Mitsubishi Montero Sport (2004+). Manual — part 183
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-145
STEP 9. Check for open circuit and harness damage
between throttle position sensor connector A-41 (terminal
No. 1) and PCM connector C-90 (terminal No. 57).
NOTE: Check harness after checking intermediate connector
C-71. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection
.
Then go to Step 14.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.
AK000363
AK104024
CONNECTOR: A-41
AB
THROTTLE
POSITION
SENSOR
A-41(B)
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-146
STEP 10. Check connector C-90, C-91 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
STEP 11. Check for harness damage between throttle
position sensor connector A-41 (terminal No. 3) and PCM
connector C-91 (terminal No. 78).
Q: Is the harness wire in good condition?
YES : Go to Step 12.
NO : Repair it. Then go to Step 14.
AK104029
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
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
CONNECTORS: C-90, C-91
C-90(GR) C-91(GR)
C-90 HARNESS CONNECTOR:
COMPONENT SIDE
C-91 HARNESS CONNECTOR:
COMPONENT SIDE
AK000363
AK104027
4 3 2 1
CONNECTOR: A-41
AB
HARNESS CONNECTOR:
COMPONENT SIDE
A-41(B)
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-147
STEP 12. Check the incorrectly adjusted throttle position
sensor.
Refer to On-vehicle Service
− Throttle Position Sensor Adjust-
ment
Q: Is the output voltage normal?
YES : Go to Step 13.
NO : Adjust it. Then go to Step 14.
STEP 13. Using scan tool MB991958, check data list item
14: Throttle Position 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
14, Throttle Position Sensor.
• With the throttle valve in the idle position, voltage should
measure between 0.535 and 0.735 volt.
• With the throttle valve in the full-open position, voltage
should measure between 4.5 and 5.5 volts.
(4) 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 : Replace the PCM. Then go to Step 14.
STEP 14. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 6 −
Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0121 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-148
DTC P0122: Throttle Position Sensor Circuit Low Input
5V
GREEN-
YELL
OW
BL
ACK
GREEN-
WHITE
GREEN-
WHITE
BL
ACK
AK000443
Throttle Position Sensor (TPS) Circuit
POWERTRAIN CONTROL MODULE (PCM)
71
76
77
72 73 74
75
79 80
78
81
87 88
89
91
90
92
97
98
82
93
83
94
84 85
95
86
96
C-91
(MU803782)
1 2 3 4
A-41
(MU802724)
THROTTLE POSITION SENSOR
13
12
78
57
3
1
4
C-90
46
47
41
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58
59
60 61 62 63
64 65 66
C-90
(MU803781)
1
10
2 3 4 5 6 7 8 9
11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
C-71
AUTO-CRUISE CONTROL SYSTEM
C-91
JOINT
CONNEC-
TOR (4)
AK000363
AK104024
CONNECTOR: A-41
AB
THROTTLE
POSITION
SENSOR
A-41(B)
AK103738AE
CONNECTORS: C-90, C-91
PCM
C-91(GR)
C-90(GR)
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