ECU MITSUBISHI LANCER EVOLUTION 2007 Service Manual Online

MPI -Troubleshooting13A-40
NG
Replace the engine-ECU.
OK
MUT-IIActuator test
DNo. 10: EGR control solenoid valve
OK:Operation sound is heard,
and there is vibration.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the EGR
control solenoid valve and engine
control relay.
DCheck for damage of the power
cable.NG
Repair
From the previous page

MPI -Troubleshooting13A-41
Code No. P0443 Purge control solenoid valve systemProbable cause
Range of check
DIgnition switch: ON
DBattery voltage is 10 V or more.
Set Conditions
DThe solenoid coil surge voltage (battery voltage +2 V) is not detected when the
purge control solenoid valve is turned from ON to OFF.DMalfunction of the purge control solenoid valve
DOpen or short circuit in the purge control solenoid
valve circuit or loose connector contact.
DMalfunction of Engine-ECU
OK
To the next page
OK
Check the harness between the purge
control solenoid valve and
engine-ECU.
DCheck for damage of the output
cable.NG
Repair
OK
Check the following connector:
C-126NG
Repair
OK
Check and repair the harness between
the purge control solenoid valve and
engine-ECU.
DCheck for disconnection and
short-circuit of the output cable.
OK
Measure at the C-126 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 9 and
earth
OK:System voltageNGCheck the following connector:
C - 126NG
Repair
OK
Check and repair the harness between
the purge control solenoid valve and
engine control relay.
DCheck for disconnection and
short-circuit of the power cable.
OK
Measure at the B-23 purge control
solenoid valve connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 2 and
earth
OK:System voltageNGCheck the following connector:
B-11X
OK
Measure at the B-23 purge control so-
lenoid valve connector.
DDisconnect the connector to
measure at the solenoid valve side.
DResistance between terminal No. 1
and terminal No. 2
OK:30 - 34Ω(at 20_C)NGReplace the purge control solenoid
valve.
NG
Check the following connector:
B-23NG
Repair
MUT-IIActuator test
DNo.08: Purge control solenoid
valve
OK:Operation sound is heard,
and there is vibration.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)

MPI -Troubleshooting13A-42
NG
Replace the engine-ECU.
OK
MUT-IIActuator test
DNo. 08: Purge control solenoid
valve
OK:Operation sound is heard,
and there is vibration.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the purge
control solenoid valve and engine
control relay.
DCheck for damage of the power
cable.NG
Repair
From the previous page

MPI -Troubleshooting13A-43
Code No. P0500 Vehicle speed sensor systemProbable cause
Inspection Range
DIgnition switch: ON
DAfter 2 seconds from setting ignition switch to ON position or completion of engine
starting
DThe engine speed is approximately 2,000 - 4,000 r/min or more.
DThe volumetric efficiency is 60 - 80%.
Evaluation Conditions
DVehicle speed signal does not change for 2 seconds. (Pulse signal is not input.)DVehicle speed sensor malfunction
DVehicle speed sensor circuit disconnection,
short-circuit, or connector contact defect
DEngine-ECU malfunction
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
Check the following connectors:
B-03, C-115
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
YES
Measure at the C-115 engine-ECU
connector.
DConnect the connector.
DVoltage between terminal No. 86
and earth
(Ignition switch: ON)
OK:When vehicle is pushed and
moved, repeatedly varies
between 0 and 5 V.OKCheck the following connector:
C-115NG
Repair
Is speedometer normal?NOCheck the vehicle speed sensor.
(Refer to GROUP 54 - Combination
Meter.)
NG
Repair

MPI -Troubleshooting13A-44
Code No. P0505 Idle speed control systemProbable cause
Range of Check
DVehicle speed has reached 1.5 Km/h at least once.
DUnder the closed loop idle speed control.
Set Conditions
DActual idle speed has continued to be higher than the target idle speed by 300
r/min or more for 10 seconds.
Range fo Check
DVehicle speed has reached 1.5 km/h at least once.
DDuring idle speed closed loop control.
DThe highest temperature at the last drive is 45_C or less.
DEngine coolant temperature is approximately 80_C or more.
DBattery voltage is 10 V or more.
DBarometric pressure is 76 kPa or higher.
DIntake air temperature is - 10_C or more.
Set Conitions
DActual idle speed has been minimum 200 r/min higher than the target idle speed
for 10 seconds.
Range of Check
DDuring idle speed closed loop control.
DEngine coolant temperature is approximately 80_C or higher.
DBattery voltage is 10 V or higher.
DPower steering switch is off.
DVolumetric efficiency is 40 % or lower.
DBarometric pressure is 76 kPa or higher.
DIntake air temperature is - 10_C or more.
Set Conitions
DActual idle speed has been minimum 100 r/min higher than the target idle speed
for 10 seconds.DMalfunction of idle speed control servo
DOpen or short circuit in the idle speed control servo
circuit or loose connector contact
DMalfunction of engine-ECU

