Mitsubishi Montero Sport (2004+). Manual — part 531

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54-111

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check the speedometer operation.
Q: Does the speedometer work normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure 1

P.54-77

.

STEP 2. Check the engine coolant temperature sensor
signal circuit at the engine coolant temperature sensor
connector A-08 by backprobing.

(1) Do not disconnect the engine coolant temperature sensor

connector A-08.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 1 and ground by

backprobing.

The measured value should be approximately nine volts.

Q: Does the measured voltage correspond with this range?

YES : Go to Step 5.
NO : Go to Step 3.

AC201849

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CONNECTOR: A-08

AB

COMPONENT SIDE

A-08 (B)

ACX01788

AD

A-08 HARNESS CONNECTOR:
HARNESS SIDE

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54-112

STEP 3. Check engine coolant temperature sensor
connector A-08 (terminal No.1) and combination meter
connector C-05 (terminal No.2) for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.

Q: Are engine coolant temperature sensor connector A-08

(terminal No.1) and combination meter connector C-05
(terminal No.2) in good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. The engine coolant

temperature gauge should work normally.

AC201849

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CONNECTOR: A-08

AB

COMPONENT SIDE

A-08 (B)

AC2018743

3 2

6 5 4

7

8

9

1110

1

12

1413

CONNECTOR: C-05

C-05 HARNESS CONNECTOR

C-05

AC201843 AB

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54-113

STEP 4. Check the harness wires between engine coolant
temperature sensor connector A-08 (terminal No.1) and
combination meter connector C-05 (terminal No.2).

AC201849

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CONNECTOR: A-08

AB

COMPONENT SIDE

A-08 (B)

AC2018743

3 2

6 5 4

7

8

9

1110

1

12

1413

CONNECTOR: C-05

C-05 HARNESS CONNECTOR

C-05

AC201843 AB

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54-114

NOTE: After checking intermediate connector C-16, check the
wire. If intermediate connector C-16 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion

P.00E-2

.

Q: Are the harness wires between engine coolant

temperature sensor connector A-08 (terminal No.1) and
combination meter connector C-05 (terminal No.2) in
good condition?
YES : Repair or replace the combination meter

(printed-circuit board or engine coolant temperature
gauge assembly). The engine coolant temperature
gauge should work normally.

NO : Repair them. The engine coolant temperature gauge

should work normally.

STEP 5. Measure the engine coolant temperature gauge
unit.
(1) Drain the engine coolant. Refer to GROUP 00,

Maintenance Service

− Engine Coolant

P.00-51

.

(2) Remove the engine coolant temperature gauge unit.
(3) Immerse the unit in 78

° C (158°F) water to measure the

resistance.

• The measured value should be 104 ± 13.5 ohms.

Q: Does the measured resistance value correspond with

this range?
YES : Repair or replace the combination meter

(printed-circuit board or engine coolant temperature
gauge assembly). The engine coolant temperature
gauge should work normally.

NO : Replace the engine coolant temperature gauge unit.

The engine coolant temperature gauge should work
normally.

AC201845

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

CONNECTOR: C-16

AB

C-16

ACX01789

THERMOMETER

AC