check engine MITSUBISHI MONTERO 2000 Service Repair Manual

GDI -Troubleshooting13A-5
DATA LIST REFERENCE TABLE
The data list has been changed as the engine-ECU and the engine-A/T-ECU have been changed. The
other items are the same as for M/T.
Item
No.Inspection
itemInspection contentsNormal conditionInspec-
tion pro-
cedure
No.Refer-
ence
page
22Crank angle
sensorDEngine: Cranking
DTachometer:
ConnectedCompare the engine
speed readings on
the tachometer and
the MUT-II.AccordCode
No.
P033513A-56*
DEngine: Idling
DIdle position
switch: ONWhen engine
coolant temperature
is - 20_C1,300 - 1,500
r/min
When engine
coolant temperature
is 0_C1,300 - 1,500
r/min
When engine
coolant temperature
is 20_C1,250 - 1,450
r/min
When engine
coolant temperature
is 40_C1,100 - 1,300
r/min
When engine
coolant temperature
is 80_C (more than
four minutes later
after engine has
started)600 - 800 r/min
A1LOxygen
sensorEngine: After having
warmed up. (Air/fuel
mixture is made
leaner when deceler-When at 4,000
r/min, engine is
decelerated200 mV or lessCode
No.
P013013A-28*
leanerwhendeceler
ating, and is made
richer when racing.)Rev the engine.600 - 1000 mV
Engine: After having
warmed up (The
oxygen sensor signal
is used to check the
air/fuel mixture ratio,
and control condition
isalsocheckbythe
Engine is idling
(more than 4
minutes later after
engine has started)Voltage should
alternate between
400 mV or less
and 600 - 1,200
mV (more than 4
minutes after the
enginehasisalso checkbythe
engine-ECU
or engine-A/T-ECU
.)
2,500 r/min
enginehas
started).
24LVehicle
speed sen-
sorDrive at 40 km/hApproximately 40
km/hCode
No.
P050013A-63*


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GDI -Troubleshooting13A-6
Item
No.Refer-
ence
page Inspec-
tion pro-
cedure
No. Normal condition Inspection contents Inspection
item
81LLearned
valueEngine: Warm, 2,500 r/min without any load
(during closed loop lambda control)- 10 - 10 %Code
No.
P017013A-34*
82LClosed loop
controlEngine: Warm, 2,500 r/min without any load
(during closed loop lambda control)- 25 - 25 %Code
No.
P017013A-34*
87LEngine loadEngine: After having
warmed upIdling (more than 4
minutes later after
the engine has
started)20 - 40 %--
2,500 r/min10 - 30 %
8ALThrottle
position
sensor(1st
DEngine: After hav-
ing warmed up
DIgnitionswitch:ON
Release the
accelerator pedal.0 - 20 %Code
No.
P0120
13A-25*
sensor(1st
channel)
(throttle
valve angle)DIgnition switch:ON
(Engine: stopped)Depress the
accelerator pedal.Increase in
proportion to the
pedal strokeP0120
Depress the
accelerator pedal
fully.80 - 100 %
NOTE
L: will not displayed if service data is selected on the check mode.
*: Refer to the 2001 PAJERO Workshop Manual (Pub.No. PWJE0001)


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GDI -Troubleshooting/On-vehicle Service13A-7
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
Engine-A/T-ECU Connector Terminal Arrangement
The terminals below have been changed as the engine-A/T-ECU has been changed. The other terminals
are the same as before.
Terminal No.Check itemCheck requirements (Engine condition)Normal condition
3Oxygen sensor heat-
er(front)
Engine: Idling0-3V
er(front)
Engine: 3,500 r/minSystem voltage
26Oxygen sensor heat-
er(rear)
Engine: Idling0-3V
er(rear)
Engine: 3,500 r/minSystem voltage
71Oxygen sensor (front)Engine: Warmed up, and then hold the engine
speed at 2,500 r/min (Use a digital voltmeter)0 and 0.8 V alternate.
73Oxygen sensor (rear)DTransmission: 2nd gear
DEngine speed: 3,500 r/min or more
DDriving with the throttle valve widely open0.6 - 1.0 V
Engine-A/T-ECU Harness-side Connector Terminal Arrangement
The terminals below have been changed as the engine-A/T-ECU has been changed. The other terminals
are the same as before.
Terminal No.Check itemStandard value, normal condition (check conditions)
3-41Oxygen sensor heater (front)11 - 1 8Ω(at 20_C)
26 - 41Oxygen sensor heater (rear)11 - 1 8Ω(at 20_C)
ON-VEHICLE SERVICE
OXYGEN SENSOR CHECK
On A/T, a dual oxygen sensor has been adopted. Its service
procedure is the same as for the previous M/T.


