Heating, Ventilation, and Air Conditioning

Components and Component Locations of the Heater and Air Conditioning Control Unit (FATC)

~2min read

Components

Connector Terminal Function
Pin No. Connector A Connector B Connector C
1 ILL (+) Ground Electric Compressor Lock (+)
2 REF Sensor (+5V) Sensor Ground Electric Compressor Lock (-)
3 C_CAN High Blower PWM Input High Voltage PTC Heater Lock (+)
4 C_CAN LOW Ionizer Diagnosis High Voltage PTC Heater Lock (-)
5 Driver Mode Actuator (VENT) - PAB IGN3
6 Driver Mode Actuator (DEF) CLEAN Signal PAB Enable Signal
7 Driver Mode Actuator F/B Passenger Mode Actuator (VENT) PAB Off Signal
8 Intake Actuator (FRE) Passenger Mode Actuator (DEF) SBR
9 Intake Actuator (REC) Passenger Mode Actuator F/B Rr LEFT SBR
10 Intake Actuator F/B Defrost Actuator (OPEN) Rr CENTER SBR
11 K-Line Defrost Actuator (CLOSED) R R RIGHT SBR
12 HTD Defrost Actuator F/B -
13 Rear Heater Switch Left Duct Sensor (+) -
14 Temp. Control Actuator (COOL) Floor Left Duct Sensor (+) -
15 Temp. Control Actuator (WARM) IGN3 -
16 Temp. Control Actuator F/B IGN2 -
17 Driver Seat Heater Indicator - LOW - ?
18 Driver Seat Heater Indicator - MID 2-WAY Valve No.1 (+)
19 Driver Seat Heater Indicator - HIGH 3-WAY Valve No.1 (+)
20 ILL - (REO) 3-WAY Valve No.2 (+)
21 HOLD (+) 2-WAY Valve No.2 (+)
22 Driver Seat Heater Switch CLIMATE_MAIN HIGH
23 Driver Ventilation Indicator - LOW CLIMATE_CAN LOW
24 Driver Ventilation Indicator - MID HUMIDITY (PWM)
25 Driver Ventilation Indicator - HIGH Air Pressure Sensor Signal
26 Passenger Seat Heater Switch Refrigerant Temperature Sensor No.1 Signal
27 Ambient Sensor (+) Refrigerant Temperature Sensor No.2 Signal
28 Evaporator Sensor (+) Coolant Valve OUTPUT
29 Passenger Ventilation Indicator - LOW IGN3
30 Passenger Ventilation Indicator - MID IS Blower
31 Passenger Ventilation Indicator - HIGH Battery
32 Photo Sensor (-) Battery
33 Passenger Ventilation Switch ? ?
34 Left Ventilation Switch
35 INH Fan
36 MM_CAN HIGH
37 MM_CAN LOW
38 Passenger Seat Heater Indicator - LOW
39 Passenger Seat Heater Indicator - MID
40 Passenger Seat Heater Indicator - HIGH

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