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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 686 (ENGINE CONTROL SYSTEM (SFI) (3MZ-FE) - DIAGNOSTICS)FUEL PUMP CONTROL CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

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 the ignition switch ON and push the hand-held 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 using the hand-held 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.

      Standard: 

      SPECIFIED CONDITION

      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)
      Fig 1: Removing C/OPN Relay From Engine Room J/B
      G03036099Courtesy 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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-10 (FC) - E6-1 (E1) 9 to 14 V
      Fig 2: Checking ECM (FC Voltage)
      G03036100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : REPLACE ECM (See  REPLACEMENT  ) 
    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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-10 (FC) - 2 of C/OPN relay Below 1 Ω
      E4-10 (FC) or 2 of C/OPN relay - Body ground 10 kΩ or higher
      Fig 3: Checking Wire Harness Between ECM And C/OPN Relay
      G03036101Courtesy 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.

          Standard: Below 1 Ω 

        • Reinstall the IG2 fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the 115 ignition switch connector.
      4. Measure the resistance of the wire harness side connectors.

        Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 1 - |15-6 Below 1 Ω
      J/B C/OPN relay terminal 1 or |15-6 - Body ground 10 kΩ or higher
      Fig 4: Checking Wire Harness Between C/OPN Relay And Ignition Switch
      G03036102Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
  5. INSPECT FUEL PUMP 
    1. Check the resistance of the fuel pump.
      1. Measure the resistance between terminals 4 and 5.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      4-5 20°C (68°F) 0.2 to 0.3 Ω
    2. Check the fuel pump operation
      1. Apply battery voltage to both the terminals. Check that the pump operates.
      Fig 5: Inspecting Fuel Pump Connector Terminal
      G03036103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 (See  FUEL (3MZ-FE)  ) 
    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.

      Standard: 

      SPECIFIED CONDITION

      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
      Fig 6: Checking Wire Harness Between C/OPN Relay And Fuel Pump
      G03036104Courtesy 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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 Ω
      Fig 7: Checking Wire Harness Between Fuel Pump And Body Ground
      G03036105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 

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.

    1. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  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)
      G03036106Courtesy 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.

      Standard: 

      SPECIFIED CONDITION

      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)
      Fig 9: Removing C/OPN Relay From Engine Room J/B
      G03036107Courtesy 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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-10 (FC) - E6-1 (E1) 9 to 14 V
      Fig 10: Checking ECM (FC Voltage)
      G03036108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : REPLACE ECM (See  REPLACEMENT  ) 
    2. NG : 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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-10 (FC) - J/B C/OPN relay terminal 2 Below 1 Ω
      E4-10 (FC) or J/B C/OPN relay terminal 2 - Body ground 10 kΩ or higher
      Fig 11: Checking Wire Harness Between Fuel Pump And C/OPN Relay
      G03036109Courtesy 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.

          Standard: Below 1 Ω 

        • Reinstall the IG2 fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the 115 ignition switch connector.
      4. Measure the resistance of the wire harness side connectors.

        Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      J/B C/OPN relay terminal 1 - |15-6 Below 1 Ω
      J/B C/OPN relay terminal 1 or |15-6 - Body ground 10 kΩ or higher
      Fig 12: Checking Wire Harness Between C/OPN Relay And Ignition Switch
      G03036110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
  6. INSPECT FUEL PUMP 
    1. Check fuel pump resistance.
      1. Measure the resistance between terminals 4 and 5.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      4-5 20°C (68°F) 0.2 to 0.3 Ω
    2. Check fuel pump operation
      1. Apply battery voltage to both the terminals. Check that the pump operates.
      Fig 13: Inspecting Fuel Pump Connected Terminal
      G03036111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 (See  FUEL (3MZ-FE)  ) 
    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.

      Standard: 

      SPECIFIED CONDITION

      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
      Fig 14: Checking Wire Harness Between C/OPN Relay And Fuel Pump
      G03036112Courtesy 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.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 Ω
      Fig 15: Checking Wire Harness Between Fuel Pump And Body Ground
      G03036113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.