Mitsubishi Lancer Evolution X. Manual - part 64

 

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Mitsubishi Lancer Evolution X. Manual - part 64

 

 

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-9

CAUTION

• The temperature of the surface of the belt should be as 

close to normal temperature as possible.

• Do not allow any contaminants such as water or oil to 

get onto the microphone.

• If strong gusts of wind blow against the microphone or 

if there are any loud sources of noise nearby, the val-
ues measured by the microphone may not correspond 
to actual values.

• If the microphone is touching the belt while the mea-

surement is being made, the values measured by the 
microphone may not correspond to actual values.

• Do not take the measurement while the vehicle's engine 

is running.

(5) Hold special tool MB992080 to the middle of the belt 

between the pulleys (at the place indicated by arrow) 
where it does not contact the belt (approximately 10 − 15 

mm (0.4 − 0.59 inch) away from the rear surface of the 

belt) so that it is perpendicular to the belt (within an angle 
of ± 15 degrees angle).

(6) Press the "MEASURE" button.
(7) Gently tap the middle of the belt between the pulleys (the 

place indicated by the arrow) with your finger as shown in 
the illustration, and check that the vibration frequency of 
the belt is within the standard value.

Standard value: 98  124 Hz

NOTE: To take the measurement repeatedly, tap the belt 
again.

(8) Press and hold the "POWER" button to turn off the power 

supply.

3. If not within the standard value, replace the auto-tensioner. 

(Refer to 

P.11A-66

).

.

AC607321

AD

MB992080

15˚

Gently tap with your finger

15˚

10 – 15 mm
(0.4 – 0.59 inch)

Generator
pulley

Idler pulley

Idler pulley

Crankshaft 
pulley

Power steering
oil pump pulley

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-10

<When using a tension gauge>

1. Check the tension of the drive belt. (Refer to 

P.11A-7

).

2. Use a belt tension gauge in the middle of the belt between 

the pulleys shown in the figure (at the place indicated by the 
arrow) to check that the belt tension is within the standard 
value.

Standard value: 248  400 N (56  90 lb)

3. If not within the standard value, replace the auto-tensioner. 

(Refer to 

P.11A-66

).

VALVE CLEARANCE CHECK AND ADJUSTMENT

M1111001501093

Refer to GROUP00, General − Maintenance service − Intake 

And Exhaust Valve Clearance (Inspect And Adjust)

IGNITION TIMING CHECK

M1111001702216

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A

1. Before inspection, 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 TC-SST)

NOTE: On vehicles for Canada, the headlight, taillight, etc. 
remain lit even when the lighting switch is in "OFF" position 
but this is no problem for checks.

AC506733

AD

Generator
pulley

Idler pulley

Idler pulley

Crankshaft 
pulley

Power steering
oil pump pulley

Belt 
tension 
gauge 

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-11

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 the timing light to the power supply line (terminal No. 4) 

of the ignition coil No. 1.

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 11".
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, 

refer to GROUP 13A, Multiport Fuel Injection (MFI) − 

Multiport Fuel Injection (MFI) Diagnosis − Symptom Chart 

P.13A-52

.

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. Cancel the setting mode of the scan tool MB991958.
10.Check that the actual ignition timing is at the standard value.

Standard value: Approximately 10°  BTDC

NOTE: Ignition timing fluctuates about 

±

 7

°

 Before Top Dead 

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

°

 to 

10

°

 Before Top Dead Center at higher altitudes.

NOTE: Wait till approximately 1 minute passes after the 
engine started, and check the ignition timing when the 
engine stabilized.

11.Remove the timing light.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

AK703277

M

1

2

3

4

AD

Power supply line
(terminal No. 4)

Equipment side
connector

No. 1 ignition coil

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-12

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.
12.Disconnect scan tool MB991958 from the data link 

connector.

CURB IDLE SPEED CHECK

M1111003502069

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A

1. Before inspection, 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 TC-SST)

NOTE: On vehicles for Canada, the headlight, taillight, etc. 
remain lit even when the lighting switch is in "OFF" position 
but this is no problem for checks.

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.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

 

 

 

 

 

 

 

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