Mitsubishi Colt Ralliart. Manual — part 731
![](/vehicles/winoney/ama/flend/aif.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-249
STEP 12. Check harness between B-105 (terminal
No. 4) starter relay connector and A-114 (terminal
No. 39) engine-ECU connector.
NOTE: Before checking harness, check intermediate
connectors B-109 and A-17, and repair if necessary.
.
•
Check output line for open/short circuit and dam-
age.
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair.
STEP 13. Connector check: A-125 starter
connector
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair or replace.
STEP 14. Check harness between B-105 (terminal
No. 4) starter relay connector and A-125 (terminal
No. 1) starter connector.
NOTE: Before checking harness, check intermediate
connectors B-109 and A-17, and repair if necessary.
.
•
Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair.
AK600403
3
2
1
4
AC
Connector: B-105
B-105
Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
AK402055
1
Connector: A-125
A-125 Harness side
connector
AC
A-125 (B)
AK600403
3
2
1
4
AC
Connector: B-105
B-105
Harness side
connector
AK402055
1
Connector: A-125
A-125 Harness side
connector
AC
A-125 (B)
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/ssepokfrclll.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-250
STEP 15. Check harness between B-141 (terminal
No. 5) ignition switch connector and B-105
(terminal No. 1, 3) starter relay connector.
NOTE: Before checking harness, check intermediate
connectors B-129, and repair if necessary.
.
•
Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair.
STEP 16. Check harness between B-105 (terminal
No. 2) starter relay connector and B-60 (terminal
No. 2) clutch switch connector.
NOTE: Before checking harness, check intermediate
connector B-112, and repair if necessary.
.
•
Check power supply line for damage.
Q: Is the check result normal?
YES :
Replace engine-ECU.
NO :
Repair.
STEP 17. Connector check: A-124 starter
connector
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair or replace.
AK402054
B-141
AC
Connector: B-141
1
2
3
4
5
6
B-141 Harness
side connector
AK600403
3
2
1
4
AC
Connector: B-105
B-105
Harness side
connector
AK600403
3
2
1
4
AC
Connector: B-105
B-105
Harness side
connector
AK600404
2 1
AC
Connector: B-60
B-60
Harness side
connector
AK402056
1
Connector: A-124
A-124 Harness side
connector
AC
A-124
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/weeehinint.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-251
STEP 18. Perform voltage measurement at A-124
starter connector.
• Disconnect connector, and measure at the har-
ness side.
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Check and repair harness between battery
and A-124 (terminal No.1) starter connector.
• Check power supply line for
open/short circuit.
STEP 19. Check harness between battery and
A-124 (terminal No. 1) starter connector.
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Repair.
STEP 20. Check harness between B-105 (terminal
No. 4) starter relay connector and A-125 (terminal
No. 1) starter connector.
NOTE: Before checking harness, check intermediate
connectors B-109 and A-17, and repair if necessary.
.
•
Check output line for open circuit and damage.
Q: Is the check result normal?
YES :
Replace starter.
NO :
Repair.
AK402056
1
Connector: A-124
A-124 Harness side
connector
AC
A-124
AK402056
1
Connector: A-124
A-124 Harness side
connector
AC
A-124
AK600403
3
2
1
4
AC
Connector: B-105
B-105
Harness side
connector
AK402055
1
Connector: A-125
A-125 Harness side
connector
AC
A-125 (B)
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/bong.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-252
Inspection Procedure 5: Starting Impossible (Starter Operative but No Initial Combustion)
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed ignition cir-
cuit, failed fuel feed or other faults.
PROBABLE CAUSES
• Failed battery
• Broken timing belt
• Throttle valve body fouled
• Failed ignition system
• Failed fuel system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check battery voltage.
• Perform voltage measurement during cranking.
OK: 8V or higher
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check battery (Refer to GROUP 54A
−
Battery
− On-vehicle Service − Battery Test
).
STEP 2. With M.U.T.-III of communication
• Confirm the communication available M.U.T.-III
and engine-ECU.
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check engine-ECU power source, engine
control relay, and ignition switch IG1 system
(Refer to Inspection Procedure 21
).
STEP 3. M.U.T.-III diagnosis code
Q: Is the diagnosis code output?
YES :
Inspection chart for diagnosis codes (Refer
to
NO :
Go to Step 4 .
STEP 4. M.U.T.-III actuator test
• Item 07: Fuel pump
OK: There should be fuel pump operating
sound.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Check fuel pump system (Refer to
Inspection Procedure 22
STEP 5. Check timing belt for breakage.
• Engine: Cranking
OK: Camshaft rotates.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Replace timing belt.
STEP 6. Check throttle body (throttle valve) for
contamination.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Clean throttle body (throttle valve) (Refer to
).
STEP 7. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 18: Cranking signal
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 8 .
Main
Index
Group
TOC
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