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Home >> Toyota >> 2006 >> Camry Solara SLE, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (3MZ-FE) >> SFI System >> Fuel Pump Control Circuit >> Inspection Procedure
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Inspection Procedure

When using intelligent tester: 

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE C/OPN RELAY) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch ON, push the intelligent tester or OBD II scan tool 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 using the intelligent tester.

      Standard: Operating noise can be heard from the relay. 

    1. OK: Go to step   5 
    2. NG: GO TO NEXT STEP 
  2. INSPECT RELAY (Marking: C/OPN) 
    1. Remove the C/OPN relay from the engine room J/B.
    2. Measure the resistance of the C/OPN relay.

      Resistance: 

      RELAY (MARKING: C/OPN)

      Tester Connection Specified Condition
      3 - 5 10 k ohms or higher
      3 - 5 Below 1 ohms(when battery voltage is applied to terminals 1 and 2)
      Fig 1: Inspecting Relay (C/OPN)
      G02588159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: GO TO NEXT STEP 
  3. CHECK ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Voltage: 

      ECM (FC VOLTAGE)

      Tester Connection Specified Condition
      E4-10 (FC) - E6-1 (E1) 9 to 14 V
    Fig 2: Checking ECM (FC Voltage)
    G02588160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE ECM  
    2. NG: GO TO NEXT STEP 
  4. CHECK WIRE HARNESS (ECM - C/OPN RELAY, C/OPN RELAY - IGNITION) 
    1. Check the wire harness between the ECM and C/OPN relay.
      1. Disconnect the E4 ECM connector.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

      Resistance: 

      ECM AND C/OPN RELAY

      Tester Connection Specified Condition
      E4-10 (FC) - 2 of C/OPN relay Below 1 ohms
      E4-10 (FC) or 2 of C/OPN relay - Body ground 10 k ohms or higher
      Fig 3: Checking Wire Harness Between ECM And C/OPN Relay
      G02588161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the C/OPN relay and ignition switch.
      1. Check the IG2 fuse.
        • Remove the IG2 fuse from the engine room J/B.
        • Measure the resistance of the IG2 fuse.

        Resistance: Below 1 ohms 

        • Reinstall the IG2 fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the I15 ignition switch connector.
      4. Measure the resistance of the wire harness side connectors.

      Resistance: 

      C/OPN RELAY AND IGNITION SWITCH

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 1 - I15-6 Below 1 ohms
      J/B C/OPN relay terminal 1 or I15-6 - Body ground 10 k ohms or higher
      Fig 4: Checking Wire Harness Between C/OPN Relay And Ignition Switch
      G02588162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM 
  5. INSPECT FUEL PUMP 
    1. Check the resistance of the fuel pump.
      1. Measure the resistance between terminals 4 and 5.

      Resistance: 

      FUEL PUMP

      Tester Connection Condition Specified Condition
      4 - 5 20°C (68°F) 0.2 to 0.3
      Fig 5: Inspecting Fuel Pump
      G02588163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the fuel pump operation
      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 the 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  
    2. 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. Measure the resistance of the wire harness side connectors.

      Resistance: 

      C/OPN RELAY AND FUEL PUMP

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 3 - F8-4 Below 1 ohms
      J/B C/OPN relay terminal 3 or F8-4 - Body ground 10 k ohms or higher
      Fig 6: Checking Wire Harness Between C/OPN Relay And Fuel Pump
      G02588164Courtesy 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. Measure the resistance between the wire harness side connectors and body ground.

      Resistance: 

      FUEL PUMP AND BODY GROUND

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 ohms
      Fig 7: Checking Wire Harness Between Fuel Pump And Body Ground
      G02588165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM 

When using OBD II Scan Tool: 

  1. CHECK FUEL PUMP OPERATION 
    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.

    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  
    2. NG: GO TO NEXT STEP 
  2. CHECK RELAY OPERATION (C/OPN) 
    1. Connect terminal FC of the E4 ECM connector and the body ground, and check the relay operation.

      Standard: 

      Noise can be heard from the C/OPN relay. 

      Fig 8: Checking Relay Operation (C/OPN)
      G02588166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   6 
    2. NG: GO TO NEXT STEP 
  3. INSPECT RELAY (Marking: C/OPN) 
    1. Remove the C/OPN relay from the engine room J/B.
    2. Measure the resistance of the C/OPN relay.

      Resistance: 

      RELAY (MARKING: C/OPN)

      Tester Connection Specified Condition
      3 - 5 10 k ohms or higher
      3 - 5 Below 1 ohms(when battery voltage is applied to terminals 1 and 2)
    Fig 9: Inspecting Relay (C/OPN)
    G02588167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: GO TO NEXT STEP 
  4. CHECK ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Voltage: 

      ECM (FC VOLTAGE)

      Tester Connection Specified Condition
      E4-10 (FC) - E6-1 (E1) 9 to 14 V
    Fig 10: Checking ECM (FC Voltage)
    G02588168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE ECM 
    2. OK: GO TO NEXT STEP 
  5. CHECK WIRE HARNESS (ECM - C/OPN RELAY, C/OPN RELAY - IGNITION) 
    1. Check the wire harness between the fuel pump and C/OPN relay.
      1. Disconnect the E4 ECM connector.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

      Resistance: 

      FUEL PUMP AND C/OPN RELAY

      Tester Connection Specified Condition
      E4-10 (FC) - J/B C/OPN relay terminal 2 Below 1 ohms
      E4-10 (FC) or J/B C/OPN relay terminal 2 - Body ground 10 k ohms or higher
      Fig 11: Checking Wire Harness Between Fuel Pump And C/OPN Relay
      G02588169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the C/OPN relay and ignition switch.
      1. Check the IG2 fuse.
        • Remove the IG2 fuse from the engine room J/B.
        • Measure the resistance of the IG2 fuse.

        Resistance: Below 1 

        • Reinstall the IG2 fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the I15 ignition switch connector.
      4. Measure the resistance of the wire harness side connectors.

      Resistance: 

      C/OPN RELAY AND IGNITION SWITCH

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 1 - I15-6 Below 1
      J/B C/OPN relay terminal 1 or I15-6 - Body ground 10 k ohms or higher
      Fig 12: Checking Wire Harness Between C/OPN Relay And Ignition Switch
      G02588170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM 
  6. INSPECT FUEL PUMP 
    1. Measure the resistance of the fuel pump.
      1. Measure the resistance between terminals 4 and 5.

      Resistance: 

      FUEL PUMP

      Tester Connection Condition Specified Condition
      4 - 5 20°C (68°F) 0.2 to 0.3
      Fig 13: Inspecting Fuel Pump
      G02588171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 the 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 
    2. 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.
      1. Remove the C/OPN relay from the engine room J/B.
      2. Disconnect the F8 fuel pump connector.
      3. Measure the resistance of the wire harness side connectors.

      Resistance: 

      C/OPN RELAY AND FUEL PUMP

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 3 - F8-4 Below 1 ohms
      J/B C/OPN relay terminal 3 or F8-4 - Body ground 10 k ohms or higher
      Fig 14: Checking Wire Harness Between C/OPN Relay And Fuel Pump
      G02588172Courtesy 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. Measure the resistance of the wire harness side connector.

      Resistance: 

      FUEL PUMP AND BODY GROUND

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 ohms
      Fig 15: Checking Wire Harness Between Fuel Pump And Body Ground
      G02588173Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM 
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