Avalon, Camry, Camry Solara & Sienna
- Remove "V" bank cover located on top of engine. See Fig 1, Fig 2 and Fig 3 . Disconnect electrical connector and vacuum hoses from intake air control valve Vacuum Switching Valve (VSV). See Fig 1, Fig 2 and Fig 3 . It may be necessary to remove emission control valve set which contains various vacuum switching valves for access to intake air control valve VSV.
- Using ohmmeter, check that continuity exists between electrical terminals on intake air control valve VSV and that resistance is 33-39 ohms at 68°F (20°C). If contiunuity exists and resistance is within specification, go to next step. If no continuity exists or resistance is not within specification, replace intake air control valve VSV.
- Using ohmmeter, ensure no continuity exists between each electrical terminal and body of intake air control valve VSV. If continuity does not exist between electrical terminal and body of intake air control valve VSV, go to next step. If continuity exists between electrical terminal and body of intake air control valve VSV, replace intake air control valve VSV.
- Apply air pressure to port "B" on intake air control valve VSV. Ensure air flows from the filter. Perform STEP 1 in illustration. See Fig 4. Apply battery voltage and ground to electrical terminals on intake air control valve VSV. Apply air pressure to port "B" on intake air control valve VSV. Ensure air flows from port "A" and not from the filter. Perform STEP 2 in illustration. See Fig 4. If intake air control valve VSV operates properly, reinstall intake air control valve VSV and go to next step. If intake air control valve VSV does not operate properly, replace intake air control valve VSV and recheck system operation.
- On Avalon, Camry and Camry Solara, remove glove box for access to Engine Control Module (ECM). On Sienna, remove passenger's side lower instrument panel cover for access to Engine Control Module (ECM). On all models, for illustration of ECM location, see THEORY & OPERATION article. Note ECM electrical connector terminal identification. See Figure, Figure and Figure
. Turn ignition on. Using voltmeter, check voltage at specified ECM terminal(s). See ECM TERMINAL IDENTIFICATION FOR INTAKE AIR CONTROL VALVE VSV table. This is the wire from intake air control valve VSV to ECM.ECM TERMINAL IDENTIFICATION FOR INTAKE AIR CONTROL VALVE VSV
Application ECM Connector No. ECM Terminal No. & Wire Color Avalon E4 (1) 17 (Red/Yellow) E5 (2) 15 (White/Red) Camry & Camry Solara E11 17 (Red/Yellow) Sienna E12 17 (Red/Yellow) (1) This is for intake air control valve No. 1 VSV. (2) This is for intake air control valve No. 2 VSV. - Voltage should be 9-14 volts. If voltage is within specification, go to next step. If voltage is not within specification, check for defective EFI main relay, or open or short in wiring harness and connectors between EFI main relay and ECM. See EFI MAIN RELAY under MOTORS & RELAYS. See appropriate wiring diagram in WIRING DIAGRAMS article.
- Disconnect hoses from vacuum tank. Vacuum tank is located near driver's side front corner of engine compartment, below battery tray. Apply air pressure to port "B" on vacuum tank. Ensure air flows from port "A". Perform STEP 1 in illustration. See Fig 5. Apply air pressure to port "A". Ensure air does not flow from port "B". Perform STEP 2 in illustration. See Fig 5.
- Plug port "B" on vacuum tank. Using vacuum pump, apply 7.9 in. Hg of vacuum to port "A" on vacuum tank. Perform STEP 3 in illustration. See Fig 5. Ensure vacuum reading will hold for at least one minute. If vacuum tank is defective, replace vacuum tank and recheck system operation. If vacuum tank is okay, reconnect vacuum hoses and check ECM ground circuit. See appropriate wiring diagram in WIRING DIAGRAMS. If ECM ground circuit is okay, replace ECM. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002