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Home >> Toyota >> 2006 >> Camry Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) (2AZ-FE) - Diagnostics >> Fuel Pump Control Circuit >> Inspection Procedure
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Inspection Procedure

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. 

    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.
      3. Fig 1: Identifying Relay Test Terminals
      G04106826Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    C/OPN RELAY - RESISTANCE TABLE

    Tester Connection Specified Condition
    3 - 5 10 kΩ or higher
    3 - 5 Below 1 Ω
    (when battery voltage is applied to terminals 1 and 2)

    NG: REPLACE RELAY 

    OK: Go to next step 

  3. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Check the voltage of the ECM connectors.
      3. Fig 2: Identifying ECM Connector Terminals
      G04389327Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    ECM CONNECTORS - VOLTAGE TABLE

    Tester Connection Specified Condition
    E6-25 (FC) - E10-3 (E1) 9 to 14 V

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

    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.
        4. Fig 3: Identifying E6 ECM Connector Terminal And C/OPN Relay
        G04389328Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      ECM - C/OPN RELAY - RESISTANCE TABLE

      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 10 kΩ or higher
    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 I15 ignition switch connector.
    4. Check the resistance of the wire harness side connectors.
      5. Fig 4: Identifying IGN Fuse And Ignition Switch Connector Terminals
      G04389329Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    C/OPN RELAY - IGNITION SWITCH - RESISTANCE TABLE

    Tester Connection Specified Condition
    J/B C/OPN relay terminal 1 - I15-6 Below 1 Ω
    J/B C/OPN relay terminal 1 or I15-6 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  5. INSPECT FUEL PUMP 
    1. Check the resistance of the fuel pump terminals.
      Fig 5: Identifying Fuel Pump Connector Terminals
      G04389330Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      FUEL PUMP - RESISTANCE TABLE

      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.
    • 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.

    NG: REPLACE FUEL PUMP (See step 13 on REPLACEMENT  ) 

    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.
        4. Fig 6: Identifying Fuel Pump Connector Terminals And C/OPN Relay
        G04389331Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      C/OPN RELAY - FUEL PUMP - RESISTANCE TABLE

      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 10 kΩ or higher
    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.
        3. Fig 7: Identifying Fuel Pump Connector Terminals
        G04389332Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    FUEL PUMP - BODY GROUND - RESISTANCE TABLE

    Tester Connection Specified Condition
    F8-5 - Body ground Below 1 Ω

    OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    NG: REPLACE ECM (See  ECM (2AZ-FE)  ) 

OBD II scan tool (excluding hand-held tester): 

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

    HINT:

    The pipe has fuel pressure if the sound of flowing fuel can be heard.

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

    NG: Go to next step 

  2. CHECK RELAY OPERATION (C/OPN RELAY) 
    1. When connecting between terminal FC of the E6 ECM connector and body ground, check relay operation.

    Standard: 

    Noise can be heard from the C/OPN relay. 

    Fig 8: Identifying ECM Connector Terminals
    G04389333Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    OK: Go to step   6 

    NG: Go to next step 

  3. 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.
      3. Fig 9: Identifying Relay Test Terminals
      G04106826Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    C/OPN RELAY - RESISTANCE TABLE

    Tester Connection Specified Condition
    3 - 5 10 kΩ or higher
    3 - 5 Below 1 Ω
    (when battery voltage is applied to terminals 1 and 2)

    NG: REPLACE RELAY 

    OK: Go to next step 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Check the voltage of the E10 and E6 ECM connectors.
      3. Fig 10: Identifying ECM Connector Terminals
      G04389335Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    ECM CONNECTORS - VOLTAGE TABLE

    Tester Connection Specified Condition
    E6-25 (FC) - E10-3 (E1) 9 to 14 V

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

    NG: Go to next step 

  5. 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.
        4. Fig 11: Identifying E6 ECM Connector Terminal And C/OPN Relay
        G04389336Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      ECM - C/OPN RELAY - RESISTANCE TABLE

      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 10 kΩ or higher
    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 I15 ignition switch connector.
      4. Check the resistance of the wire harness side connectors.
        5. Fig 12: Identifying C/OPN Relay And Ignition Switch Connector Terminal
        G04389337Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      C/OPN RELAY - IGNITION SWITCH - RESISTANCE TABLE

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 1 - I15-6 Below 1 Ω
      J/B C/OPN relay terminal 1 or I15-6 - Body ground 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

  6. INSPECT FUEL PUMP 
    1. Check the resistance of the fuel pump terminals.
      Fig 13: Identifying Fuel Pump Connector Terminals
      G04389338Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      FUEL PUMP - RESISTANCE TABLE

      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.
      • Keep fuel pump as far away from the battery as possible.
      • Always turns ON and OFF the voltage on the battery side, not the fuel pump side.

    NG: REPLACE FUEL PUMP (See step 13 on REPLACEMENT  ) 

    OK: Go to next step 

  7. 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 connector.
      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.
        4. Fig 14: Identifying C/OPN Relay And Fuel Pump Connector Terminals
        G04389339Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard: 

      C/OPN RELAY - FUEL PUMP - RESISTANCE TABLE

      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 10 kΩ or higher
    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.
        3. Fig 15: Identifying Fuel Pump Connector Terminals
        G04389340Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    Standard: 

    FUEL PUMP - BODY GROUND - RESISTANCE TABLE

    Tester Connection Specified Condition
    F8-5 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

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