Mitsubishi Montero (2004+). Manual — part 313
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-739
STEP 5. Check for harness damage between accelerator
pedal position sensor connector D-138 (terminal No. 1) and
PCM connector D-135 (terminal No. 91).
Q: Is the harness wire in good condition?
YES : Go to Step 6.
NO : Repair it. Then go to Step 11.
STEP 6. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2121 set?
YES : Replace the PCM. Then go to Step 11.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection. Service Points
.
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK302970
AB
MB991911
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-740
STEP 7. Check the accelerator pedal position switch.
(1) Disconnect the accelerator pedal position switch connector
D-138.
(2) Check the continuity between accelerator pedal position
switch side connector terminal No. 4 and No. 5.
Standard value:
Continuity (foot released from accelerator pedal)
Non-continuity (accelerator pedal depressed)
Q: Is the switch operating properly?
YES : Go to Step 8.
NO : Replace the accelerator pedal position sensor. Then
go to Step 11.
STEP 8. Check connector D-133 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
6 7 8
1 2 3 4 5
AK201453AB
ACCELERATOR PEDAL
POSITION SWITCH
SIDE CONNECTOR
AK200939
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AB
CONNECTOR: D-133
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-133(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-741
STEP 9. Check for short circuit to ground between
accelerator pedal position switch connector D-138
(terminal No. 4) and PCM connector D-133 (terminal No.
38).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 11.
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
AK200939
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AB
CONNECTOR: D-133
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-133(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-742
STEP 10. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2121 set?
YES : Replace the PCM. Then go to Step 11.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection. Service Points
.
STEP 11. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2121 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK302970
AB
MB991911
MB991824
MB991827
AK302970
AB
MB991911
MB991824
MB991827
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