Lexus LS400 (2000 year). Service manual - part 36

V06285

CD WILL NOT EJECT

21

Is auto search button of radio operating normally?

CD Player

Is +B applied to CD auto changer?

Check if RADIO No.1 and RADIO No.2 fuses are
OK?

Replace fuse.

+B wire harness faulty.

ACC wire harness faulty.

GND wire harness faulty.

Wire harness faulty. (to radio receiver assembly)

Radio receiver assembly faulty.

Is ACC applied to CD auto changer?

Check if GND (wire harness side) to CD auto
changer is OK?

Is there continuity in CD auto changer wire har-
ness? (to radio receiver assembly)

Temporarily install another CD auto changer.
Functions OK?

CD auto changer faulty.

NO POWER COMING IN

22

Are +B and +B2 applied to power amplifier?

Amplifier

Power amplifier faulty.

Replace fuse.

Power amplifier.

Wire harness faulty.

GND faulty.

Radio receiver assembly faulty.

Check if GND to body is OK.

Is there continuity in wire harness? (Radio receiver
to power amplifier)

Is ACC applied to power amplifier?

AMP fuse is OK?

No

Yes

No

Yes

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Yes

Yes

Yes

Yes

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–221

2084

V06286

EITHER SPEAKER DOES NOT WORK

23

Amplifier

Is power amplifier operating normally?

Is hiss produced by non–functioning speaker?

Is there continuity in speaker wire harness?

Temporarily install another speaker.
Functions OK?

Power amplifier faulty.

Radio receiver assembly faulty.

Radio receiver assembly faulty.

Speaker wire harness faulty.

Speaker faulty.

No

Yes

Yes

No

No

Yes

Yes

No

Install properly.

Install properly.

Each system faulty.

Is speaker properly installed?

Is each system correctly installed?

With vehicle stopped, lightly tap each system.
Is noise produced?

Noise produced by static electricity accumulating in the vehicle body.

NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING

24

Noise

No

Yes

Yes

No

No

Yes

BE–222

–

BODY ELECTRICAL

AUDIO SYSTEM

2085

V06356

Whistling noise which becomes high– pitched when
accelerator strongly depressed, disappears shortly
after engine stops.

NOISE PRODUCED WHEN ENGINE STARTS

25

Noise

Alternator noise.

A/C noise.

Fuel gauge noise.

Horn noise.

Ignition noise.

Turn signal noise.

Washer noise.

Engine coolant temp. gauge noise.

Wiper noise.

Other type of noise.

Scraping noise in time wiper beat.

Scratching noise occurs while engine is running
and continues a while even after engine stops.

Noise occurs during window washer operation.

Tick–tock noise, occurs in co–ordination with blink-
ing of flasher.

Murmuring sound, stops when engine stops.

Clicking sound heard when horn button is pressed,
then released. Whirring/grating sound when
pushed continuously.

Scratching noise occurs during sudden accelera-
tion, driving on rough roads or when ignition switch
is turned on.

Whining noise occurs when A/C is operation.

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

No

No

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–223

2086

V08552

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 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 

BE–203

)

Does the noise occur even pulling out
the defogger terminal?

Does the condition get better by exchanging
the antenna cord.

Radiate directly to the antenna from the
generation source.

Does the condition get better by exchanging
the choke coil?

Exchange the antenna cord.

Exchange the choke coil.

Interfering noise from the defogger line
and choke coil.

Grounding failure.

Failure of glass installation.
Muse plane the butyl rubber.

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.25.

(It occurs in the cassette
and CD.)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

No

No

BE–224

–

BODY ELECTRICAL

AUDIO SYSTEM

2087