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
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
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
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
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
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
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
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст