check engine MITSUBISHI MONTERO 2000 Service Repair Manual
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 2000, Model line: MONTERO, Model: MITSUBISHI MONTERO 2000Pages: 1839, PDF Size: 29.19 MB
Page 604 of 1839
MITSUBISHI SC-Troubleshooting13E-15
DATA LIST REFERENCE TABLE
The following ECU input data items can be read using the MUT-
II.
Item
No.Check itemInspection conditionsNormal condition
10Vehicle speedWhen vehicle is being drivenSpeedometer display and
MUT-IIdisplay are identical.
11AcceleratorIgnition switch:Release the accelerator pedal.0.9 - 1.1 V
pedal position
sensorONDepress the accelerator pedal gradually.Increases in response to
pedal depression stroke.
Depress the accelerator pedal fully4.0 V or more
18Power supply
voltageIgnition switch: ONSystem voltage
19Accelerator
pedal positionIgnition switch:
ONRelease the accelerator pedalON
pedal position
switch (Idle
switch)ON
Depress the accelerator pedal slightly.OFF
20Ignition switchIgnition switch: ONON
Ignition switch: OFFOFF
22Front-right
wheel speedWhen vehicle is being drivenSpeedometer display and
MUT-IIdisplay are identical.
28Engine typeVehicles with the 6G74 engine6G74
Vehicles with the 4M41 engine4M41
30Trace controlSC system control is activeON
SC system control is not activeOFF
31Engine specifi-Vehicles with the 6G74 engineDOHC
cation 1Vehicles with the 4M41 engine-
32Engine specifi-Vehicles with the 6G74 engineN/A
cation 2Vehicles with the 4M41 engine-
33Engine specifi-Vehicles with the 6G74 engineMIVEC/ETV
cation 3Vehicles with the 4M41 engine-
35Destination-EC
40Engine speedDepress the accelerator pedal gradually.Tachometer display and
MUT-IIdisplay are identical.
51Inhibitor switchIgnition switch:Selector lever position: PP
ONSelector lever position: RREngine:
stopped
Selector lever position: NN
Selector lever position: DD
52Shift positionSelector lever
position: sportsDriving at a constant speed of 10 km/h in
1st1st
modeDriving at a constant speed of 30 km/h in
2nd2nd
Driving at a constant speed of 50 km/h in
3rd3rd
Driving at a constant speed of 50 km/h in
4th4th
Driving at a constant speed of 70 km/h in
5th5th
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Page 607 of 1839
MITSUBISHI SC-Troubleshooting/On-vehicle Service13E-18
Terminal No.Signal nameNormal condition
Between terminal 13 and body earthEarthContinuity
Between terminal 26 and body earthEarth
Between terminal 31 and body earthEarth
ON-VEHICLE SERVICE
OPERATION TEST OF MITSUBISHI SC
1. Connect the MUT-
IIto the 16-pin diagnosis connector.
Caution
Turn the ignition switch to the LOCK (OFF) position
when connecting and disconnecting the MUT-
II.
2. Move the shift lever to the neutral
lever to the P range.
3. Start the engine.
4. Use the MUT-
IIto activate the Actuator Test (item No.05)
while depressing the accelerator pedal fully. Check that
the engine speed should decrease gradually.
Caution
Activate the Actuator Test for three seconds.
Release the accelerator pedal immediately after the
Actuator Test is complete, or the engine speed will
rise.
NOTE
During the Actuator Test, the SC-ECU transmits the signal,
which requests no torque and wide open throttle, to the
engine-ECU or engine-A/T-ECU for three seconds.
WHEEL SPEED SENSOR (FR) CHECK
Refer to Basic Manual GROUP 35B - On-vehicle service.
VEHICLE SPEED SENSOR CHECK
Refer to Basic Manual GROUP 54A - Combination Meter.
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Page 611 of 1839
13E-1
DIESEL FUEL
<4D5-STEPIII
>
CONTENTS
GENERAL 2.................................
Outline of Change 2............................
GENERAL INFORMATION 2...................
SERVICE SPECIFICATIONS 4.................
SEALANT 4..................................
SPECIAL TOOLS 5...........................
TROUBLESHOOTING 6.......................
ON-VEHICLE SERVICE 55....................
Injection Nozzle Check and Adjustment 55.........
Injection Timing Check and Adjustment 55.........
Idle Speed Check and Adjustment 55.............
Accelerator Pedal Position Sensor (APS)
Adjustment 56.................................
Control Relay Continuity Check 57................
Accelerator Pedal Position Sensor (APS)
Check 57......................................Idle Switch Check 58............................
Boost Air Temperature Sensor (Intake Air
Temperature Sensor) Check 58..................
Engine Coolant Temperature Sensor Check 59.....
