Mitsubishi Outlander GS45X. Manual - part 757

 

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Mitsubishi Outlander GS45X. Manual - part 757

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-851

EXHAUST CAMSHAFT POSITION SENSOR AND 
CRANKSHAFT POSITION SENSOR

Required Special Tools:

• MB991709: Test Harness

• MB992110: Power Plant ECU Check Harness

.

Measurement Method 

1. Disconnect the exhaust camshaft position sensor connector, 

and connect the test harness special tool (MB991709) 
between the separated connector (All terminals should be 
connected).

2. Connect the oscilloscope probe to exhaust camshaft 

position sensor connector terminal No. 3.

3. Disconnect the crankshaft position sensor connector, and 

connect the test harness special tool (MB991709) between 
the separated connector.

4. Connect the oscilloscope probe to crankshaft position 

sensor connector terminal No. 3.

.

Alternate method 

1. Disconnect all ECM connectors. Connect the check harness 

special tool (MB992110) between the separated connectors.

AK604465

3

2

1

AE

Exhaust camshaft position
sensor connector

Oscilloscope

MB991709

AK704086

3

2

1

AB

Crankshaft position
sensor connector

Oscilloscope

MB991709

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2

1

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AK604467AB

Power plant ECU
check harness connector

MB992110

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-852

2. Connect the oscilloscope to check harness terminal No. 7. 

(Check the exhaust camshaft position sensor signal wave 
pattern.)

3. Connect the oscilloscope to check harness terminal No. 8. 

(Check the crankshaft position sensor signal wave pattern.)

Standard Wave Pattern

Wave Pattern Observation Points

• Verify that, toward the engine speed of 2,500 r/min, time dif-

ference T from when the crankshaft position sensor output 
wave falls to when the exhaust camshaft position sensor 
output wave falls becomes less.

.

Observation condition

Function

Special pattern

Pattern height

Low

Pattern selector

Display

Engine condition

Idle

AK704331

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2

1

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Oscilloscope

Power plant ECU
check harness connector

AB

AK704329

Crankshaft position
sensor output wave
pattern

Exhaust camshaft
position sensor
output wave pattern

2 engine revolutions (1 camshaft revolution)

(at retard angle)

(at advance angle)

phase angle

(Volt)

0

5

0

5

(ms)

T

Standard wave pattern

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-853

Examples of Abnormal Wave Patterns

Example 1
Cause of problem

• Sensor interface malfunction.

Wave pattern characteristics

• Rectangular wave pattern is output even when the 

engine is not started.

Example 2
Cause of problem

• Loose timing belt.

• Abnormality in sensor disc.

Wave pattern characteristics

• Wave pattern is displaced to the left or right.

INJECTOR

Required Special Tools:

• MB991658: Test Harness

• MB992110: Power Plant ECU Check Harness

.

Measurement Method

1. Disconnect the injector connector, and connect the test har-

ness special tool (MB991658) between the separated con-
nector. (All terminals should be connected.)

2. Connect the oscilloscope probe to injector connector termi-

nal No. 2.

AK604469 AB

AK604470

AB

AK604471

1 2

AB

Injector
connector

MB991658

Oscilloscope

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-854

Alternate method

1. Disconnect all ECM connectors. Connect the check har-

ness special tool (MB992110) between the separated con-
nectors.

2. Connect the oscilloscope probe to each check harness con-

nector terminal to analyze each cylinder:

• Terminal No. 2 for the number 1 cylinder.

• Terminal No. 3 for the number 2 cylinder.

• Terminal No. 18 for the number 3 cylinder.

• Terminal No. 19 for the number 4 cylinder.

Standard Wave Pattern

Observation conditions

Function

Special pattern

Pattern height

Variable

Variable knob

Adjust while viewing the 
wave pattern

Pattern selector

Display

Engine condition

Idle

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2

1

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AK604467AB

Power plant ECU
check harness connector

MB992110

AK704332

16 15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

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AB

Oscilloscope

Power plant ECU
check harness
connector

AK301250AF

(Volt)

50

0

Power 
voltage

Solenoid back 
electromotive force
(Approximately 7×10V)

Drive signal: ON

Drive signal: OFF

Point B
Injector drive
time

Point A.

Standard wave pattern

Time

 

 

 

 

 

 

 

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