MPI -Troubleshooting13A-45
OKNG
OK
NG
Check and repair the harness
between the idle speed control servo
and engine control relay.
DCheck for disconnection and
short-circuit of the power cable.
OK
Measure at the B-115 idle speed
control servo connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 2
and earth
DVoltage between terminal No. 5
and earth
OK:System voltageOKCheck the following connector:
B-11XNG
NG
OK
Measure at the B-115 idle speed
control servo connector.
DDisconnect the connector to
measure at the idle speed control
servo side.
DResistance between terminal No.
1 and terminal No. 2
DResistance between terminal No.
2 and terminal No. 3
DResistance between terminal No.
4 and terminal No. 5
DResistance between terminal No.
5 and terminal No. 6
OK:28 - 33ΩReplace the idle speed control servo.
Check the following connector:
B-115NG
Repair
NGCheck the harness between the idle speed control servo and
engine-ECU.
DCheck for damage of the output cable.OK
Repair
NGRepair OK
OKRepair
NG
Repair
OK
OK
Check the harness between the idle
speed control servo and engine-ECU.
DCheck for disconnection and
short-circuit of the output cable.NG
Repair
Check the following connector:
C-126
NG
Replace the engine-ECU.
OKIntermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)Check the trouble symptoms.
Measure at the C - 126 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DVoltage between terminal No. 4
and earth
DVoltage between terminal No. 5
and earth
DVoltage between terminal No. 17
and earth
DVoltage between terminal No. 18
and earth
OK:After the warmed engine
completes starting, the volt-
age repeatedly fluctuates
as shown below.

System voltage↔0-6V
OK
Check the following connector:
C-126NG
Repair
Check the harness between the idle sped control servo and
engine control relay.
DCheck for damage of the power cable.
NG
Replace the engine-ECU.
OKIntermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)Check the trouble symptoms.

MPI -Troubleshooting13A-46
Code No. P0551 Power steering fluid pressure switch
systemProbable cause
Range of Check
DIntake air temperature is - 10_C or higher.
DBarometric pressure is 76 kPa or more.
DEngine coolant temperature is 30_C or more.
DRepeat the *1 drive and *2 stop ten times or more.
*1: Engine speed is 2500 r/min or higher, volumetric efficiency is 55 % or higher and
vehicle speed is 5 km/h or higher for 4 seconds or more.
*2: Vehicle speed is 1.5 km/h or lower.
Set Conditions
DPower steering fluid pressure switch remains on.DPower steering fliud pressure switch failed
DOpen or short circuit in the power steering fluid
pressure switch circuit or loose conector contact
DMulfunction of engine-ECU
NG
OKOK
NGCheck the following connectors:
C-122, C-136
NG
OKNG
OK
Check the harness between the
power steering fluid pressure switch
and engine-ECU.
DCheck for short-circuit of the
output cable.Repair Repair
OKIntermittent malfunction (Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
OK
Measure at the A-48 power steering
fluid pressure switch connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 1
and earth
OK:System voltageNGMeasure at the C-122 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DIgnition switch: ON
DVoltage between terminal No. 37
and earth
OK:System voltage
OK
NG
Replace the engine-ECU.
MUT-IIData list
DNo. 27: Power steering fluid pressure switch (Refer to
P.13A-103.)
OK
Check the following connector:A-48NG
Repair
NG
Repair OK
Check the following connector:
C-126, C-136
Check and repair the harness
between the power steering fluid
pressure switch and engine-ECU.
DCheck for disconnection of the
output cable.
Replace the engine-ECU.
OK
NG
MUT-IIData list
DNo. 27: Power steering fluid
pressure switch (Refer to
P.13A-103.)Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
Measure at the C-122 engine-ECU connector.
DMeasure the engine-ECU terminal voltage.
DEngine: Idling
DVoltage between terminal No. 37 and earth
DSteering wheel: Stationary state
OK:System voltage
DSteering wheel: Steered state
OK:1 V or less
OK
Replace the power steering fluid
pressure switch.Repair
Check the following connector:
C-122NG
Repair
Check the following connector:C-122
Check the harness between the
power steering fluid pressure switch
and engine-ECU.
DCheck for damage of the output
cable.OK
Repair NG

