Lexus LS400 (2000 year). Manual — part 33
V06273
4
Radio
EITHER SPEAKER DOES NOT WORK
Is tape player operating normally?
Is hiss produced by non–functioning speaker?
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)
Is there continuity in speaker wire harness?
Temporarily install another speaker.
Functions OK?
Radio receiver assembly faulty.
Radio receiver assembly faulty.
Radio receiver assembly faulty.
GND fault.
+B and +B2 wire harness faulty.
Check the radio receiver assembly.
Wire harness faulty.
Speaker wire harness faulty.
Speaker faulty.
No
Yes
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
–
BODY ELECTRICAL
AUDIO SYSTEM
BE–209
2072
V03663
5
Radio
EITHER AM OR FM DOES NOT WORK, RECEPTION POOR (VOLUME FAINT),
FEW PRESET TUNING BANDS
6
Radio
SOUND QUALITY POOR
Problem with radio wave signals or location?
(See page
Are both AM and FM defective?
Go to No.28
Is tape player operating normally?
Temporarily install another speaker. Functions
OK?
Radio receiver assembly faulty.
Poor signals, poor location.
Radio receiver assembly faulty.
Radio receiver assembly faulty.
Speaker faulty.
Is sound quality always bad?
Is tape player operating normally?
Is speaker properly installed?
Temporarily install another speaker. Functions
OK?
Radio receiver assembly faulty.
Go to step 6–A.
Go to No.28.
Install properly.
Speaker faulty.
Radio receiver
assembly faulty.
If radio side faulty
6–A.
Is sound quality bad in certain areas only?
Radio receiver assembly faulty.
Poor signals, poor location.
No
Yes
No
Yes
Yes
Yes
If radio side faulty
No
No
Yes
No
No
No
Yes
Yes
No
Yes
No
Yes
BE–210
–
BODY ELECTRICAL
AUDIO SYSTEM
2073
V06275
7
Radio
CANNOT SET STATION SELECT BUTTON, PRESET MEMORY DISAPPEARS
8
Tape Player
CASSETTE TAPE CANNOT BE INSERTED
Can cassette tape be inserted in tape player?
GND faulty.
Check if DOME and RADIO No.2 fuses are OK.
Are ACC and +B applied to radio receiver assem-
bly?
Check if GND (wire harness side) to radio is OK.
Radio receiver assembly faulty.
Radio receiver assembly faulty.
Replace fuse.
ACC and +B wire harness faulty.
GND faulty.
Is there a foreign object inside tape player?
Remove foreign object.
Radio receiver assembly faulty.
Is auto search button of radio operating normally?
Check if DOME and RADIO No.2 fuses are OK.
Replace fuse.
Are ACC and +B applied to radio receiver assem-
bly?
Check if GND (wire harness side) to radio receiver
assembly is OK?
ACC and +B wire harness faulty.
Radio receiver
assembly faulty.
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Yes
–
BODY ELECTRICAL
AUDIO SYSTEM
BE–211
2074
V06276
9
CASSETTE TAPE INSERTS, BUT NO POWER
Is tape operating normally?
Check if DOME and RADIO No.2 fuses are OK.
Is ACC applied to radio receiver assembly?
ACC wire harness faulty.
Radio receiver assembly faulty.
Replace fuse.
Radio receiver assembly faulty.
Functions OK if different cassette tape inserted?
Is radio operating normally?
Is there continuity in speaker wire harness?
Temporarily install another speaker.
Functions OK?
Radio receiver assembly faulty.
Cassette tape faulty.
Radio receiver assembly faulty.
Speaker wire harness faulty.
Speaker faulty.
No
Yes
Tape Player
Yes
Yes
No
No
10
POWER COMING IN, BUT TAPE PLAYER NOT OPERATING
Tape Player
Yes
Yes
Yes
Yes
No
No
No
No
BE–212
–
BODY ELECTRICAL
AUDIO SYSTEM
2075
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