Mitsubishi Montero Sport (2004+). Manual — part 294
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-589
STEP 2. Measure the sensor output voltage at fuel tank
differential pressure sensor connector E- 28.
(1) Disconnect hose E from the evaporative emission canister
side, and plug the hose.
(2) Remove the fuel tank mounting nuts, tilt the fuel tank.
(3) Disconnect fuel tank differential pressure sensor connector
E-28.
(4) Connect special tool MB991658 between pressure sensor
connector terminal 1, 2 and 3.
(5) Turn the ignition switch to the "ON" position.
(6) Remove the fuel cap.
(7) Measure the voltage between terminal 1 and ground.
• The measured voltage should measure between 2.0
and 3.0 volts.
(8) Turn the ignition switch to the "LOCK" (OFF) position.
(9) Disconnect the evaporative emission system pressure
pump, and reinstall the fuel cap.
(10)Connect hose E to the canister.
Q: Is the measured voltage between 2.0 and 3.0 volts?
YES : Go to Step 7 .
NO : Go to Step 3 .
AC005140
HOSE E
AC
AC002614
CONNECTOR: E-28
FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR
AH
E-28 (B)
2 1
3
E-28 HARNESS SIDE
CONNECTOR
AC002081AB
MB991658
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-590
STEP 3. Measure the 5-volt supply circuit voltage at fuel
tank differential pressure sensor connector E-28.
(1) Disconnect fuel tank differential pressure sensor connector
E-28.
(2) Connect special tool MB991658 between pressure sensor
connector terminal 1, 2 and 3.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal 3 and ground.
• Voltage should measure between 4.7 and 5.1 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.7 and 5.1 volts?
YES : Go to Step 4 .
NO : Go to Step 10 .
STEP 4. Measure the ground circuit voltage at fuel tank
differential pressure sensor connector E-28.
(1) Disconnect fuel tank differential pressure sensor connector
E-28.
(2) Connect special tool MB991658 to connect terminal 3 of the
disconnected sensor connector and those of the harness
side connector respectively.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage at the fuel tank differential pressure
sensor side connector between terminal 2 and ground.
• Voltage should measure 0.5 volt or less.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?
YES : Go to Step 5 .
NO : Go to Step 12 .
AC002614
CONNECTOR: E-28
FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR
AH
E-28 (B)
2 1
3
E-28 HARNESS SIDE
CONNECTOR
AC002081AB
MB991658
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
AC002614
CONNECTOR: E-28
FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR
AH
E-28 (B)
2 1
3
E-28 HARNESS SIDE
CONNECTOR
AC002081AB
MB991658
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-591
STEP 5. Check connectors E-44, C-16, C-71 at intermediate
connector and C-90 at PCM and E-28 at fuel tank
differential pressure sensor for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
AC203242 AC
CONNECTOR: E-44
E-44
E-44 MALE SIDE CONNECTOR
20
19
7
16
6
17
15
5
14
18
8
4
11
3
12
2
9
1
10
13
AC203236 AC
CONNECTOR: C-16
C-16
22
2021
10
9
8
1718
6 7
19
1415
4 5
1112
1 2 3
13
16
C-16 MALE SIDE
CONNECTOR
AC203241
CONNECTOR: C-71
AD
C-71
9 10
8
6 7
31 32
30
29
18 19 20 21
5
4
2
1
3
27
26
24
23
25
12 13 14 15 16 17
28
11
22
33
C-71 JOINT CONNECTOR
AC002614
CONNECTOR: E-28
FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR
AH
E-28 (B)
2 1
3
E-28 HARNESS SIDE
CONNECTOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-592
Q: Are the connectors in good condition?
YES : Go to Step 6 .
NO : Repair or replace the damaged components. (Refer to
GROUP 00E, Harness Connector Inspection
PCM
60
46
66
57
45
44
64
55 56
65
62 63
52 53
5051
61
42
59
48
41
47
58
43
49
54
AC202313
C-90 (GR)
AC
CONNECTOR: C-90
C-90 (GR)
C-90 HARNESS SIDE CONNECTOR
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