Heating, Ventilation, and Air Conditioning

Heater and A/C Control Unit (MANUAL) Components and Component Locations

~1min read

Components

Connector Terminal Function
Connector Pin No. Gasoline Diesel
Function Function
A 1 Low Low
2 General General
3 High High
4 Medium Low Medium Low
5 Medium High Medium High
6 Ground Ground
B 1 Battery Battery
2 Ignition 2 Ignition 2
3 Ignition 1 Ignition 1
4 HTD (Rear Defrost Indicator) HTD
5 Lock Outside (+) Lock Outside (+)
6 Evaporator Temperature Sensor (+) Evaporator Temperature Sensor (+)
7 Ambient Temperature Sensor (+) Ambient Temperature Sensor (+)
8 Mode Actuator Feedback Mode Actuator Feedback
9 Temperature Sensor Feedback Temperature Sensor Feedback
10 Intake Actuator Feedback Intake Actuator Feedback
11 Rear Defogger Switch Rear Defogger Switch
12 - PTC ON Signal
13 PTC Relay PTC Relay 2
14 _ PTC Relay 3
15 Sensor Ground Sensor Ground
16 Ground Ground
17 Rear Light (+) Rear Light (+)
18 REF Sensor (+5V) REF Sensor (+5)
19 ECV + ECV +
20 ECV - (Ground) ECV - (Ground)
21 Mode Actuator (Vent) Mode Actuator (Vent)
22 Mode Actuator (Defog Blow) Mode Actuator (Defog Blow)
23 Temperature Actuator (Cold) Temperature Actuator (Cold)
24 Temperature Actuator (Warm) Temperature Actuator (Warm)
25 Intake Actuator (Fresh) Intake Actuator (Fresh)
26 Intake Actuator (Recirculation) Intake Actuator (Recirculation)
27 C-CAN (High) C-CAN (High)
28 C-CAN (Low) C-CAN (Low)
29 Max. Blower Fan Signal Max. Blower Fan Signal
30 - -
31 Blower Fan Signal to Common Blower Fan Signal to Common
32 Rheostat (ILL-) Rheostat (ILL-)

Test yourself

A quick Kia Cee'd quiz: every answer comes with an explanation and a link to the manual page.