engine MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

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

MPI -Troubleshooting13A-50
Code No. P1603 Battery backup line malfunctionProbable cause
Inspection Range
DIgnition switch: ON
Evaluation Conditions
DThe backup RAM information set at the last time when the ignition switch
was turned to the OFF position is not memorized.DBattery backup line 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 Malfunction.)
OK
Check the following connector:
C-115NG
Repair
OK
Check and repair the harness
between battery and engine-ECU.
DCheck for disconnection and
short-circuit of the power cable.
NGCheck the following connector:
C-129, C-05, C-135NG
Repair NO
MUT-II Self-Diag code
DDiagnosis codes No. P1603 is
output.End
NO
Measure at the C-115 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DVoltage between terminal No.80
and earth.
OK:System voltageYES
Turn the ignition switch to the
“LOCK”(OFF) position and then in 10
seconds turn the ignition switch to the
“ON” positionIs the battery terminal disconnected
before reading the diagnostic trouble
code?

MPI -Troubleshooting13A-51
Code No.P1610 Immobilizer system General Export-spec. models>Probable cause
Inspection Range
DIgnition switch: ON
Set Conditions
DImproper communication between the engine-ECU and the immobilizer-ECUDOpen or short circuit, or loose connector contact
DMalfunction of the immobilizer-ECU
DMalfunction of the engine-ECU
NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may
cause this code to be displayed.
(2) This code may be displayed when registering the key encrypted code.
NG
Replace the engine-ECU.
Check the trouble symptoms.
NG
Replace the immobilizer-ECU
OK
Check the trouble symptoms.
OK
Check the harness wire between the
immobilizer-ECU and the
engine-ECU, and repair if necessary.NG
Replace
Check the following connectors:
C-202, C-130, C-118NG
Repair

MPI -Troubleshooting13A-52
INSPECTION CHART FOR TROUBLE SYMPTOMS
Inspection
procedureCheck itemsReference page
1Communication between MUT-IIand entire system is not possible.13A-54
2Only communication between MUT-IIand engine-ECU is not possible.13A-55
3Engine warning lamp does not illuminate immediately after ignition switch is set to ON position.13A-56
4Engine warning lamp stays illuminated and does not turn OFF.13A-57
5Starting disabled (Starter does not rotate.)13A-58
6Starting disabled (Starter rotates but initial combustion does not occur.)13A-59
7Starting disabled (Initial combustion occurs but is incomplete.)13A-61
Improper starting (Starting time is long.)
8Unstable idling (Rough idling, hunting)13A-63
Inappropriate idling speed (High or low idling speed)
Engine stalls (Die out) during idling
9Engine stalls when starting travel. (Pass out)13A-66
10Engine stalls during deceleration13A-67
11Pulsation (Hesitation, sag)13A-68
Poor acceleration
Stumbling
Surging
12Shock during acceleration13A-70
13Shock during deceleration13A-71
14Knocking13A-72
15Deviation of ignition interval13A-73
16Run on (Dieseling)13A-74
17Abnormal odor, white smoke, black smoke, high CO or HC concentration when idling13A-75
18Battery dies13A-77
19Overheating13A-79
20Abnormal radiator fan motor rotation13A-80
21A/C ineffective13A-81
22Engine-ECU power supply, engine control relay, ignition switch-IG1 system13A-82
23Fuel pump system13A-85
24Radiator fan control relay system13A-87
25Condenser fan relay system13A-89
26A/C switch system13A-92
27A/C compressor relay system13A-93
28A/C load signal system13A-95
29Secondary air control solenoid valve system13A-96
30Intercooler water spray circuit system13A-97
31Intercooler water spray lamp system13A-99
32Ignition coil (integrated power transistor) system13A-100

MPI -Troubleshooting
Fig. 1
Vehicle
speedInitial ac-
celerator
pedal de-
pressionNormalHesitation
Sag
TimeFig. 2
Normal
Initial ac-
celerator
pedal de-
pression
IdlingStumble
Time Vehicle
speed
13A-53
PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION)
ItemsSymptom
StartingWon’t startThe starter is used to crank the engine, but there is no combustion within the
cylinders, and the engine won’t start.
Fires up and diesThere is combustion within the cylinders, but then the engine soon stalls.
Hard startingEngine starts after cranking a while.
Idling
stability
HuntingEngine speed doesn’t remain constant; changes at idle.
stability
Rough idleUsually, a judgement can be based upon the movement of the tachometer
pointer, and the vibration transmitted to the steering wheel, shift lever, body, etc.
This is called rough idle.
Incorrect idle speedThe engine doesn’t idle at the usual correct speed.
Engine stall
(Die out)The engine stalls when the foot is taken from the accelerator pedal, regardless
of whether the vehicles is moving or not.
Engine stall
(Pass out)The engine stalls when the accelerator pedal is depressed or while it is being
used.
DrivingHesitation Sag“Hesitation” is the delay in response of the vehicle speed (engine speed) that
occurs when the accelerator is depressed in order to accelerate from the speed
at which the vehicle is now traveling, or a temporary drop in vehicle speed
(engine speed) during such acceleration.
Serious hesitation is called “sag”. (Refer to Fig. 1)
Poor accelerationPoor acceleration is inability to obtain an acceleration corresponding to the
degree of throttle opening, even though acceleration is smooth, or the inability
to reach maximum speed.
StumbleEngine speed increase is delayed when the accelerator pedal is initially
depressed for acceleration. (Refer to Fig. 2)
ShockThe feeling of a comparatively large impact or vibration when the engine is
accelerated or decelerated.
SurgeThis is repeated surging ahead during constant speed travel or during variable
speed travel.
KnockingA sharp sound like a hammer striking the cylinder walls during driving and which
adversely affects driving.
StoppingRun on
(“Dieseling”)The condition in which the engine continues to run after the ignition switch is
turned to “LOCK” (OFF) position. Also called “Dieseling”.