Mitsubishi Space Star. Manual — part 70

MPI –

Troubleshooting

13B-67

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

27

Power
steering fluid
pressure

Engine: Idling

Steering wheel
stationary

OFF

Procedure
No. 28

13B-61

pressure
switch

Steering wheel
turning

ON

28

A/C switch

Engine: Idling
(when A/C switch is

A/C switch: OFF

OFF

Procedure
No. 29

13B-62

(when A/C switch is
ON, A/C compressor
should be operating.)

A/C switch: ON

ON

No. 29

32

Vacuum
sensor*

1

Engine coolant
temperature: 80 –
95

C

Engine: Stopped
(At altitude of 0 m)

101 kPa

Code No.
P0105

13B-10

95

C

Lamps, electric
cooling fan and all
accessories: OFF

Engine: Stopped (At
altitude of 600 m)

95 kPa

accessories: OFF

Transmission:
Neutral

Ignition switch: ON

Engine: Stopped (At
altitude of 1,200 m)

88 kPa

Ignition switch: ON

Engine: Stopped (At
altitude of 1,800 m)

81 kPa

Engine: Idling

24.3 – 37.7 kPa

When engine is
suddenly raced

Increases

33

Electrical
load switch

All accessories: OFF

Lighting switch only:
OFF

→

ON

OFF

→

ON

Procedure
No. 30

13B-62

41

Injectors*

2

Engine: Cranking

When engine
coolant temperature
is 0

C (injection is

carried out for all
cylinders
simultaneously)

13 – 23 ms

–

–

When engine
coolant temperature
is 20

C

26 – 46 ms

When engine
coolant temperature
is 80

C

8 – 12 ms

MPI –

Troubleshooting

13B-68

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

41

Injectors*

3

Engine coolant
temperature:
80

95

C

Engine is idling

1.7 – 2.9 ms

–

–

80 – 95

C

Lamps, electric
cooling fan and all

2,500 r/min

1.4 – 2.6 ms

cooling fan and all
accessories: OFF

Transmission:
Neutral

When engine is
suddenly raced

Increases

44

Ignition
coils and
power
transistors

Engine: After
having warmed up

Timing lamp is set.
(The timing lamp is

Engine is idling

0 – 20

BTDC

–

–

transistors

(The timing lamp is
set in order to
check actual
ignition timing.)

2,500 r/min

19 – 39

BTDC

45

ISC
(stepper)
motor
position*

4

Engine coolant
temperature:
80 – 95

C

Lamps, electric
cooling fan and all
accessories: OFF

A/C switch: OFF

2 – 25 STEP

–

–

accessories: OFF

Transmission:
Neutral

Engine: Idling

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

A/C switch:
OFF

→

ON

Increases by
10 – 70 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

13B-62

A/C switch: ON

ON (Compressor
clutch is
operating)

59

Oxygen
sensor
(rear)

Transmission:
2nd gear

Drive with throttle
widely open

3,500 r/min

600 – 1,000 mV

Code No.
P0136

13B-22

MPI –

Troubleshooting

13B-69

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

81

Long-term
fuel com-
pensation

Engine: Warm, 2,500 r/min without any load
(during closed loop)

–12.5 – 12.5 %

Code No.
P0170

13B-25

82

Short-term
fuel com-
pensation

Engine: Warm, 2,500 r/min without any load
(during closed loop)

–17 – 17 %

Code No.
P0170

13B-25

87

Calculation
load value

Engine: Warm

Engine: Idling

20 – 33 %

–

–

load value

2,500 r/min

20 – 33 %

88

Fuel control
condition

Engine: Warm

2,500 r/min

Closed loop

Code No.
P0125

13B-18

condition

When engine is
suddenly raced

Open loop – drive
condition

P0125

A1

Oxygen
sensor
(front)

Engine: After having
warmed up
Air/fuel mixture is
made leaner when
decelerating and is

When at 4,000
r/min, engine is
suddenly deceler-
ated

0.2 V or less

Code No.
P0130

13B-19

decelerating, and is
made richer when
racing.

When engine is
sudden racing

0.6 – 1.0 V

Engine: After having
warmed up
The oxygen sensor
signal is used to
check the air/fuel

Engine is idling

0.4 V or less
(Changes)
0.6 – 1.0 V

check the air/fuel
mixture ratio, and
control condition is
also checked by the
engine-ECU.

2,500 r/min

A2

Oxygen
sensor
(rear)

Transmission: 2nd
gear

Drive with throttle
widely open

3,500 r/min

0.6 – 1.0 V

Code No.
P0136

13B-22

8A

Throttle
position

Ignition switch: ON

Set to idle position

6 – 20 %

Code No.
P0120

13B-16

position
sensor
(Throttle
opening
angle)

Gradually open

Increase in
proportion to
throttle opening
angle

P0120

Open fully

80 – 100 %

MPI –

Troubleshooting

13B-70

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/En-
gine is idling

Idling condition
becomes different
(becomes

unsta

Code No.
P0201

13B-26

02

Cut fuel to No. 2
injector

gine is idling
(Cut the fuel supply to each
injector in turn and check

li d

hi h d

’t

ff

t

(becomes unsta-
ble).

Code No.
P0202

03

Cut fuel to No. 3
injector

j

cylinders which don’t affect
idling.)

Code No.
P0203

04

Cut fuel to No. 4
injector

Code No.
P0204

07

Fuel pump

Fuel pump
operates and
fuel is recircu-
lated.

Engine:
Cranking

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. 26

13B-60

according
to
both the
above
condi-
tions.

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

Sound of operation
is heard.

08

Purge
control
solenoid
valve

Solenoid valve
turns from OFF
to ON.

Ignition switch: ON

Sound of operation
can be heard when
solenoid valve is
driven.

Code No.
P0443

13B-34

10

EGR
control
solenoid
valve

Solenoid valve
turns from OFF
to ON.

Ignition switch: ON

Sound of operation
can be heard when
solenoid valve is
driven.

Code No.
P0403

13B-32

20

Condenser
fan

Drive the fan
motors
(condenser)

Ignition switch: ON

A/C switch: ON

Fan motor runs

Procedure
No. 23

13B-23

21

Radiator
fan

Drive the fan
motors
(radiator)

Ignition switch: ON

Fan motor runs

Procedure
No. 23

13B-23