1998 SSANGYONG MUSSO check engine

M161 ENGINE CONTROLS 1F2-29
Failure
codeItemChecking method Te s t
stepRequirementSpecified
valuePossible cause
3.2 - 3.6 bar· ·· ·
· Fuel
pressure:in
idling speed
- When the
vacuum is
applied· Engine:in idling
- Colse the valve
screw on pressure
testerÞ 1.0 Connect the fuel
pressure test plug to
the pressure tester
(refer to the flgure on
previous page).· Þ Fuel pump test
· Fuel pressure
regulator
3.7 - 4.2 bar
· ·· ·
· Fuel
pressure:in
idling speed
- When the
vacuum is
not applied· Engine:in idling
- Colse the valve
screw on pressure
tester Þ 2.0 Connect the fuel
pressure test plug to
the pressure tester
(refer to the flgure on
previous page).· Þ Fuel pump test
· Fuel pressure
regulator
> 3.0 bar
· ·· ·
· Fuel system
internal
leakage:· Engine:stop Þ 3.0 Connect the fuel
pressure test plug to
the pressure tester
(refer to the flgure on
previous page).· The pressure drops
rapidly:non-return
valve in fuel pump
> 2.5 bar· After 30 minutes
from engine stop· The pressure
drops slowly:
- Injector test
- Fuel pressure
regulator
- O-ring

M161 ENGINE CONTROLS 1F2-31
Failure
codeItemChecking method Test
stepRequirementSpecified
valuePossible cause
1 liter of fuel
supply for
max. 35
seconds· ·· ·
· Fuel pump:
- Fuel supply
ratio· Ignition:ON
- Disconnect the fuel
return pipe and
connect the host to
beaker to collect
the supplied fuel Þ 1.0· Þ 2.0
· Fuel line
5 - 9 A
· ·· ·
· Fuel pump:
- Current
consumption· Ignition:ON
- Remove the fuel
relay from the fuse
and relay box in
luggage
compartment and
connect the
amperemeter
between No.1 and
No.3 in relay
box(fuel pump relay
removed position)
for measuring
current
consumption Þ 2.0· Fuel pump
533
Multi tester(DC current)
31

M161 ENGINE CONTROLS 1F2-33
Figure 8. Shop Made Cable Figure 9. Fuel Injector Normal Spary Pattern
Failure
codeItemChecking method Test
stepRequirementSpecified
valuePossible cause
There should
be no leaks
and later
drops from
the injector· ·· ·
· Injector:
- Leakage
test· Ignition:ON
- Remove the fuel
distributor and fuel
injector with a unit. Þ 1.0· Þ 2.0
· Injector
The spray
pattern of the
injector most
show in the
figure 10
· Ignition:ON
- Connect the shop
made cable to the
injector.
- Collect the
spraying fuel with a
beaker
- Connect the shop
made cable to
No.11(+) and No.5
(-) terminal in test
box. Þ 2.0· Injector
533
· ·· ·
· Injector:
- Function
test and
spray
pattern
check
533

1F2-46 M161 ENGINE CONTROLS
3. Disconnect the vacuum hose.
4. Disconnect the circlip and remove the fuel pressure
regulator.
5. Apply the oil to O-ring lightly and then replace it.
6. Installation should follow the removal procedure in the
reverse order.
7. Check for fuel pressure and internal leaks by operating the
engine. 2. Discharge the pressure in fuel supply system by pressing
the service valve.
Removal & Installation Procedure
1. Remove the fuel pressure test connector.

1F2-50 M161 ENGINE CONTROLS
Tightening Torque
22.5 - 27.5 Nm
Tightening Torque22.5 - 27.5 Nm
Removal & Installation Procedure
1. Discharge the fuel pressure from the fuel pressure test
connector by pushing service valve (arrow).
2. Disconnect the battery ground cable.
3. Disconnect the vacuum hose from the fuel pressure
regulator.
4. Disconnect the cable from ignition coil.
5. Remove the fuel return and supply line.
Installation Notice
Notice
lFor removal, cover around parts with cloths not to
bestained by fuel.
lIn case of checking the injector only, do not remove the
fuel return and supply line.
6. Remove the four injector connectors (arrows).
7. Unscrew the two combination bolts (8).
Installation Notice

M161 ENGINE CONTROLS 1F2-51
9. Installation should follow the removal procedure in the
reverse order.
10. Check for fuel pressure and internal leakage by operating
the engine. 8. Pull out the injector from intake manifold and remove the
fuel distributor.
Notice
Replace the injector O-ring with new one.
Ignition Coil & Cable
lIgnition coil T1/1 No.1 cylinder + No.4 cylinder
lInition coil T1/2 No.1 cylinder + No.4 cylinder

M161 ENGINE CONTROLS 1F2-53
3. If there is no change in fuel pressure and maintain the
following pressure over 30 minutes, it is normal.
Internal Leakage Test
1. Connect the fuel pressure gauge to the fuel pressure test
connector.
2. Stop the engine for approx. 30 minutes and then check the
fuel pressure changes.
Fuel pressure
drops slowly
·Fuel leakage at the
injector
• Faulty fuel pressure
regulator's
diaphragm and O-
ring.
Fuel pressure
drops rapidly• Faulty check valve
in the fuel pump.
Possible Cause Pressure Change
Fuel Pressure(bar) 2.5
Discharging the pressure in fuel system
1. Remove the fuel pressure test connector.
Installation Notice
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.
Tightening Torque
22.5 - 27.5 Nm

M161 ENGINE CONTROLS 1F2-55
Removal & Installation Procedure
1. Remove the O-ring.
Check for damage and replace it if necessary.
2. Remove the injector bracket from the injector.
Installation Notice
Exactly seat the anti-twist lock into the square groove in
injector.
3. Separate the injector from the fuel distributor.
Inspection & Maintenance
Inspection of the Injector operation and spray pattern
1. Connect the contact box to the ECU.
2. Connect the shop made test plug to the injector and place
it into the tank.
3. Position the ignition switch to ON.
4. Connect the pin 63(+) and 69(-) of the contact box with a
test cable.
5. Check the injector spray pattern.
Notice
Replace the injector if the injector spray pattern is abnormal
or the fuel doesn't inject.
Injector Resistance Inspection
1. Remove the injector connector.
2. Measure the injector coil resistance using a resistance
tester.
Notice
Replace the injector if the measured values is out of the
specified values. Check the connector and wire connection
between the ECU and the injector if the measured values
are normal.
Specified Value
14 - 17 W