2000 MITSUBISHI MONTERO egr valve

DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-38
INSPECTION PROCEDURE 22
EGR control solenoid valve No. 1 circuit inspection
NG
Check the harness between the
engine-ECU and the EGR control
solenoid valve No. 1 connector, and
repair if necessary.
OK
Check the trouble symptoms.
OK
Measure at EGR control solenoid
valve No. 1 connector B-35.
DDisconnect the connector and
measure at the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
OK:System voltage
NG
Check the following connector:
B-35NG
Repair NG
Check the harness between the
control relay and the EGR control
solenoid valve No. 1 connector, and
repair if necessary.
EGR control solenoid valve No. 1
check (Refer to GROUP 17 -
Service Adjustment Procedures.)NG
Replace
OK
Measure at engine-ECU connector
D-110.
DDisconnect the connector and
measure at the harness side.
DVoltage between 9 and the earth
(Ignition switch: ON)
OK:System voltage
NG
Replace the engine-ECU. NGCheck the trouble symptoms.OK
Repair
Check the following connector:
D-110OK
INSPECTION PROCEDURE 23
EGR control solenoid valve No. 2 circuit inspection
NG
Check the harness between the
engine-ECU and the EGR control
solenoid valve No. 2 connector, and
repair if necessary.
OK
Check the trouble symptoms.
OK
Measure at EGR control solenoid
valve No. 2 connector B-34.
DDisconnect the connector and
measure at the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
OK:System voltage
NG
Check the following connector:
B-34NG
Repair NG
Check the harness between the
control relay and the EGR control
solenoid valve No. 2 connector, and
repair if necessary.
EGR control solenoid valve No. 2
check (Refer to GROUP 17 -
Service Adjustment Procedures.)NG
Replace
OK
Measure at engine-ECU connector
D-110.
DDisconnect the connector and
measure at the harness side.
DVoltage between 5 and the earth
(Ignition switch: ON)
OK:System voltage
NG
Replace the engine-ECU. NGCheck the trouble symptoms.OK
Repair
Check the following connector:
D-110OK


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-41
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
06Vehicle
speed
sensorWhen drivingCompare the engine
speed displayed in the
speed meter with that
in MUT-IIMatchedCode No.
1713E-13
07Pump
speedEngine: CrankingCompare the engine
speed displayed in theMatchedCode No.
1813E-14
speed
sensorEngine: Idling
speeddisplayedinthe
tachometer with that in
MUT-II
18
08Crank angle
sensorEngine: CrankingCompare the engine
speed displayed in theMatchedCode No.
2113E-15
sensor
Engine: Idling
speeddisplayedinthe
tachometer with that in
MUT-II
21
09Accelerator
pedal posi-
tionsensor
Ignition switch: ONAccelerator pedal:
Idling position1,015 - 1,055
mVCode No.
1113E-9
tion sensor
(main)Accelerator pedal:
Fully opened position4,035 - 4,500
mV or higher
10Accelerator
pedal posi-
ti
Ignition switch: ONAccelerator pedal:
Idling position0%Code No.
1113E-9
pp
tion sensor
(main)Accelerator pedal:
Fully opened position99 - 100 %
11System volt-
ageIgnition switch: ONSystem volt-
ageProcedure
No. 2013E-37
13Timing
tl
Engine: After warming
thi
Idling70 - 90 %Code No.
25N
13E-17g
control
valve*1
gg
up the engineWhen engine is
suddenly racedChanges25 or No.
4313E-21
14EGR com-
dl
Engine: After warming
thi
Idling0 - 100 %*2–-
mand value
gg
up the engineWhen engine is
suddenly racedMomentarily
decreases
17Control
sleeve posi-Engine: After warming
up the engineIdling2.1 - 2.5 VCode No.
2613E-18
sleeveposi
tion (target
value)
uptheengine
2,500 r/min (no load)1.8 - 2.2 V
26
18Actual injec-
titi i
Engine: After warming
thi
Idling0.7 - 1.2 V––j
tion timing
gg
up the engineWhen engine is
suddenly racedIncreases
19Injection
ti i
Engine: After warming
thi
Idling0.7 - 1.2 V––j
timing com-
mand value
gg
up the engineWhen engine is
suddenly racedIncreases
21GE actuatorEngine: After warming
uptheengine
Idling0%Code No.
26orNo
13E-18
13E 23upthe engine2,500 r/min18 - 38 %26orNo.
4813E-23
23Control
sleeve posi-Engine: After warming
up the engineIdling2.1 - 2.5 VCode No.
2613E-18
sleeveposi
tion (actual
l)
uptheengine
2,500 r/min (no load)1.8 - 2.2 V
26
(
value)2,500r/min(noload)1.82.2V
24Accelerator
pedal posi-
ti
Ignition switch: ONAccelerator pedal:
Idling position1,015 - 1,055
mVCode No.
2713E-19
pp
tion sensor
(sub)Accelerator pedal:
Fully opened position4,035 - 4,500
mV or higher


