Mitsubishi Pajero Pinin. Manual - part 51

GDI – 

Troubleshooting

13A-70

INSPECTION PROCEDURE 33

Stop lamp switch system

Probable cause

The engine-ECU determines whether the brake pedal is depressed or not, by means
of the stop lamp switch input signal.

D

Malfunction of the stop lamp switch

D

Open circuit or short-circuited harness wire in the
stop lamp circuit, or poor connector contact

D

Malfunction of the engine-ECU

NG

NG

NG

Repair

Check the stop lamp switch. (Refer to GROUP 35 – Brake Pedal.)

NG

Replace

OK

Measure at stop lamp switch connector C-04.

D

Disconnect the connector, and measure at the harness side.

D

Voltage between terminal 2 and earth
OK: System voltage

NG

Check the following connector: C-29

OK

Check trouble symptom.

Check the harness wire between the battery and stop lamp switch.

NG

Repair

OK

Measure at engine-ECU connector C-18.

D

Disconnect the connector, and measure at the harness side.

D

Voltage between terminal 63 and earth
(Ignition switch: ON)
OK: 0 – 3 V (when the brake pedal is not depressed)

System voltage (when the brake pedal is depressed)

NG

Check the following connectors: C-02, C-04, C-28

OK

Check trouble symptom.

Check the harness wire between the engine-ECU and stop lamp,
and repair if necessary.

OK

Check the following connector: C-18

NG

Repair

OK

Check trouble symptom.

NG

Replace the engine-ECU.

INSPECTION PROCEDURE 34

Small lamp switch

Probable cause

The engine-ECU determines whether the small lamp switch is on or off.
According to that information, the engine-ECU controls
alternator output current when the vehicle is started.

D

Improper connector contact, open circuit or
short-circuited harness wire in the taillamp relay
circuit

D

Malfunction of the engine-ECU

NG

Replace the engine-ECU.

OK

Check the trouble symptoms.

OK

Check the following connector: C-19

NG

Repair

Measure at the engine-ECU connector C-19.

D

Disconnect the connector, and measure at the harness
side.

D

Voltage between 88 and earth
(Lighting switch: ON)
OK: System voltage

NG

Check the taillamp relay circuit. (Refer to ELECTRICAL WIRING.)

GDI – 

Troubleshooting

13A-71

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

: Within four minutes after starting the engine

*

2

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

than the standard time.

*

3

: The accelerator pedal position switch normally turns off when the voltage of the accelerator pedal

position sensor (1st channel) is 250 – 550 mV higher than the voltage at the idle position. If the accelerator
pedal position switch turns back on after the accelerator pedal position sensor voltage has risen by
100 mV and the throttle valve has opened, the accelerator pedal position switch and the accelerator
pedal position sensor (1st channel) need to be adjusted.

Item
No.

Check items

Requirements

Normal condition

Inspection
procedure
No.

Refer-
ence
page

11

Oxygen sensor

Engine: After warm-
up

Idling

0 mV*

1

Code
No 11

13A-15

up

Sudden racing

600 – 1,000 mV

No.11

2,500 r/min

400 mV or less 

↔

600 – 1,000 mV
(alternates)

12

Air flow sensor

D

Engine coolant
temperature: 80
– 95

_

C

Idling

20 – 55 Hz

Code
No.12

13A-16

–  95

_

C

D

Lamps, electric
cooling fan and
all accessories:

2,500 r/min

65 – 85 Hz

all accessories:
OFF

D

Transmission:
Neutral (A/T: P
range)

Racing

Frequency in-
creases in re-
sponse to racing.

13

Intake air tem-
perature sen-
sor

Ignition switch: ON

Intake air tempera-
ture: –20

_

C

–20

_

C

Code
No.13

13A-17

sor

Intake air tempera-
ture: 0

_

C

0

_

C

Intake air tempera-
ture: 20

_

C

20

_

C

Intake air tempera-
ture: 40

_

C

40

_

C

Intake air tempera-
ture: 80

_

C

80

_

C

GDI – 

Troubleshooting

13A-72

Item
No.

Refer-
ence
page

Inspection
procedure
No.

Normal condition

Requirements

Check items

14

Throttle posi-
tion sensor
(2nd channel)

D

Engine coolant
temperature: 80
– 95

_

C

Release the accel-
erator pedal.