Evacuation of Water from Fuel Filter 59............
Fuel Filter Cartridge Replacement 60..............
Evacuation of Air from Fuel Line 60...............
EGR Valve Position Sensor Check 60.............
Fuel Injection Pump Check 61....................
Throttle Solenoid Valve Check 62.................
Throttle Actuator Check 63......................
Variable Geometry Solenoid Valve Check 63.......
EGR Control Solenoid Valve Check 63............
FUEL INJECTION NOZZLE 64.................
FUEL INJECTION PUMP 64...................
CRANKSHAFT POSITION SENSOR 66.........
ENGINE-ECU 66.............................
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Page 618 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-8
INSPECTION CHART FOR DIAGNOSIS CODES
Code No.Diagnosis itemReference
page
11Accelerator pedal position sensor (main) system13E-9
12*Boost pressure sensor system13E-10
13Barometric pressure sensor (ECU built-in) system13E-11
14Fuel temperature sensor system13E-11
15Engine coolant temperature sensor system13E-12
16Boost air temperature sensor system13E-12
17Vehicle speed sensor system13E-13
18Pump speed sensor system13E-14
21Crank angle sensor system13E-15
23Idle switch (accelerator pedal position sensor built-in) system13E-16
25*Timer piston position sensor system13E-17
26*Control sleeve position sensor system13E-18
27Accelerator pedal position sensor (sub) system13E-19
41*Throttle solenoid valve system13E-20
43Timing control valve system13E-21
46Injection volume adjusting ROM system13E-22
48*GE actuator (in the middle of control sleeve position sensor inoperative) system13E-23
49*Over boost (variable geometry control pressure sensor system malfunction)13E-24
51EGR valve position sensor system13E-25
52Variable geometry control pressure sensor system13E-26
54Immobilizer system13E-27
Caution
If 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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Page 619 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-9
INSPECTION PROCEDURE FOR DIAGNOSIS CODE
Code No. 11 Accelerator pedal position sensor (main)
systemProbable cause
Range of Check
DIgnition switch: ON, accelerator pedal position sensor (sub) operative, except
for during engine cranking
Set Conditions
DAccelerator pedal position sensor output voltage is as below for 1 second:
Sub side: 0.2 V or more, less than 2.5 V
Main side: 4.5 V or more
or
Sub or main side: less than 0.2 V
Range of Check
DIgnition switch: ON, except for during engine cranking
Set Conditions
DThe output voltage of accelerator pedal position sensor (main and sub) for
0.2 second is 0.2 V or higher, or lower than 4.5 V and the difference in
sensor output voltage between the main and sub is 1 V or higher, or idle
switch: ON, and sensor main output voltage is 1.875 V or higher.DAccelerator pedal position sensor inoperative
DAccelerator pedal position sensor open circuit,
short circuit, or connector contact inoperative
DEngine-ECU inoperative
NGOK
OK
Measure at D-135 accelerator pedal 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
NGAccelerator pedal position sensor check
(Refer to P.13E-57.)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.
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 lever idling position)
4.1 V or higher
(Throttle lever fully opened position)
Check the harness between the
engine-ECU and the accelerator pedal
position sensor connector.
NG
Repair NG NG
NG
NG
NG
Check the trouble symptoms.
OK
Replace the engine-ECU.
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Page 620 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-10
Code No. 12 Boost pressure sensor (boost sensor)
systemProbable cause
Range of Check
DIgnition switch: ON, except for during engine cranking
Set Conditions
DSensor output voltage for 1 second is 4.5 V or higher
(boost pressure is approximately 267 kPa).
or
DSensor output voltage for 1 second is 0.2 V or lower
(boost pressure is approximately 51.7 kPa or lower)
Range of Check
DEngine speed is 2,000 r/min or higher, barometric pressure is 69.7 kPa or
less (equivalent to an altitude of 300 m) and under high load.
Set Conditions
DBoost pressure is lower than the barometric pressure + 13 kPa for 3
seconds.DBoost pressure sensor inoperative
DBoost pressure sensor open circuit, short circuit,
or connector contact inoperative
DBoost pressure sensor hose disconnected
DEngine-ECU inoperative
NG
Check the trouble symptoms.
Replace the engine-ECU.
Check the following connector:
D-113
NGOK
NG
Repair
RepairOK
NG
Check the trouble symptoms.
OKOK
OK
Check the following connector:
B-08NG
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:1.3 - 1.7 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 1.3 V to 1.7
V.
Measure at D-113 engine-ECU
connector
DConnect the connector.
DVoltage between 85 and the
earth (Engine: Idling)
OK:1.3 - 1.7 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
Replace the engine-ECU.NGCheck the harness between the
engine-ECU and the boost pressure
sensor connector.
