Content .. 101 102 103 104 ..

Mitsubishi Eclipse. Manual - part 103

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL <2.4L>

11A-7

ON-VEHICLE SERVICE

DRIVE BELT TENSION CHECK AND
ADJUSTMENT

M1111003100106

Refer to GROUP 00, Maintenance Service

− Drive Belts

(Check Condition)

P.00-46

IGNITION TIMING CHECK

M1111001700447

Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.I.C.

• MB991827: USB Cable

• MB991911: Main Harness B

1. Before inspection, set vehicles in the following condition:

• Engine coolant temperature: 80 − 95°C (176 − 203°F)

• Lights and all accessories: OFF

• Transaxle: Neutral (P range on vehicles with A/T)

MB991654
Cylinder head bolt
wrench (12)

General service tool

Removal and installation of
cylinder head bolt

MD998738
Adjusting screw

General service tool

• Holding the

auto-tensioner

• Timing belt tension

adjustment

MD998767
Tensioner pulley socket
wrench

MD998752-01

Timing belt tension
adjustment

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

B991654

D998738

D998767

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL <2.4L>

11A-8

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Set up a timing light.
4. Start the engine and run it at idle.
5. Check that the idle speed is approximately 700 r/min.
6. Select scan tool MB991958 actuator test "item number 17."
7. Check that basic ignition timing is within the standard value.

Standard value: 5

° BTDC ± 3°

8. If the basic ignition timing is not within the standard value,

check the following items:

• Diagnostic output

• Timing belt cover and crankshaft position sensor installation

conditions

• Crankshaft sensing blade condition

CAUTION

If the actuator test is not canceled, the forced drive will
continue for 27 minutes. Driving in this state could lead to
engine failure.
9. Press the clear key on scan tool MB991958 (select forced

drive stop mode), and cancel the actuator test.

10.Check that the actual ignition timing is at the standard value.

Standard value: Approximately 10

° BTDC

NOTE: Ignition timing fluctuates about

Before Top Dead

Center, even under normal operating condition.
NOTE: It is automatically further advanced by about 5

Before Top Dead Center at higher altitudes.

IDLE MIXTURE CHECK

M1111002100266

Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.I.C.

• MB991827: USB Cable

• MB991911: Main Harness B

1. Before inspection, set vehicles in the following condition:

• Engine coolant temperature: 80 − 95°C (176 − 203°F)

• Lights and all accessories: OFF

• Transaxle: Neutral (P range on vehicles with A/T)

AK301853

MB991911

16-PIN

MB991827

MB991824

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL <2.4L>

11A-9

CAUTION

value.

Standard value: 5

° BTDC ± 3°

4. Start the engine and increase the engine speed to 2,500

r/min for 2 minutes.

5. Set the CO, HC tester.
6. Check the CO contents and the HC contents at idle.

Standard value:

CO contents: 0.5 % or less
HC contents: 100 ppm or less

7. If the CO and HC contents do not remain inside the standard

value, check the following items:
NOTE: Replace the catalytic converter when the CO and HC
contents do not remain inside the standard value, even
though the result of the inspection is normal for all items.

• Diagnostic output

• Closed-loop control (When the closed-loop control is carried

out normally, the output signal of the heated oxygen sensor
changes between 0

− 400 mV and 600 − 1,000 mV at idle.)

• Fuel pressures

• Injector

• Ignition coil, spark plug cable, spark plug

• EGR system and EGR valve leak

• Evaporative emission system

• Compression pressure

CURB IDLE SPEED CHECK

M1111003500513

Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.I.C.

• MB991827: USB Cable

• MB991911: Main Harness B

1. Before inspection and adjustment set vehicles in the

following condition.

• Engine coolant temperature: 80 − 95°C (176 − 203°F)

• Lights and all accessories: OFF

• Transaxle: Neutral (P range on vehicles with A/T)

AK301853

MB991911

16-PIN

MB991827

MB991824

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL <2.4L>

11A-10

CAUTION

Standard value: 5

° BTDC ± 3°

4. Start the engine.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select item number 22 and take a

reading of the idle speed.

Curb idle speed: 700

± 100 r/min

NOTE: The idle speed is controlled automatically by the idle
air control system.

7. If the idle speed is outside the standard value, refer to

GROUP 13A, Multiport Fuel Injection (MFI) <2.4L>

−

Multiport Fuel Injection (MFI) Diagnosis

− Symptom Chart

P.13A-28

COMPRESSION PRESSURE CHECK

M1111002600528

1. Before inspection, check that the engine oil, starter and

battery are normal. Also, set the vehicle in the following
condition:

• Engine coolant temperature: 80 − 95°C (176 − 203°F)

• Lights and all accessories: OFF

• Transaxle: Neutral (P range on vehicles with A/T)

2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor connector.

NOTE: Doing this will prevent the engine control module
from carrying out ignition and fuel injection.

WARNING

Keep your distance from the spark plug hole when
cranking. Oil, fuel, etc., may spray out from the spark
plug hole and may cause serious injury.

5. Cover the spark plug hole with a shop towel etc., during

cranking. After the engine has been cranked, check for
foreign material adhering to the shop towel.

AK301853

MB991911

16-PIN

MB991827

MB991824

AK301784

CRANKSHAFT POSITION
SENSOR CONNECTOR

Content .. 101 102 103 104 ..