lexus Workshop Repair Guides

Lexus Workshop Service and Repair Manuals

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Thermal Vacuum Valve - EVAP: Testing and Inspection

THERMAL VACUUM VALVE (TVV) FOR EVAP INSPECTION

1. Drain engine coolant.

2. Remove TVV from cylinder head.

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Disconnect the 2 vacuum hoses from the TVV.

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Remove the TVV.

3. Inspect TVV operation.

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Cool the TVV to below 45°C (113°F) with cool water.

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Check that air flows from port J to the air filter.

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Heat the TVV to above 64°C (147°F) with hot water.

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Check that air flows from port J to K.

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If operation is not as specified, replace the TVV.

4. Reinstall TVV.

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Apply adhesive to 2 or 3 threads of the TVV.

Adhesive:

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