Subaru 2009 IMPREZA Service Manual page 2736

4. Auto A/C Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
Terminal No.
1 Mode actuator # 4
2 Mode actuator # 3
3 Mode actuator # 2
4 Mode actuator # 1
6 Intake door actuator (FRESH)
7 Intake door actuator (MIX)
8 Intake door actuator (RECIRC)
9 Blower fan ON signal
11 A/C cut-off signal
14 GND for sensors
15 ACC power supply
16 Sunload sensor
17 RECIRC sensor
18 Post evaporator sensor
19 CAN Lo
20 CAN Hi
25 Air mix actuator #4
26 Air mix actuator #3
27 Air mix actuator #2
28 Air mix actuator #1
31 BATT
32 IGN
34 Ground
36 A/C ON signal
35 ILL–
37 ILL+
39 Rr defogger switch output
40 Fan control signal
Auto A/C Control Module I/O Signal
20 19 18 17 16 15 14 13
40 39 38 37 36 35 34 33
Content
Actuator operating
Actuator operating
Actuator operating
Actuator operating
FRESH mode
MIX mode
RECIRC mode
Blower fan is ON
A/C is cut off
Always
ACC ON
Sunlight is contacting sensor
Ignition switch ON
Depends on temperature after the evaporator.
Unable to measure the voltage for digital signal.
Unable to measure the voltage for digital signal.
Air mix actuator is operating
Air mix actuator is operating
Air mix actuator is operating
Air mix actuator is operating
Always
Ignition ON
Always
A/C is operating
Illumination ON (Measure between 37 — 35)
When the rear defogger switch is ON
Ignition switch : ON, Blower switch : ON
AC(diag)-7
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
i88
12 11 10 9 8 7 6 5 4 3
32 31 30 29 28 27 26 25 24 23
Measuring condition
2 1
22 21
Specification
8 V or more
8 V or more
8 V or more
8 V or more
1 V or less
1 V or less
1 V or less
1 V or less
1 V or less
1 V or less
Battery voltage
1 — 4 V
25°C: 2.5 V
1 — 4.5 V
8 V or more
8 V or more
8 V or more
8 V or more
Battery voltage
Battery voltage
1 V or less
8 V or more
Battery voltage
1 V or less
8 V or more
AC-01692
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