Mitsubishi Outlander (2003+). Manual — part 39
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-19
STEP 12. Connector check: C-135 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair.
STEP 13. Check harness between B-08 (terminal
No. 5) air flow sensor connector and C-135
(terminal No. 40) engine-ECU connector.
NOTE: Before checking harness, check intermediate
connector C-16, and repair if necessary.
Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
AK300256
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
AB
CONNECTOR: C-135
C-135
Harness side connector
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300256
34 33 32
36 35
37
42
45
31
39
38
46
40
41
43
44
AB
CONNECTOR: C-135
C-135
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-20
STEP 14. Measure voltage at B-08 air flow sensor
connector.
Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
Ignition switch: ON
Voltage between terminal No. 7 and earth.
OK: 7
-
8 V
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Go to Step 15 .
STEP 15. Connector check: C-134 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair.
STEP 16. Check harness between B-08 (terminal
No. 7) air flow sensor connector and C-134
(terminal No. 19) engine-ECU connector.
Check reset signal line for short circuit.
Q: Is the check result normal?
YES :
Replace air flow sensor.
NO :
Repair.
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-21
STEP 17. Measure voltage at B-08 air flow sensor
connector.
Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
Transmission: Neutral
Voltage between terminal No. 7 and earth.
OK:
0
-
1 V (Engine: Idling)
6
-
9 V (Engine: 3,000 r/min)
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Go to Step 18 .
STEP 18. Connector check: C-134 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Repair.
STEP 19. Check harness between B-08 (terminal
No. 7) air flow sensor connector and C-134
(terminal No. 19) engine-ECU connector.
Check reset signal line for open circuit and dam-
age.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-22
STEP 20. Measure output waveform at B-08 air
flow sensor connector (Use oscilloscope).
Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
Engine: Idling
Transmission: Neutral
Voltage between terminal No. 3 and earth.
OK: Waveforms should be displayed on
inspection procedure using an oscilloscope
(Refer to
) and noise should not be
displayed in the waveform.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Go to Step 21 .
STEP 21. Replace air flow sensor.
After replacing the air flow sensor, re-check the
trouble symptoms.
Q: Is the check result normal?
YES :
Go to Step 22 .
NO :
Check end.
STEP 22. Connector check: B-17X engine control
relay connector
Q: Is the check result normal?
YES :
Go to Step 23 .
NO :
Repair.
STEP 23. Check harness between B-08 (terminal
No. 4) air flow sensor connector and B-17X
(terminal No. 1) engine control relay connector.
Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 24 .
NO :
Repair.
STEP 24. Connector check: C-134 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 25 .
NO :
Repair.
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300253
3
4
5
1
2
6
7
AB
Harness side connector
B-08 (B)
Connector: B-08
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
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