torque SSANGYONG KORANDO 1997 Service Repair Manual

1F2 -- 56 M161 ENGINE CONTROLS
D AEW OO M Y_2000
INDUCTION SYSTEM
THROTTLE VALVE ACTUATOR
YAA1F540
The throttle actuator is actuated by the Engine Control Module (ECM) according to the position of the accelerator pedal
position.
It has two potentiometers which signal the position of the throttle valve to the ECM to enable it to recognize the various
engine load states.
Ignition “Off”
In the de-- energized states the throttle valve position is determined to be spring capsule.
Ignition “On”
When the ignition S/W on the servo motor in the throttle actuator is operated by the ECM. The throttle valve adopts a
position in line with the coolant temperature.
Closed position
In the closed throttle position, the servo motor controls engine speed by operating the throttle valve further (greater
mixture) or closing it further (reduced mixture), depending on coolant temperature and engine load. When this is done,
the throttle valve can be closed further by the servo motor overcoming the force of the spring capsule (mechanical end
stop). If the actuator is de-- energized, the throttle valve is resting against the spring capsule.
Consequently, the throttle valve opening is a constant 10-- 12°approximately.
At no load, this produces an engine speed of about 1,800 rpm
Driving
When driving (part/full throttle), the servo motor controls the throttle valve in line with the various load states and ac-
cording to the input signals from the pedal value sensor according to the input signals from the pedal value sensor
according to the position of the accelerator pedal.
The function of the EA (electronic accelerator) in the ECM determines the opening angle of the throttle valve through
the throttle actuator. Further functions are;
DIdle speed control
DCruise control
DReducing engine torque for ASR/ABS operation
DElectronic accelerator emergency running
DStoring faults
DData transfer through CAN

1F2 -- 64 M161 ENGINE CONTROLS
D AEW OO M Y_2000
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
YAA1F590
Engine Coolant Temperature (ECT) sensor detects coolant temperature and supplies information to the ECM. It is
composed of metal housing with two NTC resistor, 4 pin connector. The ECM provides a 5 volt signal to the ECT
sensor through a dropping resistor. When the engine is cold, the ECT sensor provides high resistance, which the ECM
detects as a high signal voltage. As the engine warms up, the sensor resistance becomes lower, and the signal voltage
drops. At normal engine operating temperature, the ECT signalwill measure about 1.5 to 2.0 volts.
The ECM uses information about coolant temperature to make the necessary calculations for:
DFuel delivery
DIgnition control
DKnock sensor system
DIdle speed
DTorque converter clutch application
DCanister purge
DCooling fan operation
DOthers

M161 ENGINE CONTROLS 1F2 -- 95
D AEW OO M Y_2000
MAINTENANCE AND REPAIR
YAA1F700
ON VEHICLE SERVICE
DISCHARGING THE PRESSURE IN
FUEL SYSTEM
Removal and Installation Procedure
1. Remove the fuel pressure test connector.
Installation Notice
Tightening Torque
25 NSm (18 lb-ft)
YAA1F710
2. Remove the fuel pressure in fuel system by pressing
the service valve with a clean, pointy tool.
Notice:Place a cloth so that the fuel doesn’t stain
around.
3. Installation should follow the removal procedure in
the reverse order.
YAA1F170
FUEL PUMP
Tools Required
661 589 00 46 00 Fuel Tank Cap Wrench
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Relieve the fuel system pressure. Refer to “Discharg-
ing the Pressure in Fuel System” in this section.
2. Disconnect the negative battery cable.
3. Put aside the floor carpet to remove the fuel pump ac-
cess cover.
4. Remove the fuel pump access cover.
5. Remove the fuel pump wiring connectors.
6. Disconnect the fuel supply and return pipes.
7. Remove the fuel pump locking cap band.

1F2 -- 96 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F550
8. Using the fuel tank cap wrench 661 589 00 46 00,
remove the locking cap.
9. Remove the pump from the fuel tank.
Notice:Check the condition of the seal and replace if
necessary. Drain the fuel before removing the pump.
10. Perform an operational check of the fuel pump.
11. Installation should follow the removal procedure in
the reverse order.
YAA1F190
FUEL FILTER
Removal and Installation Procedure
1. Disconnect the negative battery cable.
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
2. Relieve the fuel system pressure. Refer to “Dis-
charging the Pressure in Fuel System” in this sec-
tion.
3. Disconnect the fuel lines from the fuel filter.
Installation Notice
Tightening Torque
28 NSm (21 lb-ft)
4. Remove the fuel filter mounting bracket bolt .
Installation Notice
Tightening Torque
6NSm (53 lb-in)
Notice:Place the fuel pump pad. There may be a corro-
sion due to the contact between the fuel filter and the
bracket.
5. Remove the fuel filter.
6. Install the fuel filter.
7. Perform a leak test of the fuel filter.
8. Installation should follow the removal procedure in
the reverse order.

M161 ENGINE CONTROLS 1F2 -- 97
D AEW OO M Y_2000
KAA1F370
FUEL TANK
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Relieve the fuel pressure. Refer to “Discharging the
Pressure in Fuel System” in this section.
2. Disconnect the negative battery cable.
3. Drain the fuel tank.
4. Put aside the floor carpet to remove the fuel pump
access cover.
5. Remove the fuel pump access cover.
YAA1F170
6. Disconnect the return line.
7. Disconnect the supply line.
8. Disconnect the fuel tank-to-canister hose from the
fuel tank.
9. Disconnect the fuel pump wiring connector.
KAB1F370
10. Disconnect the fuel filler hose and air vent hose from
the fuel tank.
11. Support the fuel tank.
12. Remove the fuel tank retaining nuts.
Installation Notice
Tightening Torque
38 NSm (28 lb-ft)
13. Carefully lower the fuel tank.

