Mitsubishi Lancer Evolution 7. Manual — part 202
MPI -
Troubleshooting
13A-107
ACTUATOR TEST REFERENCE TABLE
Item
No.
Inspection
item
Drive contents
Inspection contents
Normal condition
Inspection
procedure
No.
Reference
page
01
Injectors
Cut fuel to No.
1 injector
Engine: After having warmed
up/Engine is idling
(C t th f l
l t
h
Idling condition
becomes different
(becomes unsta
Code No.
P0201
13A-30
02
Cut fuel to No.
2 injector
(Cut the fuel supply to each
injector in turn and check
cylinders which don’t affect
idli
)
(becomes unsta-
ble).
Code No.
P0202
13A-31
03
Cut fuel to No.
3 injector
y
idling.)
Code No.
P0203
13A-32
04
Cut fuel to No.
4 injector
Code No.
P0204
13A-33
07
Fuel pump
Fuel pump
operates and
fuel is recircu-
lated.
D
Engine:
Cranking
D
Fuel
pump:
Forced
driving
Inspect
according
Pinch the
return hose
with fingers
to feel the
pulse of the
fuel being
recirculated.
Pulse is felt.
Procedure
No. 23
13A-85
according
to both
the above
conditions.
Listen near
the fuel tank
for the
sound of
fuel pump
operation.
Sound of opera-
tion is heard.
08
Purge
control
solenoid
valve
Solenoid valve
turns from
OFF to ON.
Ignition switch: “ON”
Sound of opera-
tion can be heard
when solenoid
valve is driven.
Code No.
P0443
13A-41
09
Fuel
pressure
control
solenoid
valve
Solenoid valve
turns from
OFF to ON.
Ignition switch: “ON”
Sound of opera-
tion can be heard
when solenoid
valve is driven.
Code No.
P1105
13A-48
10
EGR con-
trol sole-
noid valve
Solenoid valve
turns from
OFF to ON.
Ignition switch: “ON”
Sound of opera-
tion can be heard
when solenoid
valve is driven.
Code No.
P0403
13A-39
12
Waste
gate sole-
noid valve
Solenoid valve
turns from
OFF to ON.
Ignition switch: “ON”
Sound of opera-
tion can be heard
when solenoid
valve is driven.
Code No.
P1104
13A-47
13
Fuel pump
relay 3
Fuel pump
relay 3 turns
from OFF to
ON.
D
Ignition switch: “ON”
D
Listen near the fuel tank
for the sound of fuel pump
operation.
Sound of opera-
tion is heard.
Procedure
No. 23
13A-85
17
Basic igni-
tion timing
Set to ignition
timing
adjustment
mode
Engine: Idling
Timing light is set
5_BTDC
-
-
MPI -
Troubleshooting
13A-108
Item
No.
Reference
page
Inspection
procedure
No.
Normal condition
Inspection contents
Drive contents
Inspection
item
21
Fan
controller
Radiator fan
motor is
driven.
Ignition switch: “ON”
Fan motor rotates
at high speed.
Procedure
No. 24
13A-87
36
Secondary
air control
solenoid
valve
Solenoid valve
turns from
OFF to ON.
Ignition switch: “ON”
Sound of opera-
tion can be heard
when solenoid
valve is driven.
Procedure
No. 29
13A-96
37
Condenser
fan (HI)
Condensor
fan motor is
driven.
Ignition switch: “ON”
Fan motor rotates
at high speed.
Procedure
No. 25
13A-89
38
Condenser
fan (LOW)
Second air
control
solenoid valve
Ignition switch: “ON”
Fan motor rotates
at low speed.
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
1. Connect a needle-nosed wire probe (test harness:
MB991223 or paper clip) to a voltmeter probe.
2. Insert the needle-nosed wire probe into each of the
engine-ECU connector terminals from the wire side, and
measure the voltage while referring to the check chart.
NOTE
(1) Make the voltage measurement with the engine-ECU
connectors connected.
(2) You may find it convenient to pull out the engine-ECU
to make it easier to reach the connector terminals.
(3) The checks can be carried out off the order given
in the chart.
Caution
Short-circuiting the positive (+) probe between a
connector terminal and earth could damage the
vehicle wiring, the sensor, engine-ECU or all of them.
