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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 686 (ENGINE CONTROL SYSTEM (SFI) (3MZ-FE) - DIAGNOSTICS)ECM POWER SOURCE 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.
  1. CHECK ECM (+B VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

    Standard: 

    SPECIFIED CONDITION

    Tester Connection Specified Condition
    E4-1 (+B) - E6-1 (E1) 9 to 14 V
    Fig 1: Checking ECM (+B Voltage)
    G03036028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. NG : Go To Next Step. 
  2. CHECK WIRE HARNESS (ECM - BODY GROUND) 
    1. Disconnect the E6 ECM connector.
    2. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E6-1 (E1) - Body ground Below 1 Ω
      Fig 2: Checking Wire Harness (ECM - Body Ground)
      G03036029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go To Next Step. 
  3. CHECK ECM (IGSW VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-9 (IGSW) - E6-1 (E1) 9 to 14 V
      Fig 3: Checking ECM (IGSW Voltage)
      G03036030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Go to step   6 
    2. NG : Go To Next Step. 
  4. INSPECT FUSE (IG2) 
    1. Remove the IG2 fuse from the engine room J/B.
    2. Measure the resistance of the IG2 fuse.

      Standard: Below 1 Ω 

      Fig 4: Removing IG2 Fuse From Engine Room J/B
      G03036031Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE FUSE 
    2. OK : Go To Next Step. 
  5. INSPECT IGNITION OR STARTER SWITCH ASSY 
    1. Measure the resistance of the switch terminals shown in the chart below.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      6 (IG2) - 7 (AM2) LOCK 10 kΩ or higher
      6 (IG2) - 7 (AM2) ON Below 1 Ω
      Fig 5: Inspecting Ignition Or Starter Switch Assy Terminal
      G03036032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE IGNITION OR STARTER SWITCH ASSY 
    2. OK : CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 
  6. CHECK ECM (MREL VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-8 (MREL) - E6-1 (E1) 9 to 14 V
      Fig 6: Checking ECM (MREL Voltage)
      G03036033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE ECM (See  REPLACEMENT  ) 
    2. OK : Go To Next Step. 
  7. INSPECT FUSE (EFI) 
    1. Remove the EFI fuse from the engine room J/B.
    2. Measure the resistance of the EFI fuse.

      Standard: Below 1 Ω 

    1. NG : REPLACE FUSE 
    2. OK : Go To Next Step. 
  8. INSPECT RELAY (Marking: EFI) 
    1. Remove the EFI relay from the engine room J/B.
    2. Measure the resistance of the EFI 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 7: Removing EFI Relay From Engine Room J/B
      G03036034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE RELAY 
    2. OK : Go To Next Step. 
  9. CHECK WIRE HARNESS (EFI RELAY - ECM, EFI RELAY - BODY GROUND) 
    1. Check the wire harness between the EFI relay and ECM.
      1. Remove the EFI relay from the engine room J/B.
      2. Disconnect the E4 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      J/B EFI relay terminal 1 - E4-8 (MREL) Below 1 Ω
      J/B EFI relay terminal 1 or E4-8 (MREL) - Body ground 10 kΩ or higher
    2. Check the wire harness between the EFI relay and body ground.
      1. Remove the EFI relay from the engine room J/B.
      2. Measure the resistance between the wire harness side connector.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      J/B EFI relay terminal 2 - Body ground Below 1 Ω
      Fig 8: Measuring Resistance Of Wire Harness Side Connectors
      G03036035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. NG : CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL) 
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.