Heating, Ventilation, and Air Conditioning
Heater & Air Conditioning Control Unit (DATC) Components and Component Locations
In this manual: Heating, Ventilation, and Air Conditioning
~3min read
Components

| Connector | Pin No. | Function | Connector | Pin No. | Function |
| A | 1 | Rear Light (+) | A | 29 | Humidity (PWM) |
| 2 | REF Sensor (+5V) | 30 | Photo Sensor (-) - Left | ||
| 3 | C-CAN (High) | 31 | - | ||
| 4 | C-CAN (Low) | 32 | Photo Sensor (-) - Right | ||
| 5 | Mode Actuator (Vent) | 33 | ECV + | ||
| 6 | Mode Actuator (Defog Blow) | 34 | ECV - (Ground) | ||
| 7 | Mode Actuator Feedback | 35 | FET (Gate) | ||
| 8 | Intake Actuator (Fresh) | 36 | Duct Sensor (+) - Vent | ||
| 9 | Intake Actuator (Recirculation) | 37 | Duct Sensor (+) - Floor | ||
| 10 | Intake Actuator Feedback | 38 | - | ||
| 11 | K-Line | 39 | - | ||
| 12 | HTD (Rear Defrost Indicator) | 40 | - | ||
| 13 | Rear Defogger Switch | B | 1 | Ground | |
| 14 | Temperature Actuator (Cool) - Driver | 2 | Sensor Ground | ||
| 15 | Temperature Actuator (Warm) - Driver | 3 | FET (Drain Feedback) | ||
| 16 | Temperature Door Actuator Feedback - Driver | 4 | Ionizer Diagnosis | ||
| 17 | - | 5 | Clean Signal | ||
| 18 | - | 6 | ION SIGNAL | ||
| 19 | - | 7 | Ignition 1 | ||
| 20 | Rheostat (ILL-) | 8 | Ignition 2 | ||
| 21 | Lock Outside (+) | 9 | Ground | ||
| 22 | - | 10 | - | ||
| 23 | PTC Relay | 11 | Temperature Sensor Feedback - Passenger | ||
| 24 | - | 12 | Temperature Sensor (Cool) - Passenger | ||
| 25 | - | 13 | Temperature Sensor (Warm) - Passenger | ||
| 26 | - | 14 | Blower Motor (+) | ||
| 27 | Ambient Temperature Sensor (+) | 15 | - | ||
| 28 | Evaporator Temperature Sensor (+) | 16 | Battery |
Diesel Connector Pin Function
| Connector | Pin No. | Function | Connector | Pin No. | Function |
| A | 1 | Rear Light (+) | A | 29 | Humidity (PWM) |
| 2 | REF Sensor (+5V) | 30 | Photo Sensor (-) - Left | ||
| 3 | C-CAN (High) | 31 | - | ||
| 4 | C-CAN (Low) | 32 | Photo Sensor (-) - Right | ||
| 5 | Mode Actuator (Vent) | 33 | ECV + | ||
| 6 | Mode Actuator (Defog Blow) | 34 | ECV - (Ground) | ||
| 7 | Mode Actuator Feedback | 35 | FET (Gate) | ||
| 8 | Intake Actuator (Fresh) | 36 | Duct Sensor (+) - Vent | ||
| 9 | Intake Actuator (Recirculation) | 37 | Duct Sensor (+) - Floor | ||
| 10 | Intake Actuator Feedback | 38 | - | ||
| 11 | K-Line | 39 | - | ||
| 12 | HTD (Rear Defrost Indicator) | 40 | - | ||
| 13 | Rear Defogger Switch | B | 1 | Ground | |
| 14 | Temperature Actuator (Cool) - Driver | 2 | Sensor Ground | ||
| 15 | Temperature Actuator (Warm) - Driver | 3 | FET (Drain Feedback) | ||
| 16 | Temperature Door Actuator Feedback - Driver | 4 | Ionizer Diagnosis | ||
| 17 | - | 5 | Clean Signal | ||
| 18 | - | 6 | ION SIGNAL | ||
| 19 | - | 7 | Ignition 1 | ||
| 20 | Rheostat (ILL-) | 8 | Ignition 2 | ||
| 21 | Lock Outside (+) | 9 | Ground | ||
| 22 | - | 10 | - | ||
| 23 | PTC Relay 2 | 11 | Temperature Sensor Feedback - Passenger | ||
| 24 | PTC Relay 3 | 12 | Temperature Sensor (Cool) - Passenger | ||
| 25 | PTC ON Signal | 13 | Temperature Sensor (Warm) - Passenger | ||
| 26 | - | 14 | Blower Motor (+) | ||
| 27 | Ambient Temperature Sensor (+) | 15 | - | ||
| 28 | Evaporator Temperature Sensor (+) | 16 | Battery |
Test yourself
A quick Kia Cee'd quiz: every answer comes with an explanation and a link to the manual page.
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