Hyundai Venue (QX): Air Conditioning System / A/C Pressure Transducer. Repair procedures

Hyundai Venue (QX) (2020-2025) Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / A/C Pressure Transducer. Repair procedures

Inspection
Hyundai Venue. A/C Pressure Transducer. Repair procedures   
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Before measuring the pressure of the refriferant line, check whether the refrigerant amount is charged in accordance with the specified charging amount.
(Refer to Heating, Ventilation, Air Conditioning - "Specifications")
1.
Turn the ignition switch OFF.
2.
Install the refrigerant recovery/recycling/charging system.
(Refer to Air Conditioning System - "Repair procedures")
3.
Turn ON the ignition switch, put into operation the air conditioner.
4.
Calculate the reference voltage of the Recovery/Recycle/Recharge machine high pressure value using the formula below.
Reference voltage (V) = 0.0088 * pressure(psi) + 0.37
5.
Measure the sensor output voltage between terminal "1" and "2".

Hyundai Venue. A/C Pressure Transducer. Repair procedures

Pin No
Function
1
 Ground
2
 Voltage
3
 Power (+5V)

6.
If the reference voltage value and the sensor output voltage value are close to each other, the air conditioner pressure transducer is normal.
7.
If 0V is output or the reference voltage value and sensor output voltage value are not close to each other, replace the air conditioner pressure transducer.
Hyundai Venue. A/C Pressure Transducer. Repair procedures   
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Check if the output voltage changes when the high pressure value of the refrigerant line changes.

Hyundai Venue. A/C Pressure Transducer. Repair procedures
Diagnosis With GDS
1.
The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
※ The diagnostic system (GDS) provides the following information.
(1) Self diagnosis : Checking the failure code (DTC) and display.
(2) Current data : Checking the system input/output data state.
(3) Actuation test : Checking the system operation condition.
(4) Additional function : Other controlling such as he system option and zero point adjustment.
2.
Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.
3.
Select the 'Current data' menu to search the current state of the input / output data.
The input / output data for the sensors corresponding to the A/C Pressure Transducer can be checked.

Hyundai Venue. A/C Pressure Transducer. Repair procedures
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Recover the refrigerant with a recovery / charging station.
3.
Press the lock pin and separate the A/C pressure transducer connector (A).

Hyundai Venue. A/C Pressure Transducer. Repair procedures
4.
Remove the A/C pressure transducer (A).
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Hyundai Venue. A/C Pressure Transducer. Repair procedures

Hyundai Venue. A/C Pressure Transducer. Repair procedures   
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Be careful not to bend the liquid & suction pipe.
5.
To install, reverse the removal procedure.
Hyundai Venue. A/C Pressure Transducer. Repair procedures   
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When installing, replace it with a new O-ring.

    Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it.

    Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling.

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