Contents: Examination ↓ Replacement ↓
Examination
Connecting the tachometer to the IG terminal of the data link connector located in the lower part of the engine compartment
Checking the resistance between the electrical connector terminals of the control air valve +BI and SCC and +BI and SCO on a four-cylinder engine
Checking the resistance between the electrical connector terminals of the control air valve +BI and RSC and +B and RSO on the 1MZ-FE V6 engine
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Checking the resistance between the electrical connector contacts of the air control valve B1 and S1 and B1 and S3, as well as between contacts B2 and S2 and contacts B2 and S4
1. Apply the handbrake and set the shift lever to neutral. Connect the tachometer according to the manufacturer's instructions. Connect the wire from the tachometer to the IG terminal of the electrical connector (see fig. Connecting the tachometer to the IG contact of the data communication connector located in the lower part of the engine compartment). Start the engine, warm it up to normal operating temperature and measure the idle speed.
2. Using an additional wire, short-circuit contacts TE1 and E1 of the electrical connector.
3. When contacts TE1 and E1 are closed, the engine crankshaft speed should increase to 1000–2000 rpm within 5 seconds. Then idle speed should be established.
4. Remove the additional shorting wire.
5. Disconnect the electrical connector from the IAC air control valve.
6. Measure the resistance between the center terminal and the side terminals of the electrical connector (see Fig. Checking the resistance between the air check valve electrical connector terminals +BI and SCC and +BI and SCO on a four-cylinder engine, Fig. Checking the resistance between the air check valve electrical connector terminals +BI and RSC and +B and RSO on a 1MZ-FE V6 engine, Fig. Checking the resistance between the air check valve electrical connector terminals B1 and S1 and B1 and S3, as well as between terminals B2 and S2 and terminals B2 and S4).
7. Connect the electrical connector to the air check valve.
Replacement
Fastening elements of the air control valve
Fastening elements of the air control valve on the 3VZ-FE V6 engine
1. Remove the throttle body.
2. Unscrew the screws and remove the air check valve together with the gasket (see fig. Fastening elements of the check air valve and fig. fig. Fastening elements of the check air valve on the 3VZ-FE V6 engine).
3. The installation of the air check valve is carried out in the reverse order of removal.