Mitsubishi Montero Sport (2004+). Manual — part 163
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-65
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
STEP 1. Using scan tool MB991958, check data list item 95:
Manifold Absolute Pressure Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item
95, Manifold Absolute Pressure Sensor.
• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).
• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).
• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0
in.Hg).
• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9
in.Hg).
(4) Start the engine.
• When the engine is idling, 16 − 36 kPa (4.7 − 10.6
in.Hg).
• When the engine is suddenly revved, manifold absolute
pressure increases.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Go to Step 2.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-66
STEP 2. Measure the sensor output voltage at manifold
absolute pressure sensor connector A-12 by backprobing.
(1) Do not disconnect the connector A-12.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground by
backprobing.
• When altitude is 0 m (0 foot), voltage should be 3.8and
4.2 volts.
• When altitude is 600 m (1,969 feet), voltage should be
3.5 and 3.9 volts.
• When altitude is 1,200 m (3,937 feet), voltage should be
3.3 and 3.7 volts.
• When altitude is 1,800 m (5,906 feet), voltage should be
3.0 and 3.4 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 3.
NO : Go to Step 7.
AK200034
2 1
3
AB
CONNECTOR: A-12
A-12(B)
HARNESS
CONNECTOR:
COMPONENT
SIDE
3
2
1
AK203034
A-12 HARNESS
CONNECTOR:
HARNESS SIDE
AF
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-67
STEP 3. Measure the sensor output voltage at PCM
connector C-91 by backprobing.
(1) Do not disconnect the connector C-91.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 91 and ground.
• When altitude is 0 m (0 foot), voltage should be 3.8 and
4.2 volts.
• When altitude is 600 m (1,969 feet), voltage should be
3.5 and 3.9 volts.
• When altitude is 1,200 m (3,937 feet), voltage should be
3.3 and 3.7 volts.
• When altitude is 1,800 m (5,906 feet), voltage should be
3.0 and 3.4 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 4.
NO : Go to Step 6.
AK104028
98
78
71
88
89
76
77
72
79
91
73
80
74
75
81
92
82
83
93
84
85
94
86
87
95
96
90
97
AB
CONNECTOR: C-91
C-91(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300867
7172 73 74
75 76 77
78 79 80 81 82 83 84 85 86 87 88 89
90 91
92 93 94
95 96
97 98
C-91 HARNESS
CONNECTOR:
HARNESS SIDE
AE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-68
STEP 4. Check connector A-12 at the manifold absolute
pressure sensor and connector C-91 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 18.
AK200034
2 1
3
AB
CONNECTOR: A-12
A-12(B)
HARNESS
CONNECTOR:
COMPONENT
SIDE
AK104028
98
78
71
88
89
76
77
72
79
91
73
80
74
75
81
92
82
83
93
84
85
94
86
87
95
96
90
97
AB
CONNECTOR: C-91
C-91(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст