ok folks, found another kind of tit-tit sound, 1-is from the door lock, 2-from the power window frame near to the door lock.
Let me explain, the door lock can be resolve by applying thick greese to the latch. Problem solve. This happend when riding on rough road, there will be a tit tit sound in between door panel and pillar B. This is due to door latch swaying left and right hitting the door male connector at the pillar B. Perodua use the wrong greese!!
when taking corner, the power window frame(near to the door lock mechanism) that allow the window to slide up and down will rattle due to pressure. and that pressure will pass from the door panel to the frame rod holder; the rod holder will pass the pressure to window sliding panel hence causing tit tit sound when taking corner at high speed. let say 40-60kmj.
Solution is claim a new power window frame. i doubt this will solve the problem. This is not a problem due to design nor quality issue. This is due to nature of gravity and can be solve by installing thick dampering flexable rubber at the sliding frame holder. The main function of fixing dampering rubber at the window sliding rod holder is to prevent or minimize rattling pass on to the window.
This happend to many cars, saw many car model have this rubber foam work as dampering for power window frame to prevent rattling.
Added on June 28, 2012, 11:40 amdun expect spood feeding, i hate spoon feeding. if want, i can show you guys how to do it and you can proceed to do it on your own. :-)
anyway, my car is so damm quiet after installing dampering layer, follow by sound proofing layer, and solve all the possible tit tit rattling sounds all together. me so happy!