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Home >> Toyota >> 2007 >> Camry Hybrid >> Repair and Diagnosis >> Engine Performance >> Engine Control System (Hybrid) >> SFI System >> Fuel Pump Control Circuit >> Inspection Procedure
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Inspection Procedure

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE C/OPN RELAY) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the power switch on (IG) and turn the tester on.
    3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
    4. Check whether the fuel pump operation sound occurs when performing the Active Test on the tester.

      OK: 

      Fuel pump operating sound occurs. 

    NG:  Go to step  2

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

  2. CHECK ECM POWER SOURCE CIRCUIT 

    NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

    OK: Go to next step 

  3. INSPECT ENGINE ROOM J/B (C/OPN RELAY) 
    1. Remove the engine room J/B from the engine room R/B.
    2. Inspect the C/OPN relay.
      1. Measure the C/OPN relay resistance.

        Standard resistance 

        STANDARD RESISTANCE

        Tester Connection Specified Condition
        1E-7 - 1E-13 10 kΩ or higher
        Below 1 Ω (Apply battery voltage between terminals 1D-12 and 1E-8)
    3. Reinstall the engine room J/B.

    NG: REPLACE ENGINE ROOM J/B 

    Fig 1: Identifying Engine Room J/B From Engine Room R/B
    G04973333Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Disconnect the A61 and C64 hybrid vehicle control ECU connectors.
      Fig 2: Identifying A61 & C64 Hybrid Vehicle Control ECU Connectors
      G05007960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the terminals of the A61 and C64 ECM connectors.

      Standard voltage 

      STANDARD VOLTAGE

      Tester Connection Specified Condition
      A61-94 (FC) - C64-14 (E1) 9 to 14 V
    3. Reconnect the hybrid vehicle control ECU connectors.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY) 

    OK: Go to next step 

  5. INSPECT FUEL PUMP 

    NG: REPLACE FUEL PUMP 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP - BODY GROUND) 
    1. Check the harness and the connectors between the engine room J/B and the fuel pump.
      1. Remove the engine room J/B from the engine room R/B.
      2. Disconnect the 1E engine room J/B connector.
      3. Disconnect the N10 fuel pump connector.
      4. Measure the resistance according to the value(s) in STANDARD RESISTANCE TABLE .

        Standard resistance (Check for open) 

        STANDARD RESISTANCE TABLE

        Tester Connection Specified Condition
        1E-13 - N10-4 (Fuel pump) Below 1 Ω

        Standard resistance (Check for short) 

        STANDARD RESISTANCE

        Tester Connection Specified Condition
        1E-13 or N10-4 (Fuel pump) - Body ground 10 kΩ or higher
    2. Check the harness and the connectors between the fuel pump and body ground.
      1. Disconnect the N10 fuel pump connector.
        Fig 3: Identifying N10 Fuel Pump Connector
        G04973335Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the resistance.

        Standard resistance (Check for open) 

        STANDARD RESISTANCE

        Tester Connection Specified Condition
        N10-5 (Fuel pump) - Body ground Below 1 Ω
    3. Reconnect the engine room J/B connector.
    4. Reconnect the fuel pump connector.
    5. Reinstall the engine room J/B.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE HYBRID VEHICLE CONTROL ECU 

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