MITSUBISHI MONTERO 2000 Service Repair Manual
Manufacturer: MITSUBISHI, Model Year: 2000, Model line: MONTERO, Model: MITSUBISHI MONTERO 2000Pages: 1839, PDF Size: 29.19 MB
Page 221 of 1839
S
ER VIC E SPEC IF IC ATIO NS
I te m S
ta ndard va lu e A
dju stm ent vo lt a ge of th ro ttle posit io n se nso r (1 st ch annel) V 0
.4 -0.6 A
dju stm ent vo lt a ge of th ro ttle posit io n se nso r (2 nd ch annel) V 4
.2 -4.8 T
hro ttle posit io n se nso r re sis ta nce kW A
dju stm entvo lt a ge ofa cce le ra to r pedalp osit io n se nso rs 1 and 2 V 0
.9 85 -1.0 85 R
esis ta nce of acce le ra to r pedalp osit io n se nso rs 1 and 2kW I
n ta ke air te m pera tu re se nso r re sis t- a
t 20_C 2
.3 -3.0 a
nce kW 0
.3 0 -0.4 2 E
ngin e co ola nt te m pera tu re se nso r a
t 20_C 2
.1 -2.7 r
e sis ta nce kW 0
.2 6 -0.3 6 F
uelp re ssu re H
ig h-p re ssu re sid e MPa 4
-6.9 L
ow -p re ssu re sid e kP a A
ppro xim ate ly 329 I
n je cto r co il re sis ta nce (a t 20_C )W O
xyg en se nso r outp utvo lt a ge V (d urin g re vvin g) 0
.6 -1.0 O
xyg en se nso r heate r re sis ta nce (a t 20_C )W T
hro ttle co ntr o lse rv o co il re sis ta nce (a t 20_C )W S
pecif ie d se ala nt R
em ark E
ngin e co ola nt te m pera tu re se nso r 3
M Nut Lockin g Part No.4 171 or
e quiv a le nt D
ry in g se ala nt N
um ber N
am e U
se M
B991502 M
UT-II su b as-
s e m bly
Page 222 of 1839
M
B991348,
M B991658 T
e st harn ess se t M
B991709 M
B991519 A
lt e rn ato r harn ess
c o nnecto r T
ro uble sh ootin g -vo lt a ge measu re m ent M
D998478 T
e st harn ess
( 3 -p in , sq uare ) M
D998464 T
e st harn ess
( 4 -p in , sq uare ) O
xyg en se nso r ch eck M
B991529 D
ia gnosis co de
c h eckin g harn ess T
a ke a re adin g of th e dia gnosis co des M
D998709 A
dapto r hose F
uelp re ssu re measu re m ent M
D998742 H
ose adapto r M
B991637 F
uel pre ssu re
g auge se t
Page 223 of 1839
T
R O UBLE SH O OTIN G
S TA NDARD FLO W OF DIA G NO STIC
T R O UBLE SH O OTIN G
R efe r to GRO UP 00 -H ow to Use Tro uble sh ootin g/In sp ectio n
S erv ic e Poin ts .
N O TE
W hen re pla cin g th e engin e-E C U, re pla ce im mobiliz e r-E C U
a nd ig nit io n ke y as well at th e sa m e tim e.
D IA G NO SIS FU NCTIO N
E N G IN E WARNIN G LA M P (C HEC K EN G IN E LA M P)
I f an abnorm alit y occu rs in any of th e fo llo w in g it e m sre la te d
t o th e GDIsyste m ,th e engin e warn in g la m p will illu m in ate
o r fla sh .
I f th e la m pre m ain s illu m in ate d or if th e la m p illu m in ate s while
t h e engin e is ru nnin g, ch eck th e dia gnosis co de outp ut.
