Mitsubishi Montero (2002-2004). Manual — part 473

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-63

TACHOMETER CHECK

M1543001000304

1. Attach an external high quality tachometer to the engine

speed detection connector on the harness side (such as
with a paper clip).
NOTE: For tachometer check, use an external high quality
inductive tachometer.

2. Compare the readings of the vehicle tachometer and the

external tachometer at every engine speed, and check if the
variations are within the standard values.

Standard value:

FUEL LEVEL SENSOR CHECK

M1543001200290

Remove the fuel level sensor from fuel tank. (Refer to GROUP
13B, Fuel Tank

P.13B-11

.)

FUEL LEVEL SENSOR RESISTANCE

1. Check that resistance value between the fuel gauge terminal

and ground terminal is at the standard value when the fuel
level sensor float is between point

Standard value:

• Point "F": 3 − 10.1

• Point "E": 90 − 110

2. Check that resistance value changes smoothly when the

float moves slowly between point

3. If all checks are correct, go to fuel level sensor float height

check. If any check is not correct, replace the fuel level
sensor.

Engine speed (r/min)

Indication allowance of
tachometer r/min

700

600

− 800

2000

1900

− 2150

3000

2900

− 3225

4000

3875

− 4275

5000

4875

− 5325

6000

5875

− 6200

ACX00776 AB

TACHOMETER

ENGINE SPEED
DETECTION TERMINAL

PAPER CLIP

ACX01779 AC

POINT "F "

POINT "E "

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-64

FUEL LEVEL SENSOR FLOAT HEIGHT

1. Move the float and measure height A at point "F" (highest)

and B at point "E" (lowest).

Standard value:

• A: 11.9 mm (0.47 inch)

• B: 195.2 mm (7.69 inches)

2. Adjust the float arm to the standard value, then go to the

thermistor check.

THERMISTOR

CAUTION

After finishing this test, wipe the unit dry and install it in
the fuel tank.
1. Connect the fuel level sensor (thermistor) to the battery via a

test light (12 V

− 3.4 W). Immerse the thermistor in water.

2. Condition is good if the light goes off when the thermistor is

immersed in water and comes on when it is taken out of
water.

3. If all check result is correct, the fuel level sensor is OK. If

either check result is not correct, replace the fuel level
sensor.

ENGINE COOLANT TEMPERATURE GAUGE UNIT
CHECK

M1543001500280

1. Drain the engine coolant. (Refer to GROUP 00,

Maintenance Service

− Engine Coolant

P.00-44

.)

2. Remove the engine coolant temperature gauge unit.
3. Immerse the unit in 83

°C (181°F) water to measure the

resistance.

Standard value: 65.2

± 75.2 Ω

Reference value

4. If within the standard value, the sensor is OK. Reinstall it,

then check the engine coolant temperature gauge (Refer to

P.00-44

). If not within the standard value, replace it.

ACX01791AB

A

B

POINT "F"

POINT "E"

1

3

2

AC205525

GROUND

THERMISTOR

THERMISTOR

ILLUMINATED

NOT
ILLUMINATED

AB

Temperature

°C (°F)

Resistance

Ω

50 (122)

231

− 247

105 (221)

29.9

− 39.9

122 (252)

17.5

− 25.5

ACX00779AB

THERMOMETER

OHMMETER

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-65

5. Also check, apply the 3M

äAAD part number 8731,

Loctite

â242 or equivalent around the threads of the engine

coolant temperature gauge unit.

6. Add engine coolant. (Refer to GROUP 00, Maintenance

Service

− Engine Coolant

P.00-44

.)

REMOVAL AND INSTALLATION

M1543002900195

ACX00780 AB

16 ± 2 N·m
11 ± 1 ft-lb

ACX01266

ACX01792 AC

INSTRUMENT PANEL

SECT A - A

A

A

A

1

2

1

CLIP

A

3

COMBINATION METER REMOVAL
STEPS

1. METER BEZEL
2. COMBINATION METER

VEHICLE SPEED SENSOR
REMOVAL

3. VEHICLE SPEED SENSOR

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-66

INSPECTION

M1543019501783

VEHICLES SPEED SENSOR CHECK

1. Remove the vehicle speed sensor and connect a 3

− 10 kilo

ohms resistor as shown in the illustration.

2. Turn the shaft of the vehicle speed sensor and check that

there is voltage between terminals 2 and 3. (1 turn = 4
pulses)

3. If within the standard value, the vehicle speed sensor is OK.

If not within the standard value, replace the vehicle speed
sensor.

COMBINATION METER INTERNAL RESISTANCE
CHECK

Measure the resistance between terminals using an ohmmeter.

AC102349AB

TURN

SHAFT

RESISTOR
3 - 10

TERMINAL NO.
TO MEASURE
RESISTANCE

TERMINAL NAME

STANDARD
VALUE

25

− 67

Battery power supply and
ground

1 M

Ω or more

11

− 67

Battery power supply and
ground

1 M

Ω or more

25

− 62

IG power supply and
ground

1 M

Ω or more

11

− 62

IG power supply and
ground

1 M

Ω or more

63

− 67

Battery power supply and
fuel gauge

1 M

Ω or more

62

− 63

IG power supply and fuel
gauge

1 M

Ω or more

25

− 63

Fuel gauge and ground

180

Ω

11

− 63

Fuel gauge and ground

180

Ω

64

− 67

Battery power supply and
water temperature gauge

1 M

Ω or more

ACX00783

D-03

D-05

AB