Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

Does the noise occur only in the radio?
1. NO: Refer to 24. DRIVING DIRECTION IS OPPOSITE TO MOVING DIRECTION OF VEHICLE POSITION MARK. (It occurs in the cassette and CD.).
2. YES: Go to Next Step
Does the noise occur in a particular place?
1. YES: An electric environment.
2. NO: Go to Next Step
Is there any additional installation part around the glass imprinted antenna? (Sun shade film, telephone antenna etc.)
1. YES: Does the noise stop by removing it? Influence of the film or the noise radiation of the additional installation part.
2. NO: Go to Next Step
Does the noise occur even pulling out the antenna cord from the radio?
1. YES: Check the radio.
2. NO: Go to Next Step
Does the noise occur even pulling out the antenna terminal on the glass surface?
1. YES: Noise mixing into the antenna cable.
2. NO: Go to Next Step
Isn't there any adhesive (Butyl rubber) stuck on the bases of the antenna terminal, defogger terminal and bus bar?
1. YES: Failure of glass installation. Must plane the butyl rubber.
2. NO: Go to Next Step
Does the noise occur even pulling out the defogger terminal?
1. YES: Interfering noise from the defogger line and choke coil.
2. NO: Go to Next Step
Check the grounding of the antenna, antenna cord, coke coil, and noise filter (See INSPECTION ).
1. NG: Grounding failure.
2. OK: Go to Next Step
Does the condition get better by replacing the choke coil?
1. YES: Replace the choke coil.
2. NO: Go to Next Step
Does the condition get better by replacing the antenna cord.
1. YES: Replace the antenna cord.
2. NO: Go to next step.
Noise radiates directly to the antenna from the generation source.