ECU MITSUBISHI LANCER EVOLUTION IX 2005 Owner's Manual

13A-23MPI – TROUBLESHOOTING
Continued from the previous page
Measure at the air temperature
sensor connector B-34
•Connect the test harness
(MB991658), to the connector
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
Check that the problem has been
solved
Replace the engine ECU
Inspect the harness between the
air temperature sensor and the
engine ECU and repair it if
necessary.
•Check if the earth wire is
damaged
Check connector: C-51
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
OK
OK
OK
NG
NG
OK
NGRepair

13A-24MPI – TROUBLESHOOTING
13A-23
6. Service data table
7. Engine ECU checks
7-1 Terminal voltage table

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-27MPI – TROUBLESHOOTING

•Example 1
Waveform characteristics
Arectangular waveform is produced even though the
engine has not been started.
Cause of the problem
Sensor interface fault
•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 sensor disc.
8-2 Intake cam position sensor

(1) Disconnect the intake cam position sensor connector and
connect the special test harness (MB991709) in its place.
(All terminals should be connected).
(2) Connect the oscilloscope probe to the No.2 terminal of the
intake cam position sensor connector.
Note
When measuring at the engine ECU connector, connect the
No.53 terminal (intake cam position sensor) to the
oscilloscope probe.
(3) When checking the output signal of the intake cam position
sensor, observe the output signal of the crank angle sensor
at the same time.
crank
angle
sensor
connector
intake cam position
sensor connectoroscilloscope

Observation conditions
Intake cam position sensorCrank angle sensor
Probe switchX1x1
AC-GND-DCDCDC
TIME/DIV.10ms10 ms
VOLTS/DIV.2V2V
Other--
EngineIdling

INTAKE & EXHAUST INTER-COOLER WATER SPRAY
15-3
Fitting guidelines



A 

Fitting the water spray hose ASSY and fixing tape (for securing the water spray hose ASSY)
1. After fitting the water spray hose, the three-way joint and the washer valve, affix pads, clips and tape at the positions
shown in the water spray hose diagram.
2. Fit the water spray hose ASSY to the front bumper using the water spray hose ASSY clip.
3. Affix tape as shown in the diagram, so that the water spray hose ASSY does not slip.
View of the inside of the front bumper
tape
three-way joint
pads
tape
washer
valve
clip
tapeclip
three-way joint
padclip
washer valve
tape
clip
tape
clipclip
water spray hose ASSY
water spray
nozzle brackets
tape

Related Documentation
Cautionary Note regarding servicing of vehicles fitted with SRS airbags and/or seatbelts
with pre-tensioner systems.
Warnings:
1. Incorrect inspection or servicing of a component part of the SRS airbag system or seatbelt pre-tensioner system,
or a part relating to these systems, may cause accidental operation (deployment) of the SRS airbag or seatbelt
pre-tensioners, or may cause these systems to be disabled, leading in either case the risk of serious injury.
2. If parts may be affected by heat during painting operations, then those parts must be removed in advance. This
applies to the SRS-ECU, airbag modules (driver’s sear and front passenger’s seat), clock springs, front impact
sensors, side impact sensors, and pre-tensioner seatbelts.
• 93ºC or above : SRS-ECU, airbag modules (driver’s sear and front passenger’s seat), clock springs, front
impact sensors, side impact sensors
•90ºC or above : Pre-tensioner seatbelts
3. The component parts of the SRS airbag system or seatbelt pre-tensioner system, and parts relating to these
systems, must always be inspected and serviced by a Mitsubishi dealer.
4. Service personnel must read the relevant service manuals (particularly, Section 52B – SRS Airbags) carefully and
thoroughly, before inspecting or servicing the component parts of the SRS airbag system or seatbelt pre-
tensioner system, and parts relating to these systems.

