Mitsubishi Montero (2002-2004). Manual — part 465

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-31

REMOVAL SERVICE POINT

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<<A>> STEERING LOCK CYLINDER REMOVAL
1. Insert the key in the steering lock cylinder and turn it to the

"ACC" position.

2. Using a small Phillips head screwdriver, pull the steering

lock cylinder toward you.

INSPECTION

M1543019501716

IGNITION SWITCH LESS CONINUITY CHECK

Disconnect ignition switch connector without removing the igni-
tion switch and steering lock cylinder. Then check the continu-
ity.

KEY REMINDER SWITCH CHECK

Disconnect key reminder switch connector without removing
the ignition switch and steering lock cylinder. Then check the
continuity.

IGNITION KEY RING ANTENNA CHECK

Check for continuity between terminal 3 and terminal 7.

Standard value: 2 ohms or less

ACX01628AB

LOCK PIN

SWITCH
POSITION

TESTER CONNECTION SPECIFIED

CONNECTION

"LOCK" (OFF) 1

− 2, 1 − 3, 1 − 4, 1 − 5,

1

− 6, 2 − 4, 2 − 5, 2 − 6,

4

− 5, 4 − 6

Open circuit

"ACC"

1

− 6

Less than 2 ohms

"ON"

1

− 2, 1 − 4, 1 − 6, 2 − 4,

2

− 6, 4 − 6

Less than 2 ohms

"START"

1

− 2, 1 − 4, 1 − 5, 2 − 4,

2

− 5, 4 − 5

Less than 2 ohms

ACX00769AB

STATUS OF
IGNITION KEY

TESTER
CONNECTION

SPECIFIED
CONNECTION

Removed

4

− 6

Less than 2 ohms

Inserted

4

− 6

Open circuit

ACX00770 AB

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-32

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED

SENSOR

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR
DIAGNOSIS

INTRODUCTION TO COMBINATION METER DIAGNOSIS

M1543009900992

All vehicles are equipped with an electrical speedom-
eter, tachometer, fuel and coolant temperature
gauges. The individual gauges are not replaceable. If
the gauges do not function correctly, there is most
likely a fault in the electrical system. All inputs, pow-
ers and grounds must be confirmed as correct before
the combination meter can be condemned.

TROUBLESHOOTING STRATEGY

M1543006900528

Use these steps to plan your diagnostic strategy. Fol-
low through with each step to ensure that you have
exhausted all possible methods of finding a combina-
tion meter fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find and repair the malfunction by following the

symptom chart.

4. Verify that the malfunction has been eliminated.

SYMPTOM CHART

M1543007200771

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE PAGE

Speedometer does not work.

1

P.54A-33

Tachometer does not work.

2

P.54A-38

Fuel gauge does not work.

3

P.54A-42

Engine coolant temperature gauge does not work.

4

P.54A-50

Combination meter does not work.

5

P.54A-55

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-33

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Speedometer does not Work.

Speedometer Circuit

AC204395

CONNECTOR : C-08

AJ

C-08(B)

AC204170

CONNECTOR : D-03

DC

D-03(GR)

COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR

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CHASSIS ELECTRICAL

54A-34

.

CIRCUIT OPERATION

• The ignition switch (IG1) circuit is the power sup-

ply for the speedometer and vehicle speed sen-
sor.

• The vehicle speed sensor is installed on the

transmission. Four pulses are generated with one
turn of the vehicle speed sensor shaft. These
pulse signals are sent into the PCM and sent into
the speedometer. The speedometer calculates
the pulse signals, and operates the indicator. At
the same time, the travel distance is calculated.

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TECHNICAL DESCRIPTION (COMMENT)
The cause may be a faulty vehicle speed sensor cir-
cuit system or a faulty speedometer. The vehicle
speed sensor is also used by the powertrain control
module (PCM), the auto-cruise control-ECU.

.

TROUBLESHOOTING HINTS

• Malfunction of the vehicle speed sensor

• Malfunction of the combination meter (printed-cir-

cuit board or speedometer and tachometer)

• Malfunction of the PCM

• Malfunction of the auto-cruise control-ECU

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Check the speedometer by observing the other
meters.
Check to see that the tachometer, fuel gauge and water ther-
mometer are operating normally.
Q: Do all other meters operate?

YES <other meters all operate> : Go to Step 2.
NO <one of the meters do not operate> : Refer to

INSPECTION PROCEDURE 5

P.54A-55

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AC204171

CONNECTOR : D-116

AI

AC204176

CONNECTORS : E-111, E-114

E-111

AL

E-114