| Components |

| Connector Pin Function |
|
Connector |
Pin NO |
Function |
Connector |
Pin NO |
Function |
|
A |
1 |
LOW |
B |
18 |
ILL-(RHEO) |
|
2 |
COMMON |
19 |
Sensor Ground |
||
|
3 |
Ground |
20 |
Ground |
||
|
4 |
MIDDLE LOW |
21 |
Battery (+) |
||
|
5 |
MIDDLE HIGH |
22 |
IGN2 |
||
|
6 |
HIGH |
23 |
ILL+(TAIL) |
||
|
B |
1 |
ISG Power(+) |
24 |
Sensor REF (+5V) |
|
|
2 |
IGN1 |
25 |
- |
||
|
3 |
- |
26 |
- |
||
|
4 |
Mode Control Actuator (VENT) |
27 |
Max Blwoer On Signal |
||
|
5 |
Mode Control Actuator (DEF) |
28 |
Rear Defogging Switch |
||
|
6 |
Temperature Control Actuator (COOL) |
29 |
- |
||
|
7 |
Temperature Control Actuator (WARM) |
30 |
- |
||
|
8 |
Intake Actuator (FRE) |
31 |
HTD |
||
|
9 |
Intake Actuator (REC) |
32 |
DETENT OUT(-) |
||
|
10 |
Evaporator Temperature Sensor (+) |
33 |
PTC Relay 2 (Diesel Only) |
||
|
11 |
Ambient Temperature Sensor (+) |
34 |
PTC Relay 3 (Diesel Only) |
||
|
12 |
Mode Control Actuator F/B |
35 |
PTC ON Signal (Diesel Only) |
||
|
13 |
Temperature Control Actuator F/B |
36 |
Blower ON Signal |
||
|
14 |
Intake Actuator F/B |
37 |
- |
||
|
15 |
C CAN HIGH |
38 |
ECV (+) |
||
|
16 |
C CAN LOW |
39 |
ECV (-) Ground |
||
|
17 |
- |
40 |
Ground |
Controller
Heater & A/C Control Unit (Manual) Repair procedures