Mitsubishi Outlander (2003+). Manual — part 8
ON-VEHICLE SERVICE
ENGINE MECHANICAL
11A-9
CAUTION
If the test is not cancelled, a forced driving will
continue for 27 minutes. Driving under this
condition may damage the engine.
9. Press the MUT-II clear key (Select a forced driving
cancel mode) to release the Actuator test.
10.Check that ignition timing is at the standard value.
Standard value: approximately 10
BTDC
NOTE:
.
The ignition timing may fluctuate within
7
BTDC. This is normal.
In higher altitude, the ignition timing is more
advanced than the standard value by
approximately 5
.
11.Remove the timing light.
12.Turn off the ignition switch and then remove the
MUT-II.
IDLE SPEED CHECK
M1111003500472
1. Before inspection, set the vehicle to the pre-
inspection condition.
2. Turn the ignition switch to "LOCK" (OFF) position.
3. Connect the MUT-II to the diagnosis connector or
connect a tachometer to the engine speed
detection connector.
4. Connect a timing light.
5. Start the engine and let it run at idle.
6. Check that ignition timing is at the standard value.
Standard value: approximately 10
BTDC
7. Check the idle speed.
Standard value: 750
100 r/min
NOTE:
.
The idle speed is controlled automatically by
the idle speed control system.
When using the MUT-II, select item No. 22 and
take a reading of the idle speed.
8. If the idle speed is outside the standard value,
inspect the MPI system (Refer to
,
GROUP 13A
-
Troubleshooting
-
Inspection chart
for diagnosis code).
IDLE MIXTURE CHECK
M1111002100255
1. Before inspection, set the vehicle to the pre-
inspection condition.
2. Turn the ignition switch to "LOCK" (OFF) position.
3. Connect the MUT-II to the diagnosis connector or
connect a tachometer to the engine speed
detection connector.
4. Connect a timing light.
5. Start the engine and let it run at idle.
6. Check that ignition timing is at the standard value.
Standard value: approximately 10
BTDC
7. Run the engine at 2,500 r/min for 2 minutes.
8. Set the CO, HC tester.
9. Check the CO contents and the HC contents at
idle.
Standard value
CO contents: 0.5 % or less
HC contents: 100 ppm or less
10.If there is a deviation from the standard value,
check the following items:
AC102022
Y0195AU
AK000871
MUT-II
AC
AK000899
Engine speed
ditection connector
AC
AC102022
Y0195AU
AK000871
MUT-II
AC
AK000899
Engine speed
ditection connector
AC
ON-VEHICLE SERVICE
ENGINE MECHANICAL
11A-10
Diagnosis output
Fuel pressure
Injector
Ignition coil, spark plug cable, spark plug
EGR control system
Evaporative emission control system
Compression pressure
NOTE: Replace the three way catalyst when the
CO and HC contents are not within the standard
value, even though the result of the inspection is
normal on all items.
COMPRESSION PRESSURE CHECK
M1111002600465
1. Before inspection, set the vehicle to the pre-
inspection condition.
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crank angle sensor connector.
NOTE: Doing this will prevent the engine-ECU<M/
T> or engine-A/T-ECU<A/T> from carrying out
ignition and fuel injection.
CAUTION
Keep away from the spark plug hole when
cranking.
If compression is measured with water, oil,
fuel, etc., that has come from cracks inside
the cylinder, these materials will become
heated and will gush out from the spark plug
hole, which is dangerous.
5. Cover the spark plug hole with a shop towel etc.,
and after the engine has been cranked, check that
no foreign material is adhering to the shop towel.
6. Set compression gauge to one of the spark plug
holes.
7. Crank the engine with the throttle valve fully open
and measure the compression pressure.
Standard value (at engine speed of 250 r/
min):
1,370 kPa
Limit (at engine speed of 250 r/min):
Minimum 930 kPa
8. Measure the compression pressure for all the
cylinders, and check that the pressure differences
of the cylinders are below the limit.
Limit: Maximum 98 kPa
9. If there is a cylinder with compression or a
compression difference that is outside the limit,
pour a small amount of engine oil through the
spark plug hole, and repeat the operations in
steps from (6) to (8).
(1) If the compression increases after oil is added,
the cause of the malfunction is a worn or
damaged piston ring and/or cylinder inner
surface.
(2) If the compression dose not rise after oil is
added, the cause is a burnt or defective valve
seat, or pressure is leaking from the gasket.
10.Connect the crank angle sensor connector.
11.Install the spark plugs and spark plug cables.
12.Use the MUT-II to erase the diagnosis codes.
NOTE: This will erase the diagnosis code
resulting from the crank angle sensor connector
being disconnected.
MANIFOLD VACUUM CHECK
M1111002700417
1. Before inspection, set the vehicle to the pre-
inspection condition.
2. Turn the ignition switch to "LOCK" (OFF) position.
3. Connect a tachometer or connect the MUT-II to
the diagnosis connector.
