2012 SSANGYONG NEW ACTYON SPORTS oil pressure

07-51543-00
1. SYSTEM DESCRIPTION
1) Overview
The lubrication system supplies oil to each lubrication section to prevent friction and wear and to
remove heat from the friction part. As the engine runs, frictional heat is generated on each
lubrication section. If this condition persists, the bearing can be burned and stuck.
In other words, it creates an oil film on each sliding surface to convert solid friction to liquid
friction in order to minimize wear and prevent temperature increasing on the friction part.
For the D20DTF engine with no oil pressure switch, the engine ECU receives the low engine oil
level signal from the oil level sensor and communicates with the instrument cluster through the
CAN communication to turn on the warning lamp.
2) Components
Oil coolerOil dipstick gaugeOil pump
Oil filter moduleOil pressure switchOil pan

15-90000-00
2) ECU Control
(1) Function
a. ECU Function
ECU receives and analyzes signals from various sensors and then modifies those signals into
permissible voltage levels and analyzes to control respective actuators.
ECU microprocessor calculates injection period and injection timing proper for engine piston
speed and crankshaft angle based on input data and stored specific map to control the engine
power and emission gas.
Output signal of the ECU microprocessor drives pressure control valve to control the rail pressure
and activates injector solenoid valve to control the fuel injection period and injection timing; so
controls various actuators in response to engine changes. Auxiliary function of ECU has adopted
to reduce emission gas, improve fuel economy and enhance safety, comforts and conveniences.
For example, there are EGR, booster pressure control, autocruise (export only) and immobilizer
and adopted CAN communication to exchange data among electrical systems (automatic T/M
and brake system) in the vehicle fluently. And Scanner can be used to diagnose vehicle status
and defectives.
<00760097008c00990088009b00900095008e0047009b008c00940097008c00990088009b009c0099008c0047009900880095008e008c00470096008d0047006c006a007c00470090009a0047009500960099009400880093009300a000470054005b005700
47009b009600470052005f005c00b6006a004700880095008b> protected from factors like oil,
water and electromagnetism and there should be no mechanical shocks.
To control the fuel volume precisely under repeated injections, high current should be applied
instantly so there is injector drive circuit in the ECU to generate necessary current during injector
drive stages.
Current control circuit divides current applying time (injection time) into full-in-current-phase and
hold-current-phase and then the injectors should work very correctly under every working
condition.
b. Control Function
Controls by operating stages
To make optimum combustion under every operating stage, ECU should calculate proper
injection volume in each stage by considering various factors.
Starting injection volume control
During initial starting, injecting fuel volume will be calculated by function of temperature and
engine cranking speed. Starting injection continues from when the ignition switch is turned to
ignition position to till the engine reaches to allowable minimum speed.
Driving mode control
If the vehicle runs normally, fuel injection volume will be calculated by accelerator pedal travel
and engine rpm and the drive map will be used to match the drivers inputs with optimum
engine power. -
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15-370000-00
HFM (intake air
temperature)Cooling fan module
DSI 6 A/T (ATF
temperature)Coolant
temperature senso
r
Refrigerant
pressure sensor
Relay box
(12) Cooling fan control
A. Overview of cooling fan and A/C compressor
The cooling system maintains the engine temperature at an efficient level during all engine
operating conditions. The water pump draws the coolant from the radiator. The coolant then
circulates through water jackets in the engine block, the intake manifold, and the cylinder head.
When the coolant reaches the operating temperature of the thermostat, the thermostat opens.
The coolant then goes back to the radiator where it cools. The heat from automatic transmission
is also cooled down through the radiator by circulating the oil through the oil pump. ECU controls
the electric cooling fans with three cooling fan relays to improve the engine torque and air
conditioning performance.
For detailed information, refer to Chapter "Air Conditioning System".
B. Components
A/C compressor
D20DTR ECU