Be careful to prevent this!
3. If voltmeter shows any division from standard value, check
the corresponding sensor, actuator and related electrical
wiring, then repair or replace.
4. After repair or replacement, recheck with the voltmeter
to confirm that the repair has corrected the problem.
Needle-nosed wire probe
MPI -
Troubleshooting
MPI -
Troubleshooting
13A-109
Engine-ECU Connector Terminal Arrangement
Terminal No. Check item
Check condition (Engine condition)
Normal condition
1
No. 1 injector
While engine is idling after having warmed up,
suddenly depress the accelerator pedal
From 11- 14 V, momentarily
drops slightly
14
No. 2 injector
suddenly depress the accelerator pedal.
drops slightly
2
No. 3 injector
15
No. 4 injector
3
Fuel pressure control
solenoid valve
Ignition switch: “ON”
System voltage
solenoid valve
Engine: Cranking → Idle operation
(within approximately 2 minutes or less)
1 V or less → System voltage
4
Stepper motor coil
<A1>
Engine: Soon after the warmed up engine is
started
System voltage ↔ 0 - 6 V
(Changes repeatedly)
17
Stepper motor coil
<A2>
5
Stepper motor coil
<B1>
18
Stepper motor coil
<B2>
6
EGR control solenoid
valve
Ignition switch: “ON”
System Voltage
valve
While engine is idling, suddenly depress the
accelerator pedal.
From system voltage,
momentarily drops
8
A/C relay
D
Engine: Idle operation
D
A/C switch: OFF → ON (A/C compressor
System voltage or momen-
tarily 6 V or more → 1 V or
D
A/C switch: OFF → ON (A/C compressor
runs)
tarily 6 V or more → 1 V or
less
9
Purge control sole-
noid valve
Ignition switch: “ON”
System voltage
noid valve
Engine: Idle operation
1 V or less
10
Ignition coil - No.1,
No.4
Engine speed: 3,000 r/min
0.3 - 3.0 V
23
Ignition coil - No.2,
No.3
11
Waste gate solenoid
valve
Ignition switch: “ON”
System voltage
valve
Engine: After warm-up, idle operation
(When using premium gasoline)
1 V or less
MPI -
Troubleshooting
13A-110
Terminal No.
Normal condition
Check condition (Engine condition)
Check item
12
Power supply
Ignition switch: “ON”
System voltage
25
19
Air flow sensor reset
signal
Engine: Idle operation
0 - 1 V
signal
Engine speed: 3,000 r/min
6 - 9 V
21
Fan controller
Radiator fan is not operating
0 - 0.3 V
Radiator fan is operating
0.7 V or more
22
Fuel pump relay 2
Ignition switch: “ON”
System voltage
Engine: Idle operation
1 V or less
24
A/C load signal
D
Engine:
Idle operation
D
A/C switch: ON
(A/C compressor
runs)
D
Outdoor air
sensor ambient
temperature:
18_C or more
D
A/C setting
temperature:
Minimum
temperature
D
A/C air volume:
Maximum
1 V or less
D
A/C setting
temperature:
indoor
temperature
D
A/C air volume:
Minimum
System voltage
32
Condenser fan motor
relay (HI)
Fan inactive state
(Engine coolant temperature: 90_C or less)
System voltage
Fan high-speed rotation state
(Engine coolant temperature: 105_C or more)
1 V or less
33
Alternator G terminal
D
Engine: After warm-up, idle operation
D
Radiator fan: Not operating
D
Headlamp: OFF → ON
D
Stop lamp: OFF → ON
D
Rear defogger switch: OFF → ON
Voltage increases by
0.2 - 3.5 V
34
Condenser fan motor
relay (LOW)
Fan inactive state
(Engine coolant temperature: 90_C or less)
System voltage
Fan low-speed rotation state (Engine coolant
temperature: 95 - 100_C or more)
1 V or less
35
Intercooler water
spray lamp
Ignition switch: “ON”
System voltage
spray lamp
Ignition switch: “LOCK” (OFF)
1 V or less
36
Engine warning lamp
Ignition switch: “LOCK” (OFF) → “ON”
1 V or less → System
voltage (After several se-
conds have elapsed)
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