Lexus GS300/400 (2000 year). Service manual - part 64
26
Noise
NOISE OCCURS
No
Yes
NG
OK
Does the noise occur only in the radio?
Does the noise occur in a particular place?
Is there any additional installation part
around the glass imprinted antenna?
(Sun shade film, telephone antenna etc.)
Does the noise occur even pulling out the
antenna cord from the radio?
Does the noise occur even after pulling out the
antenna terminal on the glass surface?
Isn’t there any adhesive (Butyl rubber)
stuck on the bases of the antenna
terminal, defogger terminal and bus bar?
Check the grounding of the antenna,
antenna cord, coke coil, and noise filter.
(See page
Does the noise occur even after pulling out
the defogger terminal?
Does the condition get better by replacing
the antenna cord.
Noise rediates directly to the antenna from the
generation source.
Does the condition get better by replacing
the choke coil?
Replace the antenna cord.
Replace the choke coil.
Interfering noise from the defogger line
and choke coil.
Grounding failure.
Failure of glass installation.
Must plane the butyl rubber.
Noise mixing into the antenna cable.
Check the radio.
Influence of the film or the noise radiation
of the additional installation part.
Does the noise stop by removing it?
An electric environment.
Refer to No.27.
(It occurs in the cassette and CD.)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
BE–214
–
BODY ELECTRICAL
AUDIO SYSTEM
2515