2007 MITSUBISHI LANCER EVOLUTION engine

MPI -Troubleshooting13A-57
Inspection Procedure 4
Engine warning lamp stays illuminated and does not turn
OFF.
Probable cause
The engine-ECU illuminates the engine warning lamp when the occurrence of a
diagnosis code is recorded.DEngine-ECU malfunction
OK
Check and repair the harness between
the combination meter and engine-
ECU.
DCheck for short-circuit of the output
cable.
NG
Check the following connector:
C-130NG
Repair
NG
Replace the engine-ECU.
OK
Measure at the C-122 Engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 36
and earth.
OK:System voltageOKCheck the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NO
Check the following connector:
C-122NG
Repair
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNO-
SIS CODE
(Refer to P.13A-12.)

MPI -Troubleshooting13A-58
Inspection Procedure 5
Starting disabled (Starter does not rotate.)
Probable cause
Causes shown on right are suspected.DBattery malfunction
DIgnition switch malfunction
DStarter malfunction
NG
Repair
OK
OK
NG
Repair
NG
OK
Check the harness between the igni-
tion switch and engine-ECU.
DCheck for disconnection,
short-circuit and damage of the
output cable.OK
Replace the ignition switch.
OK
Check the ignition switch.
(Refer to GROUP 54 - Ignition Switch.)
MUT-IIData list
DNo. 18: Cranking signal
DIgnition switch: ST
OK:ON
DIgnition switch: ON
OK:OFFNGNG
Repair
Check the battery.
(Refer to GROUP 54 - Battery.)NGReplace the battery.
Check the following connector:
C-201
OK
OK
Repair NG OK
Check the following connector:
B-19
OK
Check and repair the harness between
the ignition switch and starter.
DCheck for disconnection of the
output cable.
Measure at the B-19 starter connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ST
DVoltage between terminal No. 1 and
earth
OK:System voltageNG
Repair
Check the following connectors:
C-129, C-115
Check the following connector:
B-14
Check and repair the harness between
the ignition switch and starter.
DCheck for short-circuit of the output
cable.
NG
Repair
OK
Check the following connectors:
B-14, B-19
OK
NG
RepairCheck the following connector:
B-18NG
OK
Measure at the B-18 starter connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ST
DVoltage between terminal No. 1 and
earth
OK:System voltageNGCheck and repair the harness between
the battery and starter.
DCheck for disconnection and
short-circuit of the power cable.
NG
RepairOK
Replace the starter.
Check the harness between the bat-
tery and starter.
DCheck for damage of the power
cable.NG
RepairCheck the harness between the ignition
switch and starter.
DCheck for damage of the output
cable.OK

MPI -Troubleshooting13A-59
Inspection Procedure 6
Starting disabled (Starter rotates but initial combustion
does not occur.)
Probable cause
Causes shown on right are suspected.DBattery malfunction
DIgnition switch malfunction
DIgnition system malfunction
DFuel system malfunction
DThrottle valve malfunction
DTiming belt malfunction
DEngine-ECU malfunction-
OK
To the next page
OK
Check and repair the harness between
the ignition switch and ignition coil for
each cylinder.
DCheck for disconnection and
short-circuit of the power cable.
OK
Measure at the B-114 and B-119
ignition coil connectors.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 1 and
earth
OK:System voltageNGCheck the following connectors:
B-123, B-119NG
Repair
OK
Check the following connectors:
B-114, B-119NG
Repair
OK
MUT-IIData list
DNo. 22: Crank angle sensor (Refer to P.13A-103.)NGCheck 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.
DCheck for disconnection of the output cable.
YES
MUT-IIData list
DNo. 18: Cranking signal
DIgnition switch: ST
OK:ON
DIgnition switch: ON
OK:OFFNGCheck the following
connector:C-42NG
Repair
YES
Does the camshaft rotate during engine cranking?NOCheck the timing belt for defects.
NO
MUT-IIActuator test
DNo. 7: Fuel pump relay
OK:Fuel pump operation sound is heard.NOCheck the Inspection Procedure 23: Fuel pump system.
(Refer to P.13A-85.)
OK
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
OK
Check the engine warning lamp.
DIgnition switch: ON
OK:Engine warning lamp is illuminated.NGCheck 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.)NGReplace the battery.

MPI -Troubleshooting13A-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.
DCheck for damage of the power cable.NG
Repair
OK
Check the ignition coil parts.
(Refer to GROUP 16 - Ignition Device.)NGReplace the ignition coil.
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug.
OK
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug cable.
From the previous page

MPI -Troubleshooting13A-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.DBattery malfunction
DIgnition system malfunction
DFuel system malfunction
DIntake system malfunction
DEGR valve malfunction
DTiming belt malfunction
DImproper compression pressure
DEngine-ECU malfunction
OK
To the next page
OK
Check and repair the harness between
the engine-ECU and earth joint.
DCheck for disconnection and
damage of the earth cable.
(2) NGCheck the following connector:
C-126NG
Repair
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.) NG
OK
Check the harness between the
engine-ECU and battery.
DCheck for disconnection,
short-circuit and damage of the
power cable.Repair
OK
Measure at the C-115 and C-126 en-
gine-ECU connectors.
DMeasure 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) NGCheck the following connectors:
C-115, C-129, C-05, C-135NG
Repair
OK
Check the timing marks on the timing belt.NGAlign the timing marks on the timing belt.
OK
Check the air intake from the intake hose and intake manifold.NG
Repair
NO
MUT-IIData list
DNo. 13: Intake air temperature sensor
DNo. 21: Engine coolant temperature sensor
DNo. 25: Barometric pressure sensor
(Refer to P.13A-102.)

