Mitsubishi Lancer Evolution 7. Manual — part 190
MPI -
Troubleshooting
13A-59
Inspection Procedure 6
Starting disabled (Starter rotates but initial combustion
does not occur.)
Probable cause
Causes shown on right are suspected.
D
Battery malfunction
D
Ignition switch malfunction
D
Ignition system malfunction
D
Fuel system malfunction
D
Throttle valve malfunction
D
Timing belt malfunction
D
Engine-ECU malfunction-
OK
To the next page
OK
Check and repair the harness between
the ignition switch and ignition coil for
each cylinder.
D
Check for disconnection and
short-circuit of the power cable.
OK
Measure at the B-114 and B-119
ignition coil connectors.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1 and
earth
OK: System voltage
NG
Check the following connectors:
B-123, B-119
NG
Repair
OK
Check the following connectors:
B-114, B-119
NG
Repair
OK
MUT-II Data list
D
No. 22: Crank angle sensor (Refer to P.13A-103.)
NG
Check the Code No. P0335: Crank angle sensor system.
(Refer to P.13A-35.)
OK
Check and repair the harness between the ignition switch inter-
mediate connector and engine-ECU.
D
Check for disconnection of the output cable.
YES
MUT-II Data list
D
No. 18: Cranking signal
D
Ignition switch: ST
OK: ON
D
Ignition switch: ON
OK: OFF
NG
Check the following
connector: C-42
NG
Repair
YES
Does the camshaft rotate during engine cranking?
NO
Check the timing belt for defects.
NO
MUT-II Actuator test
D
No. 7: Fuel pump relay
OK: Fuel pump operation sound is heard.
NO
Check the Inspection Procedure 23: Fuel pump system.
(Refer to P.13A-85.)
OK
MUT-II Self-Diag code
D
Is a diagnosis code output?
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
OK
Check the engine warning lamp.
D
Ignition switch: ON
OK: Engine warning lamp is illuminated.
NG
Check the Inspection Procedure 22: Engine-ECU power supply,
engine control relay, ignition switch-IG1 system.
(Refer to P.13A-82.)
Check the battery. (Refer to GROUP 54 - Battery.)
NG
Replace the battery.
MPI -
Troubleshooting
13A-60
NG
Check for the entry of foreign matter (water, kerosene, etc.) in fuel.
Check the trouble symptoms.
OK
End
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
End
OK
Check the harness between the ignition switch and ignition coil for
each cylinder.
D
Check for damage of the power cable.
NG
Repair
OK
Check the ignition coil parts.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the ignition coil.
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug.
OK
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug cable.
From the previous page
MPI -
Troubleshooting
13A-61
Inspection Procedure 7
Starting disabled (Initial combustion occurs but is
incomplete.), improper starting (Starting time is long.)
Probable cause
Causes shown on right are suspected.
D
Battery malfunction
D
Ignition system malfunction
D
Fuel system malfunction
D
Intake system malfunction
D
EGR valve malfunction
D
Timing belt malfunction
D
Improper compression pressure
D
Engine-ECU malfunction
OK
To the next page
OK
Check and repair the harness between
the engine-ECU and earth joint.
D
Check for disconnection and
damage of the earth cable.
(2) NG
Check the following connector:
C-126
NG
Repair
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
OK
Check the harness between the
engine-ECU and battery.
D
Check for disconnection,
short-circuit and damage of the
power cable.
Repair
OK
Measure at the C-115 and C-126 en-
gine-ECU connectors.
D
Measure the engine-ECU terminal
voltage.
(1) Voltage between terminal No. 80
and earth
OK: System voltage
(2) Voltage between terminal No. 13
and earth
Voltage between terminal No. 26
and earth
(Ignition switch: ON)
OK: 0.5 V or less
(1) NG
Check the following connectors:
C-115, C-129, C-05, C-135
NG
Repair
OK
Check the timing marks on the timing belt.
NG
Align the timing marks on the timing belt.
OK
Check the air intake from the intake hose and intake manifold.
NG
Repair
NO
MUT-II Data list
D
No. 13: Intake air temperature sensor
D
No. 21: Engine coolant temperature sensor
D
No. 25: Barometric pressure sensor
(Refer to P.13A-102.)
<Reference>
Proceed to OK if all service data values are correct.
Proceed to NG if there is even one abnormal service data value.
NG
Refer to inspections for diagnosis code of sensor showingabnormal
service data. (Refer to P.13A-12.)
OK
MUT-II Self-Diag code
D
Is a diagnosis code output?
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
NO
Check the battery. (Refer to GROUP 54 - Battery.)
NG
Replace the battery.
Has the battery terminal been disconnected recently?
YES
After warming up the engine, idle for approximately 10 minutes.
MPI -
Troubleshooting
13A-62
NG
Check for the entry of foreign matter (water, kerosene, etc.) in fuel.
Check the trouble symptoms.
OK
End
NG
Replace the engine-ECU.
Check the trouble symptoms.
OK
End
OK
Replace the injectors for all cylinders.
Check the harness and connector between each cylinder’s injector
and engine-ECU for disconnection, short-circuit or damage.
NG
Repair
OK
Check the fuel pressure. (Refer to P.13A-128.)
OK
Check the EGR valve for sticking.
(Refer to GROUP 17 - Exhaust Gas Purifier Check.)
NG
Replace the EGR valve.
OK
Check the compression pressure.
(Refer to GROUP 11 - Engine Adjustment.)
NG
Repair
OK
Check the harness and connectors between the ignition coil and
body earth and between the engine-ECU and ignition coil for
disconnection, short-circuit or damage.
NG
Repair
OK
Check the ignition coil parts.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the ignition coil.
OK
Check the following connectors: B-103, B-119
NG
Repair
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug.
OK
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug cable.
From the previous page
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