I am having a similar but in a way different issue. I had my steering bushes and others fixed on lathe ... I think this made the whole thing jamed ... and now after sometime of driving my steering gets hard, I can feel the EPS working but not its fullest... Can you @ser_gtr help me with that please, over here https://www.pakwheels.com/forums/wheels-tyres-suspension-brakes-steering/211642-strange-power-steering-issue-carolla-2010-a
GOTO this link and you will find answer, its default techincal issue by company.http://www.autonews.com/article/20130703/COPY01/307039957/toyota-will-recall-185000-vehicles-globally-for-power-steering-flaw
My Issue has been solved it was due to metallic part replaced with Teflon rubber by the lathe machine guyhttps://www.pakwheels.com/forums/wheels-tyres-suspension-brakes-steering/211642-strange-power-steering-issue-carolla-2010-a