exhaust MITSUBISHI LANCER EVOLUTION IX 2005 Owner's Manual

13A-10MPI – TROUBLESHOOTING
Continued from the previous page
Replace the engine ECU
Check connectorB-19X
Inspect the harness between the
exhaust cam position sensor and
the engine control relay
•Check if the power wire is
damaged
Check the exhaust cam position
sensing cylinder
Check connectorC-49 and C-50
Check that the problem has been
solved
Inspect the harness between the
exhaust cam position sensor and
the engine ECU
•Check if the output wire is
damaged
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Measurement of the output wave
at the exhaust cam position
sensor connector B-115 (using an
oscilloscope)
•Use test harness (MB991709),
connect it to the connector, and
take measurements at the pick-
up harness component
•Engine: idling
•Voltage across earth at 2
OK: An output wave as
described on P.13A-25
(Main points for
oscilloscope testing) is
produced, with the
maximum value in excess
of 4.8V and the minimum
value less than 0.6V.
There should be no noise
in the output wave form.
Check that the problem has been
solved
OK
OK
NG
NG
OK
OK
OK
Replace the exhaust cam position
sensor
NG
OK
Replace the exhaust cam position
sensing cylinder
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
OK
OK
Repair
Repair
NG
NG
Repair NG
Repair NG
NG
OK

13A-16MPI – TROUBLESHOOTING
Check the purge control solenoid valve (Refer to Section
17: Checking the exhaust gas purification system)
MUT-II/III Service data
•No.11 O
2sensor (Ref: P13A-83)*
Refer to the diagnosis code classification table (P13A-6)MUT-II/III diagnosis code
•Is the diagnosis code displayed?
Check the timing of ignition (Ref Section 11, Engine
tuning)
Check the sound made by the injector (using a
soundscope)
Check the crank angle sensor and the fitting of the timing
belt cover
If there is abnormality in the exhaust gases and code
Nos. P0201~P0204 are recorded, check the injector
system
If abnormal sensor data is recorded, carry out inspections
for each diagnosis code in order (Ref: P13A-6)
Replace the purge control solenoid valve
Code No.P0130: O
2sensor system inspection (Ref:
P13A-16)*
Go on to next page.
MUT-II/III Service data
•No.13: Intake air temperature sensor
•No.14: TPS
•No.21: Water temperature sensor
•No.25: Atmospheric pressure sensor
•No.95: MAP sensor
(Ref: P13A-24)

Proceed to OK if all service data levels are normal.
Proceed via NG even if only one of the service data
levels is abnormal.
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
NO
OK
OK
OK
OK
OK
YES
NG
NG
NG
NG
Inspection procedureFault to be checkedReference page
11
Engine seems hesitant
13A-16Acceleration malfunction
Engine seems to stumble
Engine has a power surge
15Mis-timed ignition13A-18
35Inter-cooler water spray circuit system13A-19
37No.2 waste gate solenoid valve system13A-21
38Air temperature sensor system13A-22
Engine seems hesitant, acceleration malfunction, engine
seems to stumble, engine has a power surgeProbable causes of the malfunction
Probable causes of the malfunction are noted in the right hand
column.•Malfunction of the air/fuel mixing control system
•Malfunction of the ignition system
•Malfunction of the fuel system
•Malfunction of the intake system
•Malfunction of the exhaust gas purification system
•Failure of compression pressure
•Malfunction of the turbocharger system
5. Inspection procedure for each type of fault
Inspection procedure 11
4. Checklist of faults