MPI -Troubleshooting13A-47
Code No. P1104 Waste gate solenoid valve systemProbable cause
Inspection Range
DBattery voltage is more than 10 V.
Evaluation Conditions
DSolenoid coil’s surge voltage (battery voltage +2 V) is not detected when the
waste gate solenoid valve turned from ON to OFF.DWaste gate solenoid valve malfunction
DEngine-ECU malfunction
OK
NG
Replace the engine-ECU.
OKIntermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)MUT-IIActuator Test
DNo. 12: Waste gate solenoid
valve
OK:Operation sound is heard,
and there is vibration.OKNG
Repair
OK
NG
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Check the following connector:B-36
MUT-IIActuator Test
DNo. 12: Waste gate solenoid valve
OK:Operation sound is heard,
and there is vibration.
NG
Repair
NGNG
Repair
OK
Check the harness between the
waste gate solenoid valve and
engine-ECU.
DCheck for disconnection and
short-circuit of the output cable.
Check the following connector:C-39
OK
Check the following connector:C-126
Measure at the C-126 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 11
and earth
OK:System voltageNG
Replace the waste gate solenoid
valve.Measure at the B-36 waste gate
solenoid valve connector.
DDisconnect the connector to
measure at the solenoid valve
side.
DResistance between terminal No.
1 and terminal No. 2
OK:29 - 35Ω(at 20_C)
OK
NG
Measure at the B-36 waste gate
solenoid valve connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 1
and earth
OK:System voltage
OKNG
Repair
OK
OK
Check and repair the harness between
the waste gate solenoid valve and
engine control relay.
DCheck for disconnection and
short-circuit of the power cable.
Check the following connector:
B-11X
NG
RepairCheck the harness between the
waste gate solenoid valve and
engine control relay.
DCheck for damage of the power
cable.NG
Repair
OK
Check the harness between the
waste gate solenoid valve and
engine-ECU.
DCheck for damage of the output
cable.

MPI -Troubleshooting13A-48
Code No. P1105 Fuel pressure control solenoid valve
systemProbable cause
Inspection Range
DBattery voltage is more than 10 V.
Evaluation Conditions
DSolenoid coil’s surge voltage (battery voltage +2 V) is not detected when the
fuel pressure control solenoid valve turned from ON to OFF.DFuel pressure control solenoid valve malfunction
DEngine-ECU malfunction
OK
NG
Replace the engine-ECU.
OKIntermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)MUT-IIActuator Test
DNo. 09: Fuel pressure control
solenoid valve
OK:Operation sound is heard,
and there is vibration.OKNG
Repair
OK
NG
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Check the following connector:B-37
MUT-IIActuator Test
DNo. 08: Purge control solenoid
valve
OK:Operation sound is heard,
and there is vibration.
NG
Repair
NGNG
Repair
OK
OK
Check and repair the harness
between the fuel pressure control
solenoid valve and engine-ECU.
DCheck for disconnection and
short-circuit of the output cable.
Check the following connector:
C-126
OK
Check the following connector:C-126
Measure at the C-126 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 3
and earth
OK:System voltageNG
Replace the fuel pressure control
solenoid valve.Measure at the B-37 fuel pressure
control solenoid valve connector.
DDisconnect the connector to
measure at the solenoid valve
side.
DResistance between terminal No.
1 and terminal No. 2
OK:29 - 35Ω(at 20_C)
OK
NG
Measure at the B-37 fuel pressure
control solenoid valve connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 1
and earth
OK:System voltage
OKNG
Repair
OK
OKCheck and repair the harness between
the fuel pressure control solenoid valve
and engine control relay.
DCheck for disconnection and
short-circuit of the power cable.
Check the following connector:
B-11X
NG
RepairCheck the harness between the fuel
pressure control solenoid valve and
engine control relay.
DCheck for damage of the power
cable.NG
Repair
OK
Check the harness between the fuel
pressure control solenoid valve and
engine-ECU.
DCheck for damage of the output
cable.

MPI -Troubleshooting13A-49
Code No. P1500 Alternator FR terminal systemProbable cause
Inspection Range
DEngine speed: More than 50 r/min
Evaluation Conditions
DThe input voltage from the alternator FR terminal is between 4.8 V and 5.2 V
or is the battery voltage for 20 seconds.DOpen circuit in the alternator FR terminal circuit
DMalfunction of engine-ECU
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.NGReplace the alternator. NG
OK
Check the harness between the middle
connector and engine-ECU.
DCheck for damage of the output
wire.Repair NG
OK
Check the harness between the
alternator and middle connector.
DCheck for damage of the output
wire.Repair
OK
Measure at the B-14 middle
connector.
DUsing the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
DEngine: Idling (After warm-up)
DRadiator fan: OFF
DVoltage between terminal No. 5
and earth.
OK:The voltage drops when
the headlamp is turned
from OFF to ON.NGCheck the following connector:
B-22NG
Repair
OK
Replace the alternator.NG
OK
Check the harness between the
alternator and middle connector.
DCheck for short circuit of the
output wire.Repair
OK
Measure at the B-14 middle
connector.
DUsing the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
DIgnition switch: ON
DVoltage between terminal No.5
and earth.
OK:5-6VNGCheck the following connector:
B-22NG
Repair
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.NGReplace the engine-ECU. NG
OK
Check the harness between the
middle connector and engine-ECU.
DCheck for short circuit of the
output wire.Repair
OK
Measure at the B-14 middle
connector.
DDisconnect the connector to
measure at the female connector
side.
DIgnition switch: ON
DVoltage between terminal No.5
and earth.
OK:4.9 - 5.1 VNGCheck the following connector:
C-122NG
Repair
Check the following connector:
B-14NG
Repair