01-10
Black Light and Dye Method ▶
A dye and light kit is available for finding leaks, Refer to the manufacturer's directions when using
the kit.
Pour the specified amount of dye into the engine oil fill tube.
Operate the vehicle normal operating conditions as directed in the kit.
Direct the light toward the suspected area. The dyed fluid will appear as a yellow path
leading to the source. -
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Once the origin of the leak has been pinpointed and traced back to its source, the cause of the
leak must be determined in order for it to be repaired properly.
If a gasket is replaced, but the sealing flange is bent, the new gasket will not repair the leak. The
bent flange must be repaired also. Before attempting to repair a leak, check for the following
conditions and correct them as they may cause a leak.Repairing the Leak ▶
Gaskets ▶
The fluid level/pressure is too high.
The crankcase ventilation system is malfunctioning.
The seal bore is damaged (scratched, burred or nicked).
The seal is damaged or worn.
Improper installation is evident.
There are cracks in the components.
The shaft surface is scratched, nicked or damaged.
A loose or worn bearing is causing excess seal wear. -
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01-131113-01
Leakage Test ▶
Warm the engine up to normal operating temperature.
Disconnect the negative battery cable.
Remove the spark plugs.
Check the coolant level by opening the coolant reservoir cap and replenish if insufficient.
Open the engine oil filler cap.
Connect the tester to air pressure line and adjust the scale of tester.
Install the connecting hose to spark plug hole.
Position the piston of No.1 cylinder at TDC by rotating the crankshaft.
Connect the connecting hose to tester and measure the leakage volume after blowing up
5 bar of compressed air. -
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Measure the leakage volume in the completely opening condition of throttle valve by pulling
the acceleration cable. -
Perform the pressure test according to the firing order. -
Firing Order: 1 - 3 - 4 - 2 -
Compare the leakage pressure with the specifications. -

04-4
1. DESCRIPTIONS OF INDICATOR DISPLAY
Tachometer
ESP indicator/warning light
Immobilizer indicator
Glow indicator
Front fog light indicator
High beam indicator
ESP OFF indicator
Seat belt reminder (driver’s seat)
Seat belt reminder (passenger’s seat)
Engine oil pressure warning light
LCD Display
Engine overheat warning light
Engine check warning light
Auto cruise indicator
Light indicator
Winter mode indicator 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.Engine hood open warning light
Battery charge warning light
Hazard Indicator
Water separator warning light
Air bag warning light
4WD CHECK warning light
4WD LOW indicator
4WD HIGH indicator
Speedometer
Turn signal indicator
Coolant temperature gauge
Brake warning light
Door ajar warning light
ABS warning light
Fuel gauge
Low fuel level warning light 17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32. It sends and receives information to/from each unit through CAN communication line. The LCD
display and separate ESP ON/OFF indicator are newly added.

04-6
Connector Pin Arrangement ▶
The connector pin sections illustrated below are viewed from the front of the instrument
cluster. The arrangement of the pins is the same for both the main connector and the sub
connector.
Main connector - 20-pin (white)
Sub connector - 20-pin (gray)
1. -
2. Hood open
3. Seat belt - passenger's seat
4. -
5. -
6. Front fog lamp
7. -
8. Engine CHECK warning light
9. Charge
10. IGN 2
11. -
12. Air bag
13. Seat belt - driver's seat
14. High beam (-)
15. Right turn signal lamp (+)
16. High beam (+)
17. Left turn signal lamp (+)
18. Oil pressure
19. Parking brake signal input (STICS)
20. - 1. -
2. -
3. 4P output
4. Buzzer output
5. Illumination (+)
6. -
7. -
8. Door open
9. -
10. Battery
11. -
12. Fuel input signal
13. TRIP mode/reset switch
14. Manual transmission N (neutral)
input
15. Manual transmission R (reverse)
input
16. CAN LOW
17. CAN HIGH
18. AGND (fuel -)
19. MICOM ground
20. IGN 1

04-98210-01
No. Symbol ItemBulb
TypePower Turning ON condition
23Engine oil pressure
warning lampLED IGN Signal input
24Water separator
warning lightLED IGN IGN ON/ CAN signal input
25Engine coolant
overheat warning
lightLED IGN IGN ON/ CAN signal input
26Engine hood open
warning lampLED IGN Switch ground
27 EBD warning light LED IGN CAN signal input