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.
–
–
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