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: 

.

œ

The ignition timing may fluctuate within 

–

 7

•

 

BTDC. This is normal.

œ

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: 

.

œ

The idle speed is controlled automatically by 
the idle speed control system.

œ

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 

3

13A



, 

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

œ

Diagnosis output

œ

Fuel pressure

œ

Injector

œ

Ignition coil, spark plug cable, spark plug

œ

EGR control system

œ

Evaporative emission control system

œ

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

œ

Keep away from the spark plug hole when 
cranking.

œ

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: 

.

œ

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.

œ

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 

3

11B



). If not improved, 

go to step 5.

5. Bleed air from the lash adjusters (Refer to 

3

11A





).

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 

3

11B



).

<LASH ADJUSTER AIR BLEEDING>

NOTE: 

.

œ

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.

œ

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.

œ

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: 

.

œ

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.

œ

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.

œ

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.

œ

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