AK201364AC
Crank angle
sensor
connector
AC102022
Y0195AU
AK000871
MUT-II
AC
AK201369AB
Fuel pressure
regulator
Vacuum
gauge
ON-VEHICLE SERVICE
ENGINE MECHANICAL
11A-11
4. Attach a three-way joint to the vacuum hose
between the fuel pressure regurator and the air
intake plenum, and connect a vacuum gauge.
5. Start the engine and check that idle speed is
within the standard valve.
Standard value: 750
100 r/min
6. Check the intake manifold vacuum.
Limit: Minimum 60 kPa
7. Turn off the ignition switch.
8. Remove the vacuum gauge and the three-way
joint, and then connect the vacuum hose.
9. Remove the engine tachometer or the MUT-II.
LASH ADJUSTER CHECK
M1111002900336
If an abnormal noise (knocking) that seems to be
coming from the lash adjuster is heard after starting
the engine and dose not stop, carry out the following
check.
NOTE:
.
The abnormal noise which is caused by a
problem with the lash adjusters is generated after
the engine is started, and will vary according to
the engine speed. However, this noise is not
related to the actual engine load.
Because of this, if the noise dose not occur
immediately after the engine is started, if it dose
not change in accordance with the engine speed,
or if it changes in accordance with the engine
load, the source of the noise is not the lash
adjusters.
If there is a problem with the lash adjusters, the
noise will almost never disappear, even if the
engine has been run at idle to let it warm up.
The only case where the noise might disappear is if
the oil in the engine has not been looked after
properly and oil sludge has caused the lash
adjusters to stick.
1. Start the engine.
2. Check that the noise occurs immediately after the
engine is started, and that the noise changes in
accordance with changes in the engine speed.
If the noise dose not occur immediately after the
engine is started, or if it dose not change in
accordance with the engine speed, the problem is
not being caused by the lash adjusters, so check
for some other cause of the problem. Moreover, if
the noise dose not change in accordance with the
engine speed, the cause of the problem is
probably not with the engine (In these cases, the
lash adjusters are normal).
3. While the engine is idling, check that the noise
level does not change when the engine load is
varied (for example, by shifting from N to D).
If the noise level changes, the cause of the noise
is probably parts striking because of worn
crankshaft bearings or connecting rod bearings
(In such cases, the lash adjusters are normal).
4. After the engine has warmed up, run it at idle and
check if any noise can be heard.
If the noise has become smaller or disappeared,
oil sludge could make the lash adjusters stick.
Clean the lash adjusters (Refer to GROUP 11D
-
Rocker Arms and Camshaft
-
Rocker Arms and
Camshaft Inspection
). If not improved,
go to step 5.
5. Bleed air from the lash adjusters (Refer to
).
6. If the noise has not disappeared even after the air
bleeding, clean the lash adjusters (Refer to
GROUP 11D
-
Rocker Arms and Camshaft
-
Rocker Arms and Camshaft Inspection
<LASH ADJUSTER AIR BLEEDING>
NOTE:
.
If the vehicle is parked on a slope fir a long period
of time, the amount of oil inside the lash adjuster
will decrease, and air may get into the high
pressure chamber when starting the engine.
After parking the vehicle for long periods, the oil
drains out of the oil passage, and it takes time for
the oil to be supplied to the lash adjuster, so air
can get into the high-pressure chamber.
If either of the above situations occur, the
abnormal noise can be eliminated by bleeding
the air from inside the lash adjusters.
1. Check the engine oil and replenish or replace the
oil if necessary.
AKX00328
Good
Min.
Max
AE
ON-VEHICLE SERVICE
ENGINE MECHANICAL
11A-12
NOTE:
.
If there is an only small amount of oil, air will
be drawn in through the oil screen and will get
into the oil passage.
If the amount of oil is greater than normal, then
the oil will being mixed by the crankshaft and a
large amount of air may get mixed into the oil.
If the oil is degenerated, air and oil will not
separate easily in oil, and the amount of air
mixed into the oil will increase.
If the air which has been mixed in with the oil
due to any of the above reasons gets into the
high pressure chamber of the lash adjuster,
the air inside the high pressure chamber will
be compressed when the valve is open and
the lash adjuster will over-compress, resulting
in abnormal noise when the valve close. This
is the same effect as if the valve clearance is
adjusted to be too large by mistake. If the air
inside the lash adjusters is then released, the
operation of the lash adjusters will return to
normal.
2. Run the engine at idle for 1
-
3 minutes to let it
warm up.
3. With no load on the engine, repeat the drive
pattern shown in the illustration above and check
if the abnormal noise disappears (The noise
should normally disappear after 10
-
30
repetitions, but if there is no change in the noise
level after 30 repetitions or more, the problem is
probably not due to air inside the lash adjusters).
4. After the noise has disappeared, repeat the drive
pattern shown in the illustration above a further 5
times.
5. Run the engine at idle for 1
-
3 minutes and check
that the noise has disappeared.
AK100001
High-pressure chamber
AC
AKX00330
Gradually open
the throttle valve
Close the throttle valve
Approximately
3,000 r/min
Idle speed
Once
15 s
15 s
Drive pattern for air breeding
AE
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