2005 MITSUBISHI LANCER EVOLUTION IX check engine

13A-9MPI – TROUBLESHOOTING
Check connector B-115
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Check connectorB-19X
Measurements taken at engine
ECU connector C-50
•Measurement of voltage at
engine ECU terminals
•Undo the B-115 exhaust cam
position sensor connector
•Ignition switch: ON
•Voltage across earth at 50
OK: 4.9~5.1V
Inspect the harness between the
exhaust cam position sensor and
the engine control relay, repair if
necessary
•Check if the power supply wire
is cut or has short circuited
Inspect the harness between the
exhaust cam position sensor and
the engine ECU
•Check if the output wire has
short circuited
Check that the problem has been
solved
Check connectorC-50
Check connectorC-50
Inspect the harness between the
exhaust cam position sensor and
the engine ECU, repair if
necessary
•Check if the output wire is cut
Temporary malfunction (Ref
Section : Dealing with temporary
malfunctions)
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Measurements taken at the B-115
connector of the exhaust cam
position sensor
•Undo the connector and take
measurements using the
harness
(1) Voltage across earth at 3
(ignition switch: ON)
OK:battery voltage
(2) Voltage across earth at 2
(ignition switch: ON)
OK:4.9~5.1V
(3) Resistance across earth at 1
OK:Less than 2Ω
NGRepair
Repair
OK
NG
OK
OK
NG
OK
NG
NG
OK
NGNG
NGOK
Inspect the harness between the
exhaust cam position sensor and
the engine ECU
•Check if the earth wire is cut or
damaged
Check connectorC-49
OK
OK
Replace engine ECU
NG
Check the problem has been
solved
Replace engine ECU
NG
OK
(1) NG
(2) NG
(3) NG
OK
OK
Repair
Repair
Repair
Repair
Repair
Code No.P0340 Exhaust cam position sensor systemProbable cause of the malfunction
Conditions for inspection
•Ignition switch: ON
•With engine cranking or running
Evaluation conditions
•The sensor output voltage does not change for 4 seconds (with no input of
pulse signals)•Malfunction of the exhaust cam position
sensor
•Broken circuit or short circuit in the exhaust
cam position sensor circuit, or poor connector
contact
•Malfunction of engine ECU

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-11MPI – TROUBLESHOOTING
Check connectorB-33
To next page
Check connectorsB-19X & C-23
Inspect the harness between the
intake cam position sensor and
the engine control relay, repair if
necessary
•Check if the power supply wire
is cut or has short circuited
Measurements taken at engine
ECU connector C-50
•Measurement of voltage at
engine ECU terminals
•Undo the B-33 intake cam
position sensor connector
•Ignition switch: ON
•Voltage across earth 53
OK:4.9~5.1V
Check connectorC-50
Check connectorC-49
Inspect the harness between the
intake cam position sensor and
the engine ECU
•Check if the earth wire is cut or
damaged
Harness inspection between the
intake cam position sensor and
the engine ECU
•Check if the earth wire is cut or
damaged
Replace the engine ECU
Replace engine ECU
Check that the problem has been
solved
Check that the problem has been
solved
Check connector C-50
Inspect the harness between the
intake cam position sensor and
the engine ECU, repair if
necessary
•Check if the output wire is cut
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Measurements taken at the B-33
connector of the intake cam
position sensor
•Undo the connector and take
measurements using the
harness
(1) Voltage across earth at 3
(ignition switch: ON)
OK:battery voltage
(2) Voltage across earth at 2
(ignition switch: ON)
OK:4.9~5.1V
(3) Resistance across earth at 1
OK:Less than 2Ω
Code No.P1012 Intake cam position sensor systemProbable cause of the malfunction
Conditions for inspection
• With engine cranking or running
Evaluation conditions
• Sensor output voltage does not change for 4 seconds (with no input of
pulse signals)•Malfunction of the intake cam position sensor
•Broken circuit or short circuit in the intake
cam position sensor circuit, or poor
connector contact
•Malfunction of engine ECU
OK
OK
NG
(1) NG
(2) NG
(3) NG
OK
NG
NG
OK
OK
OK
NG
NG
NG
OK
NG
OK OK
NG
NG
OK
OKNG
Repair
Repair
Repair
Repair
Repair
Repair
Repair

13A-12MPI – TROUBLESHOOTING
Continued from the previous page
Check connectors B-19X & C-23
Check the intake cam position
sensing cylinder
Check that the problem has been
solved
Replace the intake cam position
sensor
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Replace the intake cam position
sensing cylinder
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Inspect the harness between the
intake cam position sensor and
the engine ECU
•Check if the output wire is
damaged
Inspect the harness between the
intake cam position sensor and
the engine control relay
•Check if the power wire is
damaged
Measurement of the output wave
at the intake cam position
sensor connector B-33 (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.
Replace engine ECU
Check that the problem has been
solved
Check connectorsC-49 & C-50
OK
OKOK
NG
NG
OK
OK
OK
OK
OK
NG
NG
Repair
NG
Repair
NG
Repair
NG
NG
OK
Repair

