24
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
Is there continuity 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
POWER COMMIG IN, BUT WOOFER (POWER) AMPLIFIER NOT
OPERATING
−
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.
2291
BE−117