Hyundai Sonata LF: Air Conditioning System / A/C Pressure Transducer Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / A/C Pressure Transducer Repair procedures

Inspection

1.	Measure the pressure of high pressure line by measuring voltage output between terminal "1" and "2".

Inspect the voltage value whether it is sufficient to be regular value or not.

Vdd * (0.001758 * Pressure(Psia) + 0.074126

3.	If the measured voltage value is not wihtin specification, replace the A/C pressure transducer.

Diagnosis With GDS

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.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Recover the refrigerant with a recovery/charging station.

3.	Disconnect the A/C pressure transducer connector (A).

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)

Be careful not to bend the liquid & suction pipe.

Install in the reverse order of removal.

When installing, replace it with a new O-ring (A).

A/C Pressure Transducer Description and Operation

Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed...

Evaporator Temperature Sensor Description and Operation

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...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Schematic Diagrams

Schematic [EPB Type] [General Type] Terminal Funtion [EPB Type] PIN NODesciptionCurrentmaxmin1Voltage supply for pump motor39A 10A 2RR EPB motor power30A - 3RR EPB motor ground30A - 4- - - 5Local CAN High 30mA 20mA 6Electric parking brake signal 1 20mA - 7Electric parking brake signal 220mA - 8Electric parking brake signal 320mA - 9Electric parking brake signal 420mA - 10- - - 11- - - 12RL EPB motor ground30A - 13RL EPB motor power30A - 14Ground for solenoid valves and ECU30A 10A 15- - - 16ESS200mA 100mA 17FR Wheel speed sensor signal16...

Hyundai Sonata LF 2014-2019 Service Manual: Front Strut Assembly Components and Components Location