13A-13MPI – TROUBLESHOOTING
Replace the engine ECU
Check connectors B-19X & C-23
Check connector B-134
Check connectors B-19 & C-23
Check connector C-49
Check that the problem has been
solved
Inspect the oil feeder control
valve by itself (Ref: P13A-30)
Inspect the harness between the
engine control relay and the oil
feeder control valve, repair if
necessary
•Check for damage to the power
supply wire
Inspect the harness between the
engine control relay and the oil
feeder control valve, repair if
necessary
•Check if the power supply wire
is cut or has short circuited
Check connectorC-49
Inspect the harness between the
engine ECU and the oil feeder
control valve, repair if necessary
•Check if the output wire is cut or
has short circuited
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Replace the oil feeder control
valve
A-134 Measurement of the oil
feeder control valve
•Measure using a harness
connected to the connector
•Ignition switch: ON
•Voltage across earth at 1
OK:battery voltage
C-49 Measurement of engine
ECU
•Undo the connector and
measure on the harness side
•Ignition switch: ON
•Voltage across earth at 32
OK:battery voltage
Inspect the harness between the
engine ECU and the oil feeder
control valve
•Check for damage to the output
wire
OK
NG
OKOK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Code No.P1021 Oil feeder control valve systemProbable cause of the malfunction
Conditions for inspection
•Oil feeder control valve: OFF
Evaluation conditions
•Operational terminal voltage of the oil feeder control valve in the ECU is
abnormal for 4 seconds•Malfunction of the oil feeder control
valve
•Broken circuit or short circuit in the oil
feeder control valve circuit, or poor
connector contact
•Malfunction of engine ECU

13A-14MPI – TROUBLESHOOTING
MUT-II/III Service data
•No.25: atmospheric sensor
(Ref: P13A-83) *Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Check connectorC-50
Check connectorC-50
Check connector C-49
Check connectorB-08
Go on to the next page
Inspect the harness between the
AFS and the engine ECU
•Check if the power supply wire
has short circuited
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Inspect the harness between the
AFS and the engine ECU, repair
if necessary
•Check if the power supply wire
is cut
MUT-II/III Service data
•No.25: atmospheric sensor
(Ref: P13A-83) *
Inspect the harness between the
AFS and the engine ECU
•Check if the earth wire is cut or
damaged
MUT-II/III Service data
•No.25: atmospheric sensor
(Ref: P13A-83) *
Replace the engine ECU
Replace the engine ECU
Measurement at B-08 AFS
connector
•Undo the connector and
measure on the harness side.
(1) Voltage across earth at 1
(ignition switch: ON)
OK:4.9~5.1V
(2) Resistance across earth at 5
OK:Less than 2ΩMeasurement at C-50 engine
ECU connector
•Measure the voltage at the
engine ECU terminals
•Ignition switch: ON
•Voltage across earth at 42
OK:4.9~5.1V
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
Code No.P2226 Atmospheric pressure sensor systemProbable cause of the malfunction
Conditions for inspection
•Ignition switch: ON
•Wait for 2 seconds after the ignition switch has been turned on or the
engine has started.
Evaluation conditions
•Output voltage from the sensor is more than 4.5V (when atmospheric
pressure is in excess of 114kPa) for 4 seconds.
Or,
•Output voltage from the sensor is more than 0.2V (when atmospheric
pressure is less than 5kPa) for 4 seconds.•Malfunction of the atmospheric pressure
sensor
•Broken circuit or short circuit in the
atmospheric pressure sensor circuit, or poor
connector contact
•Malfunction of engine ECU
NG
OK
OK
NG
(1) NG
(2) NG
OK
Repair
Repair
Repair
Repair
OK
NG
OK
OK
NG
OK
OK
NG
OK
OK
NG
NG
NG
NG
OKNGRepair
Repair

13A-15MPI – TROUBLESHOOTING
Continued from previous page
Measurements taken at B-08 AFS
connector
•Only connect the test harness
(MB991709) to terminals
No.1, No.2 and No.5 of the
connector and measure at the
pick up harness component.
•Ignition switch: ON
(1) Voltage across earth at 1
OK:4.9~5.1V
(2) Voltage across earth at 2
OK:altitude 0m 3.8~4.2V
altitude 600m 3.5~3.9V
altitude 1200m 3.3~3.7V
altitude 1800m 3.0~3.4V
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
Replace the AFS
Check connectorC-50
Replace the engine ECU
Inspect the harness between AFS
and engine ECU, repair if
necessary
•Check if the output wire is cut or
damaged
Temporary malfunction (Refer to
Section 00: Dealing with
temporary malfunctions)
Check connectorsC-49 & C-50
Inspect the harness between AFS
and engine ECU
•Check if the output wire has
short circuited or is damaged
Inspect the harness between AFS
and engine ECU, repair if
necessary
•Check if the power supply wire
is damaged
MUT-II/III Service data
•No.25: atmospheric sensor
(Ref: P13A-83) *
Measurement at the C-50 engine
ECU connector
•Measurement of the terminal
voltage of the engine ECU
•Ignition switch: ON
•Voltage across earth at 51
OK:altitude 0m 3.8~4.2V
altitude 600m 3.5~3.9V
altitude 1200m 3.3~3.7V
altitude 1800m 3.0~3.4V
Check connectorC-50
Check connectorC-50
OK
OK
OK
OK
OK
NG
(1) NG
(2) NG
NG
NG
OK
NG
NG
NG
OK
OK
OK
NG
Repair
Repair
Repair
Repair
Repair

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