13A-17MPI – TROUBLESHOOTING
*: Refer to the 01-1 Service Manual for the Lancer Evolution VIII (No.1036K02)
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
Repair
Repair
Repair
Repair
Repair
Repair
Continued from previous page
Replace the spark plug wire
Replace the spark plug
Replace the ignition coil
Inspection procedure 33: Inspection of the No.1 waste
gate solenoid valve (Ref: P13A-78) *2
Inspection procedure 37: Inspection of the No.2 waste
gate solenoid valve (Ref: P13A-21)
Inspection procedure 31: Inspection of the fuel control
solenoid valve (Ref: P13A-76) *2
Inspection procedure 38: Inspection of the air
temperature sensor (Ref: P13A-22)
Check the spark plug wire (Ref: Section 16: Ignition
apparatus)
Check the spark plug (Ref: Section 16: Ignition
apparatus)
Check connectors B-123 & B-119
Check the ignition coil (Ref: Section 16: Ignition
Apparatus)
Inspect the harness and the connectors between each
cylinder’s ignition coil and the body earth, and between
the engine ECU and the ignition coil. Check for cut or
short circuited wires, or other damage.
MUT-II/III Actuator test
•No.12: Waste gate solenoid valve (Ref: P13A-87)*2
Check the supercharge pressure of the turbo charger
(Ref: Section 15: Intake/Exhaust car servicing)
Check the supercharge pressure control system (Ref:
Section 15: Intake/Exhaust car servicing)
MUT-II/III Actuator test
•No.09: Fuel pressure control solenoid valve (Ref:
P13A-87)
Check the fuel pressure (Ref: P13D-109)
Check the compression pressure (Ref: Section 11:
Engine tuning)
If the intake hose and the inlet manifold are damaged
check the air intake and repair as necessary.
Measurements taken at B-108 air temperature sensor
connector
•Using the test harness (MB991658), connect it to only
connectors No.1 and No.2 and measure at the pick-
up harness component.
•Ignition switch: ON
•Voltage across earth at 1
OK:surrounding temperature -20ºC 3.8~4.4V
surrounding temperature 0ºC 3.2~3.8V
surrounding temperature 20ºC 2.3~2.9V
surrounding temperature 40ºC 1.5~2.1V
surrounding temperature 60ºC 0.8~1.4V
surrounding temperature 80ºC 0.4~1.0V
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG

13A-18MPI – TROUBLESHOOTING
Measure the output wave from
the crank angle sensor and the
cam position sensor (using an
oscilloscope).
•Engine: idling

•Measure the output wave at
the crank angle sensor
connector B-122
•Connect test harness
(MB998478), to the connector,
and take measurements at the
pick-up harness component
•Voltage across earth at 2

•Measure the output wave at
the exhaust cam position
sensor connector B-115
•Connect test harness
(MB991709), to the connector
and take measurements at the
pick-up harness component
•Voltage across earth at 2
OK:The output wave timing
from both sensors is as
shown on P13A-25
(Main points for
oscilloscope testing).Check that the problem has been
solvedTemporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Replace the engine ECU
NO
OK
NG
OK
NG
NG
NG
Repair
Miss-timed ignitionProbable causes of the malfunction
Probable causes of the malfunction are noted in the right
hand column.•Malfunction of the crank angle sensor
•Malfunction of the exhaust cam position sensor
•Malfunction of the timing belt
•Malfunction of the engine ECU
Inspection procedure 15
Refer to the diagnosis code classification table (P13A-6)MUT-II/III Diagnosis code
•Is the diagnosis code displayed?YES
Repair
Replace the crank angle sensor pane
Match up the timing marks on the timing belt
Replace the exhaust cam position sensing cylinder
Temporary malfunction (Ref Section 00: Dealing with
temporary malfunctions)
Check the exhaust cam position sensing cylinder
Check the fitting of the crank angle sensor and the
exhaust cam position sensor
Check the timing marks on the timing belt
Check the crank angle sensor pane
Replace the crank angle sensor
Check that the problem has been solved
Replace the exhaust cam position sensor
Check that the problem has been solved
Replace the engine ECU
OK
OK
OK
NG
OK
NG
NG
NG
OK
OK

