Mitsubishi Lancer Evolution VI. Manual — part 43

MPI –

Troubleshooting

13-60

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

44

Ignition coils
and power
transistors
<EVOLU-

D

Engine: After
having warmed up

D

Timing lamp is set.
(The timing lamp

Engine is idling

3

_

ATDC –

13

_

BTDC

–

–

TION-IV>

(

t

g

p

is set in order to
check actual
ignition timing.)

2,500 r/min

24 – 44

_

BTDC

44

Ignition coils
and power
transistors

D

Engine: After
having warmed up

D

Timing lamp is set

Engine is idling

0 – 13

_

BTDC

–

–

transistors
<EVOLU-
TION-V, VI>

D

Timing lamp is set.

2,500 r/min

24 – 44

_

BTDC

45

ISC
(stepper)
motor
position *

D

Engine coolant
temperature: 80 –
90

_

C

D

Lamps, electric

A/C switch: OFF

2 – 25 steps

–

–

position

D

Lamps,

electric

cooling fan and all
accessories: OFF

D

Transmission:
Neutral (A/T :
P range)
Idl

iti

A/C switch:
OFF

→

ON

Increases by
10 – 70 steps

g )

D

Idle position
switch: ON

D

Engine: Idling

D

When A/C switch
is ON, A/C
compressor should
be operating

D

A/C switch: OFF

D

Select lever:
N range

→

D range

Increases by
5 – 50 steps

49

A/C relay

Engine: After having
warmed up/Engine is
idling

A/C switch: OFF

OFF (Compressor
clutch is not
operating)

Procedure
No. 29

13-39

A/C switch: ON

ON (Compressor
clutch is
operating)

NOTE
*:

In a new vehicle [driven approximately 500 km or less], the stepper motor has sometimes 30 steps
greater than the standard value.

Caution
When shifting the select lever to D range, the brakes should be applied so that the vehicle does
not move forward.

MPI –

Troubleshooting

13-61

8. 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

Idling condition
becomes different
(becomes unsta

Code No.
41

13-15

02

Cut fuel to No.
2 injector

up/Engine is idling
(Cut the fuel supply to each
injector in turn and check

li d

hi h d

’

ff

(becomes unsta-
ble, resulting in
engine stall).

03

Cut fuel to No.
3 injector

j

cylinders which don’t affect
idling.)

04

Cut fuel to No.
4 injector

07

Fuel pump

Fuel pump
operates and
fuel is recircu-
lated.

D

Engine:
Cranking

D

Fuel
pump:
Forced
driving

Inspect ac-
cording to

Pinch the
return hose
with fingers
to feel the
pulse of the
fuel being
recirculated.

Pulse is felt.

Procedure
No. 25

13-36

cording to
both the
above condi-
tions.

Listen near
the fuel tank
for the
sound of
fuel pump
operation.

Sound of opera-
tion is heard.

09

Fuel
pressure
control
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. 34

13-45

12

Waste
gate
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. 35

13-45

13

Fuel pump
relay No.2

Turn fuel
pump relay
No.2 from
OFF to ON.

D

Ignition switch: ON

D

Listen to pump operation
sound near fuel tank.

Sound of opera-
tion can be heard.

Procedure
No. 25

13-36

17

Basic igni-
tion timing

Set to ignition
timing adjust-
ment mode

D

Engine: Idling

D

Timing light is set

5

_

BTDC

–

–

MPI –

Troubleshooting

13-62

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Drive contents

Inspection
item

20

Radiator
fan
(HIGH),
condenser
fan
(HIGH)*

1

Drive the fan
motors (for
radiator and
condenser*

1

)

D

Ignition switch: ON

D

A/C switch: ON*

1

Fan motors
operate at high
speed.

Procedure
No. 30

13-40

21

Radiator
fan
(LOW),
condenser
fan
(LOW)*

1

Drive the fan
motors (for
radiator and
condenser*

1

)

D

Ignition switch: ON

D

A/C switch: ON*

1

Fan motors
operate at low
speed.

36*

2

Secondary
air control
solenoid
valve

Turn solenoid
valve from
OFF to ON.

Ignition switch: ON

Sound of opera-
tion can be heard
when solenoid
valve is driven.

Procedure
No. 36

13-46

37*

2

A/C con-
denser fan
(HIGH)

Drive A/C
condenser fan
motor

Ignition switch: ON

A/C condenser
fan motor oper-
ates at high
speed.

Procedure
No. 30

13-41

38*

2

A/C con-
denser fan
(LOW)

Drive A/C
condenser fan
motor

Ignition switch: ON

A/C condenser
fan motor oper-
ates at low speed.

NOTE
*

1

: EVOLUTION-IV and EVOLUTION-V

*

2

: EVOLUTION-VI

MPI –

Troubleshooting

13-63

ENGINE-ECU INSPECTION

TERMINAL VOLTAGES

Engine ECU connector

Terminal
No.

Check item

Check condition (Engine condition)

Normal condition

1

No.1 injector

While engine is idling after having been warmed up,
suddenly depress the accelerator pedal

Momentarily drops
slightly from 11

14 V

14

No.2 injector

suddenly depress the accelerator pedal.

slightly from 11 – 14 V.

2

No.3 injector

15

No.4 injector

3

Fuel pressure control
valve

Ignition switch: ON

System voltage

valve

Engine: Cranking to idling (within about two minutes)

0 – 3 V to sytem
voltage

4

Stepper motor coil (A1)

Engine: Immediately after engine has been started
for warming up

Changes repeatedly
from system voltage

17

Stepper motor coil (A2)

for warming up

from system voltage
to 0 – 6 V and from 0

6 V to system

5

Stepper motor coil (B1)

– 6 V to system
voltage.

18

Stepper motor coil (B2)

6

Secondary air control
solenoid valve

Ignition switch: ON

System voltage

8

Fuel pump relay

Ignition switch: ON

System voltage

Engine: Idling

0 – 3 V

10

Power transistor unit
(A)

Engine speed: 3,000 r/min

0.3 – 3.0 V

23

Power transistor unit
(B)

11

Wastegate solenoid
valve

Ignition switch: ON

System voltage

valve

Engine: At idle after having been warmed up (when
premium gasoline is used)

0 – 3 V

12

Power supply

Ignition switch: ON

System voltage

25

19

Air flow sensor reset
signal

Engine: Idling

0 – 1 V

signal

Engine speed: 3,000 r/min

6 – 9 V

20

Fan motor relay (HI)
<EVOLUTION-IV, V>

Fan not operating (coolant temperature: 90

_

C or

below)

System voltage

Fan at high speed (coolant temperature: 105

_

C or

above)

0 – 3 V