Mitsubishi Montero Sport (2004+). Manual — part 327
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-721
STEP 2. Check for open circuit, short circuit to ground and
harness damage between data link connector C-69
(terminal No. 1) and PCM connector C-91 (terminal No. 84).
NOTE: Check harness after checking intermediate connectors
C-10 and C-16. If intermediate connector C-10 and C-16 are
damaged, repair or replace them. Refer to GROUP 00E, Har-
ness Connector Inspection
. Then check that the mal-
function is eliminated.
Q: Is the harness wire in good condition?
YES : Go to Step 3.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK302269
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
CONNECTOR: C-69
C-69(B)
HARNESS
CONNECTOR:
COMPONENT
SIDE
AB
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-722
STEP 3. Check for open circuit, short circuit to ground and
harness damage between data link connector C-69
(terminal No. 7) and PCM connector C-91 (terminal No. 85).
NOTE: Check harness after checking intermediate connectors
C-10 and C-16. If intermediate connector C-10 and C-16 are
damaged, repair or replace them. Refer to GROUP 00E, Har-
ness Connector Inspection
. Then check that the mal-
function is eliminated.
Q: Is the harness wire in good condition?
YES : Refer to, INSPECTION PROCEDURE 28
− Power
Supply System and Ignition Switch-IG System
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK302269
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
CONNECTOR: C-69
C-69(B)
HARNESS
CONNECTOR:
COMPONENT
SIDE
AB
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-723
INSPECTION PROCEDURE 3: The Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check
Engine Lamp) Does Not Illuminate Right after the Ignition Switch Is Turned to the "ON" Position.
GREEN-
WHITE
AK302270
Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) Circuit
BL
ACK
-
WHITE
BL
ACK
-
WHITE
GREEN-
WHITE
9
23
22
8
4
2 3
4 5 6 7
8 9 10 11 12 13 14 15 16
1
D-06
D-06
D-08
JUNCTION
BLOCK
ST
LOCK
ACC
IG1
R
2
1
3
2
4
D-08
(MU801342)
1 2 3
4 5 6
D-15
IGNITION
SWITCH
22
21
23 24 25 26 27
28 29 30 31 32
C-04
Malfunction Indicator Lamp
(SERVICE ENGINE SOON or
Check Engine Lamp)
POWERTRAIN CONTROL
MODULE (PCM)
24
IG2
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 21 22
C-16
MU801461
10
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24
25
26 27 28 29
31 32 33
34 35
1
C-89
(MU803784)
10A
8
AK103912AD
CONNECTOR: C-04
C-04
AK103911AE
CONNECTOR: C-16
C-16
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-724
.
CIRCUIT OPERATION
• The malfunction indicator lamp (SERVICE
ENGINE SOON or Check Engine Lamp) power is
supplied from the ignition switch.
• The PCM controls the ground of the malfunction
indicator lamp (SERVICE ENGINE SOON or
Check Engine Lamp) by turning the power tran-
sistor in the PCM ON and OFF.
.
COMMENT
• The PCM causes the malfunction indicator lamp
(SERVICE ENGINE SOON or Check Engine
Lamp) to illuminate for 5 seconds immediately
after the ignition switch is turned to the "ON" posi-
tion occurred.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Burnt-out bulb.
• Defective malfunction indicator lamp (SERVICE
ENGINE SOON or Check Engine Lamp) circuit.
• Malfunction of the PCM.
AK103738AD
CONNECTOR: C-89
PCM
C-89(GR)
AK200036AC
CONNECTORS: D-06
JUNCTION BLOCK
(FRONT SIDE)
D-06
AK200035AB
CONNECTOR: D-08
D-08
JUNCTION BLOCK
(REAR SIDE)
AK200040AB
CONNECTOR: D-15
D-15(B)
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