sensor MITSUBISHI MONTERO 2000 Service Repair Manual

GDI -Troubleshooting <A/T>13A-184
Inspection procedure 15
The feeling of impact or vibration when decelerating
Probable cause
The cause is probably insufficient intake air due to a faulty electronic-controlled
throttle valve system.DMalfunction of the electronic - controlled throttle
valve system
OK
Clean around the throttle valve. (Refer to P.13A-220.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch
(Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system (Refer to
P.13A-192, Inspection procedure 28.)
NO
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system
(Refer to P.13A-162, code No.92.)
MUT-
IISelf-Diag Code
Are diagnosis codes displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
Inspection procedure 16
Knocking
Probable cause
In case as the above, the cause is probably that the heat value of the spark
plug is inappropriate.DMalfunction of the detonation sensor
DImproper heat range of the spark plugs.
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
NO
Does knocking occur when the vehicle is driven with the
detonation sensor disconnected?
(At this time, use the MUT-IIto check whether the ignition
timing is retarded fromwhen the detonation sensor connector
is connected.)NOCheck the detonation sensor system. (Refer to P.13A-146,
code No.31.)
YES
Check the following items in that order.
DSpark plugs
DCheck if foreign materials (water, kerosine,etc.) got into
fuel.
Inspection procedure 17
Run-on (Dieseling)
Probable cause
Fuel leakage from injectors is suspected.DMalfunction of the injector
Replace the injector.


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GDI -Troubleshooting <A/T>13A-185
Inspection procedure 18
Too high CO and HC concentration when idling
Probable cause
Abnormal air-fuel ratio is suspected.DMalfunction of the air/fuel ratio control system
DDeteriorated catalyst
OK
To the nextpage
NG
Replace the ignition coil.
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine iscranked.NG
NG
Measure fuel high -pressure between the fuelpump (high
pressure) and injector. (Refer to P.13A-223.)
Check the trouble symptoms.
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
Repeat 0 - 400 mV and 600 - 1,000 mV alternately
during idling(wait for at least 2 minutes after the
enginestarted to run at idle).OKReplace the oxygen sensor.
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
600 - 1,000 mV when theengine is suddenlyracedNGCheck the oxygen sensor system. (Refer to P.13A-131, code
No.11.)
OK
MUT-
IIActuator Test
08 Purge control solenoid valve
(Refer to P.13A-203.)NGCheck the purge control solenoid valve system
(Refer to P.13A-197, Inspection procedure 36.)
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection
procedure 35.)
OK
MUT-
IIData list
25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system (Refer to
P.13A-145, code No.25.)
OK
MUT-
IIData list
13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system (Refer to
P.13A-135, code No.13.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer
to P.13A-138, code No.21.)
NO
Check the ignition timing. (Refer to GROUP 11A - Engine
Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are
properly installed.
MUT-
IISelf-Diag Code
Are diagnosis codes displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.


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GDI -Troubleshooting <A/T>13A-190
Inspection procedure 25
Engine control relay, ignition switch-IG system
Probable cause
When an ignition switch ON signal is input to the engine-A/T-ECU, the
engine-A/T-ECU turns the control relay ON.
This causes system voltage to be supplied to the engine-A/T-ECU, sensors, and
actuators.DMalfunction of the ignition switch
DMalfunction of the control relay.
DOpen circuit or short-circuited harness wire in the
engine controlrelay circuit.
DMalfunction of the engine-A/T-ECU
Check the harness wire between the
battery and theengine controlrelay,
and repair if necessary.
Check the engine-A/T-ECU power
supply and earth circuit. (Refer to
P.13A-189, Inspection procedure 24.)OK
OK
Measure at control relay connector
B-25X.
DDisconnect the connector, and
measure at the harness side.
DThe voltage between 2, 3 and
earth
OK:
System voltageNG
Check the control relay.
(Refer to P.13A-227.)NG
Replace
Inspection procedure 26
Injector driver relay system
Probable cause
When an ignition switch ON signal is input to the engine-A/T-ECU, the
engine-A/T-ECU turns the injector driver relay ON.
This causes system voltage to be supplied to the injector driver.DMalfunction of the injector driver relay.
DOpen or short circuit, or loose connector contact
DMalfunction of the engine-A/T-ECU
OK
Check the trouble symptoms.
OK
Check the trouble symptoms.
OK
Check the trouble symptoms.
Check the injector driver relay (Refer to P.13A-227.)NG
Replace
OK
(1) NG
Check the harness wire between the injector driver relay and
the battery, and repair if necessary.
(2)NG
Check the following connectors:
D-208, D-223 <LHD>, E-13
OK
Check the trouble symptoms.
NG
Check the harness wire between the injector driver relay and
the ignition switch, and repair if necessary.
OK
Measure at engine-A/T-ECU connector D-119.
DDisconnect the connector, and measure at the harness
side.
DThe voltage between terminal 6 and earth (Ignition switch:
ON)
OK:
System voltageNGCheck the following connector:
B-28X
NG
Check the harness wire between the injector driver relay and
the engine-A/T-ECU, and repair if necessary.
OK
Check the following connector:
D-119
NG
Measure at injector driver connector B-121.
DConnect the connector.
DThe voltage between terminal 4, 12, 21 and earth
(Ignition switch: ON)
OK:
System voltageNGCheck the following connector:
B-28X
OK
Check the injector driver system.
(Refer to P.13A-196, Inspection procedure 34.)
NG
Check the harness wire between the injector driver relay and
the injector driver, and repair if necessary.NG
Repair
NG
Repair
NG
Repair NG
Repair
Measure at the injector driver relay connector B-28X.
DDisconnect the connector, and measure at the harness
side.
(1) The voltage between terminal 3 and earth
OK:
System voltage
(2) The voltage between terminal 4 and earth (Ignition switch:
ON)
OK:
System voltage


