LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2024 >> WRX Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Diagnostics) >> Control Module I/O Signal >> Electrical Specification

Electrical Specification

G14614833Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Contents Measuring condition Standard
(i107) No. 1 Mode door actuator #4 Digital signal; cannot be measured -
(i107) No. 2 Mode door actuator #3 Digital signal; cannot be measured -
(i107) No. 3 Mode door actuator #2 Digital signal; cannot be measured -
(i107) No. 4 Mode door actuator #1 Digital signal; cannot be measured -
(i107) No. 5 - - -
(i107) No. 6 (+) ←→ (i107) No. 8 (-) Intake door actuator drive output (FRESH) While operating to FRESH side 8 V or more
(i107) No. 7 - - -
(i107) No. 8 (+) ←→ (i107) No. 6 (-) Intake door actuator drive output (RECIRC) While operating to RECIRC side 8 V or more
(i107) No. 9 ←→ Chassis ground (-) Blower motor relay drive output Blower switch: ON 1 V or less
(i107) No. 10 ←→ Chassis ground (-) Sensor and actuator power supply Ignition switch: ON 5 V
(i107) No. 11 - - -
(i107) No. 12 ←→ Chassis ground (-) Intake door actuator position signal Ignition switch: ON 0 - 5 V
(i107) No. 13 (+) ←→ Chassis ground (-) Pressure sensor (PD) signal Compressor operation status 0.1 - 4.9 V
(i107) No. 14 (+) ←→ Chassis ground (-) Sensor GND Always 1 V or less
(i107) No. 15 (+) ←→ Chassis ground (-) ACC power supply Ignition switch: ACC Battery voltage
(i107) No. 16 (+) ←→ Chassis ground (-) Sunload sensor signal Sunlight is contacting sensor 1 - 4 V
(i107) No. 17 (+) ←→ Chassis ground (-) In-vehicle sensor signal Ignition switch: ON 25°C: Approx. 2.5 V
(i107) No. 18 (+) ←→ Chassis ground (-) Evaporator sensor signal Depends on temperature after the evaporator. 1 - 4.5 V
(i107) No. 19 Body CAN L Digital signal; cannot be measured -
(i107) No. 20 Body CAN H Digital signal; cannot be measured -
(i107) No. 21 Air mix door actuator LH #4 Digital signal; cannot be measured -
(i107) No. 22 Air mix door actuator LH #3 Digital signal; cannot be measured -
(i107) No. 23 Air mix door actuator LH #2 Digital signal; cannot be measured -
(i107) No. 24 Air mix door actuator LH #1 Digital signal; cannot be measured -
(i107) No. 25 Air mix door actuator RH #4 Digital signal; cannot be measured -
(i107) No. 26 Air mix door actuator RH #3 Digital signal; cannot be measured -
(i107) No. 27 Air mix door actuator RH #2 Digital signal; cannot be measured -
(i107) No. 28 Air mix door actuator RH #1 Digital signal; cannot be measured -
(i107) No. 29 - - -
(i107) No. 30 - - -
(i107) No. 31 (+) ←→ Chassis ground (-) Battery power supply Always Battery voltage
(i107) No. 32 (+) ←→ Chassis ground (-) Ignition power supply Ignition switch: ON Battery voltage
(i107) No. 33 (+) ←→ Chassis ground (-) Humidity sensor signal(1) Ignition switch: ON Fluctuates depending on humidity of the vehicle interior. 1 - 4.5 V
(i107) No. 34 (+) ←→ Chassis ground (-) GND Always 1 V or less
(i107) No. 35 - - -
(i107) No. 36 (+) ←→ Chassis ground (-) Variable compressor solenoid valve drive output Ignition switch: ON
Blower switch: ON
A/C switch: ON
2 - 12 V
(i107) No. 37 - - -
(i107) No. 38 (+) ←→ Chassis ground (-) Pressure sensor (PH) signal Compressor operation status 0.1 - 4.9 V
(i107) No. 39 - - -
(i107) No. 40 (+) ←→ Chassis ground (-) Blower motor control output Blower switch: ON
Outlet opening: VENT
1st gear: Approx. 10.0 V
2nd gear: Approx. 9.0 V
3rd gear: Approx. 8.0 V
4th gear: Approx. 7.0 V
5th gear: Approx. 5.5 V
6th gear: Approx. 4.0 V
7th gear: Approx. 3.0 V
(i108) No. 1 (+) ←→ Chassis ground (-) Seat heater (Dr) drive output(2) Ignition switch: ON
Seat heater switch: ON
Battery voltage
(i108) No. 2 (+) ←→ Chassis ground (-) Seat heater (Pa) GND(2) Always 1 V or less
(i108) No. 3 (+) ←→ Chassis ground (-) Seat heater (Dr) GND(2) Always 1 V or less
(i108) No. 4 (+) ←→ Chassis ground (-) Seat heater (Dr) temperature sensor signal(2) Ignition switch: ON
Varies depending on temperature at seat heater.
0 - 5 V
(i108) No. 5 (+) ←→ Chassis ground (-) Seat heater (Pa) temperature sensor signal(2) Ignition switch: ON
Varies depending on temperature at seat heater.
0 - 5 V
(i108) No. 6 (+) ←→ Chassis ground (-) Seat heater (Pa) drive output(2) Ignition switch: ON
Seat heater switch: ON
Battery voltage
(1) With humidity sensor

(2) With seat heater