2000 MITSUBISHI MONTERO sensor

GDI -Troubleshooting 13A-99
Inspection procedure 26
Engine control relay and ignition switch-IG system
Probable cause
When the ignition switch ON signal is input to the engine-ECU, the engine-ECU
turns on theengine controlrelay.
This causes system voltage to be supplied to the engine-ECU and to the
sensors and actuators.DMalfunction of the ignition switch
DMalfunction of the engine controlrelay
DOpen circuit or short-circuited harness wire of the
engine controlrelay circuit
DMalfunction of the engine-ECU
OK
Check the trouble symptoms.NGCheck the harness wire between the
battery and theengine controlrelay, and
repair if necessary.
OK
Check the engine-ECU power supply
and earth circuit system. (Refer to
P.13A-98, Inspection procedure 25.)
OK
Measure at the engine controlrelay con-
nector B-25X.
DDisconnect the connector, and
measure at the harness side.
DVoltage between 2, 3 and earth
OK:
System voltageNGCheck the following connector:
D-143NG
Repair
Check theengine controlrelay. (Refer
to P.13A-227.)NG
Replace
Inspection procedure 27
Ignition switch-ST system
Probable cause
The ignition switch-ST outputs a HIGH signal to the engine-ECU while the
engine iscranking.
The engine-ECU uses this signal to carry out functions such as fuel injection
control during starting.DMalfunction of the ignition switch
DOpen circuit or short-circuited harness wire of the
ignition switch circuit
DMalfunction of the engine-ECU
NG
RepairOK
Check the ignition switch. (Refer to
GROUP 54.)
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
Check the following connector:
D-117NG
RepairOK
Check the trouble symptoms.NGCheck the harness wire between the
engine-ECU and the ignition switch.
Measure at the engine-ECU connector
D-117.
DDisconnect the connector, and
measure at the harness side.
DVoltage between 68 and earth
(Ignition switch: START)
OK:
8 V or moreNGCheck the following connectors:
C-01, E-113, E-114NG
Repair


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GDI -Troubleshooting 13A-100
Inspection procedure 28
Accelerator pedal position switch system
Probable cause
The accelerator pedal positionswitch detects that the acceleratorpedal isfully closed,
and sends a signal to the engine-ECU. The engine-ECU controlsidle speed,based
on this signal.DMaladjustment of the accelerator cable
DMaladjustment of the accelerator pedal positionswitch
DOpen circuit or short-circuited harness wire in the
accelerator pedal positionswitch system, or poor
connector contact
DMalfunction of the engine-ECU
NG
Repair
NG
Repair
Check the acceleratorpedal positionswitch. (Refer to P.13A-230.)NGReplace the accelerator pedal positionsensor assembly.
OK
Measure at accelerator pedal positionsensor connector D-135.
DDisconnect the connector, and measure at the harness side.
DVoltage between terminal 4 and earth
(Ignition switch: ON)
OK:
4 V or more
DContinuity between terminal 5 and earth
OK:
ContinuityNGCheck the following connector:
D-118
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and accelerator
pedal positionsensor.
OK
Check the following connector:
D-135NG
Repair
OK
Check trouble symptom.NGReplace the engine-ECU.
OK


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GDI -Troubleshooting 13A-105
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 200 - 600 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 itemsRequirementsNormal conditionInspection
procedure
No.Reference
page
11Oxygen sen-Engine: AfterIdling200 mV or lessK
1Code No.13A-28
sor
(front)warm-up
Sudden racing600 - 1,000 mV
P0130
2,500 r/min400 mV or less and
600 - 1,000 mV
alternates.
12Air flow sensorD
Engine coolant
temperature:Idling22 - 48 HzCode No.
P010013A-17
80 - 95_
C
D
Lamps, electric
cooling fan and2,500 r/min60 - 100 Hz
cooling fan and
all accessories:
OFF
D
Transmission:
Neutral
RacingFrequency in-
creases in re-
sponse to racing.
13Intake air tem-
perature sen-Ignition switch: ONIntake air tempera-
ture: - 20_
C-20_
CCode No.
P011013A-21
sor
Intake air tempera-
ture: 0_
C0_
C
Intake air tempera-
ture: 20_
C20_
C
Intake air tempera-
ture: 40_
C40_
C
Intake air tempera-
ture: 80_
C80_
C


