Mitsubishi Galant 9G. Manual — part 427

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-46

GENERATOR DRIVE BELT TENSION CHECK
<3.8L ENGINE>

.

WHEN USING SCAN TOOL MB991958

Required Special Tools:

• MB991668: Belt Tension Meter Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991910: MUT-III Main Harness A

CAUTION

To prevent damage to scan tool MB991824, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991824.
1. Connect special tool MB991668 to scan tool MB991824.
2. Connect scan tool MB991910 to scan tool MB991824.
3. Connect scan tool MB991910 to the data link connector.
4. Turn the ignition switch to the "ON" position and select "Belt

Tension" from the menu scan tool MB991824 screen.

AC302077
AC305412

AC306958AB

MB991824

MB991910

MB991668

DATA LINK

CONNECTOR

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-47

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. 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).

6. 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:

NOTE: Because the frequency depends on the belt material,
confirm Part No. shown on the reverse of the belt.

.

Part No.

Vibration frequency Hz

MD368275

133

− 158

MN158101, MN187016

143

− 169

AK303692AB

15˚ 15˚

MB991668
(MICROPHONE)

10 – 20mm
(0.4 – 0.8in)

AIR
CCONDITIONING
COMPRESSOR
PULLEY

GENERATOR
PULLEY

TENSIONER
PULLEY

CRANK
SHAFT
PULLEY

TAP LIGHTLY
WITH A FINGER

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-48

WHEN USING THE TENSION GAUGE

Use a belt tension gauge to check that the belt tension is within
the standard value.

Standard value: 490

− 686 N (110 − 154 lb)

.

BELT DEFLECTION CHECK

Apply approximately 98 N (22 lb) 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: 8.4

− 10.7 mm (0.33 − 0.42 in)

AK303693AB

TENSION
GAUGE

AIR
CCONDITIONING
COMPRESSOR
PULLEY

GENERATOR
PULLEY

TENSIONER
PULLEY

CRANK
SHAFT
PULLEY

AK303694AB

AIR
CCONDITIONING
COMPRESSOR
PULLEY

GENERATOR
PULLEY

TENSIONER
PULLEY

CRANK
SHAFT
PULLEY

APPROXIMATELY
98 N (22 lb)

MAINTENANCE SERVICE

TSB Revision

GENERAL

00-49

GENERATOR DRIVE BELT TENSION
ADJUSTMENT

.

1. Loosen the tensioner pulley fixing nut.
2. With the tensioner pulley fixing nut temporarily tightened to

15

± 5 N⋅m (11 ± 4 ft-lb), set the belt tension or defection

amount to the standard value using the adjusting bolt.

Standard value:

3. Tighten the tension pulley fixing nut.

Tightening torque: 49

± 10 N⋅m (36 ± 7 ft-lb)

POWER STEERING DRIVE BELT TENSION
CHECK

.

WHEN USING SCAN TOOL MB991958

Required Special Tools:

• MB991668: Belt Tension Meter Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991910: MUT-III Main Harness A

Gently tap the middle of the belt between the pulleys (the loca-
tion 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.
NOTE: Refer to

P.00-46

for details on the method of measuring

the vibration frequency using the scan tool.

Standard value:

.

ITEMS

DURING
ADJUSTMENT

DURING
REPLACEMENT

Vibration
frequency Hz

150

− 163

180

− 202

Tension N (lb)

539

− 637

(121

− 143)

785

− 981

(176

− 221)

Deflection
(Reference value)
mm (in)

8.9

− 10.1

(0.35

− 0.40)

6.2

− 7.5

(0.24

− 0.30)

AK303695

TENSIONER
PULLEY

FIXING
NUT

ADJUSTING BOLT

AB

ITEM

WHEN
CHECKED

DURING
ADJUSTME
NT

DURING
REPLACEM
ENT

Vibration
frequency Hz

124

− 160

134

− 151

160

− 189

AC210247

15˚

15˚

MB991668
(MICROPHONE)

10 - 20 mm
(0.4 - 0.8 in)

TAP LIGHTLY
WITH A FINGER

POWER STEERING
OIL PUMP PULLEY

AB