Mitsubishi Montero (2004+). Manual — part 153
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-99
STEP 4. Check the continuity at intake air temperature
sensor harness side connector B-48.
(1) Disconnect the connector B-48 and measure at the harness
side.
(2) Check for the continuity between terminal No. 5 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check connector D-134 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
AK200937
3
4
5
1
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6
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AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-48
B-48(B)
AKX01409
1
2
3
4
5
6
7
B-48 HARNESS CONNECTOR:
COMPONENT SIDE
AL
AK201166
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85
86
87
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81
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88
89
CONNECTOR: D-134
AB
PCM
D-134(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-100
STEP 6. Check for open circuit and harness damage
between intake air temperature sensor connector B-48
(terminal No. 5) and PCM connector D-134 (terminal No.
88).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 9.
NO : Repair it. Then go to Step 9.
STEP 7. Check connector D-134 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 9.
AK200937
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4
5
1
2
6
7
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-48
B-48(B)
AK201166
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88
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CONNECTOR: D-134
AB
PCM
D-134(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK201166
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85
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81
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CONNECTOR: D-134
AB
PCM
D-134(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-101
STEP 8. Check for open circuit and harness damage
between intake air temperature sensor connector B-48
(terminal No. 6) and PCM connector D-135 (terminal No.
99).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 9.
NO : Repair it. Then go to Step 9.
STEP 9. 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 P0111 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK200937
3
4
5
1
2
6
7
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-48
B-48(B)
AK200947
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-102
DTC P0112: Intake air temperature Circuit Low Input
.
CIRCUIT OPERATION
• Approximately 5 volts are applied to the intake air
temperature sensor output terminal (terminal No.
6) from the PCM (terminal No. 99) via the resistor
in the PCM. The ground terminal (terminal No. 5)
is grounded with PCM (terminal No. 88).
• The intake air temperature sensor is a negative
temperature coefficient type of resistor. When the
intake air temperature rises, the resistance
decreases.
• The intake air temperature sensor output voltage
increases when the resistance increases and
decreases when the resistance decreases.
.
SKY B
U
LE
AK201128
RED-BLUE
INTAKE AIR TEMPERATURE SENSOR
(INCORPORATED IN VOLUME AIRFLOW
SENSOR)
POWERTRAIN CONTROL MODULE (PCM)
5 V
99
5
88
6
1 2 3 4 5 6 7
B-48
Intake Air Temperature Sensor Circuit
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
61
656667686970 717273
74757677787980 8182
8384
858687
8889
62
6364
D-134
(MU803804)
AK200940AC
CONNECTOR: B-48
INTAKE AIR
TEMPERATURE
SENSOR
B-48(B)
AK201038AK
CONNECTORS: D-134, D-135
PCM
D-134(GR) D-135(GR)
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