Mitsubishi Montero Sport (2004+). Manual — part 355
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-833
STEP 8. Check for continuity at ignition power transistor
harness side connector A-05.
(1) Disconnect the connector A-05 and measure at the harness
side.
(2) Check for the continuity between terminal No. 4 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 9.
NO : Repair harness wire between ignition power transistor
connector A-05 (terminal No. 4) and ground. Then
confirm that the malfunction symptom is eliminated.
STEP 9. Measure the circuit at ignition power transistor
connector A-05.
(1) Disconnect the connector A-05 and measure at the harness
side.
(2) Crank the engine.
(3) Measure the voltage between terminals No. 1, No. 2, No. 3
and ground.
• Voltage should be between 0.5 and 4.0 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 12.
NO : Go to Step 10.
AK200475
3
4
5
6
1
2
CONNECTOR: A-05
AB
HARNESS
CONNECTOR:
COMPONENT
SIDE
A-05(B)
AKX01445
A-05 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
3
4
5
6
AE
AK200475
3
4
5
6
1
2
CONNECTOR: A-05
AB
HARNESS
CONNECTOR:
COMPONENT
SIDE
A-05(B)
AKX01446
A-05 HARNESS
CONNECTOR:
COMPONENT SIDE
4
5
6
3 2 1
AE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-834
STEP 10. Check harness connector C-89 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 11. Check for open circuit between ignition power
transistor connector A-05 (terminals No. 1, No. 2, No. 3)
and PCM connector C-89 (terminals No. 11, No. 12, No. 13).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then confirm that the malfunction
symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK200475
3
4
5
6
1
2
CONNECTOR: A-05
AB
HARNESS
CONNECTOR:
COMPONENT
SIDE
A-05(B)
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-835
STEP 12. Measure the circuit at ignition power transistor
connector A-05.
(1) Disconnect the connector A-05 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 5 and ground.
• Voltage should be 4 volts or more.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 4 volts or more?
YES : Replace the ignition power transistor. Then confirm
that the malfunction symptom is eliminated.
NO : Go to Step 13.
STEP 13. Check harness connector C90 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.
AK200475
3
4
5
6
1
2
CONNECTOR: A-05
AB
HARNESS
CONNECTOR:
COMPONENT
SIDE
A-05(B)
AKX01447
A-05 HARNESS
CONNECTOR:
COMPONENT SIDE
6 5 4 3 2 1
AE
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-836
STEP 14. Check for open circuit between ignition power
transistor connector A-05 (terminal No. 5) and PCM
connector C-90 (terminal No. 43).
NOTE: Check harness after checking intermediate connector
C-71. If intermediate connector is damaged, repair or replace
them. Refer to GROUP 00E, Harness Connector Inspection
. Then confirm that the malfunction symptom is elimi-
nated.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then confirm that the malfunction
symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK200475
3
4
5
6
1
2
CONNECTOR: A-05
AB
HARNESS
CONNECTOR:
COMPONENT
SIDE
A-05(B)
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
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