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Climate Control Unit Inputs and Outputs

Fig 1: Identifying Climate Control Unit Connector A (32P)
G08076192Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR A

Cavity Wire color Terminal name Description Signal
1 BLK GND Climate control unit ground (G403) Less than 0.2 V at all times
3 RED DISP CLK Communication signal from HVAC display With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
4 PUR DISP SO Communication signal to HVAC display With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
5 BLU Ps M-DEF Drives passenger's mode control motor to DEF With ignition switch ON (II), or vehicle in ON mode, and motor moving to HEAT: battery voltage
6 GRY Ps M-VENT Drives passenger's mode control motor to VENT With ignition switch ON (II), or vehicle in ON mode, and motor moving to VENT: battery voltage
7 YEL Dr M-DEF Drives driver's mode control motor to DEF With ignition switch ON (II), or vehicle in ON mode, and motor moving to DEF: battery voltage
8 WHT Dr M-VENT Drives driver's mode control motor to VENT With ignition switch ON (II), or vehicle in ON mode, and motor moving to VENT: battery voltage
9 LT BLU Ps M-COOL Drives passenger's air mix control motor to COOL With ignition switch ON (II), or vehicle in ON mode, and motor moving to COOL: battery voltage
10 GRN Ps M-HOT Drives passenger's air mix control motor to HOT With ignition switch ON (II), or vehicle in ON mode, and motor moving to HOT: battery voltage
11 ORN Dr M-COOL Drives driver's air mix control motor to COOL With ignition switch ON (II), or vehicle in ON mode, and motor moving to COOL: battery voltage
12 PNK Dr M-HOT Drives driver's air mix control motor to HOT With ignition switch ON (II), or vehicle in ON mode, and motor moving to HOT: battery voltage
15 LT GRN IG2 IG2 power supply With ignition switch ON (II), or vehicle in ON mode: battery voltage
17 GRN Ps MODE 1 Passenger's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
18 WHT Ps MODE 2 Passenger's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
19 LT BLU Ps MODE 3 Passenger's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
20 ORN Ps MODE 4 Passenger's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
21 LT GRN Dr MODE 1 Driver's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
22 BRN Dr MODE 2 Driver's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
23 PNK Dr MODE 3 Driver's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
24 BLK Dr MODE 4 Driver's mode control motor position feedback With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
25 PUR Dr AMD-P Driver's air mix control motor position feedback (door position) With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on motor position)
26 BLU Ps AMD-P Passenger's air mix control motor position feedback (door position) With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on motor position)
27 RED BLW-V Feedback of power transistor drain voltage With ignition switch ON (II), or vehicle in ON mode, and fan switch OFF: about 8 V. Voltage decreases as fan speed increases
28 YEL BLW-G Outputs power transistor gate voltage With ignition switch ON (II), or vehicle in ON mode, and fan switch at MIN: about 2 V. Voltage increases to about 10 V with fan switch at MAX
30 GRY ILL + Power source for illumination With combination light switch ON: battery voltage
Fig 2: Identifying Climate Control Unit Connector B (24P)
G08076193Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR B

Cavity Wire color Terminal name Description Signal
1 PNK RR DEF LED Switches rear window defogger/mirror defogger button LED ON/OFF --
2 GRN FR DEF LED Switches windshield defroster button LED ON/OFF --
5 RED AS AUTO SW Inputs AUTO button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
6 WHT AS T UP SW Inputs passenger's temperature UP button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
7 BRN AS T DN SW Inputs passenger's temperature DOWN button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
8 BLK AS MODE SW Inputs passenger's MODE button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
9 GRY RR DEF SW Inputs rear window defogger/mirror defogger button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
10 BLU AC SW Inputs A/C button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
11 LT GRN RECIRC Inputs recirculation button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
12 LT BLU FR DEF SW Inputs windshield defroster button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
13 PUR RECIRC LED Switches recirculation button LED ON/OFF --
14 GRY SYNC LED Switches SYNC button LED ON/OFF --
17 BLU DR AUTO SW Inputs AUTO button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
18 ORN DR T UP SW Inputs driver's temperature UP button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
19 LT GRN DR T DN SW Inputs driver's temperature DOWN button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
20 LT BLU DR MODE SW Inputs driver's MODE button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
21 WHT SYNC SW Inputs SYNC button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
22 BRN FAN UP SW Inputs FAN UP button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
23 YEL FAN DN SW Inputs FAN DOWN button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
24 GRN AC ON/OFF Inputs ON/OFF button signal With ignition switch ON (II), or vehicle in ON mode: about 5 V
Fig 3: Identifying Climate Control Unit Connector C (20P)
G08076194Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR C

Cavity Wire color Terminal name Description Signal
1 RED SENS COM Ground for sensors Less than 0.2 V at all times
2 BRN S5V Power source for sensors With ignition switch ON (II), or vehicle in ON mode: about 5 V
4(1) ORN NAVI SI Communication signal to audio-navigation unit With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
5(1) GRN NAVI SO Communication signal from audio-navigation unit With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
6(1) YEL NAVI CLK Communication signal from audio-navigation unit With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
7 BLU B-CAN L B-CAN communication line With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
8 PNK B-CAN H B-CAN communication line With ignition switch ON (II), or vehicle in ON mode: pulses (about 2.5 V)
9 PUR M-FRS Drives recirculation control motor to FRESH With ignition switch ON (II), or vehicle in ON mode, and motor moving to FRESH: battery voltage
10 GRY M-REC Drives recirculation control motor to RECIRCULATE With ignition switch ON (II), or vehicle in ON mode, and motor moving to RECIRCULATE: battery voltage
11 WHT PD A/C pressure sensor signal With engine running and A/C compressor clutch engaged: about 1.4-4.8 V (depending on A/C pressure)
12 GRY HUMID Inputs humidity sensor signal With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on humidity)
14 PUR TSUN Inputs sunlight sensor signal With ignition switch ON (II), or vehicle in ON mode, and no sunlight or the sensor covered up: 3.56 V
With ignition switch ON (II), or vehicle in ON mode, and sunlight on the sensor: less than 3.56 V (depending on sunlight intensity)
15 LT BLU TR Inputs in-car sensor signal With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on in-car temperature)
16 BRN TEVA Inputs evaporator temperature sensor signal With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on evaporator temperature). About 2.5 V at 72°F (22°C)
17 ORN TAM Inputs outside air temperature sensor signal With ignition switch ON (II), or vehicle in ON mode: between 1.0 V and 4.0 V (depending on ambient temperature)
18 LT GRN L MODE 1 Recirculation control motor position feedback 1 signal With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
19 GRN L MODE 2 Recirculation control motor position feedback 2 signal With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
20 BLK L MODE 3 Recirculation control motor position feedback 3 signal With ignition switch ON (II), or vehicle in ON mode: about 0 V or about 5 V (depending on motor position)
(1) With navigation
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