Mitsubishi Montero (2004+). Manual — part 156
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-111
STEP 5. Check the sensor supply voltage at PCM
connector D-135 by backprobing.
(1) Do not disconnect the PCM connector D-135.
(2) Disconnect the intake air temperature sensor connector
B-48.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal No. 99 and ground
by backprobing.
• Voltage should be between 4.5 and 4.9 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?
YES : Go to Step 6.
NO : Go to Step 7.
STEP 6. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between intake air temperature
sensor connector B-48 (terminal No. 6) and PCM
connector D-135 (terminal No. 99) because of open
circuit. Then go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK200947
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK201394
9192
939495
96979899
100101102103
104
105106
107108109
110111112
113114
115116117
118119120
D-135 HARNESS
CONNECTOR:
HARNESS SIDE
AB
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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-112
STEP 7. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Replace the PCM. Then go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
STEP 8. 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 : Replace the PCM. Then go to Step 11.
NO : Go to Step 9.
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK200937
3
4
5
1
2
6
7
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-113
STEP 9. Check connector D-134 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
STEP 10. Check for open circuit 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 11.
NO : Repair it. Then go to Step 11.
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CONNECTOR: D-134
AB
PCM
D-134(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK200937
3
4
5
1
2
6
7
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-48
B-48(B)
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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-114
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 P0113 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P0116: Engine Coolant Temperature Circuit Range/Performance Problem
YELLO
W
-GREEN
BLA
C
K
AK302923
ENGINE COOLANT
TEMPERATURE SENSOR
POWERTRAIN CONTROL MODULE(PCM)
5 V
98
2
B-37
(MU802406)
96
1
Engine Coolant Temperature Sensor Circuit
1 2
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
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