Lexus ES300 (1997 year). Manual — part 136
V08481
2
Radio
DISPLAY INDICATES WHEN POWER SWITCH TURNED TO
”ON”, BUT NO SOUND (INCLUDING ”NOISE”) IS PRODUCED
+ B wire harness faulty.
GND faulty.
Power amplifier faulty.
Speaker wire harness faulty.
GND faulty.
Check if GND (wire harness side) to power amplifier is OK?
Is tape player operating normally?
Check if RAD–No.2 fuse is OK?
Is ACC applied to power amplifier?
Is + B applied to power amplifier?
Yes
NG
No
OK
No
No
No
No
OK
OK
OK
Yes
Yes
Yes
Yes
NG
NG
NG
Check if RAD–No.1 fuse is OK?
Is + B applied to radio assembly?
Radio assembly faulty. Recheck system after repair.
Replace fuse.
ACC wire harness faulty.
Is ACC applied to radio assembly?
Check if GND (wire harness side) to radio assembly is OK?
Radio assembly faulty.
Replace fuse.
Is there continuity in speaker wire harness?
Temporarily install another speaker. Functions OK?
Hiss noise from speaker?
Yes
Yes
No
No
No
Yes
Power amplifier faulty.
Power amplifier faulty.
Recheck system after repair.
Speaker faulty.
BE–150
–
BODY ELECTRICAL
AUDIO SYSTEM
1534
1997 LEXUS ES300 (RM511U)
V08482
Speaker wire harness faulty.
Is tape player operating normally?
Yes
No
Radio assembly faulty.
Recheck system after repair.
Radio assembly faulty.
Temporarily install another speaker? Functions OK?
Power amplifier faulty. Recheck system after repair.
Speaker faulty.
4
Radio
ANY SPEAKER DOSE NOT WORK
5
Radio
EITHER AM OR FM DOES NOR WORK
FEW PRESET TUNING BANDS
Is hiss noise produced by non–functioning speaker?
Is there continuity in speaker wire harness?
Problem with radio wave signals or location?
Are both AM and FM defective?
Yes
Yes
No
Yes
No
No
3
Radio
NOISE PRESENT, BUT AM–FM NOT OPERATING
Go to No.25
Radio faulty.
If radio side faulty.
Radio assembly faulty.
Go to No.16
Is tape player operating normally?
Radio assembly faulty.
Is power for the antenna being output from the radio assembly?
Hiss noise from speaker?
Temporarily install another speaker. Functions OK?
Radio assembly faulty. Recheck system after repair.
Speaker faulty.
Power amplifier faulty.
Recheck system after repair.
Poor signals, poor location.
No
Yes
Yes
No
No
No
Yes
Yes
Yes
Yes
No
No
–
BODY ELECTRICAL
AUDIO SYSTEM
BE–151
1535
1997 LEXUS ES300 (RM511U)
V08549
6
Radio
POOR RECEPTION
Is the condition bad in comparison with other vehicle?
Are there any additional installation parts?
(Sun shade film, telephone antenna, etc.)
Check if there is any scratch and breaking of a wire on
the glass antenna and the defogger pattern.
(visual check. tester)
)
Is the contact of the plug jack of the radio OK?
Does the condition get better by using the outer
antenna (such as pillar antenna)?
Is the contact of the antenna terminal on the glass
surface and the defogger terminal?
Is the continuity of the antenna cord OK?
Check the grounding of the antenna, antenna cord,
choke coil, and noise filter. (See page
)
Does the condition get better by exchanging
the choke coil?
Does the condition get better by exchanging the
antenna cord?
Take a measure for contact.
An electric wave environment.
Does the condition get better if removing them?
Influence of additional installation parts.
Influence of the sun shade film.
Repair. (See page
Check the radio.
Take a measure for contact.
Grounding failure.
Exchange the antenna cord.
Exchange the choke coil.
Exchange the antenna cord.
Yes
No
Exchange the glass.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
NG
OK
BE–152
–
BODY ELECTRICAL
AUDIO SYSTEM
1536
1997 LEXUS ES300 (RM511U)
V08483
7
Radio
SOUND QUALITY POOR
Yes
No
Yes
NG
OK
Is sound quality always bad?
Is tape player operating normally?
Poor signals, poor
location.
Radio assembly faulty.
Install properly.
Speaker faulty.
Is tape player operating normally?
Is speaker properly installed?
Radio assembly or power amplifier faulty.
Recheck system after repair.
Temporarily install another speaker. Functions OK?
Is sound quality bad in
certain areas only?
Radio assembly or power
amplifier faulty.
Can cassette tape be inserted in tape player?
Check if RADIO No.1 fuse is OK?
Is +B applied to power amplifier?
Check if GND (wire harness side) to power amplifier?
Is +B applied to radio assembly?
Radio assembly faulty.
Replace fuse.
+B wire harness faulty.
GND faulty.
Power amplifier faulty.
8
Radio
PRESET MEMORY DISAPPEARS
No
Radio assembly faulty.
No
No
No
No
Yes
Yes
Yes
Power amplifier faulty.
Check if GND (wire harness side) to radio assembly?
Radio assembly faulty.
Yes
Yes
Yes
No
No
No
NG
NG
OK
OK
Yes
–
BODY ELECTRICAL
AUDIO SYSTEM
BE–153
1537
1997 LEXUS ES300 (RM511U)
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