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13B-1
DIESEL FUEL
<4D5>
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 2.................
SPECIAL TOOL 2............................
ON-VEHICLE SERVICE 2.....................
Fuel Injection Timing Check and Adjustment 2...
Engine Idle Speed Check and Adjustment 2......
Evacuation of Water from Fuel Filter 2..........Evacuation of Air from Fuel Line 3..............
Fuel Filter Cartridge Replacement 3.............
Fuel Injection Pump Check 3...................
Boost Compensator Check 4....................
Injection Nozzle Check and Adjustment 4........INJECTION NOZZLE 6.......................
INJECTION PUMP 10........................


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13C-1
DIESEL FUEL
<4M4>
CONTENTS
GENERAL INFORMATION 2...................
SERVICE SPECIFICATIONS 3.................
SEALANT 3..................................
SPECIAL TOOLS 4...........................
TROUBLESHOOTING 5.......................
ON-VEHICLE SERVICE 42...................
Injection Timing Check and Adjustment 42.........
Idle Speed Check and Adjustment 42.............
Accelerator Pedal Position Sensor (APS)
Adjustment 42.................................
Control Relay Continuity Check 43................
Accelerator Pedal Position Sensor (APS) Check 43.Idle Switch Check 43...........................
Boost Air Temperature Sensor (Intake Air
Temperature Sensor) Check 44..................
Engine Coolant Temperature Sensor Check 44.....
Evacuation of Water from Fuel Filter 45...........
Fuel Filter Cartridge Replacement 45.............
Evacuation of Air from Fuel Line 45...............
Fuel Injection Pump Check 46...................
Intake Air Restriction Equipment Check 48.........
Injection Nozzle Check and Adjustment 49.........
INJECTION NOZZLE 50......................
INJECTION PUMP 56........................
ENGINE-ECU 59............................


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DIESEL FUEL <4M4> -Troubleshooting13C-7
INSPECTION CHART FOR DIAGNOSIS CODES
Code No.Diagnosis itemReference
page
11Accelerator pedal position sensor (main) system13C-8
12*Boost pressure sensor system13C-9
13Barometric pressure sensor (ECU built-in) system13C-10
14Fuel temperature sensor system13C-10
15Engine coolant temperature sensor system13C-11
16Boost air temperature sensor system13C-11
17Vehicle speed sensor system13C-12
18Engine speed sensor (backup) system13C-13
21Engine speed sensor system13C-14
23Idle switch (accelerator pedal position sensor built-in) system13C-15
25*Timer piston position sensor system13C-16
26*Control sleeve position sensor system13C-17
27Accelerator pedal position sensor (sub) system13C-18
41*Main throttle solenoid valve system13C-19
43Timing control valve system13C-20
46Injection correction ROM system13C-21
48*GE actuator (in the middle of control sleeve position sensor inoperative) system13C-21
49*Over boost (turbocharger waste gate malfunction)13C-22
54Immobilizer system13C-22
Caution
If the the above-mentioned diagnosis code number with the asterisks can be displayed along with
another code number in parentheses simultaneously, check the other code number before replacing
the engine-ECU.
12 (41, 49), 26 (48), 25 (43), 41 (12, 49), 48 (26), 49 (12, 41)


