KIA Niro: A/C Pressure Transducer
A/C Pressure Transducer Components and components location
- A/C Pressure Transducer
Description
A/C pressure transducer measures the pressure in high pressure line and converts it into voltage. Based on the converted voltage, engine ECU controls cooling fan by operating it at high or low speed. Engine ECU stops the operation of compressor when the temperature of refrigerant line is too high or low irregularly to optimize air conditioning system.
A/C Pressure Transducer Repair procedures
Inspection
- Measure the pressure of high pressure line by measuring voltage output between terminals "1" and "2".
- Check if the voltage is within specification.
Voltage = 0.00878835 * Pressure + 0.37081095
- If the measured voltage is not wihtin specification, replace the A/C pressure transducer.
Replacement
- Disconnect the negative (-) battery terminal.
- Recover the refrigerant with a recovery/charging station.
Warning
If PAG oil mixes into the POE oil of the system, dielectric breakdown may occur due to decreased volumetric resistivity and the A/C compressor may not work.
- Disconnect the A/C pressure transducer connector (A).
- Remove the A/C pressure transducer (B).
Warning
Be careful not to bend the liquid & suction pipe.
- Install in the reverse order of removal.
Warning
When installing, replace it with a new O-ring (A).
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Evaporator Core Repair procedures, Evaporator Temperature Sensor
Replacement
Disconnect the negative (-) battery terminal.
Remove the heater and blower assembly.
(Refer to Heater - "Heater Unit")
Remove the heater unit lower case (A) after loosening the mounting screws.
In-car Sensor
In-car Sensor Description and operation
Description
The in-car air temperature sensor is built into the heater & A/C control
unit.
The sensor consists of a thermistor that measures the temperature inside the
vehicle. The signal
decided
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It is comprised of a small transponder in
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determines and verifies if the ignition
key is valid o
Heater Unit Repair procedures
Replacement
Warning
When prying with a flat-tip screwdriver or a prying trim tool, wrap
a protective tape around the related parts and the tool to
prevent damage.
Disconnect the negative (-) battery terminal.
Recover the refrigerant with a
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