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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 686 (ENGINE CONTROL SYSTEM (SFI) (3MZ-FE) - DIAGNOSTICS)AIR INTAKE 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. READ VALUE OF HAND-HELD TESTER (VSV FOR IAC VALVE NO. 3) 
    1. Turn the ignition switch ON and push the hand-held tester main switch ON.
    2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV.
    3. Check the operation of the VSV when the VSV is operated by the hand-held tester.

      Standard: 

      SPECIFIED CONDITION

      Tester Operation Specified Condition
      VSV is ON Air from port E flows out through port F
      VSV is OFF Air from port E flows out through the air filter
      Fig 1: Checking Operation Of VSV When VSV Is Operated
      G03036021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Go to step   4 
    2. NG : Go To Next Step. 
  2. CHECK VSV (See  INSPECTION  ) 
    1. NG : REPLACE INTAKE AIR CONTROL VALVE ASSY NO. 3 
    2. OK : Go To Next Step. 
  3. CHECK WIRE HARNESS (VSV FOR IAC VALVE NO. 3 - ECM, VSV FOR IAC VALVE NO. 3 - EFI RELAY) 
    1. Check the wire harness between the VSV and ECM.
      1. Disconnect the V4 VSV connector for AICV.
      2. Disconnect the E8 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V4-1 - E8-33 (AICV) Below 1 Ω
      V4-1 or E8-33 (AICV) - Body ground 10 kΩ or higher
      Fig 2: Checking Wire Harness Between VSV And ECM
      G03036022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV and the EFI relay.
      1. Disconnect the V4 VSV connector for AICV.
      2. Remove the EFI relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V4-2 (VSV for AICV) - J/B EFI relay terminal 3 Below 1 Ω
      Fig 3: Checking Wire Harness Between VSV And EFI Relay
      G03036023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go To Next Step. 
  4. INSPECT VACUUM TANK (See  INSPECTION  ) 
    1. NG : REPAIR OR REPLACE 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 

OBD II scan tool (excluding Hand-held tester): 

  1. CHECK VSV FOR AICV (See  INSPECTION  ) 
    1. NG : REPLACE INTAKE AIR CONTROL VALVE ASSY NO. 3 
    2. OK : Go To Next Step. 
  2. CHECK ECM (AICV VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.

      Voltage: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      E8-33 (AICV) - E6-1 (E1) 9 to 14 V
      Fig 4: Checking ECM (AICV Voltage)
      G03036024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go To Next Step. 
  3. INSPECT VACUUM TANK (See  INSPECTION  ) 
    1. NG : REPAIR OR REPLACE 
    2. OK : Go To Next Step. 
  4. CHECK WIRE HARNESS (VSV FOR IAC VALVE NO. 3 - ECM, VSV FOR IAC VALVE NO. 3 - EFI RELAY) 
    1. Check the wire harness between the VSV and ECM.
      1. Disconnect the V4 VSV connector.
      2. Disconnect the E8 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V4-1 - E8-33 (AICV) Below 1 Ω
      V4-1 or E8-33 (AICV) - Body ground 10 kΩ or higher
      Fig 5: Checking Wire Harness Between VSV And ECM
      G03036025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV and EFI relay.
      1. Disconnect the V4 VSV connector.
      2. Remove the EFI relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V4-2 (VSV for AICV) - J/B EFI relay terminal 3 Below 1 Ω
      Fig 6: Checking Wire Harness Between VSV And EFI Relay
      G03036026Courtesy 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.