Mitsubishi Pajero Pinin. Manual - part 122

 

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Mitsubishi Pajero Pinin. Manual - part 122

 

 

MPI <4G9> – 

Troubleshooting

13C-74

DATA LIST REFERENCE TABLE

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

NOTE
*1. In a new vehicle [driven approximately 500 km or less], the air flow sensor output frequency is sometimes

10 % higher than the standard frequency.

*2. The injector drive time represents the time when the cranking speed is at 250 r/min or below when

the power supply voltage is 11 V.

*3. In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10 %

longer than the standard time.

*4. In a new vehicle [driven approximately 500 km or less], the step of the stepper motor is sometimes

30 steps greater than the standard value.

L

It will not be displayed when service data of the check mode is selected.

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

11

Oxygen
sensor
(front)

Engine: After having

warmed up

Air/fuel mixture is made
leaner when decelerat

When at 4,000 r/min,
engine is suddenly
decelerated

200 mV or less

Code No.
P0130

13C-25

leaner when decelerat-
ing, and is made richer
when racing.

When engine is sud-
denly raced

600 – 1,000 mV

Engine: After having

 warmed up

The oxygen sensor
signal is used to check

Engine is idling

400 mV or less
(Changes)
600 – 1,000 mV

signal is used to check
the air/fuel mixture
ratio, and control con-
dition is also checked
by the ECU.

2,500 r/min

12

Air flow sen-
sor*

1

D

Engine coolant
temperature: 
80

95

_

C

Engine is idling

12 – 38 Hz

80  – 95

_

C

D

Lamps, electric
cooling fan and all

2,500 r/min

58 – 98 Hz

cooling fan and all
accessories: OFF

D

Transmission:
Neutral 
(A/T: P range)

Engine is raced

Frequency in-
creases in re-
sponse to racing

13

Intake air
temperature
sensor

Ignition switch: ON or
with engine running

When intake air tem-
perature is –20

_

C

–20

_

C

Code No.
P0110

13C-18

sensor

When intake air tem-
perature is 0

_

C

0

_

C

When intake air tem-
perature is 20

_

C

20

_

C

When intake air tem-
perature is 40

_

C

40

_

C

When intake air tem-
perature is 80

_

C

80

_

C

MPI <4G9> – 

Troubleshooting

13C-75

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

14

Throttle
position

Ignition switch: ON

Set to idle position

535 – 735 mV

Code No.
P0120

13C-22

position
sensor

Gradually open

Increases in pro-
portion to throttle
opening angle

P0120

Open fully

4,750 mV or more

16

Power sup-
ply voltage

Ignition switch: ON

System voltage

Procedure
No. 25

13C-68

18

Cranking
signal 

Ignition switch: ON

Engine: Stopped

OFF

Procedure
No. 28

13C-71

signal 
(ignition
switch-ST)

Engine: Cranking

ON

No. 28

21

Engine cool-
ant tempera-
ture sensor

Ignition switch: ON or
with engine running

When engine cool-
ant temperature is
–20

_

C

–20

_

C

Code No.
P0115

13C-20

When engine cool-
ant temperature is
0

_

C

0

_

C

When engine cool-
ant temperature is
20

_

C

20

_

C

When engine cool-
ant temperature is
40

_

C

40

_

C

When engine cool-
ant temperature is
80

_

C

80

_

C

22

Crank angle
sensor

D

Engine: Cranking

D

Tachometer: 
Connected

Compare the engine
speed readings on
the tachometer and
the MUT-

II

.