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GDI -Troubleshooting 13A-106
Item
No.Reference
page Inspection
procedure
No. Normal condition Requirements Check items
14Throttle posi-
tion sensorDEngine coolant
temperature:Release the accel-
erator pedal.4,000 mV or moreCode No.
P022513A-52
(2nd channel)80 - 95_C
DIgnition 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.400 - 600 mV
16Power supply
voltageIgnition switch: ONSystem voltageProcedure
No.2513A-98
18Cranking sig-Transmission: Neu-Engine: StoppedOFFProcedure13A-99
nal (Ignition
switch - ST)tral
Engine: CrankingON
No.27
21Engine coolant
temperature
sensorIgnition switch: ONEngine coolant
temperature:
-20_C-20_CCode No.
P011513A-22
Engine coolant
temperature: 0_C0_C
Engine coolant
temperature: 20_C20_C
Engine coolant
temperature: 40_C40_C
Engine coolant
temperature: 80_C80_C
22Crank angle
sensorDEngine: crank-
ing
DTachometer:
ConnectedCompare the engine
speed readings on
the tachometer and
the MUT-II.AccordCode No.
P033513A-56
DEngine: Idling
DAccelerator
pedal positionEngine coolant
temperature:
-20_C1,250 - 1,450 r/min
switch: ON
Engine coolant
temperature: 0_C1,100 - 1,300 r/min
Engine coolant
temperature: 20_C1,000 - 1,200 r/min
Engine coolant
temperature: 40_C900 - 1,100 r/min
Engine coolant
temperature: 80_C550 - 650 r/min*1


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GDI -Troubleshooting 13A-107
Item
No.Reference
page Inspection
procedure
No. Normal condition Requirements Check items
25BarometricIgnition switch: ONAltitude: 0 m101 kPaCode No.13A-19
pressure sen-
sor
Altitude: 600 m95 kPa
P0105
Altitude: 1,200 m88 kPa
Altitude: 1,800 m81 kPa
26Accelerator
pedal positionIgnition switch: ON
(Depress and re-Release the accel-
erator pedal.ONProcedure
No.2813A-100
switchlease the accelera-
tor pedal several
times)
Depress the accel-
erator pedal slight-
ly.OFF
27Power steer-
ing fluid pres-Engine: IdlingSteering wheel sta-
tionaryOFFProcedure
No.3013A-102
sure switch
Steering wheel
turningON
28A/C switchEngine: Idling (The
A/C compressor isA/C switch: OFFOFFProcedure
No.3113A-100
A/C compressor is
running when the
A/C switch is on.)
A/C switch: ONON
No.31
31Small lamp
switchEngine: IdlingLighting switch:
OFFOFFProcedure
No.3313A-104
Lighting switch: ONON
34Air flow sensorEngine: After hav-Engine is idlingONCode No.13A-17
reset signaling warmed up
3,000 r/minOFF
P0100
37Volumetric effi-
ciencyDEngine coolant
temperature:Engine is idling20 - 40%--
80 - 95_C
DLamps, electric
cooling fan and2,500 r/min10 - 30%
cooling fan and
all accessories:
OFF
DTransmission:
Neutral
Engine is suddenly
racedVolumetric effi-
ciency increases in
response to racing
38Crank angle
sensorDEngine: Cranking [reading is possible
at 2,000 r/min or less]
DTachometer: ConnectedEngine speeds dis-
played on the
MUT-IIand
tachometer are
identical.--


