2000 MITSUBISHI MONTERO Service Repair Manual

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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C
heck it e m C
heck co ndit io n (E ngin e co ndit io n) N
orm alco ndit io n 1 N
o.1 in je cto r W
hile engin e is id lin g afte r havin g warm ed up, F
ro m 9-13 V, m om en- 9 N
o.2 in je cto r s
u ddenly depre ss th e acce le ra to r pedal. t
a rily dro ps slig htly 2
4 N
o.3 in je cto r 2 N
o.4 in je cto r 1
0 N
o.5 in je cto r 2
5 N
o.6 in je cto r 3 O
xyg en se nso r heate r E
ngin e: Id lin g 0
-3 V E
ngin e: 5,0 00 r/m in S
yste m vo lt a ge 6 I
n je cto r driv e r re la y I
g nit io n sw it c h : O FF 0
-0.1 V I
g nit io n sw it c h : O N 0
.5 -1.0 V 8 A
lt e rn ato r G te rm in al T
he vo lt a ge in cre ase s
b y 0.2 -3.5 V 5
4 A
lt e rn ato r FR te rm in al T
he vo lt a ge dro ps 1
1 N
o.1 ig nit io n co il E
ngin e sp eed: 3,0 00 r/m in 0
.3 -3.0 V 3
1 N
o.2 ig nit io n co il 1
3 N
o.3 ig nit io n co il 3
0 N
o.4 ig nit io n co il 1
2 N
o.5 ig nit io n co il 3
2 N
o.6 ig nit io n co il 1
4 T
hro ttle co ntr o l se rv o I
g nit io n sw it c h : O FF 0
-0.1 V r
e la y I
g nit io n sw it c h : O N 0
.5 -1.0 V

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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C
heck it e m S
ta ndard va lu e, norm alco ndit io n (c h eck co ndit io ns) 3
-4 1 O
xyg en se nso r heate r 4
.5 -8.0 W (a t 20_C ) 3
4 -4 1 P
urg e co ntr o lso le noid va lv e 2
8 -36 W (a t 20_C ) 4
2 -b ody earth E
arth C
ontin uit y (0 W) 4
8 -b ody earth 5
1 -4 1 E
G R va lv e (A ) 1
5 -20 W (a t 20_C ) 5
3 -4 1 E
G R va lv e (C ) 6
0 -4 1 E
G R va lv e (B ) 6
2 -4 1 E
G R va lv e (D ) 4
4 -8 1 E
ngin e co ola nt te m pera tu re se nso r 5
.1 -6.5 kW (W hen co ola nt te m pera tu re is 0_C ) 2
.1 -2.7 kW (W hen co ola nt te m pera tu re is 20_C ) 0
.9 -1.3 kW (W hen co ola nt te m pera tu re is 40_C ) 0
.2 6 -0.3 6 kW (W hen co ola nt te m pera tu re is 80_C ) 6
4 -8 1 I
n ta ke air te m pera tu re se nso r 5
.3 -6.7 kW (W hen in ta ke air te m pera tu re is 0_C ) 2
.3 -3.0 kW (W hen in ta ke air te m pera tu re is 20_C ) 1
.0 -1.5 kW (W hen in ta ke air te m pera tu re is 40_C ) 0
.3 0 -0.4 2 kW (W hen in ta ke air te m pera tu re is 80_C ) 7
9 -8 1 A
cce le ra to r pedalp osit io n sw it c h C
ontin uit y (w hen th e acce le ra to r pedalis re le ase d) N
o co ntin uit y (w hen th e acce le ra to r pedal is
d epre sse d slig htly )

C
heck it e m C
heck co ndit io n (E ngin e co ndit io n) N
orm alco ndit io n 1 T
hro ttle co ntr o lse rv o (U ) C
hanges 1
4 T
hro ttle co ntr o lse rv o (V ) 1
5 T
hro ttle co ntr o lse rv o (W ) 2 T
hro ttle co ntr o l se rv o pow er
s u pply I
g nit io n sw it c h : O N S
yste m vo lt a ge 5 P
ow er su pply I
g nit io n sw it c h : O N S
yste m vo lt a ge 6 S
enso r applie d vo lt a ge I
g nit io n sw it c h : O N 4
.5 -5.5 V 7 T
hro ttle posit io n se nso r (1 st
c h annel) I
g nit io n sw it c h : O N R
ele ase th e acce l-
e ra to r pedal. 0
.4 -0.8 V D
epre ss th e acce l-
e ra to r pedalfu lly . 4
.2 -4.8 V 1
8 B
acku p pow er su pply I
g nit io n sw it c h : O FF S
yste m vo lt a ge 2
0 A
cce le ra to r pedal posit io n
s e nso r (2 nd ch annel) I
g nit io n sw it c h : O N R
ele ase th e acce l-
e ra to r pedal. 0
.9 85 -1.0 85 V D
epre ss th e acce l-
e ra to r pedalfu lly . 4
.0 V or hig her 2
2 I
g nit io n sw it c h -IG I
g nit io n sw it c h : O N S
yste m vo lt a ge