Mitsubishi Colt Ralliart. Manual — part 48
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-146
STEP 5. 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.
• Disconnect A-110 camshaft position sensor con-
nector.
• Ignition switch: ON
• Voltage between terminal No. 12 and earth.
OK: 4.9
− 5.1 V
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Go to Step 7 .
STEP 6. 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-110
(terminal No. 2) camshaft position sensor
connector and A-114 (terminal No. 12)
engine-ECU connector or engine-CVT-ECU
connector.
• Check output line for open circuit.
NO :
Repair or replace the connector.
AK402745
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AE
A-114
Connector:
A-114
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
A-114 Special tool power plant ECU check
harness
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 Harness side
connector
AK402745
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AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 Harness side
connector
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-147
STEP 7. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the connector.
STEP 8. Check harness between A-110 (terminal
No. 2) camshaft position sensor connector and
A-114 (terminal No. 12) engine-ECU connector or
engine-CVT-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. M.U.T.-III diagnosis code
• Reconfirmation of diagnosis code.
Q: Is the diagnosis code set?
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
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L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 Harness side
connector
AK402745
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4
2
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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
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-148
STEP 10. Perform resistance measurement at
A-110 camshaft position sensor connector.
• Disconnect connector, and measure at harness
side.
• Resistance between terminal No. 1 and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 11 .
STEP 11. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace the connector.
STEP 12. Check harness between A-110 (terminal
No. 1) camshaft position sensor connector and
A-114 (terminal No. 27) engine-ECU connector or
engine-CVT-ECU connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 Harness side
connector
AK402745
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4
2
5
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
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 Harness side
connector
AK402745
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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-149
STEP 13. Perform output wave pattern
measurement at A-110 camshaft position sensor
connector (Using an oscilloscope).
• Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
• Engine: Idling
• Transmission: P range
• Voltage between terminal No. 2 and earth.
OK: Waveforms should be displayed on
Inspection procedure using an oscilloscope
(Refer to
), its maximum value
should be 4.8 V or more, and its minimum
value should be 0.6 V or less with no noise in
waveform.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 14 .
STEP 14. Connector check: B-106 engine control
relay connector.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair or replace the connector.
1
2
3
AK402009
Connector: A-110
AC
A-110 (B)
A-110 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
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