Accord

Code No.
P0335

13C-33

D

Engine: Idling

D

Idle position
switch: ON

When engine cool-
ant temperature is
–20

_

C

1,380 – 1,580
r/min

When engine cool-
ant temperature is
0

_

C

1,320 – 1,520 
r/min

When engine cool-
ant temperature is
20

_

C

1,200 – 1,400 
r/min

When engine cool-
ant temperature is
40

_

C

1,100 – 1,300 
r/min

When engine cool-
ant temperature is
80

_

C

600 – 800 r/min

MPI <4G9> – 

Troubleshooting

13C-76

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

24

Vehicle
speed 
sensor

Drive at 40 km/h

Approximately 
40 km/h

Code No.
P0500

13C-39

25

Barometric
pressure

Ignition switch: ON

At altitude of 0 m

101 kPa

Code No.
P0105

13C-16

pressure
sensor

At altitude of 600 m

95 kPa

P0105

At altitude of 1,200 m

88 kPa

At altitude of 1,800 m

81 kPa

27

Power steer-
ing fluid
pressure

Engine: Idling

Steering wheel sta-
tionary

OFF

Code No.
P0551

13C-43

pressure
switch

Steering wheel turn-
ing

ON

28

A/C switch

Engine: Idling

A/C switch: OFF

OFF

Procedure
No 29

13C-72

A/C
switch:
ON

A/C com-
pressor
does not
operate

OFF

No. 29

A/C com-
pressor
operates

ON

29

Inhibitor
switch

Ignition switch: ON

P or N

P or N

Procedure
No 28

13C-71

switch
<A/T>

D, 2, L or R

D, 2, L or R

No. 28

41

Injectors*

2

Engine: Cranking

When engine cool-
ant temperature is
0

_

C (injection is car-

ried out for all cylin-
ders simultaneously)

14 – 21 ms

When engine cool-
ant temperature is
20

_

C

30 – 45 ms

When engine cool-
ant temperature is
80

_

C

6.9 – 10.4 ms

Injectors*

3

D

Engine coolant
temperature: 
80 – 95

_

C

Engine is idling

1.6 – 2.8 ms

80  –  95

_

C

D

Lamps, electric
cooling fan and all
accessories: OFF

2,500 r/min

1.4 – 2.6 ms

accessories:  OFF

D

Transmission:
Neutral 
(A/T: P range)

When engine is sud-
denly raced

Increases

MPI <4G9> – 

Troubleshooting

13C-77

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

44

Ignition coils
and power
transistors

D

Engine: After hav-
ing warmed up

D

Timing lamp is set.
(The timing lamp

Engine is idling

2 – 18

_

BTDC

Code No.
P0300

(The  timing  lamp
is set in order to
check actual igni-
tion timing.)

2,500 r/min

23 – 43

_

BTDC

45

ISC (step-
per) motor
position*

4

D

Engine coolant
temperature: 
80  – 95

_

C

D

Lamps, electric

A/C switch: OFF

2 – 25 STEP

D

Lam s, 

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 com-
pressor 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

A/C switch: OFF

OFF

Proce-
dure

No

13C-72

warmed up/Engine  is
idling

A/C
switch:
ON

A/C com-
pressor is
not driven

OFF

dure  No.
29

A/C com-
pressor is
driven

ON

Proce-
dure No.
29

13C-72

59

Oxygen
sensor
(rear)

D

Transmission: 
2nd gear <M/T>,
L range <A/T>

D

Drive with throttle
widely open

3,500 r/min

600 – 1,000 mV

Code No.
P0316

13C-27

24

L

Vehicle
speed sen-
sor

Drive at 40 km/h

Approximately 40
km/h

Code No.
P0500

13C-39

81

L

Long-term
fuel com-
pensation

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

–12.5 – 12.5 %

Code No.
P0170

13C-29

82

L

Short-term
fuel com-
pensation

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

–25 – 25 %

Code No.
P0170

13C-29

87

L

Calculation
load value

Engine: Warm

Engine: Idling

10 – 30 %

load value

2,500 r/min

17 – 37 %

88

L

Fuel control
condition

Engine: Warm

2,500 r/min

Closed loop

Code No.
P0125

13C-24

condition

When engine is sud-
denly raced

Open loop – drive
condition

P0125

 

 

 

 

 

 

 

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