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-42
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
25Accelerator
pedal
position
Ignition switch: ONAccelerator pedal:
Idling position0%Code No.
2713E-19
position
sensor (sub)Accelerator pedal:
Fully opened position99 - 100 %
31EGR valve
position
Engine: After warming
uptheengine
Idling under no load2.3 - 3.3 VCode No.
51
13E-25
position
sensor (tar-
get value)upthe engine
Engine is suddenly
racedMomentarily
decreases
(0.3 - 0.7 V)
51
32EGR valve
position
Engine: After warming
uptheengine
Idling under no load2.3 - 3.3 VCode No.
51
13E-25
position
sensor (ac-
tual value)upthe engine
Engine is suddenly
racedMomentarily
decreases
(0.3 - 0.7 V)
51
33Variable
geometry
Engine: After warming
uptheengine
Idling53 - 59 kPaCode No.
52
13E-26
geometry
control pres-
sure sensorupthe engine
Engine is suddenly
racedMomentarily
increases
52
NOTE
*1: The opening degree of the timing control valve is converted into percentage. (0 %: timer non-advanced angle,
100 %: timer maximum advanced angle)
*
2: The opening degree of the EGR solenoid valve is converted into percentage.
Item
No.
Check itemInspection conditionsValue to be
determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
41Idle switchIgnition switch: ON
(check by repeated
acceleratoroperation)
Release the foot from
the accelerator pedal.ONCode No.
2313E-16
y
accelerator operation)Step on the accelerator
pedal slightly.OFF
43A/C switchEngine: Idling (The
A/C compressor
shouldbeinoperation
A/C switch: ONONProcedure
No. 2513E-39
shouldbein operation
when the A/C switch is
“ON”)A/C switch: OFFOFF
44Ignition
ihST
Ignition switch: ONEngine: StopOFF––g
switch-ST
g
Engine: CrankingON
45Ignition
switch-IGIgnition switch: ONON––
46Control
relayIgnition switch: ONON––
47A/C relayEngine: Idling after
warming up the engineA/C switch: OFFOFF (A/C
compressor
clutch not in
operation)Procedure
No. 2513E-39
A/C switch: ONON (A/C
compressor
clutch in
operation)


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-43
Item
No.Check itemInspection conditionsValue to be
determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
50Condenser
fan relayIgnition switch: ONA/C switch: OFF
(engine coolant
temperature at 102_C
or higher)
A/C switch: ON
(engine coolant
temperature at 102_C
or higher, or outside
temperature at 15_C
or higher)ONProcedure
No. 1913E-36
Condenser
fan relayIgnition switch: ONA/C switch: OFF
(engine coolant
temperature at 95_C
or lower)
A/C switch: ON
(engine coolant
temperature at 95_Cor
lower, or outside
temperature at 15_C
or lower)OFF
52Glow plug
relayDIgnition switch:
ONRelay not drivenOFFProcedure
No. 2413E-39
relayON
DSelect actuator
test item No. 02.Relay is forcibly drivenON
No.24
53Throttle
solenoid
Ignition switch: ON (Engine stops)OFFCode No.
41
13E-20
solenoid
valveEngine: main sensor or actuator is failedON41
55Engine
warningDIgnition switch:
ON
S
Engine warning lamp
offOFFProcedure
No. 313E-30
g
lampDSelect actuator
test item No. 16.Engine warning lamp is
forced onON
56Glow lampDIgnition switch:
ONGlow lamp offOFF––
ON
DSelect actuator
test item No. 15.Glow lamp is forced onON
60Fuel cut
relay
DIgnition switch: ON
DSelectactuator
Relay not drivenOFFProcedure
No21
13E-37
relayDSelectactuator
test item No. 27.Relay is forcibly drivenONNo.21
62AT/MT
switchIgnition switch: ONVehicles with M/TM/T––
73EGR control
solenoidEngine: After warming
up the engineIdling under no load
(stable condition)OFFProcedure
No. 2213E-38
valve No. 1
pg
Engine is suddenly
raced (EGR amount
decreasing)OFF
Engine is suddenly
raced (EGR amount
increasing)ON (momen-
tarily)
74EGR control
lid
Engine: After warming
hi
Idling (stable condition)ONProcedure
N
13E-38
solenoid
valve No. 2
gg
up the engineWhen engine is sud-
denly raced (EGR
amount decreasing)OFF (mo-
mentarily)No. 23
When engine is sud-
denly raced (EGR
amount increasing)ON


