Mitsubishi Montero Sport (2004+). Manual — part 185
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI)
13A-153
STEP 5. Check for open circuit and short circuit to ground
between throttle position sensor connector A-41 (terminal
No. 4) and PCM connector C-90 (terminal No. 46).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 10.
NO : Repair it. Then go to Step 10.
AK000363
AK104027
4 3 2 1
CONNECTOR: A-41
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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
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MULTIPORT FUEL INJECTION (MFI)
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STEP 6. Check the throttle position sensor.
(1) Disconnect the connector A-41.
(2) Measure the resistance between throttle position sensor
side connector terminal No. 1 and No. 4.
Standard value: 3.5
− 6.5 kΩ
(3) Measure resistance between the throttle position sensor
side connector terminal No. 1 and No. 3.
(4) Move the throttle valve from the idle position to the full-open
position.
• Resistance should change smoothly in proportion to the
opening angle of the throttle valve.
Q: Is the resistance normal?
YES : Go to Step 7.
NO : Replace the throttle position sensor. Refer to Throttle
Body Assembly
− Disassembly and Assembly
STEP 7. Check connector C-90, C-91 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 10.
AK000363
AK104027
4 3 2 1
CONNECTOR: A-41
AB
HARNESS CONNECTOR:
COMPONENT SIDE
A-41(B)
AK000320
1 2 3 4
THROTTLE POSITION
SENSOR SIDE
CONNECTOR
AB
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
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STEP 8. Check for open circuit and short circuit to ground
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 9.
NO : Repair it. Then go to Step 10.
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
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MULTIPORT FUEL INJECTION (MFI)
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STEP 9. 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 10.
STEP 10. 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 P0122 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
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