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Home >> Toyota >> 2013 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 162 (EGR Function Testing - TOYOTA) >> EGR Function Testing - TOYOTA >> Test 1 >> Double Diaphragm Valve

Double Diaphragm Valve

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Ensure all vacuum hoses are routed properly. Warm engine to normal operating temperature. With engine at idle, switch hoses on EGR valve, carburetor should make bubbling noise. If bubbling noise is not heard, check other EGR system controls. See appropriate article.

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