E ngin e warn in g la m p in sp ectio n it e m s
C ode No. D
ia gnosis it e m - E
ngin e-E C U P
0100 A
ir flo w se nso r syste m P
0105 B
aro m etr ic pre ssu re se nso r syste m P
011 0 I
n ta ke air te m pera tu re se nso r syste m P
011 5 E
ngin e co ola nt te m pera tu re se nso r syste m P
0120 L P
0125 F
eedback syste m P
0130 O
xyg en se nso r (fr o nt) syste m
0135 O
xyg en se nso r heate r (fr o nt) syste m
0136 O
xyg en se nso r (re ar) syste m
0141 O
xyg en se nso r heate r (re ar) syste m
0170 A
bnorm alfu els yste m P
0190 L P
0201 N
o.1 in je cto r syste m P
0202 N
o.2 in je cto r syste m P
0203 N
o.3 in je cto r syste m P
0204 N
o.4 in je cto r syste m P
0205 N
o.5 in je cto r syste m
Page 224 of 1839
GDI -Troubleshooting
Code No. Diagnosis item
P0206No.6 injector system
P0220LAccelerator pedal position sensor (1st channel) system
P0225LThrottle position sensor (2nd channel) system
P0300LIgnition coil (power transistor) system
P0301No.1 cylinder misfire detected.
P0302No.2 cylinder misfire detected.
P0303No.3 cylinder misfire detected.
P0304No.4 cylinder misfire detected.
P0305No.5 cylinder misfire detected.
P0306No.6 cylinder misfire detected.
P0335Crank angle sensor system
P0340Camshaft position sensor system
P0403EGR valve system
P0420Catalyst malfunction
P0443Purge control solenoid valve system
P1200Injector driver system
P1220LElectronic-controlled throttle valve system
P1221LThrottle valve position feedback system
P1222LThrottle control servo system
P1223LCommunication line system with throttle valve controller
P1225LAccelerator pedal position sensor (2nd channel) system
P1226LThrottle valve controller system
NOTE
1. If the engine warning lamp illuminates because of a malfunction of the engine-ECU, communication
between MUT-
IIand the engine-ECU is impossible. In this case, the diagnosis code cannot be read.
2. After the engine-ECU has detected a malfunction, the engine warning lamp illuminates when the
engine is next turned on and the same malfunction is re-detected. However, for items marked with
a“
L” in the diagnosis code number column, the engine warning lamp illuminates only on the first
detection of the malfunction.
If diagnosis code P0120, P0220, P0225 or P1225 is set, the engine warning lamp will flash. If the
1st and 2nd channels of the throttle postion sensor or the acccelerator pedal position sensor fail
at the same time, the engine warning lamp will also flash.
3. After the engine warning lamp illuminates, it will be switched off under the following conditions.
(1) When the engine-ECU monitored the power train malfunction three times* and met set condition
requirements, it detected no malfunction.
*: In this case, “one time” indicates from engine start to stop.
(2) For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature,
etc.) are similar to those when the malfunction was first recorded.
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Page 225 of 1839
GDI -Troubleshooting
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
METHOD OF READING AND ERASING DIAGNOSIS
CODES
Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points.
DIAGNOSIS USING DIAGNOSIS 2 MODE
1. Switch the diagnosis mode of the engine control unit
to DIAGNOSIS 2 mode using the MUT-II.
2. Carry out a road test.
3. Take a reading of the diagnosis code and repair the
problem location.
4. Turn the ignition switch to OFF and then back to ON
again.
NOTE
By turning the ignition switch to OFF, the ENGINE-ECU will
switch the diagnosis mode from DIAGNOSIS 2 mode to
DIAGNOSIS 1 mode.
5. Erase the diagnosis codes.
INSPECTION USING MUT-II
DATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function. If there is an abnormality, check
and repair the chassis harnesses and components.
2. After repairing, re-check using the MUT-IIand check that
the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II, and then start the engine again and
carry out a road test to confirm that the problem has
disappeared.
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Page 226 of 1839
GDI -Troubleshooting
FREEZE FRAME DATA
When the engine-ECU detects a malfunction and stores a
diagnosis code, it also stores a current status of the engine.
This function is called “Freeze frame data.” By analyzing
this “freeze frame” data with the MUT-II, an effective
troubleshooting can be performed.