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DIESEL FUEL <4M4> -Troubleshooting13C-8
INSPECTION PROCEDURE FOR DIAGNOSIS CODE
Code No. 11 Accelerator pedal position sensor systemProbable cause
Range of Check
DIgnition switch: ON, acceleratorpedal positionsensor (sub) operative, except
for during enginecranking
Set Conditions
DOutput voltage of accelerator pedal positionsensor (sub) for one second is
0.2 V or higher and lower than 2.5V. Output voltage of acceleratorpedal
position sensor (main) for one second is 4.5V or higher, or lower than 0.2V.
Range of Check
DIgnition switch:ON, except for duringenginecranking
Set Conditions
DThe output voltage of accelerator pedal positionsensor (main and sub) for
0.2 second is 0.2V or higher, or lower than 4.5V and the difference in
sensor output voltage between themain and sub is 1V or higher, or idle
switch:ON, and sensormain output voltage is 1.875V or higher.DAcceleratorpedal positionsensor inoperative
DAcceleratorpedal positionsensoropencircuit,
short circuit, or connector contact inoperative
DEngine-ECU inoperative
OK
OK
Measure at D-135 acceleratorpedal position
sensor connector
DDisconnect the connector and measure
at the harness side.
DVoltage between 2 and earth
(Ignition switch: ON)
OK:
4.5 - 5.5 V
DContinuity between 1 and earth
OK:
ContinuityNGCheck the following connector:
D-113NG
Repair
OK
OKRepair
NGAcceleratorpedal positionsensor check
(Refer to P.13C-37.)Replace
Check the trouble symptoms.
Replace the engine-ECU.NG
Check the trouble symptoms.
NG
Replace the engine-ECU.
NG
RepairCheck the following connectors:
D-113, D-135
OK NG
NG
Check the following connector:
D-113NG
Repair
OK
Check the harness between the
engine-ECU and the accelerator pedal
position sensor connector.
Check the trouble symptoms.
OK
Measure at D-113 engine-ECU connector
DConnect the connector.
DVoltage between 84 and the earth
(Ignition switch: ON)
OK:
0.9 - 1.1 V
(Throttle leveridling position)
4.1 V or higher
(Throttle lever fullyopened position)
Check the harness between the
engine-ECU and the accelerator pedal
position sensor connector.


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DIESEL FUEL <4M4> -Troubleshooting13C-9
Code No. 12 Boost pressure sensor (boost sensor)
systemProbable cause
Range of Check
DIgnition switch: ON, except for duringenginecranking
Set Conditions
DSensor output voltage for one second is 4.5 Vor higher
(boost pressure is approximately 306.7kPa).
or
DSensor output voltage for one second is 0.2 Vor lower
(boost pressure is approximately 20kPa or lower)
Range of Check
DEngine speed is 1600 r/min or higher and the accelerationopening degree is
60% or more.
Set Conditions
DBoost pressure is lower than the barometric pressure + 13 kPa for two
seconds.DBoost pressure sensor inoperative
DBoost pressure sensoropencircuit, short circuit,
or connector contact inoperative
DBoost pressure sensor hose disconnected
DEngine-ECU inoperative
Check the harness between the
engine-ECU and the boost pressure
sensor connector.
NG
Check the trouble symptoms.
Replace the engine-ECU.
Check the following connector:
D-113
NGOK
NG
Repair
RepairOK
NG
Replace the engine-ECU.
OKOK
OK
Check the following connector:
A-120NG
Check the trouble symptoms. NG
Repair
NG
NG
Check the vacuum hose between the
boost pressure sensor and the intake
manifold.
Replace the boost pressure sensor.
OK OK OK
Repair
NG
Repair
Check the trouble symptoms.
Check the harness between the
engine-ECU and the boost pressure
sensor connector, and repair if
necessary.
NG OK
NG
RepairCheck the following connector:
B-08NG
Measure at B-08 boost pressure
sensor connector
DConnect the connector.
(Test harness: MB991348 used)
DVoltage between 1 and the earth
(Engine: Idling)
OK:
1.2 - 1.6 V
DVoltage between 1 and the earth
OK:
When the accelerator pedal
is suddenly pressed from
the idling condition, the
voltage temporarily in-
creases from 1.2 V to 1.6
V.
Measure at D-113 engine-ECU
connector
DConnect the connector.
DVoltage between 85 and the
earth (Engine: Idling)
OK:
1.2 - 1.6 V
Check the harness between the
engine-ECU and the boost pressure
sensor connector.
Measure at B-08 boost pressure
sensor connector
DDisconnect the connector and
measure at the harness side.
DVoltage between 3 and the earth
(Ignition switch: ON)
OK:
4.5 - 5.5 V
DContinuity between 2 and the
earth
OK:
Continuity


