Mitsubishi Montero Sport (2004+). Manual — part 297
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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-601
Q: Are the connectors in good condition?
YES : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
). Then go
to Step 16 .
NO : Repair or replace the damaged component. (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
AC002614
CONNECTOR: E-28
FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR
AH
E-28 (B)
2 1
3
E-28 HARNESS SIDE
CONNECTOR
![](/vehicles/winoney/fusey/lad/linct.png)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-602
STEP 14. Check connector C-90 at PCM for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are the connectors in good condition?
YES : Go to Step 15 .
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
![](/vehicles/winoney/fusey/lad/zofasss.png)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-603
STEP 15. Using scan tool MB991958, check data list item
73: Fuel Tank Differential 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) Disconnect hose E from the evaporative emission canister
side, and plug the hose.
(3) Turn the ignition switch to the "ON" position.
(4) Remove the fuel cap.
(5) Set scan tool MB991958 to the data reading mode.
• Item 73, Fuel Tank Differential Pressure Sensor.
• The fuel tank pressures reading on the scan tool
should be
−3.3 to 3.3 kPa (−0.97 to 0.97 inHg).
(6) Connect an evaporative emission system pressure pump to
the fuel filler neck and pressurize the fuel tank.
• The fuel tank pressure reading should increase.
(7) Turn the ignition switch to the "LOCK" (OFF) position. Then
disconnect scan tool MB991958.
(8) Disconnect the evaporative emission system pressure
pump, and reinstall the fuel cap.
(9) Connect hose E to the canister.
Q: Is the fuel tank pressure between
−3.3 and 3.3 kPa
(
−0.97 and 0.97 inHg)?
YES : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
). Then go
to Step 16 .
NO : Replace the PCM. Then go to Step 16 .
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AC005140
HOSE E
AC
ACX01358
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-604
STEP 16. Perform the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. (Refer to
).
(2) Read the DTC.
Q: Is DTC P0453 set?
YES : Return to Step 2 .
NO : The procedure is complete.
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