Data itemUnit
Engine coolant temperature sensor_C
Engine speedr/min
Vehicle speedkm/h
Long-term fuel compensation (long-term
fuel trim)%
Short-term fuel compensation (short-term
fuel trim)%
Fuel control condi-Open loopOL
tion
Closed loopCL
Open loop owing to
drive conditionOL-DRV.
Open loop owing to
system malfunctionOL-SYS.
Closed loop based
on one oxygen sen-
sorCL-H02S
Calculation load value%
Diagnosis code during data recording-
NOTE
If malfunctions have been detected in multiple systems, store
one malfunction only, which has been detected first.
READINESS TEST STATUS
The engine-ECU monitors the following main diagnosis items,
judges if these items are in good condition or not, and the
stores its history. This history can be read out by using MUT-II.
(If the ECU has judged a item before, the MUT-II displays
“Complete.”)
In addition, if diagnosis codes are erased or the battery
cable is disconnected, this history will also be erased (the
memory will be reset).
DCatalyst: P0420
DOxygen sensor: P0130
DOxygen sensor heater: P0135, P0141
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Page 227 of 1839
GDI -Troubleshooting
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled
by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning itemControl contents during malfunction
Air flow sensor1. Suspends lean burn operation.
2. Uses the throttle position sensor signal and engine speed signal (crank angle
sensor signal) to take reading of the basic injector drive time and basic ignition
timing from the pre-set mapping.
Intake air temperature sensorControls as if the intake air temperature is 25_
C.
Throttle position sensor (2nd
channel)1. Suspends lean burn operation.
2. Controls the throttle opening angle feedback (half as much as the opening
rate in the normal condition) by using signals from the throttle position sensor
(1st channel). However, this controlling system is not applied if the throttle
position sensor (1st channel) and throttle position sensor (2nd channel)
combination output voltage is outside 4 - 6 V.
3. Refrains from controlling the throttle opening angle feedback if the throttle
position sensor (1st channel) is also defective.
Engine coolant temperature
sensorControls as if the engine coolant temperature is 80_
C. (Moreover, the control system
is working until the ignition switch is turned OFF if the sensor signal returns to normal.)
Camshaft position sensorCuts the fuel supply once a malfunction is detected. (Only when there has been
no occasion of detecting No.1 cylinder top dead centre after the ignition switch
is turned ON.)
Vehicle speed sensor1. Suspends lean burn operation. However, the control is cancelled as a certain
time passes by with the engine speed of 1,500 r/min or more.
2. Suspends lean burn operation during the engine idling.
Barometric pressure sensorControls as if the barometric pressure is 101 kPa.
Detonation sensorFixes the ignition timing as that for standard petrol.
Injector1. Suspends lean burn operation.
2. Suspends the exhaust gas recirculation.
Ignition coil (incorporating pow-
er transistor)1. Suspends lean burn operation.
2. Cuts off the fuel supply to cylinders with an abnormal ignition signal.
Fuel pressure sensor1. Controls as if the fuel pressure is 5MPa.
2
. Suspends fuel injection. (when the low pressure is detected and the engine
speed is more than 3,000r/min)
Alternator FR terminalRefrains from controlling to suppress the alternator output to electrical load.
(Operated as a normal alternator)
Accelerator pedal position sen-
sor (2nd channel)1. Suspends lean burn operation.
2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (1st channel). (However, the control system is not applicable
if the difference from the accelerator pedal position sensor (1st channel) output
voltage is 1.0 V or higher.)
3
. Suspends the electronic controlled throttle valve system if accelerator pedal
position sensor (1st channel) is also defective.
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Page 228 of 1839
GDI -Troubleshooting
Malfunctioning item Control contents during malfunction
Accelerator pedal position sen-
sor (1st channel)1. Suspends lean burn operation.
2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (2nd channel). (However, this control is not applicable if the
voltage difference between the accelerator pedal position sensor (1st channel)
and accelerator pedal position sensor (2nd channel) is 1.0 V or higher.)