GENERAL INFORMATION - HOW TO READ THE WIRING DIAGRAMS0-5
Indicates input / output to
and from control unit
(direction of current flow).
Input Output Input/Output
Indicates a wiring connector inside a device,
which is not shown in the layout diagrams.
Example :
Indicates a connector
located inside a
device, numbered in
order starting from 1.
Indicates the number of the connector
shown in the layout diagram.
Indicates that these are the same
intermediate connector.
Indicates that the diagram
continues from section [A] in
block [1].
Indicates the terminal No.
If two or more connectors are
connected to the same device, a
broken line between parts indicates
that the same connector is used.
The two-way arrow shows that
current can flow downwards or
upwards, under the control of
the ECU.
Indicates a harness junction point
where the wire changes colour or
diameter.
Indicates an intersection
where the wires are not
connected.
Indicates an intersection
where the wires are
connected
Indicates the representative earth
point on the vehicle body for that
circuit. (This number matches that of
the earth point in the layout diagrams
and the diagrams of individual part
installation positions.)
Indicates a spare connector, if the
corresponding device is not
installed, due to the vehicle
specifications.Indicates the connector part number given in
the harness repair manual. A number in
( ) indicates the part number of the connector
that corresponds to a connector symbol.
Ignition
switch (IG1)
Solenoid
valve 1
Solenoid
valve
2
Solenoid
valve
ASSY
Sensor
MotorRegister

LAYOUT DIAGRAMS - ENGINE COMPARTMENT1-4
A-01 (2-grey) Side turn signal lamp (RH)
A-02 (2-grey) Brake fluid level switch
A-04 (2-grey) Side turn signal lamp (LH)
A-05 (2-black) Front ABS sensor (LH)
A-06X Fog lamp relay or spare connector for fog
lamp relay
A-07X Horn relay
A-08X Condenser fan relay (LO)
A-09X Condenser fan relay (HI)
A-11X Radiator fan control relay
A-12X Front ECUA-13X (11) Front ECU
A-14 (2-black) Junction between front harness (LH) and
control harness
A-16 (2-black) Headlamp (HI : LH)
A-19 (3-grey) Radiator fan controller
A-20 (1-black) Horn (HI)
A-21 (2-brown) External air temperature sensor (vehicle
fitted with fully automatic A/C)
A-22 (1-black) Horn (LO)
A-23 (2-black) Headlamp (HI: RH)
A-28 Spare connector for fog lamp
A-29 Dummy connector
ENGINE COMPARTMENT
Connector Symbol
Front harness (RH)

LAYOUT DIAGRAMS - ENGINE / TRANSMISSION1-8
B-106 (2-grey) Knock sensor
B-108 (2-black) Coolant temperature sensor
B-109 (34-black) ABS-ECU
B-114 (1-black) Water temperature gauge unit
B-115 (3-black) Exhaust cam position sensorB-119 (3-grey) Ignition coil 2
B-122 (3-black) Crank angle sensor
B-123 (3-grey) Ignition coil 1
B-124 (2-black) Fuel pressure solenoid valve
Engine / Transmission (continued)
Connector Symbol
Control harness
Battery harness

LAYOUT DIAGRAMS - INSTRUMENT PANEL1-10
C-01 (4) Register (vehicle with heater, manual
A/C)
C-02 (2-black) Front passenger airbag module (squib)
C-03 (7) Internal / External air switching damper
motor
C-04 (7) Instrument panel harness / A/C harness
junction (vehicle with heater, manual A/C)
(13) Instrument panel harness / A/C harness
junction (vehicle with fully automatic A/C)
C-05 (2) Air thermo sensor (vehicle with fully
automatic A/C)
C-06 (13) J/C (5)
C-07 (22-grey) J/C (5)
C-08 (6) Motor & potentiometer for air mix door
(vehicle with fully automatic A/C)
C-09 (2) Heater water temperature sensor (vehicle
with fully automatic A/C)C-10 (6) Motor and potentiometer for blower
switching damper (vehicle with fully
automatic A/C)
C-13 (4) Clock
C-14 (4) Hazard switch
C-15 (6) Blower switch (vehicle with heater ,
manual A/C)
C-16 (12-black) Heater control unit (vehicle with heater) or
A/C ECU (vehicle with manual A/C)
C-17 (20-black) A/C ECU (vehicle with fully automatic
A/C)
C-18 (16-black) A/C ECU (vehicle with fully automatic
A/C)
C-20 (22-blue) Instrument panel harness / Control
harness junction
C-21 (10-grey) Instruction panel harness / Control
harness junction
INSTRUMENT PANEL
Connector Symbol
A/C harness
Control harness
Floor harness (LH) Front door harness (LH)Front harness (LH)Tweeter sub-harnessInstrument panel harness Front passenger side