Content .. 68 69 70 71 ..

Mitsubishi Space Star. Manual - part 70

MPI –

Troubleshooting

13B-67

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

Power
steering fluid
pressure

Engine: Idling

Steering wheel
stationary

OFF

Procedure
No. 28

13B-61

pressure
switch

Steering wheel
turning

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

No. 29

Vacuum
sensor*

Engine coolant
temperature: 80 –
95

Engine: Stopped
(At altitude of 0 m)

101 kPa

Code No.
P0105

13B-10

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

Electrical
load switch

All accessories: OFF

Lighting switch only:
OFF

→

OFF

→

Procedure
No. 30

13B-62

Injectors*

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

26 – 46 ms

When engine
coolant temperature
is 80

8 – 12 ms

MPI –

Troubleshooting

13B-68

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

Injectors*

Engine coolant
temperature:
80

Engine is idling

1.7 – 2.9 ms

–

80 – 95

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

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

ISC
(stepper)
motor
position*

Engine coolant
temperature:
80 – 95

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

→

Increases by
10 – 70 steps

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)

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

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

Short-term
fuel com-
pensation

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

–17 – 17 %

Code No.
P0170

13B-25

Calculation
load value

Engine: Warm

Engine: Idling

20 – 33 %

–

load value

2,500 r/min

20 – 33 %

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

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

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

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

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

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

(becomes unsta-
ble).

Code No.
P0202

Cut fuel to No. 3
injector

cylinders which don’t affect
idling.)

Code No.
P0203

Cut fuel to No. 4
injector

Code No.
P0204

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.

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

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

Condenser
fan

Drive the fan
motors
(condenser)

Ignition switch: ON

A/C switch: ON

Fan motor runs

Procedure
No. 23

13B-23

Radiator
fan

Drive the fan
motors
(radiator)

Ignition switch: ON

Fan motor runs

Procedure
No. 23

13B-23

Content .. 68 69 70 71 ..