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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 617 (ENGINE CONTROL SYSTEM (SFI) (1MZ-FE-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. 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 with 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 (C/OPN) 
    1. Remove the C/OPN relay from the engine room J/B.
    2. Check the resistance of the C/OPN relay.

      Standard: 

      C/OPN RELAY RESISTANCE SPECIFICATION

      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: Identifying C/OPN Relay Connector Terminals
      G02900721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: Go to next step. 
  3. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Standard: 

      ECM CONNECTORS VOLTAGE SPECIFICATION

      Tester Connection Specified Condition
      E6-10 (FC) - E8-1 (E1) 9 to 14 V
      Fig 2: Identifying ECM Connector Terminals
      G02900722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
    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 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: 

      ECM AND C/OPN RELAY CONNECTOR TERMINAL RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E6-10 (FC) - 2 of C/OPN relay Below 1 Ω
      E6-10 (FC) or 2 of C/OPN relay - Body ground 10 kΩ or higher
      Fig 3: Identifying FC And C/OPN Relay Connector Terminals
      G02900723Courtesy 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.
        • Check 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 I15 ignition switch connector.
      4. Check the resistance of the wire harness side connectors.

      Standard: 

      C/OPN RELAY CONNECTOR RESISTANCE SPECIFICATION

      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
      Fig 4: Identifying IG2 Fuse And C/OPN Relay Connector Terminals
      G02900724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
  5. INSPECT FUEL PUMP 
    1. Check the fuel pump resistance.
      1. Measure the resistance between terminals 4 and 5.

        Resistance: 0.2 to 3.0 Ω at 20°C (68°F) 

    2. Check the fuel pump operation
      1. Apply battery voltage to both the terminals. Check that the pump operates.
        Fig 5: Identifying Fuel Pump Connector Terminals
        G02900725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    1. NG: REPLACE FUEL PUMP (See  FUEL PUMP ASSY (1MZ-FE/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. Check the resistance of the wire harness side connectors.

      Standard: 

      C/OPN RELAY CONNECTOR TERMINAL RESISTANCE SPECIFICATION

      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: Identifying C/OPN Relay Connector Terminals
      G02900726Courtesy 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 between the wire harness side connectors and body ground.

      Standard: 

      FUEL PUMP AND BODY GROUND RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 Ω
      Fig 7: Identifying F8 Fuel Pump Connector
      G02900727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. NG: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 

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. When connecting between terminal FC of the E6 ECM connector and the body ground, check the relay operation.

      Standard: 

      Noise can be heard from the C/OPN relay. 

      Fig 8: Identifying FC Of E6 ECM Connector
      G02900728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   6 
    2. 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.

      Standard: 

      C/OPN RELAY CONNECTOR TERMINAL RESISTANCE SPECIFICATION

      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: Checking Resistance Of C/OPN Relay
      G02900729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: Go to next step. 
  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Standard: 

      ECM CONNECTORS VOLTAGE SPECIFICATION

      Tester Connection Specified Condition
      E6-10 (FC) - E8-1 (E1) 9 to 14 V
      Fig 10: Identifying ECM Connector
      G02900730Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
    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 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: 

      FUEL PUMP AND C/OPN RELAY TERMINAL RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E6-10 (FC) - J/B C/OPN relay terminal 2 Below 1 Ω
      E6-10 (FC) or J/B C/OPN relay terminal 2 - Body ground 10 kΩ or higher
      Fig 11: Identifying C/Opn Relay-ECM Connector Terminals
      G02900731Courtesy 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.
        • Check 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 I15 ignition switch connector.
      4. Check the resistance of the wire harness side connectors.

      Standard: 

      C/OPN RELAY TERMINAL RESISTANCE SPECIFICATION

      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
      Fig 12: Identifying C/OPN Relay - Ignition Connector Terminals
      G02900732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
  6. INSPECT FUEL PUMP 
    1. Check fuel pump resistance.
      1. Measure the resistance between terminals 4 and 5.

        Resistance: 0.2 to 3.0 Ω at 20°C (68°F) 

    2. Check fuel pump operation
      1. Apply battery voltage to both the terminals. Check that the pump operates.
        Fig 13: Identifying F8 Fuel Pump Connector
        G02900733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    1. NG: REPLACE FUEL PUMP (See  FUEL PUMP ASSY (1MZ-FE/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. Check the resistance of the wire harness side connectors.

      Standard: 

      C/OPN RELAY AND FUEL PUMP TERMINAL RESISTANCE SPECIFICATION

      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: Identifying C/OPN Relay - Fuel Pump Connector Terminals
      G02900734Courtesy 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.

      Standard: 

      FUEL PUMP AND BODY GROUND RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      F8-5 (Fuel pump) - Body ground Below 1 Ω
      Fig 15: Disconnecting F8 Fuel Pump Connector
      G02900735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
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.