Mitsubishi Eclipse. Manual — part 726

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-47

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.
1. Connect special tool MB991668 to the scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Turn the ignition switch to the "ON" and select scan tool

MB991958 "Belt Tension Measurement" from the menu
screen.

4. Hold special tool MB991668 (microphone) to the middle of

the drive belt between the pulleys (at the place indicated by
the arrow), about 10

− 20 mm (0.4 − 0.8 inch) away from the

rear surface of the belt and so that it is perpendicular to the
belt (within an angle of

± 15 degree angle).

CAUTION

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

close as possible to underhood temperature.

• Do not let any contaminants such as water or oil 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. 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:

ITEM

2.4L ENGINE

3.0L ENGINE

Vibration frequency
Hz

189

− 232

142

− 168

AC303127

AB

MB991911

16-PIN

MB991827

MB991824

AKX01149AB

<2.4L ENGINE>

15˚

15˚

MB991668
(MICROP-
HONE)

10 – 20mm
(0.4 – 0.8in)

WATER
PUMP
PULLEY

CRANK
SHAFT
PULLEY

GENERATOR
PULLEY

TAP LIGHTLY
WITH A FINGER

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-48

.

AKX01150 AB

<3.0L ENGINE>

15˚ 15˚

MB991668
(MICROPHONE)

10 – 20mm
(0.4 – 0.8in)

IDLER
PULLEY

A/C COM-
PRESSOR
PULLEY

GENERATOR
PULLEY

TENSIONER
PULLEY

CRANK
SHAFT
PULLEY

TAP LIGHTLY
WITH A FINGER

AKX01150

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-49

<When using the tension gauge>
Use a belt tension gauge to check that the belt tension is within
the standard value.

Standard value:

.

ITEM

2.4L ENGINE

3.0L ENGINE

Tension N (lb)

392

− 588

(88

− 132)

490

− 686

(110

− 154)

AKX01151

AKX01151AB

TENSION GAUGE

WATER PUMP
PULLEY

CRANK-
SHAFT
PULLEY

GENERATOR
PULLEY

<2.4L ENGINE>

AKX01152

AKX01152 AB

IDLER
PULLEY

A/C COM-
PRESSOR
PULLEY

GENERATOR
PULLEY

CRANK
SHAFT
PULLEY

TENSION
GAUGE

TENSIONER
PULLEY

<3.0L ENGINE>

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-50

<Belt deflection check>
Apply 98 N (22 pound) of force to the middle of the drive belt
between the pulleys (at the place indicated by the arrow) and
check that the amount of deflection in within the standard
value.

Standard value:

GENERATOR DRIVE BELT TENSION
ADJUSTMENT

.

<2.4L ENGINE>
1. Loosen the nut of the generator pivot bolt.
2. Loosen the lock bolt.
3. Turn the adjusting bolt to adjust the belt vibration frequency,

belt tension or deflection to the standard value.

Standard value:

ITEM

2.4L ENGINE

3.0L ENGINE

Deflection (Reference
value) mm (in)

6.7

− 9.0

(0.26

− 0.35)

8.5

− 10.9

(0.33

− 0.43)

AKX01153

AKX01153 AB

<2.4L ENGINE>

WATER PUMP
PULLEY

GENERATOR
PULLEY

CRANK-
SHAFT
PULLEY

98 N (22 lb)

AKX01154

AKX01154 AB

<3.0L ENGINE>

IDLER
PULLEY

A/C COM-
PRESSOR
PULLEY

GENERATOR
PULLEY

TENSIONER
PULLEY

CRANK
SHAFT
PULLEY

98 N (22 lb)

AKX01155

AKX01155 AB

ADJUSTING
BOLT

LOCK BOLT

PIVOT BOLT

<2.4L ENGINE>