Toyota PT546-00140, Troubleshooting Manual

Page: 14 / 41

16 NOISE Noise produced when engine starts.
No
Yes
No
Whistling noise which becomes high-pitched
when accelerator strongly depressed,
disappears shortly after engine stops.
Possibility of
vehicle side factors.
Noise OK if another
head unit .
Head unit faulty.
.
Yes
No
Whistling noise occurs when A/C is operation.
Scratching noise occurs during sudden acceleration,
driving on rough roads or when ignition switch is
turned on.
Murmuring sound stops when engine stops.
Scratching noise occurs while engine is running and
continues a while even after engine stops.
Yes
Yes
Yes
Yes
No
No
No
Other type of noise.
Yes
No