HVAC Control Unit Connector for Inputs and Outputs
HVAC Control Unit Connector for Inputs and Outputs

Cavity
Wire color
Terminal name
Description
Signal
1
GRY
ILLUMI+
Power source for illumination
With combination light switch ON: battery voltage
2
Not used
Not used
???
???
3
TAN
ILL-(LED)
Detects illumination control signal
With combination light switch ON: changed voltage (depending on dashlights brightness controller)
4
Not used
Not used
???
???
5
PNK
M-HOT DR
Output to drive air mix control motor to HOT side
With ignition switch ON (II) and air mix control motor moving to HOT: battery voltage
6
LT BLU
M-COOL DR
Output to drive air mix control motor to COOL side
With ignition switch ON (II) and air mix control motor moving to COOL: battery voltage
7
GRN
MODE MTR DEF
Outputs to drive mode control motor to DEF side
With ignition switch ON (II) and mode control motor moving to DEF: battery voltage
8
WHT
MODE MTR VENT
Outputs to drive mode control motor to VENT side
With ignition switch ON (II) and mode control motor moving to VENT: battery voltage
9
PUR
F/R MTR(FRESH)
Output to drive recirculation control motor to FRESH side
With ignition switch ON (II) and recirculation control motor moving to FRESH: battery voltage
10
ORN
F/R MTR(REC)
Output to drive recirculation control motor to RECIRCULATE side
With ignition switch ON (II) and recirculation control motor moving to RECIRCULATE: battery voltage
11
Not used
Not used
???
???
12
WHT
RFD-P
Detects potentiometer signal of recirculation control motor (door position)
With ignition switch ON (II): about 0.5?4.5 V (depending on recirculation control motor position)
13
GRY
AMD-P DR
Detects potentiometer signal of air mix control motor (door position)
With ignition switch ON (II): about 1.0?4.0 V (depending on air mix control motor position)
14
GRN
MDD-P
Detects potentiometer signal of mode control motor (door position)
With ignition switch ON (II): about 0.5?4.5 V (depending on mode control motor position)
15
Not used
Not used
???
???
16
BLK
S 5V
Outputs sensor 5 V
With ignition switch ON (II): about 5.0 V
17
LT GRN
IG2 A/C
IG2 power source
With ignition switch ON (II): battery voltage
18
Not used
Not used
???
???
19
BRN
GND
Ground for HVAC control unit (G506)
With ignition switch ON (II): less than 0.2 V
20
BLU
SENSOR COM
Sensor ground
With ignition switch ON (II): less than 0.2 V
21
Not used
Not used
???
???
22
YEL
BLOWER G
Outputs power transistor gate voltage
With ignition switch ON (II) and fan control dial OFF: less than 0.2 V

With ignition switch ON (II) and fan control dial ON: about 4.0 V?battery voltage (depending on blower motor control)
23
Not used
Not used
???
???
24
BLU
BLOWER V
Feedback signal of power transistor drain voltage
With ignition switch ON (II): about 0 V?battery voltage (depending on blower motor speed)
25
Not used
Not used
???
???
26
BRN
RR DEF SW
Signal for rear window defogger relay
With ignition switch ON (II) and rear window defogger button ON: about 0 V

With ignition switch ON (II) and rear window defogger button OFF: battery voltage
27
RED
ACS
Outputs A/C on/off signal
With ignition switch ON (II), normal A/C pressure, and A/C button ON: less than 0.2 V

With ignition switch ON (II), normal A/C pressure, and A/C button OFF: battery voltage
28
LT GRN
A/C OUT
Outputs A/C off permit signal
With ignition switch ON (II) and when HAC CUT control is permitted: less than 0.2V

With ignition switch ON (II) and when HAC CUT control is prohibited: battery voltage
29
PUR
BLOWER REQ
Outputs increase request of the charging voltage
With ignition switch ON (II) and fan control dial in MAX: less than 0.2 V

With ignition switch ON (II) and fan control dial in other than MAX: battery voltage
30
PNK
ECON OUT
Inputs ECON mode control signal
With ignition switch ON (II) and ECON ON mode: less than 1.0 V

With ignition switch ON (II) and ECON OFF mode: battery voltage
31
Not used
Not used
???
???
32
RED
TEVA
Detects evaporator temperature sensor signal
With ignition switch ON (II): about 1.0?4.0 V (depending on evaporator temperature)