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DIESEL FUEL <4M4> -Troubleshooting13C-10
Code No. 13 Barometric pressure sensor systemProbable cause
Range of Check
DIgnition switch: ON, except for duringenginecranking
Set Conditions
DThe sensor output voltage is for 3 seconds is 4.5V or higher (the barometric
pressure is approximately 120 kPa or over).
or
DThe sensor output voltage is for 3 seconds is 1.5V or lower (the barometric
pressure is approximately 33 kPa or under).Engine-ECU inoperative
Replace the engine-ECU.NGCheck the trouble symptoms.
Code No. 14 Fuel temperature sensor systemProbable cause
Range of Check
DIgnition switch: ON, except for duringenginecranking
Set Conditions
DThe sensor output voltage for 3 seconds is 0.2V or higher (the fuel
temperature is approximately 120°C or higher).
or
DThe sensor output voltage for 3 seconds is 4.6V or lower (the fuel
temperature is approximately 50°C or lower).DFuel temperature sensor inoperative
DFuel temperature sensoropencircuit, short circuit,
or connector contact inoperative
DEngine-ECU inoperative
OK
Measure at B-38 fuel temperature sensor
connector
DDisconnect the connector and measure at
the harness side.
DVoltage between 11 and the earth
(Ignition switch: ON)
OK:
4.5 - 5.5 V
DContinuity between 7 and the earth
OK:
ContinuityNGCheck the following connectors:
D-112, D-113NG
Repair
OK
OK
Check the harness between the
engine-ECU and the fuel temperature
sensor connector.Repair
NG
Check the trouble symptoms.
Replace the engine-ECU.NG
Replace the engine-ECU.OKNG
Replace the injection pump.
OK
Repair
Check the following connector:
B-38
NG
NGCheck the trouble symptoms.
Fuel temperature sensor check (Refer to
P.13C-47.)


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DIESEL FUEL <4M4> -Troubleshooting13C-11
Code No. 15 Engine coolant temperature sensor systemProbable cause
Range of Check
DIgnition switch: ON, except for duringenginecranking
Set Conditions
DThe sensor output voltage for 3 seconds is 4.9V or higher (the coolant
temperature is approximately - 45_C or lower).
or
DThe sensor output voltage for 3 seconds is 0.2V or lower (the coolant
temperature is approximately 140_C or higher).DEngine coolant temperature sensor inoperative
DEngine coolant temperature sensoropencircuit,
short circuit, or connector contact inoperative
DEngine-ECU inoperative
OK
NGNG
Repair
OK
OKRepair
NGEngine coolant temperature sensor check
(Refer to P.13C-38.)
Replace the engine-ECU.NG
Replace the engine-ECU.OK NG
OK
Repair
Check the following connector:
B-36-3
NGCheck the trouble symptoms.NG
Measure at B-36-3 engine coolantsensor
connector
DDisconnect the connector and measure at
the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
OK:
4.5 - 5.5 V
DContinuity between 2 and the earth
OK:
ContinuityCheck the following connectors:
B-36, D-112, D-113
Check the harness between the
engine-ECU and the engine coolant
temperature sensor connector.
Check the trouble symptoms. Replace
Code No. 16 Boost air temperature sensor (intake air
sensor) systemProbable cause
Range of Check
DIgnition switch:ON, except for duringenginecranking
Set Conditions
DThe sensor output voltage for 3 seconds is 4.6V or higher (the coolant
temperature is approximately 45_C or lower).
or
DThe sensor output voltage for 3 seconds is 0.3V or lower (the coolant
temperature is approximately 110_C or higher).DBoost air temperature sensor inoperative
DBoost air temperature sensoropencircuit, short
circuit, or connector contact inoperative
DEngine-ECU inoperative
OK
Measure at B-49 boost air temperature
connector
DDisconnect the connector and measure at
the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
OK:
4.0 - 5.3 V
DContinuity between 2 and the earth
OK:
ContinuityNGCheck the following connectors:
D-112, D-113NG
Repair
OK
OKRepair
NGBoost air temperature sensor check
(Refer to P.13C-44.)
Check the trouble symptoms.
Replace the engine-ECU.NG
Replace the engine-ECU.OK NG
OK
Repair
Check the following connector:
B-49Replace
NGCheck the trouble symptoms.NG
Check the harness between the
engine-ECU and the boost air temperature
sensor connector.


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