Toyota PT546-00140, Руководство по устранению неисправностей

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17 NOISE Noise heard occasionally.
oes the noise occur only in the radio?
Does the noise occur in a particular place?
Yes
Yes
No
No
No
Yes
No
Yes
Yes
No
Yes
No
Refer to No.13, No.15, No.16,
No.19, or No.21
Temporarily remove the additional
part. Does the noise stop?
Yes
Check the grounding of the antenna,
antenna cord, choke coil, and noise filter.
Is it OK?
Does the condition get better by exchanging
the choke coil? Exchange the choke coil.
Does the noise occur even pulling out the
defogger terminal?
Does the noise occur even pulling out the
antenna terminal?
Does the noise occur even pulling out the
antenna cord from the headunit?
No
Correct grounding.
Processing the ground properly.
Mixing into the defogger cable.
Improvement of wiring routing
of defogger code.
The parts which added have a
problem. Use different parts.
Mixing into the antenna cable.
Improvement of wiring routing
of antenna code.
Is there any additional installation part
around the receiving antenna?
No
Yes
Electric wave environment with
the influence.
Head unit faulty.
Replace the product.
No
Yes