13A-19MPI – TROUBLESHOOTING
Check the operation of the inter-
cooler water spray
•Ignition switch: ON
•Inter-cooler water spray
switch (manual): ON
OK:Inter-cooler water spray
operates
Check the operation of the inter-
cooler water spray
•Undo the engine ECU
connector C-50, and earth
terminal 56.
•Ignition switch: ON
OK:Inter-cooler water spray
operates
Check connector:C-220
Check the inter-cooler water
spray relay (Refer to Section 15:
Intake/Exhaust)
Go on to the next page
Measure at the inter-cooler water
spray switch connector D-32
•Undo the connector and
measure on the harness side
•Ignition switch: ON
•Voltage across earth at 5
OK:battery voltage
Check connectors: C-22 & C-50
Check connector: D-32
Inspect the harness between the
engine ECU and the inter-cooler
water spray switch
•Check if the signal wire is cut
or has short circuited
Replace the engine ECU
Check connectors: C-22 & C-50
Measure at the inter-cooler water
spray switch connector D-32
•Undo the connector and
measure on the harness side
•Ignition switch: ON
•Voltage across earth at 3 & 5
OK:battery voltage
Replace the inter-cooler water
spray relayReplace engine ECU
Check the inter-cooler water
spray switch (Ref Section 15:
Intake/Exhaust)
Inspect the harness between the
inter-cooler water spray switch
and the engine ECU
•Check if the signal wire is
damaged
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Check connector:D-32
Check the inter-cooler water
spray switch
(Ref Section 15: Intake/Exhaust)
Check connector:C-107
Replace the inter-cooler water
spray relayInspect the harness
between the inter-cooler water
spray switch and earth
•Check if the earth wire is cut
or damaged
Inspect the harness between the
inter-cooler water spray switch
and the engine ECU, repair if
necessary
•Check if the signal wire is
damaged
Inspect the harness between the
engine ECU and the inter-cooler
water spray switch
•Check if the signal wire is cut
or has short circuited
OK
NG
NG
OK
NG
NG
OK
OK
OK
OK
NG
OK
OK
NG
NG
Repair
Inspection procedure 35
Inter-cooler water spray circuit systemProbable causes of the malfunction
•If the inter-cooler water spray switch (manual) is turned ON, the inter-cooler
water spray manual ‘ON’ signal will be input in the engine ECU. When this
signal is received, the engine ECU will turn the inter-cooler water spray relay
ON, and will start the inter-cooler water spray motor. Water will be sprayed
into the inter-cooler to cool intake air, and filling efficiency will improve.
•If the inter-cooler water spray switch (auto) is turned ON, the inter-cooler
water spray auto ‘ON’ signal will be input in the engine ECU. When this
signal is received the engine ECU will intermittently run at a high load, it will
turn the inter-cooler water spray relay ON, and it will start the inter-cooler
water spray motor. Water will be sprayed into the inter-cooler to cool intake
air, and filling efficiency will improve.•Malfunction of the inter-cooler water
spray switch.
•Malfunction of the inter-cooler water
spray relay.
•Malfunction of the inter-cooler water
spray motor.
•Circuit break, short circuit or a faulty
connection in the inter-cooler water
spray relay circuit.
•Circuit break, short circuit or a faulty
connection in the inter-cooler water
spray switch circuit.
•Malfunction of the ignition switch.
•Malfunction of the engine ECU.
Replace the engine ECU
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
OKNGRepair
Repair

13A-20MPI – TROUBLESHOOTING
Measure at the inter-cooler water
spray relay connector C-220
•Undo the connector, and
measure on the harness side
•Voltage across earth 3 and 1
(ignition switch: ON)
OK:battery voltage
Measure at the engine ECU
connector C-50
•Undo the connector, and
measure on the harness side
•Voltage across earth 56
(ignition switch: ON)
OK:battery voltage
Check connector:C-31
Inspect the harness between the
inter-cooler water spray relay and
the inter-cooler water spray motor
•Check if the power supply wire
is cut, has short circuited, or is
damaged
Inspect the harness between the
inter-cooler water spray motor
and earth
•Check if the earth wire is cut, or
damaged
Check connectors C-209,
C-210, C-201 and C-208
Inspect the harness between the
inter-cooler water spray relay and
the ignition switch
•Check if the power supply wire
is damaged
Check connectors C-22 & C-50
Inspect the harness between the
inter-cooler water spray relay and
the engine ECU
•Check if the signal wire is
damaged
Check connector:A-34
Replace the engine ECU
Check the inter-cooler water
spray motor (Ref Section 15:
Intake/Exhaust)
Check connectorsC-209, C-210, C-201 and C-208
Inspect the harness between the inter-cooler water spray
relay and the ignition switch
•Check if the power supply wire is cut or has short circuited
Continued from the previous page
Check the ignition switch (Ref to Section 54)
Check connectorsC-22 and C-208
Inspect the harness between the inter-cooler water spray
relay and the engine ECU
•Check if the signal wire is cut or has short circuited
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
NGNG
NG
NGNG
NG
NG
NG
NG
NG
NG
NG
NG
NG
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair

13A-25MPI – TROUBLESHOOTING 13A-24
7-2 Table showing resistance and continuity across the
terminals of harness side connectors