4,000 – 4,800 mV

Code
No.14

13A-18

(2nd channel)

–  95

_

C

D

Ignition switch:
ON (Engine
stopped)

Depress the accel-
erator pedal gradu-
ally.

Voltage decreases
in response to the
pedal depression.

Depress the accel-
erator pedal fully.

100 – 1,100 mV

16

Power supply
voltage

Ignition switch: ON

System voltage

Procedure
No.23

13A-62

18

Cranking sig-
nal (Ignition
switch – ST)

Transmission: Neu-
tral (A/T: P range)

Engine: Stopped

OFF

Procedure
No.25
<M/T>

13A-63
<M/T>
13A-64

s

tc

S )

Engine: Cranking

ON

/

Procedure
No.26
<A/T>

13A 64
<A/T>

21

Engine coolant
temperature
sensor

Ignition switch: ON

Engine coolant tem-
perature: –20

_

C

–20

_

C

Code
No.21

13A-19

sensor

Engine coolant tem-
perature: 0

_

C

0

_

C

Engine coolant tem-
perature: 20

_

C

20

_

C

Engine coolant tem-
perature: 40

_

C

40

_

C

Engine coolant tem-
perature: 80

_

C

80

_

C

22

Crank angle
sensor

D

Engine: crank-
ing

D

Tachometer:
Connected

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

II

.

Accord

Code
No.22

13A-20

D

Engine: Idling

D

Accelerator
pedal

position

Engine coolant tem-
perature: –20

_

C

1,200 – 1,400 r/min

pedal position
switch: ON

D

Transmission:
Neutral (A/T: P

Engine coolant tem-
perature: 0

_

C

1,100 – 1,300 r/min

Neutral  (A/T:  P
range)

Engine coolant tem-
perature: 20

_

C

1,000 – 1,200 r/min

Engine coolant tem-
perature: 50

_

C

750 – 950 r/min

Engine coolant tem-
perature: 80

_

C

550 – 850 r/min*

1

GDI – 

Troubleshooting

13A-73

Item
No.

Refer-
ence
page

Inspection
procedure
No.

Normal condition

Requirements

Check items

25

Barometric
pressure sen-

Ignition switch: ON

Altitude: 0 m

101 kPa

Code
No 25

13A-23

pressure sen-
sor

Altitude: 600 m

95 kPa

No.25

Altitude: 1,200 m

88 kPa

Altitude: 1,800 m

81 kPa

26

Accelerator
pedal position
switch

Ignition switch: ON
(Depress and re-
lease the accelera-

Release the accel-
erator pedal.

ON

Procedure
No.27

13A-65

switch

lease  the accelera-
tor pedal several
times)

Depress the accel-
erator pedal slightly.

OFF

27

Power steering
fluid pressure
switch

Engine: Idling

Steering wheel sta-
tionary

OFF

Procedure
No.31

13A-69

switch

Steering wheel
turning

ON

28

A/C switch

Engine: Idling (The
A/C compressor is

A/C switch: OFF

OFF

Procedure
No.32

13A-69

A/C  com ressor  is
running when the
A/C switch is on.)

A/C switch: ON

ON

No.32

29

Inhibitor switch
<A/T>

Ignition switch: ON

Selector lever: P or
N

P, N

Procedure
No.26

13A-64

Selector lever: D, 2,
L or R

D, 2, L, R

31

Small lamp
switch

Engine: Idling

Lighting switch:
OFF

OFF

Procedure
No.34

13A-70

Lighting switch: ON

ON

34

Air flow sensor
reset signal

Engine: After hav-
ing warmed up

Engine is idling

ON

Code
No 12

13A-16

reset signal

ing warmed up

3,000 r/min

OFF

No.12

37

Volumetric effi-
ciency

D

Engine coolant
temperature: 80
– 95

_

C

Engine is idling

30 – 50%

–

–

–  95

_

C

D

Lamps, electric
cooling fan and
all accessories:

2,500 r/min

30 – 50%

all accessories:
OFF

D

Transmission:
Neutral
(A/T: P range)

Engine is suddenly
raced

Volumetric effi-
ciency increases in
response to racing

38

Crank angle
sensor

D

Engine: Cranking [reading is possible
at 2,000 r/min or less]

D

Tachometer: Connected

Engine speeds dis-
played on the
MUT-

II

 and

tachometer are
identical.

–

–