Lexus LS400 (2000 year). Service manual — part 34

V06277

EITHER SPEAKER DOES NOT WORK

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

11

Is radio operating normally?

Check if GND to power amplifier is OK.

Are +B and +B2 applied to power amplifier?

Is AMP applied to power amplifier?

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

Temporarily install another woofer speaker.
Functions OK?

Is there continuity in speaker wire harness?

Temporarily install another power amplifier.
Functions OK?

Power amplifier faulty.

GND faulty.

Radio receiver assembly faulty.

Replace fuse.

+B and +B2 wire harness faulty.

Check the radio receiver assembly.

Wire harness faulty.

Woofer speaker faulty.

Speaker wire harness faulty.

Radio receiver assembly faulty.

Tape Player

No

Yes

Yes

No

No

No

Yes

No

No

No

No

Yes

Yes

Yes

Yes

No

Yes

Yes

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–213

2076

V03671

Tape Player

Functions OK if different cassette tape inserted?

Operates normally after cleaning the heads?
(See page

BE–203

)

Cassette tape faulty.

Head dirty.

Radio receiver assembly faulty.

Install properly.

Speaker faulty.

Is radio operating normally?

Is speaker properly installed?

Temporarily install another speaker.
Functions OK?

Radio receiver assembly faulty.

SOUND QUALITY POOR (VOLUME FAINT)

12

TAPE JAMMED, MALFUNCTION WITH TAPE SPEED OR AUTO–REVERSE

Tape Player

13

Functions OK if different tape (less than 120 mins.)
is inserted?

Cassette tape faulty.

Remove foreign object.

Head dirty.

Is there a foreign object inside tape player?

Operates normally after cleaning the heads?
(See page

BE–203

)

Radio receiver assembly faulty.

Yes

No

No

No

Yes

Yes

Yes

No

No

Yes

Yes

Yes

No

No

No

Yes

BE–214

–

BODY ELECTRICAL

AUDIO SYSTEM

2077

V06279

CASSETTE TAPE WILL NOT EJECT

Is tape player operating normally?

Cassette tape jammed.

Radio receiver assembly faulty.

Is auto search button of radio operating normally?

Check if DOME fuse is OK?

Replace fuse.

Is +B applied to radio receiver assembly?

Radio receiver assembly faulty.

+B wire harness faulty.

14

Tape Player

CD CANNOT BE INSERTED

15

CD Player

Is CD already inserted?

Eject CD.

Use 4.7 in. (12 cm) disc.

Is 3.2 in. (8 cm) disc being used?

Is auto search button of radio operating normally?

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

Replace
fuse.

Is +B applied to CD auto changer?

+B wire harness faulty.

Is ACC applied to CD auto changer?

ACC wire harness faulty.

GND wire harness faulty.

Wire harness faulty. (to radio receiver assembly)

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.

Radio receiver assembly faulty.

No

Yes

No

Yes

Yes

No

Yes

No

No

Yes

Yes

No

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–215

2078

V06280

CD INSERTS, BUT NO POWER

16

CD Player

Is radio operating normally?

Is +B applied to CD auto changer?

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.

ACC wire harness faulty.

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

Replace fuse.

+B wire harness faulty.

GND wire harness faulty.

Wire harness faulty. (to radio receiver assembly)

Radio receiver assembly faulty.

No

Yes

Yes

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

BE–216

–

BODY ELECTRICAL

AUDIO SYSTEM

2079