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GDI -Troubleshooting <A/T>13A-192
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-A/T-ECU. The engine-A/T-ECU uses
this signal to carry outidlespeed control.DMaladjustment of the accelerator pedal position
switch and the acceleratorpedal positionsensor.
DOpen circuit or short-circuited harness wire in the
accelerator pedal positionswitch system, or poor
connector contact
DMalfunction of the engine-A/T-ECU
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
Check the acceleratorpedal position
switch. (Refer to P.13A-230.)NGReplace the accelerator pedal
position sensor.
OK
Measure at accelerator pedal position
sensor connector D-135.
DDisconnect the connector, and
measure at the harness side.
DThe voltage between terminal 4
and earth
(Ignition switch: ON)
OK:
4 V or more
DThe continuity between terminal 5
and earth
OK:
ContinuityNGCheck the following connector:
D-121NG
Repair
OK
Check the trouble symptoms.
NG
NG
Check the harness wire between the
engine-A/T-ECU and the accelerator
pedal positionsensor.Repair
OK
Check the following connector:
D-135NG
Repair


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GDI -Troubleshooting <A/T>13A-198
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: Injector running time indicates the time where the power voltage is 11 V and the cranking speed
is 250 r/min or less. As the engine speed increases and the time passes by, the injector running
time decreases.
*2: There may be occasions of taking the injector running time approximately 10% longer than usual
when a vehicle has not been driven for a long time (mileage is no more than 500 km.)
*3: It is normal that the idle switch turns from ON to OFF when accelerator pedal position sensor (1st
channel) voltage increases by 200 - 600 mV from the idling position. Moreover, adjust the idle switch
and accelerator pedal position sesor if the idle switch keeps turning after the accelerator pedal is
depressed.
Item
No.Inspection
itemInspection contentsNormal conditionInspection
procedure
No.Reference
page
11Oxygen
sensorEngine: After having
warmed up
(Air/fuel mixture is
made leaner whenWhen at 4,000 r/min,
engine is deceler-
ated200 mV or lessCode No.
1113A-131
made leaner when
decelerating, and is
made richer when
racing.)
Race the engine sud-
denly.600 - 1,000 mV
Engine: After having
warmed up
(The oxygen sensor
signal is used to
check the air/fuelIdling
(after six minutes)400 mV or less
600 - 1,000 mV
(changes)
check the air/fuel
mixture ratio, and
control condition by
the engine-
A/T-ECU.)
2,500 r/min
12Air flow sen-DEngine coolantIdling22 - 48 HzCode No.13A-133
sortemperature: 80 -
95
_C
Lamps and all
2,500 r/min60 - 100 Hz
12
DLamps and all
accessories: OFF
DTransmission: P
range
RacingFrequency in-
creases in re-
sponse to racing
13Intake air
temperatureIgnition switch: ON or
with engine runningWhen intake air tem-
perature is - 20_
C-20_
CCode No.
1313A-135
sensor
When intake air tem-
perature is 0_
C0_
C
When intake air is
20_
C20_
C
When intake air is
40_
C40_
C


