LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2005 >> ES 330 >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Emission Control System) >> Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Section 45 (Emission Control System): Inspection

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT VENTILATION VALVE SUB-ASSEMBLY 
    1. Install a clean hose to the ventilation valve.
    2. Inspect the ventilation valve operation.
      Fig 1: Inspecting Ventilation Valve Operation
      G03062064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Blow air into the cylinder head side, and check that air passes through easily.
        CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are harmful.
      2. Blow air into the intake manifold side, and check that air passes through with difficulty.

      If operation is not as specified, replace the ventilation valve.

    3. Remove the clean hose from the ventilation valve.
    Fig 2: Inspecting Ventilation Valve Operation
    G03062065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FUEL TANK CAP ASSEMBLY 
    1. Visually check if the cap and/or gasket are deformed or damaged.
    Fig 3: Inspecting Fuel Tank Cap Assembly
    G03062066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT CHARCOAL CANISTER ASSEMBLY 
    1. Visually check the charcoal canister for cracks or damage.
      Fig 4: Visually Check Charcoal Canister For Cracks Or Damage
      G03062067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the charcoal canister operation.
      1. With the purge port closed, blow air (0.39 kPa, 4.0 gf/cm2 , 0.06 psi) into the vent port, and check that air flows from the air inlet port.
        Fig 5: Inspecting Charcoal Canister Operation
        G03062068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. With the air inlet port closed, blow air (0.39 kPa, 4.0 gf/cm2 , 0.06 psi) into the vent port, and check that air flows from the purge port.
        Fig 6: Checking Air Flows From Purge Port
        G03062069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. With the air inlet port closed, apply vacuum (3.43 kPa, 25.7 gf/cm2 , 1.01 psi) to the vent port, and check that air is sucked in from the purge port.
      Fig 7: Checking Air Sucked From Purge Port
      G03062070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the charcoal canister.

    3. Inspect the air tightness.
      1. With the vent and air inlet ports closed, apply vacuum (3.43 kPa, 25.7 gf/cm2 , 1.01 psi) to the purge port, and check that the vacuum remains stable for 1 minute.
        2. Fig 8: Inspecting Air Tightness
        G03062071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      In order to maintain air tightness, this operation should be performed with the CCV terminal ports closed by your fingers. If operation is not as specified, replace the charcoal canister.

    4. Inspect the diaphragm.
      Fig 9: Inspecting Diaphragm
      G03062072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the air hose between ports A and B.
      2. With the vent, purge and air inlet ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and check that air is sucked in from port B.
      3. With the vent, purge and air inlet ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and measure how long it takes for vacuum to drop.
        Fig 10: Purging Air Hose Between Ports A And B
        G03062073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Vacuum drop time: 10 sec. or more 

        If operation is not as specified, replace the charcoal canister.

      4. Reinstall the air hose between ports A and B.
    5. Inspect VSV for open circuit.
      1. Using an ohmmeter, check the resistance between the terminals.

      Resistance: 

      RESISTANCE SPECIFICATION

      20°C (68°F) 25 to 30 Ω
      100°C (212°F) 32 to 42 Ω

      If the resistance is not as specified, replace the charcoal canister.

      Fig 11: Checking Resistance Between Terminals
      G03062074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Inspect VSV operation.
      1. Check that air flows from port A to ports B and C.
        Fig 12: Checking Air Flows From Port A To Ports B And C
        G03062075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Apply battery positive voltage across the terminals.
      3. Check that the valve is closed.
        Fig 13: Checking Valve
        G03062076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Check that air does not flow from port A to port B.
      5. Check that air flows from port A to port C.
        6. Fig 14: Checking Air Flows From Port A To Port C
        G03062077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the charcoal canister.

  4. INSPECT DUTY VACUUM SWITCHING VALVE 
    1. Inspect the VSV for open circuit.
      1. Using an ohmmeter, check the resistance between the terminals.
        2. Fig 15: Checking Resistance Between Terminals
        G03062078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance: 26 to 30 Ω at 20°C (68°F) 

      If the resistance is not as specified, replace the VSV.

    2. Inspect the VSV for ground.
      1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
        2. Fig 16: Checking Continuity Between Each Terminal And Body
        G03062079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If there is continuity, replace the VSV.

    3. Inspect the VSV operation.
      Fig 17: Inspecting VSV Operation
      G03062080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Check that air does not flow from the part.
      2. Apply battery positive voltage across the terminals.
      3. Check that air flows from the port.

      If operation is not as specified, replace the VSV.

      Fig 18: Checking Air Flows From Port
      G03062081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT AIR FUEL RATIO SENSOR 
    1. Using an ohmmeter, measure the resistance between the terminals.

      Resistance: 

      AIR FUEL RATIO SENSOR SPECIFICATION

      Terminal No. Resistance
      1 (HT) - 2(+B) 0.8 to 1.4 Ω at 20°C (68°F)
      1 (HT) - 2(+B) 1.8 to 3.2 Ω at 800°C (1,472°F)
      1 (HT) - 4(E1) No Continuity

      If the resistance is not as specified, replace the sensor.

      Fig 19: Measuring Resistance Between Terminals
      G03062082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT HEATED OXYGEN SENSOR (BANK1 OXYGEN SENSOR NO. 2) 
    1. Using an ohmmeter, measure the resistance between the terminals.

      Resistance: 

      HEATED OXYGEN SENSOR SPECIFICATION

      Terminal No. Resistance
      1(HT) - 2(+B) 11 to 16 Ω at 20 °C (68 °F)
      1 (HT) - 4(E1) No Continuity

      If the resistance is not as specified, replace the sensor.

      Fig 20: Identifying Heated Oxygen Sensor Terminals (BANK1 OXYGEN SENSOR NO. 2)
      G03062083Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT HEATED OXYGEN SENSOR (BANK2 OXYGEN SENSOR NO. 2) 
    1. Using an ohmmeter, measure the resistance between the terminals.

      Resistance: 

      HEATED OXYGEN SENSOR SPECIFICATION

      Terminal No. Resistance
      1(HT) - 2(+B) 11 to 16 Ω at 20°C (68°F)
      1 (HT) - 4(E1) No Continuity

      If the resistance is not as specified, replace the sensor.

      Fig 21: Identifying Heated Oxygen Sensor Terminals (BANK2 OXYGEN SENSOR NO. 2)
      G03062084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals