Subaru SVX 1992 Manual page 1017

4-7 (TOO]
AUTOMATIC AI R CONDITIONING SYSTEM
7 . Control Unit (Auto Amp .) I/O Signal
Auto amp. terminal
9 817 615 A~±
8
91 17 615
To
i 16 b To
i17 a
C4-666
Fig. 176
Content
Connector Terminal
Signal (V)
No . No .
BATT voltage (Memory back-up) i17 a1-body
BATT voltage
13 - 14 (engine running)
IGN power supply i17 a2-body
Battery voltage (ignition switch ON)
13 - 14 (engine running)
ACC power supply
i16 b18-body
BATT voltage 0 (engine cranking) ; BATT voltage
(OFF : ignition in START or diagnosis system reset) during engine starts
Sensor standard voltage i16 b1-body 0 (ignition switch ON) - 5V
Auto amplifier ground circuit i17 a16-body 0 (ignition switch ON) - circuit constantly grounded
Sensor ground circuit i16 b11-body
0 (ignition switch ON) - continuity exists
In-vehicle sensor - -
Ambient sensor i16 b2-b11
Evaporator sensor i16 b3-b11
Approx . 5 (ignition switch ON and sensors discon-
Refrigerant temperature i16 b4-b11
nected)
Water temperature sensor i16 b12-b11
Sunload sensor i16 b13-b11
BATT voltage (AUTO mode) positive (+ at terminal
Air mix door motor i17 a5-a6
"a5" and negative 0 at "a6" [temperature set at
18°C (65°F)] ; negative 0 at terminal "a5" and posi-
tive 0+ at "a6" [temperature set at 32°C (85°F)]
Approx . 0.5 [temperature set at 18°C (85°F) in AUTO
Air mix door motor P .B .R . i16 b14-b11 mode]
Approx . 4.5 [temperature set at 32°C (85°F)]
BATT voltage (ignition switch ON in MANUAL
Mode door motor i17 a3-a4
mode) ; positive +Q at terminal "a3" and negative
at "a4" (VENT) ; negative Q at "a3" and positive +0
at "a4" (DEF)
Mode door motor P .B .R . i16 b15-b11
BATT voltage (ignition switch ON in MANUAL mode)
Approx . 4.5 (VENT) ; approx . 0 .5 (DEF)
Mode door FRS voltage i16 b7-b11 BATT voltage (DEF switch ON)
Mode door REC voltage
i16 b5-b11 BATT voltage (CIRC switch ON)
OFF relay
i17 a12-body
GATT voltage (ignition switch ON)
HI relay i17 a13-body
A/C relay i17 a14-body
BATT voltage (ignition and A/C switches ON)
0 (A/C switch OFF)
Illumination control signal i16 b10-body BATT voltage (ignition and lighting switches ON)
°FPC select signal i16 b16-b11
°C is shown (select switch ON)
° F is shown (select switch SHORT)
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