Mitsubishi Colt Ralliart. Manual — part 79
![](/vehicles/winoney/ama/flend/ohe.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-270
STEP 8. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 11: Oxygen sensor (front)
b. Item 59: Oxygen sensor (rear)
Q: Are the check results normal?
YES :
Go to Step 9 .
NO :
Perform the diagnosis code classified check
Procedure for the sensor that has shown an
abnormal data value (Refer to Inspection
Chart for Diagnosis Code
STEP 9. Check purge control solenoid valve
itself.
• Check purge control solenoid valve itself (Refer
to GROUP 17
− Emission Control System −
Evaporative Emission Control System
− Purge
Control Solenoid Valve Check
).
Q: Is the check result normal?
YES :
Go to Step 10 <CVT> , go to Step 11 <M/T>
NO :
Replace purge control solenoid valve.
STEP 10. Check EGR valve (stepper motor)
itself.
• Check EGR valve (stepper motor) itself [Refer to
GROUP 17
− Emission Control System −
Exhaust Gas Recirculation (EGR) System
− EGR
Valve (Stepper Motor) Check
].
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Replace EGR valve (stepper motor).
STEP 11. Fuel pressure measurement.
• Fuel pressure measurement (Refer to Fuel Pres-
sure Test
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair.
STEP 12. Check positive crankcase ventilation
valve itself.
• Check positive crankcase ventilation valve itself
(Refer to GROUP 17
− Emission Control System
− crankcase Emission Control System − Positive
Crankcase Ventilation (PCV) Valve Check
).
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Replace positive crankcase ventilation
valve.
STEP 13. Check spark plug.
• Check spark plug (Refer to GROUP 16 − Ignition
System
− On-vehicle Service − Spark Plug Check
and Cleaning
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Replace spark plug.
STEP 14. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service − Compression Pres-
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair.
STEP 15. Check injector for spraying condition.
• Check each injector for spray condition (Refer to
).
Q: Does trouble symptom persist?
YES :
Go to Step 16 .
NO :
Replace injector.
STEP 16. Replace catalytic converter.
• After replacing the catalytic converter, re-check
the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace engine-ECU <M/T> or
engine-CVT-ECU <CVT>.
NO :
Check end
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/qul.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-271
Inspection Procedure 19: Battery run down
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed alternator,
failed generation control circuit or other faults.
PROBABLE CAUSES
• Failed battery
• Alternator G terminal short-circuited
• Failed alternator
• Failed engine-ECU <M/T> or engine-CVT-ECU
<CVT>
DIAGNOSIS PROCEDURE
STEP 1. Check battery voltage.
• Measure battery voltage during cranking.
OK: 8 V or more
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. Connector check: A-131 alternator
connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
STEP 3. Perform voltage measurement at A-131
alternator connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Go to Step 4 .
STEP 4. Connector check: B-141 ignition switch
connector
AK402057
2 1
3
4
AC
Connector: A-131
A-131 (G)
A-131 Harness side
connector
AK402057
2 1
3
4
AC
Connector: A-131
A-131 (G)
A-131 Harness side
connector
AK402054
B-141
AC
Connector: B-141
1
2
3
4
5
6
B-141 Harness
side connector
AK402057
2 1
3
4
AC
Connector: A-131
A-131 (G)
A-131 Harness side
connector
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/panourouryou.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-272
Q: Is the check result normal?
YES :
Check intermediate connectors A-17, B-14,
B-41, B-22, B-131, B-129, and repair if
necessary. If intermediate connectors are
normal, check and repair harness between
A-131 (terminal No. 3) alternator connector
and B-141 (terminal No. 2) ignition switch
connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace the connector.
STEP 5. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair or replace the connector.
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. 64 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Go to Step 7 .
AK402745
6
4
2
5
3
1
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64
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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
6
4
2
5
3
1
9
7
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64
65
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L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/xxx.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-273
STEP 7. Check harness between A-114 (terminal
No. 64) engine-ECU connector or
engine-CVT-ECU connector and A-131 (terminal
No. 1) alternator connector.
• Check output line for open/short circuit.
Q: Is the check result normal?
YES :
Replace alternator.
NO :
Repair the damaged harness wire.
STEP 8. Perform voltage measurement at A-114
engine-ECU connector or engine-CVT-ECU
connector.
• Disconnect engine-ECU connector or
engine-CVT-ECU connector, and connect Special
Tool Power Plant ECU Check Harness
(MB991987), and then measure the voltage on
the check connector.
• Engine: Idling after warm-up
• Transmission: P range
• Radiator fan: Inactive
• Voltage between terminal No. 64 and earth.
OK: Switching the headlamps to ON from
OFF causes the voltage to increase 0.2
− 3.5
V.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Replace alternator.
STEP 9. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace engine-ECU <M/T> or
engine-CVT-ECU <CVT>.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
AK402745
6
4
2
5
3
1
9
7
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56
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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
AK402057
2 1
3
4
AC
Connector: A-131
A-131 (G)
A-131 Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
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48
49
50
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
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