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GDI -Troubleshooting 13A-108
Item
No.Reference
page Inspection
procedure
No. Normal condition Requirements Check items
41Injector drive
time *2DEngine coolant
temperature:
80 - 95_CIdling0.3 - 0.8 ms*1--
80 - 95_C
DLamps, electric
cooling fan and
all accessories:
2,500 r/min0.4 - 1.0 ms
all accessories:
OFF
DTransmission:
Neutral
Sudden racingIncreases
44Ignition
advanceDEngine: After
warm-upIdling5-20_BTDC *1Code No.
P030013A-53
advancewarm-up
DSet a timing
light.
2,500 r/min15 - 35_BTDC
P0300
49A/C relayEngine: After
warm-up, idlingA/C switch: OFFOFF (compressor
clutch is not oper-
ating)Procedure
No.3113A-102
A/C switch: ONON (compressor
clutch is operating)
59Oxygen sen-
sor (rear)DTransmission:
2nd gear
DDrive with
throttle widely
open3,500 r/min600 - 1,000 mVCode No.
P013613A-31
67Stop lamp
switchIgnition switch: ONBrake pedal: De-
pressedOFFProcedure
No.3213A-103
Brake pedal: Re-
leasedON
68EGR valveDEngine coolant
temperature:
80 - 95_C
DLamps, electricIdling2 - 20 STEPCode No.
P040313A-60
cooling fan and
all accessories:
OFF
DTransmission:
Neutral
2,500 r/min0 - 10 STEP
74Fuel pressure
sensorDEngine coolant
temperature:
80 - 95_C
DLamps, electric
cooling fan and
all accessories:
OFF
DTransmission:
NeutralEngine: Idling4 - 6.9 MPaCode No.
P019013A-36


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GDI -Troubleshooting 13A-109
Item
No.Reference
page Inspection
procedure
No. Normal condition Requirements Check items
77Accelerator
pedal positionIgnition switch: ONRelease the accel-
erator pedal.985 - 1085 mVCode
No.P122513A-68
sensor (2nd
channel)
Depress the accel-
erator pedal gradu-
ally.Increases in re-
sponse to the ped-
al depression
stroke.
Depress the accel-
erator pedal fully.4,000 mV or more
78Accelerator
pedal positionIgnition switch: ONRelease the accel-
erator pedal.985 - 1085 mVCode
No.P022013A-50
sensor (1st
channel) *3Depress the accel-
erator pedal gradu-
ally.Increases in re-
sponse to pedal
depression stroke.
Depress the accel-
erator pedal fully.4,200 - 4,800 mV
79Throttle posi-
tion sensorDEngine coolant
temperature:Release the accel-
erator pedal.400 - 800 mVCode
No.012013A-25
(1st channel)80 - 95_C
DIgnition switch:
ON (Engine
stopped)
Depress the accel-
erator pedal gradu-
ally.Increases in re-
sponse to pedal
depression stroke.
4,600 - 5,200 mV4,200 - 4,800 mV
Engine: AfterNo load450 - 1,000 mV
warm-up, idling
A/C switch: OFF®
ONIncreases by 100 -
600 mV.
99Fuel injection
modeEngine: After warm
upIdling (after four
minutes or more
have passed since
engine start)Lean compression--
2,500 r/minStoichiometric
metric feedback
Sudden racing after
idle positionOpen loop


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GDI -Troubleshooting 13A-112
Terminal
No.Normal condition Check requirements (engine condition) Check item
16Purge control solenoid valveDEngine cool-Engine: stoppedSystem voltage
ant tempera-
ture:
80 - 95_C
DIgnition
switch: ON
Engine: Start the
engine, and then
increase engine
speed up to 3,500
r/min.Voltage decreases.
18Condenser fan relayCondenser fan is not operating.System voltage
Condenser fan is operating.0-3V
20Fuel pump relayIgnition switch:Engine: stoppedSystem voltage
ON
Engine: idling0-3V
21A/C relayDEngine: idlingSystem voltage, or changes
DA/C switch: OFF®ON
(Compressor is operating)from momentarily 6 V or
more to 0®3V
31Engine warning lampIgnition switch: OFF®ON0-3V®System voltage
(after several seconds)
41Sensor power supplyIgnition switch: ON4.5 - 5.5 V
42Power supply to accelerator
pedal position sensor (1st
channel)Ignition switch: ON4.5 - 5.5 V
43Crank angle sensorEngine: Cranking0.4 - 4.0 V
Engine: Idling1.5 - 2.5 V
44Engine coolant temperature
sensorIgnition switch:
ONEngine coolant
temperature: 0_C3.2 - 3.5 V
Engine coolant
temperature:
20_C2.3 - 2.9 V
Engine coolant
temperature:
40_C1.5 - 2.1 V
Engine coolant
temperature:
80_C0.4 - 1.0 V
45Engine ignition signalEngine: 3,000 r/min0.3 - 3.0 V


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