MITSUBISHI MONTERO 2000 Service Repair Manual

GDI -Troubleshooting <A/T>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 <A/T>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

S
pecia lp atte rn s P
atte rn heig ht L
ow P
atte rn se le cto r D
is p la y E
ngin e r/m in I
d le sp eed

S
pecia lp atte rn s P
atte rn heig ht L
ow P
atte rn se le cto r D
is p la y E
ngin e r/m in I
d le sp eed

T
w o engin e re vo lu tio ns (O ne ca m sh aft re vo lu tio n)
7 5 _B TD C
5_B TD C T
No.5 TD C N
o.6 TD C
W ave Patte rn Observ atio n Poin ts
C heck th at cycle tim e T beco m es sh orte r when th e engin e sp eed in cre ase s.
E xam ple s of Abnorm al W ave Patte rn s
D Exa m ple 1
C au se of pro ble m
S enso r in te rfa ce malf u nctio n
W ave patte rn ch ara cte ris tic s
R ecta ngula r w ave patte rn is outp ute ve n when th e engin e
i s not sta rte d.
D Exa m ple 2
C au se of pro ble m
L oose tim in g belt
A bnorm alit y in se nso r dis k
W ave patte rn ch ara cte ris tic s
W ave patte rn is dis p la ce d to th e le ft or rig ht.

S
pecia lp atte rn P
atte rn heig ht L
ow P
atte rn se le cto r D
is p la y E
ngin e r/m in I
d le sp eed (
V ) I
n je cto r
o pen cir c u it
c h eck sig nal I
n je cto r
d riv e sig nal (
m s)
W ave Patte rn Observ atio n Poin ts
D Check th at th e in je cto r driv e tim e is id entic a l to th e tim e
d is p la ye d on th e MUT-I I.
D Check th at th e in je cto r sig nals beco m e gre atly exte nded
b ut so on re tu rn to th eir norm al wave le ngth when th e
e ngin e is su ddenly ra ce d.
D Check th at th e in je cto r open cir c u it ch eck sig nal is
s yn ch ro niz e d wit h each ris in g portio n of th e in je cto r driv e
s ig nal. N
orm alw ave
p atte rn

S
pecia lp atte rn s P
atte rn heig ht L
ow P
atte rn se le cto r D
is p la y E
ngin e r/m in A
ppro x. 1 ,2 0 0 r/m in C
ra nk angle se nso r
o utp utw ave patte rn P
ow er tr a nsis to r
c o ntr o lsig nalw ave
p atte rn
OFF
ON
P
oin t w ave built - u p se ctio n
D ow eld iv is io n (
m s)
T
: R evo lt io n tim eco rre sp ondin g
t o a cra nk angle of1 20
4
0
0 (
V )
2 4
6
2
6
qq
:S
park adve nce angle C
om pre ssio n to p dead ce ntr e S
pecia l
p atte rn s
p ic ku p A
naly ze r
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

P
ro bable ca use R
is e s fr o m appro x. 2V to appro x. 4.5 V at th e to p-rig ht N
orm al 2
V re cta ngula r w ave O
pen-c ir c u it in ig nit io n prim ary cir c u it R
ecta ngula r w ave at pow er vo lt a ge P
ow er tr a nsis to r m alf u nctio n V
B
-
-- N orm alw ave patte rn
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k