Cannot Set Station Select Button, Preset Memory Disappears - Toyota T100 1996 Service Manual

7 Radio
R : Radio S : Radio + Tape Player
P : Radio − Tape Player (Separate Power Amplifier)
S U P
Can cassette tape be inserted in tape player?
No
R
Check if DOME fuse is OK?
OK
R S U
Is B + applied to power amplifier?
Check if GND (wire harness side) to
power amplifier?
R S U P
Is B + applied to radio or radio assembly?
Yes
Check if GND (wire harness side) to radio or
radio assembly?
OK
Radio or radio assembly faulty.
1996 TOYOTA T100 (RM449U)
BODY ELECTRICAL −
CANNOT SET STATION SELECT BUTTON, PRESET
MEMORY DISAPPEARS
U : Radio − Tape Player (Built−in Power Amplifier)
Yes
NG
P
Yes
OK
No
NG
AUDIO SYSTEM
Radio assembly faulty.
Replace fuse.
No
B + Wire harness faulty.
NG
GND faulty.
R S U B + Wire harness faulty.
P
Power amplifier faulty.
R S U GND faulty.
P Power amplifier faulty.
BE−69