Proceed to OK if all service data values are correct.
Proceed to NG if there is even one abnormal service data value.NGRefer to inspections for diagnosis code of sensor showing abnormal
service data. (Refer to P.13A-12.)
OK
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
NO
Check the battery. (Refer to GROUP 54 - Battery.)NGReplace the battery.
Has the battery terminal been disconnected recently?YESAfter warming up the engine, idle for approximately 10 minutes.

MPI -Troubleshooting13A-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.)NGReplace 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.)NGReplace the ignition coil.
OK
Check the following connectors:B-103, B-119NG
Repair
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug.
OK
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug cable.
From the previous page

MPI -Troubleshooting13A-63
Inspection Procedure 8
Unstable idling (Rough idling, hunting), inappropriate
idling speed (High or low idling speed), engine stalls (Die
out) during idling
Probable cause
Causes shown on right are suspected.DIdle speed control system malfunction
DAir/fuel ratio control system malfunction
DIgnition system malfunction
DFuel system malfunction
DIntake and exhaust system malfunction
DExhaust gas purifier system malfunction
DThrottle valve malfunction
DTiming belt malfunction
DImproper compression pressure
DEngine-ECU malfunction
OK
To the next page
OK
MUT-IIData list
DNo. 11: Oxygen sensor (front) (Refer to P.13A-102.)NGCheck the Code No. P0130: Oxygen sensor (front) system.
(Refer to P.13A-24.)
OK
Check the throttle body (throttle valve section) for contamination.NGClean the throttle body (throttle valve section).
(Refer to P.13A-126.)
OK
Check the air intake from the intake hose and intake manifold.NG
Repair
OK
Check the timing marks on the timing belt.NGAlign the timing marks on the timing belt.
OK
MUT-IIData list
DNo. 27: Power steering fluid pressure switch
(Refer to P.13A-103.)NGCheck the Power steering fluid pressure switch system. (Refer to
P.13A-51, PROCEDURE FOR DAIGNOSIS CODE P0551)
OK
MUT-IIData list
DNo. 45: Idle speed control servo position (Refer to P.13A-105.)NGCheck the Idle speed control servo (stepper motor) system. (Refer
to P.13A - 49 PROCEDURE FOR DIAGNOSIS CODE P0505)
NO
MUT-IIData list
DNo. 12: Air flow sensor
DNo. 13: Intake air temperature sensor
DNo. 14: Throttle position sensor
DNo. 21: Engine coolant temperature sensor
DNo. 25: Barometric pressure sensor
(Refer to P.13A-102.)

Proceed to OK if all service data values are correct.
Proceed to NG if there is even one abnormal service data value.NGRefer to inspections for diagnosis code of sensor showing abnormal
service data. (Refer to P.13A-12.)
NO
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
Has the battery terminal been disconnected recently?YESAfter warming up the engine, idle for approximately 10 minutes.

MPI -Troubleshooting13A-64
OK
To the next page
OK
Measure at the C-39 engine-ECU connector.
DMeasure the engine-ECU terminal voltage.
DEngine: Idling
DA/C switch: ON (A/C compressor driven state)
DVoltage between terminal No .24 and earth
(A/C setting temperature: Minimum temperature)
(Air volume: Maximum)
OK:1 V or less
(A/C setting temperature: indoor temperature)
(Air volume: Minimum)
OK:System voltageNGCheck the Inspection Procedure 28: A/C load signal system.
(Refer to P.13A-95.)
NG
Replace the alternator.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.) NG
OK
Check the harness between the
alternator and engine-ECU.
DCheck for disconnection,
short-circuit and damage of the
output cable.Repair
OK
Measure at the C-40 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DEngine: Idling (after warm-up)
DRadiator fan: Stopped
DVoltage between terminal No. 33
and earth
OK:Voltage rises 0.2 to 3.5 V when
headlamp is turned OFF and
ON.
DVoltage between terminal No. 41
and earth
OK:Voltage drops whenheadlamp
is turned OFF and ON.NGCheck the following connectors:
C-40, B-21, B-03NG
Repair
OK
Check the harness between the
engine-ECU and earth joint.
DCheck for disconnection and
damage of the earth cable.
(2) NGCheck the following connector:
C-39NG
Repair
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.) NG
OK
Check the harness between the
engine-ECU and battery.
DCheck for disconnection,
short-circuit and damage of the
power cable.Repair
OK
Measure at the C-115 and C-126
engine-ECU connectors.
DMeasure 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) NGCheck the following connectors:
C-115, C-129, C-05, C-135NG
Repair
OK
MUT-IIData list
DNo. 59: Oxygen sensor (rear)
(Refer to P.13A-105.)NGCheck the Code No. P0136: Oxygen sensor (rear) system.
(Refer to P.13A-27.)
From the previous page