1997 SSANGYONG KORANDO low oil pressure

SSANGYONG MY2002
7C-4 MANUAL & SEMIAUTO-HVAC
DIAGNOSIS
Insufficient
cooling
 Check blowing outlet
Normal outlet
 Check outlet temperature
 Check fan motor operation
Motor operates
with poor outletFan motor does
not operate
 Blown fuse
 Check for motor control circuit
Poor outlet or no
outlet
Intake grille is
cloggedFrosted evaporatorHigh temperatureNormal temperature
 Check the case
 Check heater Check
compressor
operation Warmeaporator
(A/C S/W off, Fan
‘4’)
 Check with sight
glass
 Check thermo amp Remove
cloggings
Normal compressorFaulty compressor
 Check belt
Tension is normal
 Check
magnetic
clutch
 Check clutch
connection
 Check wire Adjust tension
Bubble is not foundBubble is found
 Check refrigerant
volume and air in
system  Check
pressure
Loosened tension
Bubble is not foundBubble is found
 Check refrigerant  Check pressure
Faulty magnetic
electricFaulty clutchFaulty compressor operation
 Check battery voltage
 Check control switch
 Check ground
Normal high/low pressureHigh high/low pressureHigh pressure : low
Low pressure : high
 Check intake
and outlet
temperature  Faulty A/C system
 Faulty A/C mix door
 Faulty vent, intake door Excessive refrigerant
 Dirty cond., fan
 Excessive oil in system
- No diffence in
temperature
- Fast pressure balanceLow intake temperature
 Faulty comp. outlet  Faulty evaporatorNoise
CompressorBeltOthers
 Excessive oil
 Faulty bearing
 Faulty clutch Identify the place
 Faulty belt
 Belt line is correct
 Check belt tension

SSANGYONG MY2002
7C-6 MANUAL & SEMIAUTO-HVAC
Oily clutch plate
Low voltage
Faulty electric connection or operationChecksActionClean oily plate using cleaning agent.
Charge battery or check for cause.
Check wire continuity
Check A/C switch and fan switch for continuity and
ground.
Magnetic Clutch Plays By Hand Only
Excessive clearance between
Clutch plate and clutch coilChecksActionAdjust clutch clearance (0.2-0.6mm).
DEFECTIVES IN COMPRESSOR CIRCUIT
Compressor Does Not Run
Faulty high/low pressure
Faulty A/C relayChecksActionCheck compressor magnet voltage supply.
A/C relay.
Magnetic Clutch Slips / Idles

MANUAL & SEMIAUTO-HVAC 7C-7
SSANGYONG MY2002
DIAGNOSIS USING THE MANIFOLD GAUGE
On normal operation during the cooling cycle, the
manifold gauge must indicate approximately 1.5 - 2.0
kg/cm
2 at low pressure side and 14.5 - 15 kg/cm2 at
high pressure side, on condition that the temperature
at the cooler inlet, 30 ºC - 35 ºC, 2,000 rpm of the
engine rpm , full cold and maximum blower speed.
Cause Symptom
Action
1. High and low pressure are abnormally low.
2. Air at cooler outlet is not cold.
1. High and low pressure are abnormally high.
1. High and low pressure are abnormally high.
2. Connection at the low pressure is not cold.
There is a gas leak in the
cooling system.
Insufficient cooling and
faulty condenser cooling
by excessive
refrigerant.
Belt is slipped
There is an air in the
cooling system
Check the oil leak,
repair
Add the refrigerant
Keep the specified
amount of the
refrigerant, Clean the
condenser
Repair the belt
Clean and repair the
receiver-drier
Check the oil
contamination etc.
YAD7B070
YAD7B080
YAD7B100 YAD7B090

SSANGYONG MY2002
7C-8 MANUAL & SEMIAUTO-HVAC
1. The low-pressure and high-pressure are exces-
sive high.
2. There are a lot of moistures in the connection
of the low-side pressure
Cause SymptomAction
1. The low-pressure side indicates excessive high
and high-pressure indicates excessive low.
2. There is a moisture in the connection of the re-
ceiver-drier and the front/back of the expan-
sion valve.
1. The low-side pressure is high or normal inter-
mittently.
The dust and moisture
etc. are frozen at the
expansion valve
A gas leak in the heat
reducer
The mixed moisture is
frozen at the expansion
valve
The faulty expansion
valve, the improper
installation of the heat
reducer
Fail to control the flow
rate
Repair the receiver-drier
Replace the expansion
valve for the faulty heat
reducer
Repair the receiver-drier
and perform the
bleeding
Repair the receiver-drier
Check the oil
contamination etc.
1. The low-pressure is excessive high and high-
pressure is excessive low.
There is an oil leak in
the compressorReplace the compressor
YAD7B110
YAD7B130 YAD7B120
YAD7B140