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-45
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be determined
as normal Inspection
conditions Drive Con-
tents Check item
27Fuel cut solenoid
valveTurn the
solenoid
valve from
OFF to ON or
from ON to
OFF.DIgnition
switch: ON
DVehicle
speed:
0 km/hMakes an audible
sound––
34Middle position
of GE actuatorHold the
injection
governor in
its middle
position.DIgnition
switch: ONWhen the crankshaft
is turned clockwise
during the adjustment
of the injection timing,
the injection pipes
spray out fuel.Code No.
4813E-23
35Variable
geometry
solenoid valveTurn the
solenoid
valve to ONIgnition switch:
ONMakes an audible
soundCode No.
4913E-24
36Turn the
solenoid
valve to OFFEngine: IdlingOperating sound and
vibration, which
accompany with the
duty activation, cease.
37EGR control
solenoid valve
No. 1Turn the
solenoid
valve from
OFF to ON
from ON to
OFFIgnition switch:
ONMakes an audible
soundProcedure
No. 2213E-38
38EGR control
solenoid valve
No. 2Turn the
solenoid
valve from
OFF to ON
from ON to
OFFIgnition switch:
ONMakes an audible
soundProcedure
No. 2313E-38


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-48
Terminal
No.Normal condition: Inspection conditions (engine status) Check item
88Boost air temperature
sensorIgnition switch: ONIntake air temperature:
0_C3.2 - 3.8 V
Intake air temperature:
20_C2.3 - 2.9 V
Intake air temperature:
40_C1.4 - 2.0 V
Intake air temperature:
80_C0.4 - 1.0 V
89Crank angle sensorEngine: Idling (Use a digital voltage meter to check.)0V↔5V
(repeat the change)
90EGR valve position
sensor
Engine: After warm-
inguptheengine
Idling under no load2.3 - 3.3 V
sensoring up the engineEngine is suddenly racedMomentarily drops from
voltage during idling
91Parking switchIgnition switch: ON
(Enginestops)
Parking brake: ON0-1V
(Engine stops)Parking brake: OFFSystem voltage
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to LOCK (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-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-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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17-2
EVAPORATIVE EMISSION CONTROL
SYSTEM 36..............................
General Information 36......................
System Diagram 36.........................
Component Location 36......................
Purge Control System Check 37..............
Purge Port Vacuum Check 37................
Purge Control Solenoid Valve Check 38.......
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM 39..............................
General Information 39......................
Operation 39................................
System Diagram 39.........................
Component Location 39......................
Exhaust Gas Recirculation (EGR) Control
System Check 40...........................
EGR Valve (Stepper Motor) Check 40........
EGR VALVE 42...........................
CANISTER 43............................
CATALYTIC CONVERTER 44..............
General Information 44......................
EMISSION CONTROL SYSTEM
<4D5> 45.............................
GENERAL INFORMATION 45..............
SERVICE SPECIFICATIONS 45............
SEALANT 45.............................
SPECIAL TOOL 45.......................
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM 46..............................
General Information 46......................
System Diagram 46.........................
Component Location 46......................
Function Check 47..........................
EGR Solenoid Valve Operation Check 47.....
EGR Solenoid Valve Resistance Check 48....
Lever Position Sensor (LPS) Adjustment 48...
Engine Speed Sensor Check 49..............
Engine Coolant Temperature Sensor
Check 49...................................
CHECK AT THE GLOW & EGR CONTROL
UNIT 51..................................
EMISSION CONTROL SYSTEM
<4M4-VEHICLES WITH EGR> 52........
GENERAL INFORMATION 52..............
SERVICE SPECIFICATIONS 52............
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM 53..............................
General Information 53......................
System Diagram 53.........................
Component Location 53......................
Function Check 54..........................
EGR Solenoid Valve Operation Check 54.....
EGR Solenoid Valve Resistance Check 55....
Accelerator Pedal Position Sensor (APS),
Engine Coolant Temperature Sensor, Intake
Air Temperature Sensor, Fuel Temperature
Sensor Check 55............................
Check at Engine-ECU 55....................
CATALYTIC CONVERTER 55..............
General Information 55......................


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ENGINE AND EMISSION CONTROL -Emission Control System <6G7>17-31
EMISSION CONTROL SYSTEM <6G7>
GENERAL INFORMATION
The emission control system consists of the following subsystems:
DCrankcase emission control system
DEvaporative emission control system
DExhaust emission control system
ItemsNameSpecification
Crankcase emission
control systemPositive crankcase ventilation (PCV) valveVariable flow type
(Purpose: HC reduction)
Evaporative emission
control systemCanister
Purge control solenoid valveEquipped
Duty cycle type solenoid valve
(Purpose: HC reduction)
Exhaust emission
control systemAir-fuel ratio control device - GDI systemOxygen sensor feedback type
(Purpose: CO, HC, NOx reduction)
Exhaust gas recirculation system
DEGR valveEquipped
Stepper motor type
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
EMISSION CONTROL DEVICE REFERENCE TABLE
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel
ratio
control
systemCatalytic
converterExhaust
gas
recirculation
systemReference
page
PCV valve´17-35
Purge control solenoid valve´17-38
GDI system component´´GROUP
13A
Catalytic converter´17-44
EGR valve´17-40


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