Mitsubishi 3000GT Workshop Manual Supplement page 29

HEATER,
AIR
CONDITIONER AND VENTILATION
-
Troubleshooting
55-17
Inspection procedure
11
Defroster
function does not operate. Probable cause
lf the defroster function does not operate when the defroster switch is turned
on,
lhe
cause
is
probably a
malfunction
of the
A,/C
or of the air
outlet
port
changeover
circuit.
o
Malfunclion
of
air conditioner drive
system
o
Malfunction
of
mode selection damper drive
system
.
Malfunction
of
connector
or
harness
.
Malfunction
of
A/C-ECU
I
Can an oper"ting
sornd
be heard
*hen
the defrosle,
s*ircn-ß
;-+t
fnspe"W
f
l
uperareu
i
I
{ves
I
YES
RePair
{o*
Does the
A,/C operate?
Inspection procedure
2
(Refer
to
P.55-12.)