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Home >> Honda >> 2021 >> CR-V EX-L, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (HVAC System - Testing & Troubleshooting (Hybrid)) >> Connector View >> Climate Control Unit Connector for Inputs and Outputs

Climate Control Unit Connector for Inputs and Outputs

WARNING: This page is about a different variant/trim than selected.
Connector Index
Climate Control Unit Connector A (32P)
Climate Control Unit Connector B (24P)

Climate Control Unit Connector A (32P) (female terminals) 

GHH379230Courtesy of HONDA, U.S.A., INC.
Cavity Terminal name Description Signal
1 Not used ---- ----
2 Not used ---- ----
3 EWP_PWM Electric heater coolant pump communication signal With vehicle in ON mode: pulses
4 Not used ---- ----
5 Not used ---- ----
6 Not used ---- ----
7 HUM_DATA Humidity/in-car temperature sensor communication signal With vehicle in ON mode: pulses
8 B-CAN_L B-CAN communication signal With vehicle in ON mode: pulses
9 Not used ---- ----
10 *1 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

11 TAM Detects outside air temperature sensor signal With vehicle in ON mode: about 1.0-4.0 V (depending on outside air temperature)
12 SENSOR_ COM Sensor ground With vehicle in ON mode: less than 0.2 V
13 Not used ---- ----
14 Not used ---- ----
15 Not used ---- ----
16 Not used ---- ----
17 Not used ---- ----
18 Not used ---- ----
19 Not used ---- ----
20 Not used ---- ----
21 Not used ---- ----
22 A/C_PTC2_RLY_CL- Signal for PTC heater B relay With vehicle in ON mode and PTC heater D relay ON: less than 0.2 V

With vehicle in ON mode and PTC heater B relay OFF: battery voltage

23 A/C_PTC4_RLY_CL- Signal for PTC heater D relay With vehicle in ON mode and PTC heater D relay ON: less than 0.2 V

With vehicle in ON mode and PTC heater D relay OFF: battery voltage

24 HUM_CLK Humidity/in-car temperature sensor communication signal With vehicle in ON mode: pulses

*1: With automatic wiper

Cavity Terminal name Description Signal
25 B-CAN_H B-CAN communication signal With vehicle in ON mode: pulses
26 S 5V Outputs sensor 5 V With vehicle in ON mode: about 5.0 V
27 Not used ---- ----
28 GND Ground for climate control unit (G403) With vehicle in ON mode: less than 0.2 V
29 BUS-DATA BUS-DATA communication signal ----
30 Not used ---- ----
31 Not used ---- ----
32 IG2_A/C IG2 power source With vehicle in ON mode: battery voltage

*1: With automatic wiper

Climate Control Unit Connector B (24P) (female terminals) 

GHH379231Courtesy of HONDA, U.S.A., INC.
Cavity Terminal name Description Signal
1 S5V Outputs sensor 5 V With vehicle in ON mode: about 5.0 V
2 AMD-P-DR Detects potentiometer signal of air mix control motor (door position) *1 With vehicle in ON mode: about 0.5-4.5 V (depending on air mix control motor position) *1
Detects potentiometer signal of driver's air mix control motor (door position) *2 With vehicle in ON mode: about 0.5-4.5 V (depending on driver's air mix control motor position) *2
3 *2 AMD-P-AS Detects potentiometer signal of passenger's air mix control motor (door position) With vehicle in ON mode: about 0.5-4.5 V (depending on passenger's air mix control motor position)
4 RFD-P Detects potentiometer signal of recirculation control motor (door position) With vehicle in ON mode: about 1.0-4.0 V (depending on recirculation control motor position
5 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)
6 Not used ---- ----
7 Not used ---- ----
8 TEVA Detects evaporator temperature sensor signal With vehicle in ON mode: about 1.0-4.0 V (depending on evaporator temperature)
9 Not used ---- ----
10 SENS-COM Sensor ground With vehicle in ON mode: less than 0.2 V
11 BLW-G Outputs power transistor gate voltage With vehicle in ON mode and fan control dial *4, fan control icon *3, or fan control button *3 OFF: less than 0.2 V

With vehicle in ON mode and fan control dial *4, fan control icon *3, or fan control button *3 ON: about 4.0 V-battery voltage (depending on blower motor control)

*1: Without dual zone climate control

*2: With dual zone climate control

*3: Climate control panel without display

*4: Climate control panel with display

Cavity Terminal name Description Signal
12 BLW-V Feedback signal of power transistor drain voltage With vehicle in ON mode: about 0 V-battery voltage (depending on blower motor speed)
13 M-HOT-DR Outputs to drive air mix control motor to HOT side *1 With vehicle in ON mode and air mix control motor moving to HOT: battery voltage *1
Outputs to drive driver's air mix control motor to HOT side *2 With vehicle in ON mode and driver's air mix control motor moving to HOT: battery voltage *2
14 M-COOL-DR Outputs to drive air mix control motor to COOL side *1 With vehicle in ON mode and air mix control motor moving to COOL: battery voltage *1
Outputs to drive driver's air mix control motor to COOL side *2 With vehicle in ON mode and driver's air mix control motor moving to COOL: battery voltage *2
15 *2 M-HOT-AS Outputs to drive passenger's air mix control motor to HOT side With vehicle in ON mode and passenger's air mix control motor moving to HOT: battery voltage
16 *2 M-COOL-AS Outputs to drive passenger's air mix control motor to COOL side With vehicle in ON mode and passenger's air mix control motor moving to COOL: battery voltage
17 M-REC Outputs to drive recirculation control motor to RECIRCULATE side With vehicle in ON mode and recirculation control motor moving to RECIRCULATE: battery voltage
18 M-FRS Outputs to drive recirculation control motor to FRESH side With vehicle in ON mode and recirculation control motor moving to FRESH: battery voltage
19 M-VENT Outputs to drive mode control motor to VENT side With vehicle in ON mode and mode control motor moving to VENT: battery voltage
20 M-DEF Outputs to drive mode control motor to DEF side With vehicle in ON mode and mode control motor moving to DEF: battery voltage
21 Not used ---- ----
22 Not used ---- ----
23 Not used ---- ----
24 Not used ---- ----

*1: Without dual zone climate control

*2: With dual zone climate control

*3: Climate control panel without display

*4: Climate control panel with display