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Climate Control Unit Connector for Inputs and Outputs (2013-15)

GHH74877Courtesy of HONDA, U.S.A., INC.

CONNECTOR A 

Cavity Wire color Terminal name Description Signal
1 YEL AMD-P Detects potentiometer signal of driver's air mix control motor (door position) With vehicle in ON mode: about 1.0-4.0 V (depending on driver's air mix control motor position)
2 LT BLU AMD-P AS Detects potentiometer signal of passenger's air mix control motor (door position) With vehicle in ON mode: about 1.0-4.0 V (depending on passenger's air mix control motor position)
3 GRN RFD-P Detects potentiometer signal of recirculation control motor (door position) With vehicle in ON mode: about 0.5-4.5 V (depending on recirculation control motor position)
4 PNK MDD-P Detects potentiometer signal of mode control motor (door position) With vehicle in ON mode: about 0.5-4.5 V (depending on mode control motor position)
5 Not used Not used - - - - - - - -
6 BRN IG2 A/C IG2 power source With vehicle in ON mode: battery voltage
7 GRN MODE MTR DEF Outputs to drive mode control motor to DEF side With vehicle in ON mode, and mode control motor moving to DEF: battery voltage
8 WHT MODE MTR VENT Outputs to drive mode control motor to VENT side With vehicle in ON mode, and mode control motor moving to VENT: battery voltage
9 PNK M-HOT Outputs to drive driver's air mix control motor to HOT side With vehicle in ON mode, driver's air mix control motor moving to HOT: battery voltage
10 LT BLU M-COOL Outputs to drive driver's air mix control motor to COOL side With vehicle in ON mode, driver's air mix control motor moving to COOL: battery voltage
11 YEL F/R MTR(REC) Outputs to drive recirculation control motor to RECIRCULATE side With vehicle in ON mode, and recirculation control motor moving to RECIRCU: battery voltage
12 BLU F/R MTR(FRESH) Outputs to drive recirculation control motor to FRESH side With vehicle in ON mode, and recirculation control motor moving to FRESH: battery voltage
13 ORN M-HOT AS Outputs to drive passenger's air mix control motor to HOT side With vehicle in ON mode, passenger's air mix control motor moving to HOT: battery voltage
Cavity Wire color Terminal name Description Signal
14 LT GRN M-COOL AS Outputs to drive passenger's air mix control motor to COOL side With vehicle in ON mode, passenger's air mix control motor moving to COOL: battery voltage
15 PNK B CAN-H B CAN-H communication signal With vehicle in ON mode: pulses
16 Not used Not used - - - - - - - -
17 BLU B CAN-L B CAN-L communication signal With vehicle in ON mode: pulses
18 Not used Not used - - - - - - - -
19 BLK GND Ground for climate control unit (G503) With vehicle in ON mode: less than 0.2 V
20 RED TEVA Detects evaporator temperature sensor signal With vehicle in ON mode: about 1.0-4.0 V (depending on evaporator temperature)
21 GRY TAM Detects outside air temperature sensor signal With vehicle in ON mode: about 1.0-4.0 V (depending on outside air temperature)
22 PUR TSUN Detects sunlight sensor signal With vehicle in ON mode, and no sunlight or the sensor covered up: 3.56 V

With vehicle in ON mode, and sunlight on the sensor: less than 3.56 V

23 Not used Not used - - - - - - - -
24 LT GRN TR Detects in-car temperature sensor signal With vehicle in ON mode: about 1.0-4.0 V (depending on in-car temperature)
25 BLU ACS Outputs A/C on/off signal With vehicle in ON mode, normal A/C pressure, and A/C switch ON: less than 0.2 V

With vehicle in ON mode, normal A/C pressure, and A/C switch OFF: battery voltage

26 Not used Not used - - - - - - - -
27 RED A/C SO Outputs display data to HVAC display unit*1 or audio-navigation switch panel*2 With vehicle in ON mode: pulses
28 WHT A/C CLK Inputs clock signal from HVAC display unit*1 or audio-navigation switch panel*2 With vehicle in ON mode: pulses
*1: Without navigation*2: With navigation

Climate Control Unit Connector for Inputs and Outputs 

GHH74878Courtesy of HONDA, U.S.A., INC.

CONNECTOR B 

Cavity Wire color Terminal name Description Signal
1 BLK S 5V Outputs sensor 5 V With vehicle in ON mode: about 5.0 V
2 Not used Not used - - - - - - - -
3 Not used Not used - - - - - - - -
4 PNK BLOWER G Outputs power transistor gate voltage With vehicle in ON mode, and fan control switch OFF: less than 0.2 V

With vehicle in ON mode, and fan control switch ON: about 4.0 V battery voltage (depending on blower motor control)

5 BLU BLOWER V Feedback signal of power transistor drain voltage With vehicle in ON mode: about 0 V battery voltage (depending on blower motor speed)
6 GRY ILLUMI+ Power source for illumination With combination light switch ON: battery voltage
7 Not used Not used - - - - - - - -
8 Not used Not used - - - - - - - -
9 LT GRN RR DEF RLY CL- Signal for rear window defogger relay With vehicle in ON mode, and rear window defogger button ON: about 0 V

With vehicle in ON mode, and rear window defogger button OFF: battery voltage

10 BLK SENSER COM Sensor ground With vehicle in ON mode: less than 0.2 V
11 Not used Not used - - - - - - - -
12 YEL ILL-(LED) Detects illumination control signal With combination light switch ON: changed voltage (depending on dashlights brightness controller)