Mitsubishi Montero (2004+). Manual — part 162
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-135
STEP 7. Check the continuity at engine coolant
temperature sensor harness side connector B-37.
(1) Disconnect the connector B-37 and measure at the harness
side.
(2) Check for the continuity between terminal No. 2 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 10.
NO : Go to Step 8.
STEP 8. Check connector D-135 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.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AK000235
B-37 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
AL
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)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-136
STEP 9. Check for open circuit between engine coolant
sensor connector B-37 (terminal No. 2) and PCM connector
D-135 (terminal No. 96).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 11.
NO : Repair it. Then go to Step 11.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
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)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-137
STEP 10. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor
connector B-37.
(2) Remove the engine coolant temperature sensor.
(3) With the temperature sensing portion of engine coolant
temperature sensor immersed in hot water, check
resistance.
Standard value:
14
− 17 kΩ [at −20°C (−4°F)]
5.1
− 6.5 kΩ [at 0°C (32°F)]
2.1
− 2.7 kΩ [at 20°C (68°F)]
0.9
− 1.3 kΩ [at 40°C (104°F)]
0.48
− 0.68 kΩ [at 60°C (140°F)]
0.26
− 0.36 kΩ [at 80°C (176°F)]
(4) Apply 3M
AAD part number 8731 or equivalent on the
screw section of the engine coolant temperature sensor.
(5) Install the engine coolant temperature sensor, and tighten
to the specified torque.
Tightening torque: 29
± 10 N⋅m (22 ± 7 ft-lb)
Q: Is the resistance at the standard value?
YES : Replace the PCM. Then go to Step 11.
NO : Replace the engine coolant temperature sensor. Then
go to Step 11.
STEP 11. 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 P0118 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AKX01622
AKX01623 AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-138
DTC P0122: Throttle Position Sensor (Main) Circuit Low Input
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the throttle
position sensor (main) power terminal (terminal
No. 2) from the PCM (terminal No. 106).
The ground terminal (terminal No. 4) is grounded
with PCM (terminal No. 105).
• When the throttle valve shaft is turned from the
idle position to the fully opened position, the
resistance between the throttle position sensor
(main) output terminal (terminal No. 1) and
ground terminal (terminal No. 4) will increase
according to the rotation.
.
AK201130
RED
WHITE
BLA
CK
B-05
5 V
106
2
THROTTLE
POSITION
SENSOR
(MAIN)
POWERTRAIN CONTROL MODULE (PCM)
115
105
1
4
Throttle Position Sensor (Main) Circuit
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
6
1 2 3 4 5
AK201173
THROTTLE
POSITION
SENSOR
AB
B-05(B)
CONNECTOR: B-05
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
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