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Home >> Subaru >> 2008 >> Outback Base, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Auto A/C) (Diagnostics) >> Auto A/C Control Module I/O Signal >> Electrical Specification

Electrical Specification

Fig 1: Identifying Auto A/C Control Module Connector Terminal
G05669806Courtesy of SUBARU OF AMERICA, INC.
CONNECTOR TERMINAL REFERENCE

Terminal No. Remarks Measuring condition Standard
1 Battery power supply Ignition switch: OFF Battery voltage
3 Mode door actuator position signal Mode door: FACE position 4V
Mode door: DEF position 1 V
4 Air mix door actuator (passenger's side) position signal Air mix door: Maximum cool position 4 V
Air mix door: Maximum hot position 1 V
5 In-vehicle sensor Ignition switch: ON 25°C: 1 - 5 V
40°C: 1 - 5 V
6 Sunload sensor Ignition switch: ON, With Sunload (No sunload: 0 V) Sunlight: 3 V
Indoor light: 3 V
8 Each potentiometer and sunload sensor power supply Ignition switch: ON 5 V
9 CAN LO - (1)
10 CAN HI - (1)
11 Blower motor voltage feedback Ignition switch : ON, Blower switch : ON 0.45-10 V
12 Blower motor control signal Ignition switch : ON, Blower switch : ON 9.05 V
13 RAM monitor Tx Outputs the RAM value when the terminal No. 33 (RAMver) is connected to GND. (1)
14 RAM monitor Rx (1)
15 Magnet clutch ON demand signal output sensor GND Ignition switch: ON, Blower switch: ON, A/C switch: ON HI: 5.5 V
LO: 2.0 V
16 Mode servo drive signal When the actuator is operating
16 (+) - 36 (-): rotate to the FACE side
16 (-) - 36 (+): rotate to the DEF side
16 - 36 short: brake		 0 or 12 V
36
17 Air mix door actuator (passenger's side) drive signal When the actuator is operating
17 (+) - 37 (-): rotate to the COOL side
17 (-): 37 (+): rotate to the HOT side
17 - 37 short: brake		 0 or 12 V
37
18 Air mix door actuator (driver's side) When the actuator is operating
18 (+) - 38 (-): rotate to the COOL side
18 (-) - 38 (+): rotate to the HOT side
18 - 38 short: brake		 0 or 12 V
38
20 Intake door actuator drive signal When the intake door actuator is operating 0.7 V or less
40
21 Ignition power supply Ignition switch: ON Battery voltage
22 Pressure switch signal Ignition switch: ON Normal: ON
Abnormal: OFF
24 Air mix door actuator (driver's side) position signal Air mix door: Maximum cool position 4 V
Air mix door: Maximum hot position 1 V
25 After-evaporator sensor signal Changes by the temperature after the evaporator 1 - 4.5 V
26 VER switch signal (FOOT switch) When switching FOOT 0 V
27 Sensor ground Always 0 V
28 Control module GND Always 0 V
32 Heater main relay drive signal Ignition switch: ON Battery voltage
33 RAM monitor ON signal RAM monitor ON 0 V
34 Heater control panel communication - (1)
35 Heater control panel communication - (1)
(1) Unable to measure the voltage for digital signal.
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