Toyota Celica 2005 Repair Manual page 2279

BE−104
2 Radio
Is tape player operating normally?
No
Check if ECU−ACC fuse is OK.
OK
Is power supplied to ACC terminal of power amplifier?
Yes
Check if RAD 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 ACC terminal of radio receiver?
Yes
Is power supplied to +B terminal of radio receiver?
Yes
Check if GND (wire harness side) of power amplifier
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 CELICA (RM1131U)
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
BU+ wire harness faulty.
No
GND faulty.
NG
Power amplifier faulty.
No
Power amplifier faulty.
No
GND faulty.
NG
Speaker wire harness faulty.
No
Speaker faulty.
Yes
Power amplifier faulty.
No
Recheck system after repair.
2278