8. Checks using an oscilloscope
Sensor output signals and actuator drive signals can be
checked visually by taking waveform measurements using an
oscilloscope.
crank
angle
sensor
connectorexhaust cam position
sensor connector
oscilloscope8.1 Exhaust cam position sensor and the crank angle
sensor

(1) Disconnect the exhaust cam position sensor connector, and
connect the special test harness (MB991709) in its place.
(2) Disconnect the crank angle sensor connector, and connect
the special test harness (MB998478) in its place.
(3) Connect the No.2 terminal of the exhaust cam position
sensor connector and the No.2 terminal (the black coloured
clip on the special tool) of the crank angle sensor
connector, to the probes for each channel on the
oscilloscope.
Note
When measuring at the engine ECU connector, connect the
probes for each channel on the oscilloscope to No.50
terminal (exhaust cam position sensor), and to No.43
terminal (crank angle sensor).

13A-26MPI – TROUBLESHOOTING

Observation conditions
Exhaust cam position sensorCrank angle sensor
Probe switchX1x1
AC-GND-DCDCDC
TIME/DIV.10ms10 ms
VOLTS/DIV.2V2V
Other--
EngineIdling
2 engine revolutions (1 camshaft revolution)
crank angle
sensor
output
waveform
exhaust cam
position sensor
output
waveform
Standard waveform

•The exhaust cam position sensor detects the compression top dead centre for each cylinder, and by simultaneous
observation of these and other controlling signals, it is possible to distinguish between the cylinders.
•The crank angle sensor detects the crank angle for each cylinder. There is an output of 4 evenly spaced crank angle sensor
HIGH signals for every 2 revolutions of the engine. Therefore, by measuring the cycle time (seconds), engine revolution
speed can calculated according to the following formula:
Engine revolution speed = 2/4T (seconds) x 60 = 30/T (seconds)

•Check that the cycle time gets shorter as the engine revolution speed increases.

13A-28MPI – TROUBLESHOOTING
Standard waveform
2 engine revolutions (1 camshaft revolution)
crank angle
sensor output
waveform
exhaust cam
position sensor
output waveform(cam reset angle)
(cam most advanced angle)
(phase-
angle)

•The intake cam position sensor detects the position of the inlet camshaft. The notch located on the intake side of the
camshaft creates 4 output pulses for each revolution of the camshaft.
•When the time difference between the rise and fall of the output waveform from the crank angle sensor and the rise and fall
of the output waveform from the intake cam position sensor is long the cam is at the reset angle, when the time difference is
short the cam is at the most advanced angle.
Note
When the cam is at the most advanced angle, the rise and fall of the output waveform from the intake cam position sensor
should be at an advancing angle of about 60°.

•As engine revolutions approach 2500r/min, check that the time difference (T) between the rise and fall of the output
waveform from the crank angle sensor, and the rise and fall of the output waveform from the intake cam position sensor, gets
shorter.

•Example 1
Waveform characteristics
Arectangular waveform is produced even though the
engine has not been started.
Cause of the problem
Sensor interface fault

13A-29MPI – TROUBLESHOOTING, ON-VEHICLE SERVICING
•Example 2
Waveform characteristics
The waveform is displaced to the left or the right.
Cause of the problem
The timing belt is loose
There is an abnormality in the fuel pump camshaft
On-vehicle servicing
1. Adjusting standard engine revolutions
when idling
The standard engine revolutions when idling have been
changed. All other servicing requirements are the same as
before.
Standard engine revolutions when idling: 800 ± 50 r/min
NameCodeNameCode
Intake cam position sensorCOil feeder control valveA
Air temperature sensorBManifold absolute pressure sensorB
Exhaust cam position sensorC
2. Layout diagram for MPI system components
air temp. sensor side
connector
air temp.
sensor
3. Inspection of the air temperature sensor
(1) Disconnect the air temperature sensor connector.
(2) Measure the resistance across the terminals of the air
temperature sensor connector.
Standard values:
13~18 kΩ (when at -20 ºC)
5.1~6.9 kΩ (when at 0 ºC)
2.0~3.0 kΩ (when at 20 ºC)
0.9~1.5 kΩ (when at 40 ºC)
0.40~0.78 kΩ (when at 60 ºC)
0.23~0.42 kΩ (when at 80 ºC)