Kia Rio: Temperature Control Actuator Inspection - Heater - Heating,Ventilation, Air Conditioning - Kia Rio UB 2012-2020 Service ManualKia Rio: Temperature Control Actuator 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 position when connecting 12V to terminal 3 and grounding terminal 4.
Verify that the temperature control actuator operates to the cool position when connecting in the reverse.


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

4.
Connect the temperature control actuator connector.
5.
Turn the ignition switch ON.
6.
Check the voltage between terminal 6 and 5.
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 within specification, substitute with a known-good temperature control actuator and check for proper operation.
8.
Replace the temperature control actuator if it is proved that there is a problem with it.
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