)
      G01421513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 27: Identifying Fuel Pump Connectors (Wire Harness Side)
      G01421514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the fuel pump resistor connector.
    5. Reconnect the fuel pump connector.
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE ( PROBLEM SYMPTOMS TABLE   ) 
    2. NG: GO TO NEXT STEP. 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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