Mitsubishi Colt Ralliart. Manual — part 52
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-162
STEP 6. Perform voltage measurement at A-114
engine-ECU connector or engine-CVT-ECU
connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 38 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Go to Step 7 .
STEP 7. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Check and repair harness between A-108
(terminal No. 1) purge control solenoid valve
connector and A-114 (terminal No. 38)
engine-ECU connector or engine-CVT-ECU
connector.
• Check output line for open/short
circuit.
NO :
Repair or replace the connector.
AK402745
6
4
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L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402745
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3
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L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402007
1
2
AC
Connector: A-108
A-108 (B)
A-108 Harness side
connector
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-163
STEP 8. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair or replace the connector.
STEP 9. Check harness between A-108 (terminal
No. 1) purge control solenoid valve connector
and A-114 (terminal No. 38) engine-ECU
connector or engine-CVT-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair the damaged harness wire.
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
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57
58
59
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61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402007
1
2
AC
Connector: A-108
A-108 (B)
A-108 Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
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14
15
16
17
18
19
20
21
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30
31
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36
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41
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47
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49
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51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-164
STEP 10. Check harness between A-114 (terminal
No. 2) purge control solenoid valve connector
and B-106 (terminal No. 4) engine control relay
connector.
NOTE: Before checking harness, check intermediate
connector A-17 and B-112, and repair if necessary.
• Check power line for damage.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair the damaged harness wire.
STEP 11. M.U.T.-III actuator test
• Item 08: purge control solenoid valve
OK: Operating sound can be heard and the
valve vibrates
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to Group 00
−
How to Use Troubleshooting/Inspection
Service Points
− How to Cope with
Intermittent Malfunctions
).
NO :
Replace engine-ECU <M/T> or
engine-CVT-ECU <CVT>.
AK402007
1
2
AC
Connector: A-108
A-108 (B)
A-108 Harness side
connector
3
2
1
4
AK402060
B-106
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-165
Code No. P0500: Vehicle Speed Signal System <M/T>
FUNCTION
• The vehicle speed signals are input to
engine-ECU from ABS-ECU through CAN com-
munication.
TROUBLE JUDGMENT
Check Conditions
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up.
• Engine speed is 2,500 − 4,000 r/min.
• Under the high load operation
Judgment Criteria
• For 4 seconds, the vehicle speed information
received using the CAN does not change.
or
• For 4 seconds, the vehicle speed information
received using the CAN is abnormal.
PROBABLE CAUSES
• Failed ABS-ECU
• Failed CAN
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is diagnosis code related with CAN communication
displayed?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. M.U.T.-III other system diagnosis code
• Confirm whether the diagnosis codes are output
from ABS-ECU.
Q: Is the diagnosis code output?
YES :
Perform the troubleshooting of ABS (Refer
to GROUP 35B
− Troubleshooting − Check
Chart for Diagnosis Code
NO :
Replace the engine-ECU (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
Main
Index
Group
TOC
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