Display Indicates When Power Switch Turned To 'On', But No Sound (Including 'Noise') Is Produced - Lexus 2005 IS300 User Manual

BE-180
2 Radio
Is tape player operating normally?
No
Check if RAD-No.2 fuse is OK?
OK
Is power supplied to ACC terminal of power amplifier?
Yes
Check if RAD-No.1 fuse is OK?
OK
Is power supplied to +B terminal of power amplifier?
Yes
Check if GND (wire harness side) of power amplifier
grounded normally?
OK
Is power supplied to ACC terminal of radio receiver?
Yes
Is power supplied to +B terminal of radio receiver?
Yes
Check if GND (wire harness side) of radio assembly
grounded normally?
OK
Does continuity exist in speaker wire harness?
Yes
Temporarily install another speaker. Functions OK?
No
Hiss noise from speaker?
Yes
Radio assembly faulty. Recheck system after repair.
2005 LEXUS IS300 (RM1140U)
BODY ELECTRICAL
DISPLAY INDICATES WHEN POWER SWITCH TURNED TO
"ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED
- AUDIO SYSTEM
Radio assembly faulty.
Yes
Replace fuse.
NG
ACC wire harness faulty.
No
Replace fuse.
NG
+ B wire harness faulty.
No
GND faulty.
NG
ACC wire harness faulty.
No
+B wire harness faulty.
No
GND faulty.
NG
Speaker wire harness faulty.
No
Speaker faulty.
Yes
Power amplifier faulty.
No
Recheck system after repair.
Author : Date :
2184