Kia Rio: Heater / Temperature Control Actuator

Kia Rio 2017-2020 YB Service Manual / Heating,Ventilation, Air Conditioning / Heater / Temperature Control Actuator

Description and operation
Description

The heater unit includes mode control actuator and temperature control actuator.

The temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows. Signal from control unit adjusts position of temperature door by operating temperature switch and then temperature will be regulated by the hot/cold air ratio decided by position of temperature door.

Repair procedures
Inspection
1.

Turn the ignition switch OFF.

2.

Disconnect the temperature control actuator connector.

3.

Verify that the temperature control actuator operates to the warm (LHD) or cool (RHD) position when connecting 12V to the terminal 3 and grounding terminal 4.

Verify that the temperature control actuator operates to the cool (LHD) or warm (RHD) position when connecting in the reverse.

1. -
2. -
3. Cool position
4. Warm position
5. Sensor (+ 5V)
6. Feedback signal
7. Sensor ground

4.

Connect the temperature control actuator connector.

5.

Turn the ignition switch ON.

6.

Check the voltage between terminal 6 and 5 (LHD) or 7 (RHD).

Specification

Door position
Voltage (V)
Error detecting
Max. cooling
0.4
Low voltage : 0.1V or less
Max. heating
4.6
High voltage : 4.9V or more

It will feedback current position of actuator to controls.

7.

If the measured voltage is not specification, substitute with a known-good temperature control actuator and check for proper operation.

8.

If the problem is corrected, replace the temperature control actuator.

Replacement
1.

Disconnect the negative (-) battery terminal.

2.

Remove the driver side shower duct (A) after loosening the screw.

3.

Disconnect the connector (A) and then remove the temperature control actuator (B) after loosening the mounting screws.

4.

Installation is the reverse order of removal.

Heater Unit
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Mode Control Actuator
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