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GDI -Troubleshooting <A/T>13A-199
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
14Throttle
positionDEngine: After hav-
ing warmed upRelease the acceler-
ator pedal.4,000 mV or moreCode No.
1413A-137
sensor (2nd
channel)DIgnition switch: ON
(Engine: Stopped)
Depress the acceler-
ator pedal gradually.Voltage
decreases in
response to the
pedal depression.
Depress the acceler-
ator pedal fully.400 - 600 mV
16System
voltageIgnition switch: ONSystem voltageProcedure
No. 2513A-190
18Cranking
signal (igni-Ignition switch: ONEngine: StoppedOFFProcedure
No.2713A-191
signal (igni-
tion switch:
ST)
Engine: CrankingON
No.27
21Engine cool-
ant temper-
ature sensorIgnition switch: ON or
with engine runningWhen engine coolant
temperature is
-20_
C-20_
CCode No.
2113A-138
When engine coolant
temperature is 0_
C0_
C
When engine coolant
temperature is 20_
C20_
C
When engine coolant
temperature is 40_
C40_
C
22Crank angle
sensorDEngine: Cranking
DTachometer: Con-
nectedCompare the
tachometer with the
MUT-IIreading.IdenticalCode No.
2213A-140
DEngine: Idling
DIdle position
switch: ON
DWithin six minutesWhen engine coolant
temperature is
-20_
C1,250 - 1,450
r/min
DWithin six minutes
after engine
starting (Onlywhen
engine coolant
When engine coolant
temperature is 0_
C1,100 - 1,300
r/min
engine coolant
temperature is
80
_C)
When engine coolant
temperature is 20_
C1,000 - 1,200
r/min
When engine coolant
temperature is 40_
C900 - 1,100 r/min
When engine coolant
temperature is 80_
C550 - 650 r/min


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GDI -Troubleshooting <A/T>13A-200
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
25BarometricIgnition switch: ONAt altitude of 0 m101 kPaCode No.13A-145
pressure
sensor
At altitude of 600 m95 kPa
25
At altitude of 1,200 m88 kPa
At altitude of 1,800 m81 kPa
26Accelerator
pedal posi-Ignition switch: ON
(Depress and re-Release the acceler-
ator pedal.ONProcedure
No.2813A-192
tion switchlease the accelerator
pedal several times)
Depress the acceler-
ator pedal slightly.OFF
27Power
steering
fluid pres-
sure switchEngine: IdlingWhen steering wheel
is turnedONProcedure
No.3013A-194
28A/C switchEngine: Idling
(The A/C compres-A/C switch: OFFOFFProcedure
No.3113A-194
(The A/C compres-
sor is running when
the A/C switch is on.)
A/C switch: ONON
No.31
31Small lampEngine: IdlingLighting switch: OFFOFFProcedure13A-195
switch
Lighting switch: ONON
No.33
34Air flow sen-Engine: After havingIdlingONCode No.13A-133
sor reset
signalwarmed up
3,000 r/minOFF
12
37VolumetricDEngine coolantIdling20 - 40%--
efficiencytemperature: 85 -
95
_C
Lamps and all
2,500 r/min10 - 30%DLamps and all
accessories: OFF
DTransmission: P
range
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
displayed on the
MUT-IIand
tachometer are
identical.--


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GDI -Troubleshooting <A/T>13A-201
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
41Injector
drive time*1D
Engine: CrankingWhen engine coolant
temperature is 0_
C120 - 160 msCode No.
4113A-147
When engine coolant
temperature is 20_
C70 - 90 ms
When engine coolant
temperature is 80_
C20 - 35 ms
Injector
drive time*2D
Engine coolant
temperature: 85 -
95_
CIdling0.3 - 0.8 ms
95_
C
D
Lamps and all
accessories: OFF
D
Transmission:
2,500 r/min0.4 - 1.0 ms
D
Transmission:
P range
D
Within six minutes
after engine start-
ing
When engine is sud-
denly racedIncreases
44Ignition ad-
vance valueD
Engine: After hav-
ing warmed up
D
Timing lamp is set.
(The timing lamp is
set in order toIdling12 - 28_
BTDCCode No.
4413A-148
set in order to
check actual igni-
tion timing.)
D
Within six minutes
after engine start-
ing
2,500 r/min15 - 35_
BTDC
49A/C relayEngine: After having
warmed up, idlingA/C switch: OFFOFF (compressor
clutch is not oper-
ating)Procedure
No.3113A-194
A/C switch: ONON (compressor
clutch is operat-
ing)
67Stop lamp
switchIgnition switch: ONBrake pedal: De-
pressedOFFProcedure
No.3213A-195
Brake pedal: Re-
leasedON
68EGR valveD
Engine coolant
temperature: 85 -
95_
CIdling2 - 20 STEPProcedure
No.3513A-196
D
Lamps and all
accessories: OFF
D
Transmission: P
range
2,500 r/min0 - 10 STEP
74Fuel pres-
sure sensorD
Engine coolant
temperature: 85 -
95_
CEngine: Cranking2 MPa or moreCode No.
5613A-151
D
Lamps and all
accessories: OFF
D
Transmission: P
range
Engine: Idling4.0 - 6.9 MPa


