HVAC System: Other Hyundai Sonata IV рестайлинг

PRECAUTIONS

The air conditioning system uses R-134a refrigerant and FD46XG (PAG) refrigerant oil, which are not compatible with R-12 refrigerant and mineral oil. Do not use R-12 refrigerant or mineral oil in this system, and do not attempt to use R-12 servicing equipment; damage to the air conditioning system or your servicing equipment will result.

If accidental system discharge occurs, ventilate work area before resuming service.

R-134a service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1. Always disconnect the negative cable from the battery whenever replacing air conditioning parts.
2. Keep moisture and dirt out of the system, When disconnecting any lines, plug or cap the fittings immediately; don t remove the caps or plugs until just before you reconnect each line.
3. Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.
4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.
5. When discharging the system, use a R-134a refrigerant recovery/recycling/charging station; don t release refrigerant into the atmosphere.

REFRIGERANT RECOVERY

If accidental system discharge occurs, ventilate work area before resuming service.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

Scheme 63

1. Connect a R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacturer s instruction.
2. Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to put the same amount of new refrigerant oil back into the A/C system before charging.

SYSTEM EVACUATION

If accidental system discharge occurs, ventilate work area before resuming service.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

Scheme 64

1. When an A/C System has been opened to the atmosphere, such as during installation or repair, it must be evacuated using a R-134a refrigerant recover/recycling/charging station (If the system has been open for several days, the receiver/dryer should be replaced, and the system should be evacuated for several hours.)
2. Connect a R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacturer s instruction. Evacuate the system.
3. If the low-pressure does not reach more than 93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes, there is probably a leak in the system. Partially charge the system, see «SYSTEM CHARGING»(ref-173304-S20740742742005031400000) , and check for leaks, see «INSPECT FOR LEAKAGE OF REFRIGERANT»(ref-173304-S11463118712005031400000) .

SYSTEM CHARGING

If accidental system discharge occurs, ventilate work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

Scheme 65

1. Connect a R-134a refrigerant recover/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacture s instructions.
2. Add the same amount of new refrigerant oil to the system that was removed during recovery. Use only FD46XG (PAG) refrigerant oil.
3. Charge the system with the specified amount of R-134a refrigerant. Do not overcharge the system; the compressor will be damaged.

Refrigerant capacity: 680 +/- 25g

Scheme 66

Scheme 67

Scheme 68

Scheme 69

Scheme 70

1. After opening the grove box, pull it downward by pressing the both side of glove box in ward.
2. Lower the glove box down after taking out the damper strap from the hole.
3. Disconnect the luggage compartment lamp connector.
4. After turning the lever of filter cover, remove the filter cover.
5. Replace the air conditioner filter.
6. Installation is the reverse of removal.

Scheme 71

Scheme 72

1. Remove the clutch hub retaining bolt with the aid of a spanner wrench.
2. Pull the clutch hub. If the hub can not be pulled from the compressor shaft, screw an 8 mm bolt into the shaft hole of the clutch hub to force the hub from the shaft.
3. Remove the pulley retaining snap ring and then pull the pulley and bearing assembly from the compressor.

Scheme 73

CLUTCH FIELD COIL

1. Remove the clutch hub and pulley following the procedure given.
2. Install shaft protector tool on the nose opening of the compressor.
3. Install the pulley on the compressor as shown in the illustration. Place the tip of the puller screw on the center dimple of the shaft protector and the jaws of the puller around the back side of the field coil.
4. Tighten the forcing screw with a wrench to pull the coil loose from the compressor front head.

Scheme 74

Scheme 75

1. After reassembling the compressor assembly by the reverse of the disassembly procedure given, check the clutch air gap between the clutch hub and the pulley mating surface with a feeler gauge. The air gap should be as follows. Air gap: 0.35 ~ 0.65 mm (0.014 ~ 0.026 inch) NOTE: When reassembling the compressor assembly, clean the pulley bearing surface and coil press diameter of the front head to remove any dirt or corrosion.
2. If the clutch air gap is not within the dimensions specified above, adjust the various thickness shims until the air gap is within the specified limits.

SERVICE POINT

If a new compressor is installed, first adjust the amount of oil according to the procedures described below, and then install the compressor.

1. Measure the amount (Xcm 3 ) of oil inside the removed compressor.
2. Drain the amount of oil calculated according to the following formula from the new compressor, and then install the new compressor. New compressor oil amount: 150cm 3 - Xcm 3 = Ycm 3 NOTE: Ycm 3 indicates the amount of oil in the refrigerant line, the condenser, the cooling unit, etc. When replacing the following parts at the same time as the compressor, subtract the rated oil amount of each part from Ycm 3 and discharge this amount from the new compressor . Compressor oil: FD46XG (PAG OIL) Quantity: 30cm 3 (1.0 fl.oz.) 40 cm 3 (1.4 fl.oz.) 10cm 3 (0.3 fl.oz.) 20 cm 3 (0.6 fl.oz.)

Scheme 76

CONDENSER

1. Check the condenser fins for blockage or damage. If the fins are clogged, clean them with compressed air. If the fins are bent, straighten them with a screwdriver or a pair of pliers.
2. Check the condenser fittings for leakage. Repair or replace if necessary. Condenser fan assembly.

CHECKING

Measure the resistance and the temperature.

25°C: 30 +/- 0.36 kohm

Scheme 77

Scheme 78

1. The photo sensor located in the center of main crash pad assembly.
2. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation received which is transferred to the automatic temperature control module so that the solar radiation compensation will be performed.

Scheme 79

1. In bright place, measure ampere between pin 1 and battery (-) terminal.
2. In dark place, measure ampere between pin 2 and battery (+) terminal.
3. Check the ampere in the bright place is higher than in the dark. NOTE: The voltage is same as the ampere.

1. Disconnect battery terminal (-).
2. Detach the harness of the ambient temperature sensor.
3. Measure the resistance as shown.

Resistance 20°C: 36.5 +/- 2.3 kohm

Scheme 80

1. Connect voltmeter to pin 1 (+) and pin 6 (-).
2. Inspect that voltage changes up to air mixing door position pushing temperature switch up and down. (COOL: 17°C, HOT: 32°C)

Note. Cool means that the mix door is open to cool side. Of course, warm is opposite.

Scheme 81

1. Remove evaporator.
2. Remove evaporator temperature sensor.
3. Check the resistance between terminals 1 and 2 of evaporator temperature sensor connector at each temperature.

Resistance

at 0°C: 11.1 +/- 11.6 kohm

at 15°C: 5.8 +/- 6.1 kohm

Scheme 82

Scheme 83

CIRCUIT DIAGRAM

For circuit wiring diagram, refer to AIR CONDITIONING .

BLOWER SWITCH

Check for continuity between terminals as shown below.

Scheme 84

If continuity is not as specified, replace the control panel.

Scheme 85

MODE CONTROL SWITCH & LT; ROTARY & PUSH BUTTON TYPE ONLY & GT

Check for continuity between terminals.

Scheme 86

If continuity is not as specified, replace the control panel.

FRESH/RECIRC BUTTON

Check for continuity between terminals.

Scheme 87

If continuity is not as specified, replace the control panel.

Scheme 88

For circuit wiring diagram, refer to AIR CONDITIONING .