Hyundai Palisade (LX2): Air conditioning System / A/C Pressure Transducer
Description and operation
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. Engine
ECU stops the operation of the compressor when the temperature of refrigerant
line is very high or very low irregularly to optimize air conditioning system.
Repair procedures
| • |
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")
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|
| 1. |
Turn the ignition switch OFF.
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| 2. |
Install the refrigerant recovery/recycling/charging system.
(Refer to Air Conditioning System - "Repair procedures")
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| 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
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| 5. |
Measure the sensor output voltage between terminal "1" and "2".
Pin No
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Function
|
1
|
Ground
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2
|
Voltage
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3
|
Power (+5V)
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|
| 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.
| •
|
Check if the output voltage changes when the high pressure
value of the refrigerant line changes.
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|
|
| 1. |
Disconnect the negative (-) battery terminal.
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| 2. |
Recover the refrigerant with a recovery/charging station.
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| 3. |
Disconnect the A/C pressure transducer connector (A).
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| 4. |
Remove the A/C pressure transducer (A).
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Tightening torque :
10 - 12 N.m (1.02 - 1.22 kgf.m, 7.4 - 8.8 lb-ft)
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|
| 5. |
Install in the reverse order of removal.
| •
|
When installing, replace it with a new O-ring (A).
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|
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Repair procedures
SReplacement
1.
Remove the condenser.
(Refer to A/C System - "Condenser")
2.
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:
Components and components location
Component Location
1. Heater unit assembly
Components
1. Heater core assembly
2. Heater unit pad
3. Heater lower cover
4. Drain hose
5.
Removal
SVM Rear Camera
•
In case of bad quality or poor focus, be sure to check the camera
lense surface condition and foreign materials.
