Subaru 2009 IMPREZA Service Manual page 2741

HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
4. DRIVE SIGNAL CHECK TABLE
Fan
Air flow
speed
control Drive signal
control
dial to check
dial
position
position
AUTO
1st
2nd
3rd —
7th
FACE
MODE
AUTO
MODE
1st
MODE
2nd
3rd — MODE
7th
Diagnostic Chart for Self-Diagnosis
A/C
switch No trouble
LED
MIX
Blinking
#1
(Illumi-
MIX
nates for
#2
0.2 sec.
MIX
turns
#3
off for 0.2
MIX
sec.) FRESH/
#4
RECIRC
switch LED is
turned off
#1
Blinking
(Illumi-
#2
nates for
1 sec.
turns off
#3
for 1 sec.)
#4
AC(diag)-12
Short circuit Open circuit
FRESH/ FRESH/
RECIRC RECIRC
switch LED switch LED
blinks blinks
(Illuminates (Illuminates
for 0.2 sec. for 1 sec.
turns off turns off for
for 0.2 sec.) 1 sec.)
When
When
having
currently
malfunctioned
malfunctioning
in the past
Rear window Rear window
defogger defogger
switch LED is switch LED
turned off illuminates