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1997 Toyota RAV4 Question: what should the voltage be at the EGR VSV connection



sophie19920, 2.0L 4 Cylinder, Bath, NY, August 17, 2011, 12:17

PO 401 NEW VSV shows no vacuum. EGR line off Q port attached to
vacuum pump ing. on o vac. with ign. off will some time hold 15 in. when ing is turned on it looses vacuum. Replaced VSV & modulator. no changes. I have been able to find the suggested voltage @ the VSV plug. po401 (2 codes)

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  • Answer #1

    August 18, 2011, 15:53

    I would go to this link and follow this article. I wrote this as I do Emissions Diagnosis and Repair at a Gold Shield Station in Calif. A P0401 is somewhat common on Toyota and they can be stubborn to resolve. The passages have to be 'perfecto' clean.


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