1F2 -- 98 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F180
14. Turn the roll over valves counterclockwise at an
angle of 90 degrees.
15. Turn the lock ring counterclockwise.
16. Remove and discard the gasket.
17. Installation should follow the removal procedure in
the reverse order.
YAA1F700
FUEL PRESSURE REGULATOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Remove the fuel pressure test connector.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)
YAA1F720
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
3. Relieve the fuel pressure in fuel supply system by
pressing the service valve.
YAA1F730
4. Disconnect the vacuum hose.
5. Disconnect the circlip and remove the fuel pressure
regulator.
6. Apply the oil to O-ring lightly and then replace it.
7. Perform a leak test of the fuel pressure regulator
with the engine off and the ignition on.
8. Installation should follow the removal procedure in
the reverse order.

M161 ENGINE CONTROLS 1F2 -- 99
D AEW OO M Y_2000
YAA1F710
FUEL RAIL AND INJECTORS
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Discharge the fuel pressure from the fuel pressure
test connector.
2. Disconnect the negative battery cable.
3. Disconnect the vacuum hose from the fuel pressure
regulator.
YAA1F740
4. Remove the cable guide.
5. Disconnect the Hot Film Air Mass (HFM) sensor
connector.
6. Remove the intake air duct mounting bolts.
Installation Notice
Tightening Torque
9NSm (80 Ib-in)
7. Remove the intake air duct clamps.
8. Remove the intake air duct.
YAA1F750
9. Remove the fuel return and supply line.
Notice:For removal, cover around parts with cloths not
to be stained by fuel. In case of checking the injector
only, do not remove the fuel return and supply line.
Installation Notice
Tightening Torque
23 NSm (17 Ib-ft)
10. Remove the six injector connectors.
YAA1F760
11. Remove the two left and two right bolts and one cen-
ter bolt of the fuel rail assembly from the intake man-
ifold.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)

1F2 -- 100 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F770
Notice:Before removal, the fuel rail assembly may be
cleaned with a spray-type cleaner, following package in-
structions. Do not immerse the fuel rails in liquid clean-
ing solvent. Use care in removing the fuel rail assembly
to prevent damage to the electrical connectors and in-
jector spray tips. Prevent dirt and other contaminants
from entering open lines and passages. Fittings should
be capped and holes plugged during service.
Important:If an injector becomes separated from the
rail and remains in the cylinder head, replace the injector
O-ring seals and the retaining clip.
12. Remove the injectors and the fuel rail carefully.
13. Remove the fuel injector retainer clips.
14. Remove the fuel injectors by pulling them down and
out.
15. Discard the fuel injector O-rings.
16. Lubricate the new fuel injector O-rings with engine
oil. Install the new O-rings on the fuel injectors.
17. Perform a leak check of the fuel rail and fuel injec-
tors.
18. Installation should follow the removal procedure in
the reverse order.
YAA1F780
ENGINE COOLANT TEMPERATURE
SENSOR
Removal and Installation Procedure
1. Relieve the coolant system pressure.
2. Disconnect the negative battery cable.
3. Disconnect the engine coolant temperature sensor
connector.
Notice:Take care when handling the engine coolant
temperature sensor. Damage to the sensor will affect
the proper operation of the fuel injection system.
4. Remove the engine coolant temperature sensor
from the pump hosing.
Installation Notice
Tightening Torque
30 NSm (22 Ib-ft)
5. Installation should follow the removal procedure in
the reverse order.

M161 ENGINE CONTROLS 1F2 -- 101
D AEW OO M Y_2000
YAA1F740
THROTTLE BODY (INTEGRATED
WITH THE ACTUATOR)
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the mass air flow sensor connector.
3. Disconnect the mass air flow sensor from the air fil-
ter housing.
4. Remove the intake air duct mounting bolts.
Installation Notice
Tightening Torque
9NSm (80 lb-in)
5. Remove the air inlet housing clamps.
6. Remove the inlet air housing.
YAA1F790
7. Disconnect the throttle body electrical connector.
8. Remove the throttle body bolts.
Installation Notice
Tightening Torque
12 NSm (106 lb-in)
9. Remove the vacuum hose.
KAA1D240
10. Remove the throttle body and discard the gasket.
Important:Use care in cleaning old gasket material.
Sharp tools may damage sealing surfaces.
11. Installation should follow the removal procedure in
the reverse order.

1F2 -- 102 M161 ENGINE CONTROLS
D AEW OO M Y_2000
KAA1F190
HOT FILM AIR MASS (HFM) SENSOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the Hot Film Air Mass (HFM) sensor
electrical connector.
3. Remove the HFM sensor retaining screws.
4. Turn the HFM sensor coupling in the direction
shown in the figure in the left so that it gets sepa-
rated from the contact surface.
Notice:Make sure the HFM sensor coupling connects
completely with the contact surface installation.
5. Remove the HFM sensor.
6. Installation should follow the removal procedure in
the reverse order.
KAA1F180
KNOCK SENSOR
Removal and installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the knock sensor electrical connector
from the intake manifold bracket.
3. Remove the knock sensor mounting bolt from the
knock sensor installed on the cylinder block.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)
4. Remove the knock sensor.
5. Installation should follow the removal procedure in
the reverse order.