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Home >> Toyota >> 2005 >> Camry Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) (2AZ-FE) - Diagnostics >> Fuel Pump Control Circuit >> Inspection Procedure >> Hand-held tester:

Hand-held tester:

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE C/OPN RELAY) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn ON the ignition switch, Push the hand-held tester or the OBD II scan tool tester main switch ON.
    3. Enter the following menus:DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
    4. Check the relay operation while operating it with the hand-held tester.

    Standard: Operating noise can be heard from the relay. 

    1. OK: Go to step   5 

    NG: Go to Next Step. 

  2. INSPECT RELAY (C/OPN) 
    1. Remove the C/OPN relay from the engine room J/B.
    2. Check the resistance of the C/OPN relay.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (1 OF 14)

    Tester Connection Specified Condition
    3-5 10KΩ or higher
    3-5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)
    1. NG: REPLACE RELAY 
    Fig 1: Removing C/OPN Relay From Engine Room J/B
    G02627981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

  3. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Check the voltage of the ECM connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (2 OF 14)

    Tester Connection Specified Condition
    E6-25 (FC) - E10-3 (E1) 9 to 14 V
    1. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    Fig 2: Identifying ECM Connector
    G02627982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step. 

  4. CHECK WIRE HARNESS (ECM - C/OPN RELAY, C/OPN RELAY - IGNITION SWITCH) 
    1. Check the wire harness between the ECM and C/OPN relay.
      1. Disconnect the E6 ECM connector.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (3 OF 14)

      Tester Connection Specified Condition
      E6-25 (FC) - J/B C/OPN relay terminal 2 Below 1 Ω
      E6-25 (FC) or J/B C/OPN relay terminal 2 - Body ground 10KΩ or higher
      Fig 3: Disconnecting E6 ECM Connector
      G02627983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the C/OPN relay and ignition switch.
      1. Check the IGN fuse.
        • Remove the IGN fuse from the engine room J/B.
        • Check the resistance of the IGN fuse.

          Standard: Below 1 Ω 

        • Reinstall the IGN fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the 115 ignition switch connector.
      4. Check the resistance of the wire harness side connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (4 OF 14)

    Tester Connection Specified Condition
    J/B C/OPN relay terminal 1 - 115-6 Below 1 Ω
    J/B C/OPN relay terminal 1 or 115-6 Body ground 10 KΩ or higher
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 

    Fig 4: Removing C/OPN Relay From Engine Room J/B
    G02627984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT FUEL PUMP 
    1. Check the resistance of the fuel pump terminals.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (5 OF 14)

      Tester Condition Condition Specified Condition
      4-5 20°C (68°F) 0.2 to 0.3 Ω
    2. Check operation of the fuel pump.
      1. Apply battery voltage to both the terminals. Check that the pump operates.
    NOTE:
    • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
      Fig 5: Identifying Fuel Pump Connector
      G02627985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Keep fuel pump as far away from the battery as possible.
    • Always turn ON and OFF the voltage on the battery side, not the fuel pump side.
    1. NG: REPLACE FUEL PUMP (See  FUEL PUMP ASSY (2AZ-FE) (FROM JULY, 2003)  ) 

    OK: Go to Next Step. 

  6. CHECK WIRE HARNESS (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    1. Check the wire harness between the C/OPN relay and fuel pump.
      1. Remove the C/OPN relay from the engine room J/B.
      2. Disconnect the F8 fuel pump connector.
      3. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (6 OF 14)

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 3 - F8-4 Below 1 Ω
      J/B C/OPN relay terminal 3 or F8-4 - Body ground 10KΩ or higher
      Fig 6: Removing C/OPN Relay From Engine Room J/B
      G02627986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the fuel pump and body ground.
      1. Disconnect the F8 fuel pump connector.
      2. Check the resistance of the wire harness side connector and body ground.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (7 OF 14)

    Tester Connection Specified Condition
    F8-5 - Body ground Below 1 Ω
    1. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    Fig 7: Identifying Fuel Pump Connector
    G02627987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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