engine MITSUBISHI MONTERO 2000 Service Repair Manual

GDI -Troubleshooting 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 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 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 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 13A-203
ACTUATOR TEST REFERENCE TABLE
Item
No.Inspection
itemDrive ContentsInspection contentsNormal condi-
tionInspec-
tion pro-
cedure
No.Reference
page
01InjectorCut fuel to the
No.1 injector.Engine:
Idling after warming-upIdling condition
becomes differ-Code
No. 4113A-147
02Cut fuel to the
No.2 injector.
(Cut the fuel supply to each
injector in turn and check
cylinders which does notent (becomes
unstable, or the
engine stalls).
03Cut fuel to the
No.3 injector.affect idling.)
04Cut fuel to the
No.4 injector.
05Cut fuel to the
No.5 injector.
06Cut fuel to the
No.6 injector.
07Fuel pump
(low-pres-
sure)Operates the
fuel pump (low-
pressure) to cir-
culate fuel.Ignition
switch:
ONPinch the return
hose with fin-
gers to feel the
pulse of the fuel
being circulated.Pulse is felt.Proce-
dure
No.2913A-193
Operating
sound can be
heard around
the fuel tank.Sound of opera-
tion can be
heard
08Purge con-
trol solenoid
valveSolenoid valve
turns from OFF
to ON.Ignition switch: ONSound of opera-
tion can be
heard when so-
lenoid valve is
driven.Proce-
dure
No.3613A-197
17Basic ignition
timingSolenoid valve
turns from OFF
to ON.DEngine: Idling
DSet a timing light.
5_BTDC--
21Condenser
fanDrive the fan
motorDIgnition switch: ON
DA/C switch: ON
Fan motor runsProce-
dure
No.2113A-187
34Electronic-
controlled
throttle valve
systemStop the throttle
control servoIgnition switch: ONThe throttle
valve opens
slightlyCode
No. 9113A-161


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GDI -Troubleshooting 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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GDI -Troubleshooting 13A-206
Terminal
No.Normal condition Check condition (Engine condition) Check item
49Engine control relayIgnition switch: OFF0-3V
Ignition switch: ONSystem voltage
51EGR valve (A)Ignition switch: OFF to ON5-8V
53EGR valve (C)
(Repeatedly changes
for approx. 3 seconds)
60EGR valve (B)
62EGR valve (C)
52Power steering fluid
pressure switchEngine: Idling after
warming-upWhen steering wheel is
stationarySystem voltage
When steering wheel is
turned0-3V
55Barometric pressureIgnition switch: ONAt an altitude of 0 m3.7 - 4.3 V
sensor
At an altitude of 1,200 m3.2 - 3.8 V
56Camshaft position sen-Engine: Cranking0.4 - 3.0 V
sor
Engine: Idling0.5 - 2.0 V
58Ignition switch-STEngine: Cranking8 V or more
61A/C switch 2Refer to GROUP 55 - Troubleshooting (Check at A/C-ECU or Engine-ECU
Terminal).
63Injector open circuit
check signalEngine: Increases from idling up to 4,000 r/minThe voltage decreases
slightly (approx. 0.7 V)
from 4.5 - 5.0 V.
64Intake air temperature
sensorIgnition switch: ONWhen intake air tempera-
ture is 0_C3.2 - 3.8 V
When intake air tempera-
ture is 20_C2.3 - 2.9 V
When intake air tempera-
ture is 40_C1.5 - 2.1 V
When intake air tempera-
ture is 80_C0.4 - 1.0 V
65Air flow sensorEngine: Idling2.2 - 3.2 V
Engine speed: 2,500 r/min
66Backup power supplyIgnition switch: OFFSystem voltage
71Oxygen sensorEngine: Running at 2,500 r/min after warming-up
(Check by using a digital voltmeter.)Voltages of 0 V and 0.8
V alternate


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GDI -Troubleshooting 13A-207
Terminal
No.Normal condition Check condition (Engine condition) Check item
78Throttle position sen-
sor (2nd channel)Ignition switch: ONRelease the accelerator
pedal.4.0 V or higher
Depress the accelerator
pedal fully.0.4 - 0.6 V
79Accelerator pedal posi-
tion switchIgnition switch: ONRelease the accelerator
pedal.0-1V
Depress the accelerator
pedal slightly.4 V or more
80Vehicle speed sensorDIgnition switch: ON
DMove the vehicle slowly forwardVoltages of 0 and 8 - 12
V alternate (changes
repeatedly)
83A/C switch 1Engine: IdlingA/C switch: OFF0-3V
A/C switch: ON (Com-
pressor is operating)System voltage
86Small lamp switchLighting switch: OFF0-3V
Lighting switch: Tail light positionSystem voltage
87Sensor applied voltageIgnition switch: ON4.5 - 5.5 V
93Fuel pressure sensorEngine: Idling0.3 - 4.7 V
95Accelerator pedal posi-
tion sensor (1st chan-Ignition switch: ONRelease the accelerator
pedal.0.985 - 1.085 V
nel)
Depress the accelerator
pedal fully.4.0 V or higher
98Ignition switch-IGIgnition switch: ONSystem voltage
123Stop lamp switchDepress the brake pedal.System voltage
Release the brake pedal.0-3V


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GDI -Troubleshooting 13A-208
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to OFF.
2. Disconnect the engine-A/T-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-A/T-ECU harness-side
connector while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-A/T-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.


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GDI -Fuel Pump (High Pressure)13A-241
"
CA
O-RING/FUEL PRESSURE HOSE INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pump (high pressure) or the delivery pipe
assembly.
2. While being careful not to damage the O-ring, turn the
fuel pressure hose to the left and right and connect it
to the delivery pipe assembly. After connecting, check
that the fuel injector turns smoothly.
3. If the fuel pressure hose does not turn smoothly, the cause
may be that the O-ring is getting caught. Remove the fuel
pressure hose, check the O-ring for damage and
re-connect the fuel pressure hose to the delivery pipe
assembly and then re-check.


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