SSANGYONG MY2002
7C-14 MANUAL & SEMIAUTO-HVAC
REFRIGERANT CHARGING
Installation of Manifold Gauge
1. Close both high/low pressure hand valves of
manifold gauge before installation of gauge to the
charging valve.
2. Both high/low pressure hand valves of manifold
gauge connect the appropriate charging valve.
Tighten the hose nuts by hand.
high pressure hand valve → high pressure
charging valve
low pressure hand valve → low pressure
charging valve
Discharging Refrigerant
1. Connect the manifold gauge to the charging valve.
2. Place the free end of the center hose in a shop
towel.
3. Slowly open the high pressure hand valve and
discharge refrigerant.
Notice: If refrigerant is allowed to escape too fast,
compressor oil will be drawn out of the system.
4. Check whether the shop towel gets wet in oil and
if wet, close the hand valve.
5. After the high pressure gauge reading drops below
3.5 kg/cm
2, slowly open the low pressure valve.
6. When both high and low pressure gauges reading
drops to 0 kg/cm
2, discharging is completed.
Evacuating Refrigeration System
Notice: The unit tank must contain a sufficient amount
of R-134a refrigerant for charging. Check the amount
of refrigerant in the tank. If there is less than 3.6 kg
(8 pounds) of refrigerant, add new refrigerant to the
tank.
1. Verify that the high-side and the low-side hoses
are connected to the A/C system. Open both the
high-side and the low-side valves on the unit’s
control panel.
2. Open both the gas and the liquid valves on the
tank.
YAD7B150
YAD7B160
YAD7B170
MAINTENANCE AND REPAIR

MANUAL & SEMIAUTO-HVAC 7C-15
SSANGYONG MY2002
Important: Refer to the manufacturer’s
instructions for the charging station in use. It is
necessary to evacuate the system before
recharging it with new or recycled refrigerant.
3. Start the vacuum pump and begin the evacuation
process. Non-condensable gases (mostly air) are
vented from the tank automatically during the
recycling process. The pressure being released
may be heard.
4. Check for leaks in the system. Refer to the
manufacturer’s instructions for the charging
station in use.
Important: Change the vacuum pump oil
frequently. Refer to the manufacturer’s
instructions for the charging station in use.
Check for Refrigerant Leaks
1. Connect the center hose of the gauge to the
refrigerant tank.
2. Open the high pressure valve of the gauge to
charge with refrigerant gas.
3. Charge until the low pressure gauge reads 1.0 kg/cm
2
and close the valve.
4. Using a gas leak detector, check the system for
leaks.
5. If any leak is found, replace O-ring or repair the
faulty connection.
How to Use the Tap Valve
1. Rotate the handle counterclockwise fully before
connecting the valve to the refrigerant tank.
2. Rotate the disk counterclockwise fully.
3. Connect the center hose to the valve fitting and
then rotate the disk clockwise fully by hand.
4. Rotate the handle clockwise to drill the sealed
hole.
5. Remove the hose nut securing the center fitting
of the manifold gauge and then tighten the nut
again in a few seconds.
YAD7B180
YAD7B190
YAD7B200

SSANGYONG MY2002
7C-22 MANUAL & SEMIAUTO-HVAC
3. Disconnect the inlet and outlet pipes of receiver
drier.
Notice: When installing, check the O-ring and
apply the compressor oil.
Installation Notice
4. Remove the bracket bolt and then remove the
receiver drier.
Installation Notice
5. Installation should follow the removal procedure
in the reverse order.
KAA7C250
Removal & Installation Procedure
1. Disconnect the negative(-) terminal from the
battery.
2. Discharge refrigerant from the system.
Notice: By connecting a manifold gauge
connection hose to High/Low pressure line,
discharge the refrigerant.
Tightening Torque4 - 6 Nm
(35 - 53 lb-in)
Tightening Torque5 - 8 Nm
(44 - 71 lb-in)

SSANGYONG MY2002
9A-20 BODY WIRING SYSTEM
W/H ENGINE CONTROL (GASOLINE)
6 Crankshaft position sensor
7 Oil pressure switch
8 Knock sensor 2
9 Air flow sensor
10 Ignition coil 3
11 Ignition coil 2
12 Ignition coil 1
13 Injector 6
14 Injector 5
15 Injector 416 Injector 3
17 Injector 2
18 Injector 1
19 Camshaft actuator
20 Camshaft position sensor
21 Engine coolant temperature sensor (Gauge)
22 Engine temperature sensor
23 Throttle motor & sensor
24 Knock sensor 1
25 Intake manifold resonance flap
KAA9A150