Hi, I have just read through your posts on the Vitz and it EXACTLY similar to the problems I am having with mine ( mine is also 2006 year with 1000cc engine and CVT gearbox.
I have very little forward drive power it is like the gearbox has no fluid but the fluid is perfect . I still replaced with correct TC fluid for CVT box but no change. Can you tell me is the oil cooler outside of gearbox can you describe for me ??, also where is the filter , I looked everywhere but no sign .
I really appreciate you help, the person that your pal Sharabhi referred you to is a brilliant mechanic as here no one knows how to fix.
My engine problem is that after driving for maybe 20 mins the management light comes on but car drives perfect but emissions are very high, I have checked all sensors air mass, oxygen and the timing chain is good.
Did you have this problem too,
Please help me if you can .