LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1994 >> Camry XLE, 2.2 S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Air Induction Systems >> Intake Air Control Valve System >> 3.0L
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Intake Air Control Valve System: 3.0L

  1. Using 3-way connector, connect vacuum gauge to actuator valve. See Fig 1. Start engine. With engine idling, ensure no vacuum reading is obtained.
  2. Fully open throttle and ensure vacuum reading momentarily reads approximately 8 in. Hg and actuator valve rod pulls inward. If actuator valve rod does not pull inward, proceed to next step.
    Fig 1: Checking Actuator Valve Operation (3.0L)
    G92H26754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Disconnect vacuum hose from actuator valve. Using vacuum pump, apply approximately 8 in. Hg of vacuum to actuator valve. Ensure actuator valve rod pulls inward and remains pulled inward for at least one minute. Replace actuator valve if defective. If actuator valve operates correctly, reconnect vacuum hose. Proceed to next step.
  4. Disconnect hoses from vacuum tank, located near driver's side front corner of engine compartment, below battery tray. Apply air pressure to port "B" on vacuum tank. Ensure air passes out port "A". Perform STEP 1. See Fig 2. Apply air pressure to port "A". Ensure air does not pass out port "B". Perform STEP 1. See Fig 2.
  5. Plug port "B" on vacuum tank. Using vacuum pump, apply approximately 8 in. Hg of vacuum to port "A". Perform STEP 2. See Fig 2. Ensure vacuum reading will hold for at least one minute. Replace vacuum tank if defective and recheck system operation. If vacuum tank is okay, reconnect vacuum hoses. Proceed to next step.
    Fig 2: Checking Vacuum Tank (3.0L)
    G92I26755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Disconnect negative battery cable. Remove "V" bank cover, located on top of engine. See Fig 3. Disconnect electrical connector from intake air control valve Vacuum Switching Valve (VSV), located near valve cover. See Fig 3.
    NOTE: It may be necessary to remove emission control valve assembly which contains the intake air control valve VSV and fuel pressure control VSV for access to intake air control valve VSV.
  7. Using ohmmeter, ensure continuity exists between electrical terminals on VSV and resistance is 33-39 ohms. Check that no continuity exists between each electrical terminal and the body of VSV.
  8. Apply air pressure to port "B". Ensure air passes out the filter. Perform STEP 1. See Fig 4. Connect battery voltage and ground to VSV terminals. Apply air pressure to port "B". Ensure air passes out port "A". Perform STEP 2. See Fig 4. Replace VSV if defective. Reconnect negative battery cable. Recheck system operation.
  9. If VSV is okay, reinstall VSV and reconnect negative battery cable. Remove glove compartment for access to Engine Control Module (ECM). Turn ignition on. Using voltmeter, check voltage between terminal No. 6 (Red/Yellow) wire of E9 connector and chassis ground. See Figure, Figure and Figure.
  10. Voltage should be 9-14 volts. If voltage is not within specification, check for defective EFI main relay or wiring harness between EFI main relay and ECM. See EFI MAIN RELAY  under RELAYS. See appropriate wiring diagram in WIRING DIAGRAMS article.
  11. If EFI main relay and wiring harness are okay, check ECM ground circuit. If ECM ground circuit is okay, substitute another ECM and recheck system operation.
Fig 3: Identifying Various Components (3.0L)
G94D45800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Checking Intake Air Control Valve VSV
G92A26757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals