Fig. 102: Checking For Continuity Between Test Points 1 And 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The GND wire is OK. REPLACE THE HVAC CONTROL UNIT .
NO : Check for an open in the wire between the HVAC control unit and body ground. If the wire is OK,
check for poor ground at G502.
HVAC CONTROL UNIT CONNECTOR FOR INPUTS AND OUTPUTS
HVAC CONTROL UNIT INPUTS AND OUTPUTS
Fig. 103: HVAC Control Unit 32P Connector Terminals Layout
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Wire
color
Cavity
Terminal name
Description
Signal
With ignition switch ON (II), and rear
window defogger switch ON: about 0
V
With ignition switch ON (II), and rear
window defogger switch OFF: battery
Signal for rear window
defogger relay
1
RED RR_DEF_RLY_CL-
voltage
---
Not
used
2
3
Not used
---
With ignition switch ON (II), and
ECON OFF mode: battery voltage
With ignition switch ON (II), and
ECON ON mode: less than 0.5 V
YEL
ECON_OUT
Inputs E-CON control signal
Not
used
4
5
6
7
8
Not used
GND
---
---
Ground for HVAC control
unit (G502)
BRN
Less than 0.2 V at all times
Not
used
Not used
A/C_CUT
Not used
---
---
---
---
Outputs A/C off prohibition
signal
BLU
Not
used
---
With ignition switch ON (II), and fan
control dial OFF: less than 0.2 V
Outputs power transistor gate With ignition switch ON (II), and fan
9
GRN
BLOWER_G
voltage
control dial ON: about 4.0 V-battery
voltage (depending on blower motor
control)
With ignition switch ON (II): about 0
V-battery voltage (depending on
blower motor speed)
Feedback signal of power
transistor drain voltage
10
RED
BLOWER_V
Not
used
11
12
13
Not used
IG2_A/C
Not used
---
---
With ignition switch ON (II): battery
voltage
PNK
IG2 power source
---
Not
used
---
With illumination switch ON: changed
voltage (depending on dashlights
brightness controller)
Detects illumination control
signal
14 GRN
ILL- (LED)
Not
15
Not used
ILLUMI+
SENSOR_5V
Not used
---
---
used
Power source for
illumination
With combination light switch ON:
battery voltage
With ignition switch ON (II): about
5.0 V
16 GRY
LT
17
Outputs sensor 5 V
---
BLU
Not
used
18
---
With ignition switch ON (II): about
1.0 - 4.0 V (depending on evaporator
19 ORN
TEVA
Detects evaporator
temperature sensor signal
20 GRY SENSOR_COM Sensor ground
temperature)
Less than 0.2 V at all times
With ignition switch ON (II): about
0.5-4.5 V (depending on recirculation
control motor position)
With ignition switch ON (II): about
0.5-4.0 V (depending on air mix
control motor position)
Detects potentiometer signal
of recirculation control motor
21
22
PNK
RFD-P
LT
GRN
Detects potentiometer signal
of air mix control motor
AMD_P_DR
With ignition switch ON (II): about
0.5-4.5 V (depending on mode control
motor position)
Detects potentiometer signal
of mode control motor
23 WHT
MODE-P
Not used
Not
24
---
---
used
With ignition switch ON (II), normal
A/C pressure, and A/C switch ON: less
than 0.5 V
With ignition switch ON (II), normal
A/C pressure, and A/C switch OFF:
battery voltage
LT
25
ACS
Outputs A/C on/off signal
GRN
Not
26
Not used
---
---
used
With ignition switch ON (II), air mix
control motor moving to HOT: battery
voltage
LT
27
Output to drive air mix
control motor to HOT side
M-HOT_DR
BLU
With ignition switch ON (II), air mix
control motor moving to COOL:
battery voltage
With ignition switch ON (II), and
mode control motor moving to VENT:
battery voltage
With ignition switch ON (II), and
mode control motor moving to DEF:
battery voltage
Output to drive air mix
control motor to COOL side
28 GRN
M-COOL_DR
M-VENT
Outputs to drive mode
control motor to VENT side
29
30
31
32
PUR
YEL
Output to drive mode control
motor to DEF side
M-DEF
Output to drive recirculation With ignition switch ON (II), and
BLK F/R_MTR (REC) control motor to
RECIRCULATE side
recirculation control motor moving to
RECIRCU: battery voltage
With ignition switch ON (II), and
recirculation control motor moving to
FRESH: battery voltage
Output to drive recirculation
control motor to FRESH side
BLU F/R_MTR (FRESH)
MODE CONTROL MOTOR TEST
SPECIAL TOOL DESCRIPTION
Image
Description/Tool Number
2024 Honda CR-V Owner's Manual
2023 Honda CR-V Owner's Manual
2021 Honda CR-V Owner's Manual
2018 Honda CR-V Owner's Manual
2015 Honda CR-V Owner's Manual
