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BE–90
BODY ELECTRICAL
24
Power Amplifier
–
AUDIO SYSTEM
POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT
OPERATING
Is tape player operating normally?
YES
Radio assembly faulty.
NO
Check if ACC and RADIO2 fuses are OK?
NG
Replace fuse(s).
OK
Check if ACC relay is OK?
NG
Replace ACC relay (See page BE–10).
OK
Is power supplied to ACC terminal of power amplifier?
NO
ACC wire harness faulty.
YES
Check if ECU–B1 and RADIO1 fuses are OK?
NG
Replace fuse(s).
OK
Is power supplied to +B terminal of power amplifier?
NO
+B wire harness faulty.
YES
NG
Check if GND (wire harness side) of power amplifier
grounded normally?
GND faulty.
OK
Is power supplied to ACC terminal of radio assembly?
NO
Power amplifier faulty.
YES
Is power supplied to +B terminal of radio assembly?
NO
Power amplifier faulty.
YES
NG
Check if GND (wire harness side) of radio assembly
grounded normally?
GND faulty.
OK
Is there continuity in speaker wire harness?
NO
Speaker wire harness faulty.
YES
Temporarily install another speaker. Functions OK?
YES
Speaker faulty.
NO
Hiss noise from speaker?
YES
NO
Power amplifier faulty.
Recheck system after repair.
Radio assembly faulty. Recheck system after repair.
2003 MR2 (RM967U)
Author:
Date:
1530