Replace the engine-ECU.OK
NG
Repair
Check the following connector:
D-112
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Page 621 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-11
Code No. 13 Barometric pressure sensor systemProbable cause
Range of Check
DIgnition switch: ON, except for during engine cranking
Set Conditions
DThe sensor output voltage is for 3 seconds is 4.5 V or higher (the
barometric pressure is approximately 114 kPa or over).
or
DThe sensor output voltage is for 3 seconds is 1.5 V or lower (the barometric
pressure is approximately 40 kPa or under).
Range of Check
DIgnition switch: ON
DThe coolant temperature is 40_C or lower
Set conditions
DDifference between the barometric pressure and boost pressure sensors is
13.3 kPa or moreEngine-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 during engine cranking
Set Conditions
DThe sensor output voltage for 3 seconds is 0.2 V or lower (the fuel
temperature is approximately 125°C or higher).
or
DThe sensor output voltage for 3 seconds is 4.6 V or higher (the fuel
temperature is approximately - 47°C or lower).DFuel temperature sensor inoperative
DFuel temperature sensor open circuit, 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.13E-61.)
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Page 622 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-12
Code No. 15 Engine coolant temperature sensor systemProbable cause
Range of Check
DIgnition switch: ON, except for during engine cranking
Set Conditions
DThe sensor output voltage for 3 seconds is 4.9 V or higher (the coolant
temperature is approximately - 45_C or lower).
or
DThe sensor output voltage for 3 seconds is 0.2 V or lower (the coolant
temperature is approximately 140_C or higher).DEngine coolant temperature sensor inoperative
DEngine coolant temperature sensor open circuit,
short circuit, or connector contact inoperative
DEngine-ECU inoperative
OK
NGNG
Repair
OK
OKRepair
NGEngine coolant temperature sensor check
(Refer to P.13E-59.)
Replace the engine-ECU.NG
Replace the engine-ECU.OK NG
OK
Repair
Check the following connector:B-56
NGCheck the trouble symptoms.NG
Measure at B-56 engine coolant temperature
sensor connector
DDisconnect the connector and measure at
the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
OK:4.1 - 4.9 V
DContinuity between 2 and the earth
OK:ContinuityCheck the following connectors:
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 during engine cranking
Set Conditions
DThe sensor output voltage for 3 seconds is 4.6 V or higher (the intake air
temperature is approximately - 45_C or lower).
or
DThe sensor output voltage for 3 seconds is 0.3 V or lower (the intake air
temperature is approximately 110_C or higher).DBoost air temperature sensor inoperative
DBoost air temperature sensor open circuit, 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.13E-58.)
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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Page 623 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-13
Code No. 17 Vehicle speed sensor systemProbable cause
Range of Check
DIgnition switch: ON
DEngine speed: 2,800 r/min or higher
DDriving with heavy load
Set Conditions
DSlower than vehicle speed of 3 km/hDVehicle speed sensor inoperative
DVehicle speed sensor open circuit, short circuit, or
connector contact inoperative
DEngine-ECU inoperative
Replace the engine-ECU.
NG
OK
Check trouble symptoms.
NG
OK
Check trouble symptom.
NG
Check the following connectors:
C-09, D-113, E-113NG
Repair
YES
Measure at engine-ECU connector D-113.
DDisconnect the connector.
DVoltage between terminal 86 and earth (Ignition switch: ON)
OK:When the vehicle is pushed to move, the cycle change
of 0.5 V is repeated.Check the following
connector:
D-113NG
Repair
Is the speedometer working properly?NO
Check the harness wire between the engine-ECU and the vehicle
speed sensor connector, and repair if necessary.
Check the vehicle speed sensor circuit.
OK
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Page 624 of 1839
DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-14
Code No. 18 Pump speed sensor systemProbable cause
Range of Check
DIgnition switch: ON
DNot during the engine cranking
Set Conditions
DThe difference between the pump speed sensor and the crank angle sensor
output value is 500 r/min or higher for 4 secondsDMalfunction of pump speed sensor
DOpen circuit or short-circuit in pump speed sensor
circuit, or poor sensor contact
DEngine-ECU inoperative
NG
Replace the engine-ECU.OK
Check trouble symptoms.NG
Repair
NG
Check the harness between the
engine-ECU and the pump speed sensor
connector, and repair if necessary.
OK
Replace the injection pump.
OK
Measure at engine-ECU connector D-112.
DConnect the connector.
DVoltage between 51 - 61.
(Engine: idling and then raced)
OK:Voltage increases from the voltage
when engine is idlingNGCheck the following connector:
B-36, D-112NG
Repair
OK
NGPump speed sensor check (Refer to
P.13E-62.)
Check the following connector:D-112
Check the trouble symptoms.
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