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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 686 (ENGINE CONTROL SYSTEM (SFI) (3MZ-FE) - DIAGNOSTICS)ACTIVE CONTROL ENGINE MOUNTINSPECTION 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 VACUUM HOSES 
    1. Check if the vacuum hose cap is missing.
    2. If the hose is damaged, replace the vacuum hose assembly.
    3. Check the air and vacuum hoses for looseness, disconnection and blockage.
    Fig 1: Checking Air And Vacuum Hoses For Looseness, Disconnection And Blockage
    G03036012Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE VACUUM HOSES 
    2. OK : Go To Next Step. 
  2. CHECK VACUUM 
    1. Start the engine.
    2. Disconnect the vacuum hose from the vacuum tank.
    3. Check that the unconnected port located on the vacuum tank applies suction to your finger.
    4. Reconnect the vacuum hose.
    Fig 2: Disconnecting Vacuum Hose From Vacuum Tank
    G03036013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : CHECK AND REPLACE VACUUM SOURCE AND HOSES 
    2. OK : Go To Next Step. 
  3. CHECK ECM (ACM VOLTAGE) 
    1. Connect the oscilloscope between terminals ACM and E1 of the E6 ECM connector.
    2. Warm up engine to normal operating temperature.
    3. Turn the A/C switch on.
    4. Measure the voltage between terminals ACM and E1 of the E6 ECM connector.

      Result: 

      VOLTAGE SPECIFICATION

      Condition Voltage
      Shift position is D range, and engine speed is 850 RPM or less Pulse generation
      Shift position is D range, and engine speed is 950 RPM or more 9 to 14 V
      Shift position is P range 9 to 14 V
      Fig 3: Measuring Voltage Between Terminals ACM And E1 Of E6 ECM Connector
      G03036014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Go to step   6 
    2. NG : Go To Next Step. 
  4. INSPECT VSV FOR ACM (RESISTANCE) 
    1. Disconnect the V3 VSV connector.
    2. Measure the resistance between the terminals 1 and 2.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 19 to 20 °
      Fig 4: Measuring Resistance Between Terminals 1 And 2.
      G03036015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE VSV 
    2. OK : Go To Next Step. 
  5. CHECK WIRE HARNESS (VSV FOR ACM - ECM, VSV FOR ACM - EFI RELAY) 
    1. Check the wire harness between the VSV and ECM.
      1. Disconnect the V3 VSV connector for ACM.
      2. Disconnect the E6 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V3-2 - E6-6 (ACM) Below 1 Ω
      V3-2 or E6-6 (ACM) - Body ground 10 kΩ or higher
      Fig 5: Checking Wire Harness Between VSV And ECM
      G03036016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV and EFI relay.
      1. Disconnect the V3 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
      V3-1 (VSV for ACM) - J/B EFI relay terminal 3 Below 1 Ω
      Fig 6: Checking Wire Harness Between VSV And EFI Relay
      G03036017Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
  6. INSPECT VSV FOR ACM (OPERATION) 
    1. Remove the VSV.
    2. Check operation of the VSV when battery positive voltage is applied to the terminals of the VSV connector.

      Battery positive voltage is not applied: 

      The air from pipe G is flowing out through pipes E and H. 

      Battery positive voltage is applied: 

      The air from pipe F is flowing out through pipes E and H. 

      Fig 7: Checking Operation Of VSV When Battery Positive Voltage Is Applied To Terminals Of VSV Connector
      G03036018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE VSV FOR ACM 
    2. OK : Go To Next Step. 
  7. INSPECT TRANSVERSE ENGINE MOUNTING INSULATOR 
    1. Disconnect the vacuum hose from the front engine mount insulator.
    2. Using MITYVAC (Hand-held Vacuum Pump), apply a vacuum of 80 kPa (600 mmHg, 25 in.Hg) and wait for 1 minute.
    3. Make sure there is no needle movement on the MITYVAC.
    4. Check that there is no fluid leakage caused by a broken lower diaphragm.
    Fig 8: Inspecting Transverse Engine Mounting Insulator
    G03036019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE TRANSVERSE ENGINE MOUNTING INSULATOR 
    2. OK : SYSTEM OK 
RENDER: 1.0x

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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.