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Hand-held tester:

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE CIRCUIT OPENING RELAY) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the hand-held tester ON.
    4. Select the item: DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST/FUEL PUMP/SPD.
    5. Check the relay operation while operating it using the hand-held tester.

      Standard: Operating noise can be heard from the relay. 

    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 
    2. NG: GO TO NEXT STEP 
  2. INSPECT POWER SOURCE CIRCUIT (See  ECM POWER SOURCE CIRCUIT   ) 
    1. NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT COMPONENTS 
    2. OK: GO TO NEXT STEP 
  3. INSPECT INTEGRATION RELAY (C/OPN RELAY) 
    1. Remove the integration relay from the engine room R/B.
    2. Inspect the circuit opening relay.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

      Tester Connection Specified Condition
      (3G-5) - (3G-8) 10 kΩ or higher
      (3G-5) - (3G-8) Below 1 Ω (Apply battery voltage to terminals 3G-6 and 3G-7)
    3. Reinstall the integration relay.
      Fig 1: Inspecting Integration Relay (C/OPN Relay)
      G02619690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE INTEGRATION RELAY 
    2. OK: GO TO NEXT STEP 
  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the power switch ON (IG).
    2. Measure the voltage between the specified terminals of the E5 and E6 ECM connectors.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

      Tester Connection Specified Condition
      FC (E6-10) - E1 (E5-28) 9 to 14 V
      Fig 2: Identifying E5 And E6 ECM Connectors Terminals
      G02619691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step 5 
    2. NG: GO TO NEXT STEP 

      CHECK AND REPAIR HARNESS OR CONNECTOR 

  5. INSPECT FUEL PUMP 
    1. Disconnect the F14 fuel pump connector.
    2. Inspect the fuel pump resistance.
      1. Measure the resistance between terminals 3 and 7.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

      Tester Connection Specified Condition
      3 - 7 0.2 to 3.0 Ω at 20°C (68°F)
    3. Inspect the fuel pump operation
      1. Apply battery voltage to the fuel pump terminals. Check that the pump operates.
        Fig 3: Identifying F14 Fuel Pump Connector Terminals
        G02619692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        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. 
    4. Reconnect the fuel pump connector.
    1. NG: REPAIR OR REPLACE FUEL TANK ASSY 
    2. OK: GO TO NEXT STEP 
  6. CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    1. Check the harness and the connectors between the circuit opening relay and the fuel pump connector.
      1. Remove the integration relay from the engine room R/B.
      2. Disconnect the F14 fuel pump connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

        Tester Connection Specified Condition
        Circuit opening relay (3G-8) - Fuel pump (F14-3) Below 1Ω
        Fig 4: Identifying Circuit Opening Relay Location
        G02619693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

        Tester Connection Specified Condition
        Circuit opening relay (3G-8) or Fuel pump (F14-3) - Body ground 10 kΩ or higher
      4. Reinstall the integration relay.
      5. Reconnect the fuel pump connector.
    2. Check the harness and the connectors between the fuel pump connector and the body ground.
      1. Disconnect the F14 fuel pump connector.
      2. Check the resistance between the wire harness side connector and the body ground.
        Fig 5: Identifying F14 Fuel Pump Connector Terminals
        G02619694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        TESTER CONNECTION SPECIFIED CONDITION DESCRIPTION

        Tester Connection Specified Condition
        Fuel pump (F14-7) - Body ground Below 1 Ω
      3. Reconnect the fuel pump connector.
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      REPLACE ECM (See  ECM (1NZ-FXE)  ) 

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