Toyota Celica 2005 Repair Manual page 2283

BE−108
7 Radio
Is sound quality always bad?
Yes
Is tape player operating normally?
No
Is speaker properly installed?
Yes
Temporarily install another speaker. Functions OK?
No
Radio assembly or power amplifier faulty.
Recheck system after repair.
8 Radio
Is cassette tape inserted in tape player?
No
Check if RADIO fuse is OK.
OK
Is power supplied to BU+ terminal of power amplifier?
Yes
Check if GND (wire harness side) of power amplifier
grounded normally.
OK
Is power supplied to BU+ terminal of radio assembly?
Yes
Check if GND (wire harness side) of radio assembly
grounded normally.
OK
Radio assembly faulty.
2005 CELICA (RM1131U)
BODY ELECTRICAL
SOUND QUALITY POOR
Is sound quality bad in certain
No
areas only?
Is tape player operating normally?
Radio assembly or power
amplifier faulty.
Yes
PRESET MEMORY DISAPPEARS
− AUDIO SYSTEM
No
No
No
Yes
Radio assembly faulty.
Yes
Replace fuse.
NG
BU+ wire harness faulty.
No
GND faulty.
NG
Power amplifier faulty.
No
Power amplifier faulty.
NG
2282
Poor signals, poor location.
Yes
Yes
Radio assembly faulty.
Radio assembly faulty.
Install properly.
Speaker faulty.