Toyota Camry Manual page 456

Radio
Check if DOME fuse is OK?
Is + B applied to radio?
Yes
Check if GND (wire harness side) to radio?
Radio faulty.
Can cassette tape be inserted in tape player?
Check if DOME fuse is OK?
Is + B applied to radio assembly?
Yes
Check if GND (wire harness side) to radio?
Radio assembly faulty.
BODY ELECTRICAL SYSTEM
PRESET MEMORY DISAPPEARS
– AUDIO SYSTEM
Replace fuse.
+ B wire harness faulty.
GND faulty.
Yes
Radio assembly faulty.
Replace fuse.
+B wire harness faulty.
GND faulty.
BE–137