Mitsubishi Montero (2004+). Manual — part 342
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-855
STEP 3. Using scan tool MB991958, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to
Actuator Test Reference Table
a. Item 07: Fuel Pump.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?
YES : Go to Step 4.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 4. Using scan tool MB991958, check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List
Reference Table
a. Item 21: Engine Coolant Temperature Sensor.
b. Item 18: Cranking signal (ignition switch-ST)
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Go to Step 5.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 5. Inspection of throttle body (throttle valve area) for
dirtiness.
Q: Is the throttle valve area dirty?
YES : Refer to On-vehicle Service
− Clean the throttle valve
area
NO : Go to Step 6.
STEP 6. Check the ignition timing.
(1) Check the ignition timing at cranking.
Standard value: 5
° BTDC ± 3°
Q: Is the ignition timing normal?
YES : Go to Step 7.
AK302970
AB
MB991911
MB991824
MB991827
AK302970
AB
MB991911
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-856
NO : Check that the crankshaft position sensor and timing
belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.
STEP 7. Check the left bank injector.
(1) Disconnect the left bank injector connector B-11, B-33,
B-35.
(2) Measure the resistance between each injector side
connector terminal No. 1 and No. 2.
Standard value: 13
− 16 ohms [at 20°C (68°F)]
Q: Is the resistance between 13 and 16 ohms [at 20
°C
(68
°F)]?
YES : Go to Step 8.
NO : Replace the faulty injector. Then confirm that the
malfunction symptom is eliminated.
STEP 8. Check the right bank injector resistance at injector
intermediate connector B-44.
(1) Disconnect the injector intermediate connector B-44.
(2) Measure the resistance between each male connector side
terminal.
a. Measure the resistance between terminal No. 8 and No.
3 at No. 1 cylinder injector.
b. Measure the resistance between terminal No. 8 and No.
1 at No. 3 cylinder injector.
c. Measure the resistance between terminal No. 8 and No.
6 at No. 5 cylinder injector.
• Resistance should be between 13 and 16 ohms [at 20°C
(68
°F)].
AK201292
1
2
B-11(GR)
B-35(GR)
B-33(GR)
CONNECTORS: B-11, B-33, B-35
AB
HARNESS
CONNECTORS:
COMPONENT SIDE
AKX01414AB
INJECTOR SIDE
CONNECTOR
1 2
AK200949
3
4
7
8
1
2
5
6
B-44(B)
CONNECTOR: B-44
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01495
INJECTOR INTERMEDIATE
MALE SIDE CONNECTOR
1 2 3 4
5 6 7 8
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-857
Q: Is the measured resistance between 13 and 16 ohms [at
20
°C (68°F)]?
YES : Go to Step 11.
NO : Go to Step 9.
STEP 9. Check the right bank injector.
(1) Remove the intake manifold.
(2) Disconnect the right bank injector connector, which
deviates from the standard value at Step 8.
(3) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 13
− 16 ohms [at 20°C (68°F)]
Q: Is the measured resistance between 13
− 16 ohms [at
20
°C (68°F)]?
YES : Go to Step 10.
NO : Replace the injector. Then confirm that the
malfunction symptom is eliminated.
STEP 10. Check harness connector B-01 or B-02 or B-03 at
right bank injector for damage.
(1) Check the injector connector, which deviates from the
standard value at Step 9.
Q: Is the harness connector in good condition?
YES : Repair harness wire between injector intermediate
connector and right bank injector connector because
of harness damage. Then confirm that the
malfunction symptom is eliminated.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK200950
1
2
B-03(GR)
B-02(GR)
B-01(GR)
CONNECTORS: B-01, B-02, B-03
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01414AB
INJECTOR SIDE
CONNECTOR
1 2
AK200950
1
2
B-03(GR)
B-02(GR)
B-01(GR)
CONNECTORS: B-01, B-02, B-03
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-858
STEP 11. Check harness connector B-44 at injector
intermediate connector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 12. Check harness connector B-11, B-33, B-35 at left
bank injector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.Then confirm that the
malfunction symptom is eliminated.
STEP 13. Check harness connector D-132 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK200949
3
4
7
8
1
2
5
6
B-44(B)
CONNECTOR: B-44
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AK201292
1
2
B-11(GR)
B-35(GR)
B-33(GR)
CONNECTORS: B-11, B-33, B-35
AB
HARNESS
CONNECTORS:
COMPONENT SIDE
AK200938
2
3
4
5
6
7
8
9
1
10
14
15
16
17
18
19
20
21
22
23
24
25
26
27
11
12
13
AB
CONNECTOR: D-132
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-132(GR)
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