3. Also suspends the electronic-controlled throttle valve system when the
accelerator pedal position sensor (2nd channel) is defective.
Throttle position sensor (1st
channel)1. Suspends lean burn operation.
2.Controls throttle opening angle feedback by using signals from throttle position
sensor (2nd channel). (However, the controlling system is not applied when
the throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 - 6 V.)
3.Refrains from controlling the throttle opening angle feedback when throttle
position sensor (2nd channel) is also defective.
Electronic-controlled throttle
valve system1. Suspends the electronic controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the idle speed feedback control.
Throttle valve position feed-
back1. Suspends the electronic controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
However, if the throttle valve opening angle is significantly wide, this system carries
out the following controls.
1. Always cuts the fuel supply to three cylinders.
2. Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.
Throttle control servo1. Suspends the electronic-controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
Communication line between
the throttle valve controller and
the ECU1. Communication error between the throttle valve controller and the engine-ECU:
DSuspends lean burn operation.
DCuts the fuel supply when the engine speed reaches 3,000 r/min or
more.
DSuspends the cruise-control.
2. Communication error between the throttle valve controller and the engine-ECU:
DSuspends lean burn operation.
DCuts the fuel supply when the engine speed reaches 3,000 r/min or
more.
DSuspends the cruise-control.
DThe throttle valve controller controls the throttle valve opening angle by
using signals from accelerator pedal position sensor (2nd channel).
Throttle valve controller1. Suspends the electronic-controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
NOTE
If the electronic-controlled throttle valve system is suspended, the engine warning lamp will illuminate.
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Page 229 of 1839
GDI -Troubleshooting
INSPECTION CHART FOR DIAGNOSIS CODES
Code No.Diagnosis itemReference page
P0100Air flow sensor system13A-17
P0105Barometric pressure sensor system13A-19
P0110Intake air temperature sensor system13A-21
P0115Engine coolant temperature sensor system13A-22
P0120LThrottle position sensor (1st channel) system13A-25
P0125Feedback system13A-27
P0130Oxygen sensor (front) system
P0135Oxygen sensor heater (front) system
P0136Oxygen sensor (rear) system
P0141Oxygen sensor heater (rear) system
P0170Abnormal fuel system13A-34
P0190LAbnormal fuel pressure13A-36
P0201No.1 injector system13A-38
P0202No.2 injector system13A-40
P0203No.3 injector system13A-42
P0204No.4 injector system13A-44
P0205No.5 injector system13A-46
P0206No.6 injector system13A-48
P0220LAccelerator pedal position sensor (1st channel) system13A-50
P0225LThrottle position sensor (2nd channel) system13A-52
P0300LIgnition coil (power transistor) system13A-53
P0301No.1 cylinder misfire detected.13A-55
P0302No.2 cylinder misfire detected.13A-55
P0303No.3 cylinder misfire detected.13A-55
P0304No.4 cylinder misfire detected.13A-55
P0305No.5 cylinder misfire detected.13A-55
P0306No.6 cylinder misfire detected.13A-55
P0325Detonation sensor system13A-56
P0335Crank angle sensor system13A-56
P0340Camshaft position sensor system13A-58
P0403EGR valve system13A-60
P0420Catalyst malfunction13A-61
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GDI -Troubleshooting
Code No.Reference page Diagnosis item
P0443Purge control solenoid valve system13A-62
P0500Vehicle speed sensor system13A-63
P1200Injector driver system13A-63
P1220LElectronic-controlled throttle valve system13A-64
P1221LThrottle valve position feedback system13A-65
P1222LThrottle control servo system13A-66
P1223LCommunication line with throttle valve controller13A-67
P1225LAccelerator pedal position sensor (2nd channel) system13A-68
P1226LThrottle valve controller system13A-69
P1500Alternator FR terminal system13A-70
P1610Immobilizer system13A-71
NOTE
1. Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.
2. Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.
3. After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the
engine is started and the same malfunction is re-detected. However, for items marked with a “
L”,
the diagnosis code is recorded on the first detection of the malfunction.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
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