Toyota Celica 2005 Repair Manual page 2291

BE−116
23 Power Amplifier
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 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 ACC terminal of radio assembly?
Yes
Is power supplied to B 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
NO POWER COMING IN
− 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 or wire harness faulty.
No
Power amplifier or wire harness faulty.
No
GND faulty.
NG
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