Subaru Legacy 2004 Service Manual page 3421

Terminal No.
A1 Battery power supply
A2 ACC power supply
Mode door actuator position sig-
A3
nal
Air mix door actuator position sig-
A4
nal
A5 In-vehicle sensor
A6 Sunload sensor
A8 Sensor power supply
A9 Ignition power supply
A10 A/C cut signal
A13 Evaporator center
A14, A16 Ground
A15 Sensor ground
Ambient sensor, engine coolant
B1, B11
temperature sensor
B2 Blower motor control
B3 Blower motor control
B4 RAM monitor
B5 RAM monitor
B6 A/C ON signal
B7
Mode door actuator power supply
B17
B8
Air mix door actuator power sup-
ply
B18
B10
Intake door actuator
B20
B13 Blower fan ON signal
B14 RAM monitor
B15, B16 Control panel
*1: Unable to measure the voltage for digital signal.
B: WIRING DIAGRAM
1. AIR CONDITIONER AUTO A/C MODEL
<Ref. to WI-59, WIRING DIAGRAM, Air Conditioning System.>
Auto A/C Control Module I/O Signal
Remarks
Ignition switch: OFF
Ignition switch: ACC
Mode door: FACE position
Mode door: DEF position
Air mix door: Maximum cool position
Air mix door: Maximum hot position
Ignition switch: ON
Ignition switch: ON, With sunload (No sunload: 0 V)
Ignition switch: ON
Ignition switch: ON
Ignition switch: ON
When operating pressure SW
Ignition switch: ON
Continuity to chassis ground
Continuity to chassis ground
Ignition switch : ON, Blower switch : ON
Ignition switch : ON, Blower switch : ON
A/C ON (A/C OFF: 0 V)
When switching mode door from DEF " FACE
When switching mode door from FACE " DEF
When switching air mix door from HOT " COOL
When switching air mix door from COOL " HOT
FRESH (RECIRC: Battery voltage)
RECIRC (FRESH: Battery voltage)
When blower fan is rotating (Not rotating: Battery volt-
age)
AC(diag)-9
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Measuring conditions
—
—
—
—
—
Standard value
Battery voltage
Battery voltage
4 V
1 V
4 V
1 V
Less than 5 V
3 V
5 V
Battery voltage
Battery voltage
0 V
Less than 5 V
0 #
0 #
*1
0.45 V
9.05 V
*1
*1
7 — 14 V
Battery voltage
Battery voltage
Battery voltage
Battery voltage
0 V
0 V
0 V
*1
*1