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GDI -Troubleshooting <A/T>13A-202
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Inspection
item
77Accelerator
pedal posi-Ignition switch: ONRelease the acceler-
ator pedal.985 - 1,085 mVCode No.
7713A-154
tion sensor
(2nd chan-
nel)
Depress the acceler-
ator pedal gradually.Increases in re-
sponse to the
pedal depression
stroke.
Depress the acceler-
ator pedal fully.4,000 mV or more
78Accelerator
pedal posi-Ignition switch: ONRelease the acceler-
ator pedal.985 - 1085 mVCode No.
7813A-156
tion sensor
(1st chan-
nel)
Depress the acceler-
ator pedal gradually.Increases in re-
sponse to the
pedal depression
stroke.
Depress the acceler-
ator pedal fully.4,000 mV or more
79Throttle
positionDEngine: After hav-
ing warmed upRelease the acceler-
ator pedal.400 - 800 mVCode No.
7913A-158
sensor (1st
channel)DIgnition switch: ON
(Engine stopped)
Depress the acceler-
ator pedal gradually.Increases in re-
sponse to the
pedal depression
stroke.
Depress the acceler-
ator pedal fully.4,200 - 4,800 mV
Engine: Idling afterNo load450 - 1,000 mV
warming-up
A/C switch: OFF to
ONIncreases by 100
- 600 mV
Transmission: P to D
rangeIncreases by 0 -
200 mV.
99Combustion
modeEngine: After having
warmed upIdling
(several minutes af-
ter starting)Compression
lean--
2,500 r/minStoichiometric
feedback
Race the engine sud-
denly while the en-
gine is idling.Open loop


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GDI -Troubleshooting <A/T>13A-205
Terminal
No.Normal condition Check condition (Engine condition) Check item
18Condenser fan relayCondenser fan not operatingSystem voltage
Condenser fan operating0 - 3 V or more
19Air flow sensor resetEngine: Idling0-1V
signal
Engine speed: 3,000 r/min6-9V
20A/C relayDEngine: Idling
DA/C switch: OFF to ON (Compressor operating)System voltage or
changes momentarily 6
V or more to 0 - 3 V
21Fuel pump relayIgnition switch: ONSystem voltage
Engine: Idling0-3V
22Engine warning lampIgnition switch: OFF to ONSystem voltage
23GDI ECO indication
lampIgnition switch: OFF to ON0 - 3 V (system voltage
after five seconds)
Rev the engine suddenly.System voltage
34Purge control solenoidDEngine coolantEngine: stoppedSystem voltage
valvetemperature: 80 -
95_C
DIgnition switch:
ON
Engine: After starting, in-
crease the engine speed
up to 3,500 r/minThe voltage drops
41Power supplyIgnition switch: ONSystem voltage
47
43Engine ignition signalEngine speed: 3,000 r/min0.3 - 3.0 V
44Engine coolant tem-
perature sensorIgnition switch: ONWhen engine coolant tem-
perature is 0_C3.2 - 3.8 V
When engine coolant tem-
perature is 20_C2.3 - 2.9 V
When engine coolant tem-
perature is 40_C1.3 - 1.9 V
When engine coolant tem-
perature is 80_C0.3 - 0.9 V
45Crank angle sensorEngine: Cranking0.4 - 4.0 V
Engine: Idling1.5 - 2.5 V
46Power supply voltage
applied to accelerator
pedal position sensor
(1st channel)Ignition switch: ON4.5 - 5.5 V


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