MITSUBISHI MONTERO 2000 Service Repair Manual

AUTOMATIC TRANSMISSION -Troubleshooting 23-60
Inspection procedure 20
4LLc switch system
Probable cause
The cause is probably a malfunction of the 4LLc switch circuit, or of the
engine-A/T-ECU or A/T-ECU.DMalfunction of 4LLc switch
DMalfunction of harness or connector
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
4LLc switch check (Refer to P.23-99.)NG
4LLc switch connector C-06 voltage check
DDisconnect the connector and measure at the
harness side.
DIgnition switch: ON
DVoltage between terminal 1 and earth
OKFSystem voltageCheck the following connectors:<6G7> C-06,
E-113, D-122, <4M4>C-06, E-113, D-107NG
Repair OK
Check the trouble symptoms.Replace
OKReplace the engine-A/T-ECU or A/T-ECU. NG
DCheck the harness between 4LLc switch and
the engine-A/T-ECU, and repair if necessary.
<6G7>
DCheck the harness between 4LLc switch and
the A/T-ECU, and repair if necessary.<4M4>
Check the following connector:C-06
NG
Repair
OK
NGOK


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AUTOMATIC TRANSMISSION -Troubleshooting 23-61
DATA LIST REFERENCE TABLE
Data
list No.Check itemInspection conditionsNormal condition
11APSIgnition switch: ON
Engine: StoppedAccelerator pedal:
Fully closed985 - 1085 mV
Engine: Stopped
Selector lever posi-
tion: P
Accelerator pedal:
DepressedGradually increases from the above
value.
Accelerator pedal:
Fully open4000 mV or higher
15A/T fluid tempera-
ture sensorDriving after en-
gine has warmed
upDrive for 15 minutes
or more until the ATF
temperature reaches
70 - 80°C.Gradually increases to 70 - 80°C.
21Crank angle sen-
sor <6G7>Engine: Idling
Selector lever posi-Compare the engine
speeds displayed onIdentical
sor <6G7>
Engine speed sen-
sor <4M4>Selector lever posi-
tion: Pspeeds displayed on
the tachometer and
the MUT-II.
22Input shaft speed
sensorShift range: 4thDriving at a constant
speed of 50 km/h in
4th1300 - 1600 r/min
23Output shaft speed
sensorShift range: 4thDriving at a constant
speed of 50 km/h in
4th1300 - 1600 r/min
25Wide open throttleAccelerator pedalReleasedOFF
switchpositionDepressedON
26Stop lamp switchIgnition switch: ON
Engine: StoppedBrake pedal: De-
pressedON
Engine: Stopped
Brake pedal: Re-
leasedOFF
29Vehicle speed sen-
sorSelector lever posi-
tion: Sports modeIdling in 1st
(Vehicle stopped)0 km/h
Driving at a constant
speed of 50 km/h in
3rd50 km/h
31LR solenoid valve
duty ratioSelector lever posi-
tion: Sports modeData List No.No. 31No. 32No. 33No. 34No.35
32UD solenoid valve
duty ratioDriving at a constant
speed in 1st0%0%100%100%0%
332nd solenoid valve
duty ratioDriving at a constant
speed in 2nd100%0%0%100%0%
34OD solenoid valve
duty ratioDriving at a constant
speed in 3rd100%0%100%0%0%
35RED solenoid
valve duty ratioDriving at a constant
speed in 4th0%0%100%0%100%
Driving at a constant
speed in 5th100%100%0%0%100%


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AUTOMATIC TRANSMISSION -Troubleshooting 23-62
Data
list No.Normal condition Inspection conditions Check item
36DCC solenoid
valve duty ratioShift range: 2ndDriving at 30 km/h in
2 range, then fully
close accelerator.70% - 90% -to- 0%
Driving at 50 km/h in
4th70% - 90%
52Damper clutch slip
amountShift range: 2ndDriving at 30 km/h in
2 range, then fully
close accelerator.- 300 - 100 r/min or 100 - 300 r/min
Driving at a constant
speed of 50 km/h in
4th- 10 - 10 r/min
54Control relay out-
put voltageIgnition switch:
OFFIgnition switch: ON10 - 12 V
61Inhibitor switchIgnition switch: ON
Engine: StoppedSelector lever posi-
tion: PP
Engine: Stopped
Selector lever posi-
tion: RR
Selector lever posi-
tion: NN
Selector lever posi-
tion: DD
63Shift positionSelector lever posi-
tion:
Sports modeDriving at a constant
speed of 10 km/h in
1st1st
Driving 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
65Dual pressureEngine: IdlingA/C switch: ONON
switchA/C switch: OFFOFF
66OD-OFFsignal
control is operatingWhile driving on a
level roadOFF
auto-cruise control
system>While climbing an
inclineON


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AUTOMATIC TRANSMISSION -Troubleshooting 23-63
Data
list No.Normal condition Inspection conditions Check item
67Select switchIgnition switch: ON
Engine: Stopped(Data List No. )No.
67No.
68No. 69
Engine: Stopped
Selector lever posi-
tion: DOFFOFFOFF
68Upshift switchSelector lever opera-
tion: Sports mode
selectedONOFFOFF
69Downshift switchSelector lever opera-
tion: Lever moved to
upshift position and
heldONONOFF
Selector lever opera-
tion: Lever moved to
downshift position
and heldONOFFON
73Target effective en-
gine pressure
<6G7>Engine: Idling
Selector lever posi-
tion: NAccelerator pedal:
fully closed to de-
pressedData changes.
754LLc switchIgnition switch: ON
Engine: StoppedTransfer lever posi-
tion: 4LLcON
Transfer lever posi-
tion:
Other than the aboveOFF
76Theoretical effec-
tive engine pres-
sure
<4M4>Engine: Idling
Selector lever posi-
tion: NAccelerator pedal:
fully closed to de-
pressedData changes.
ACTUATOR TEST TABLE
Item No.Check itemTest contentsInspection conditionsNormal condition
1LR solenoid valveThe solenoid valveIgnition switch: ONThe sound of opera-
2UD solenoid valvespecified by the MUT-Selector lever posi-tion should be heard
32nd solenoid valve
IIis driven at 50%
duty for 5 seconds. Notion: P
Engine: Stoppedwhen the solenoid
valve is driven.
4OD solenoid valveother solenoid valvesEngine: Stopped
Throttle (accelerator)
5RED solenoid valve
are energised.Opening angle volt-
6DCC solenoid valveage: Less than 1 V
<6G7>,
71st shift indicator lampThe indicator lamp for
<6G7>,
less than 1.2 V <4M4>
The shift indicator
82nd shift indicator lampthe shift stage speci-The fail-safe function
should not be operat-lamp illuminates.
93rd shift indicator lamp
fied by the MUT-II
illuminates for 3 sec-should not be operat-
ing.
104th shift indicator lamponds.
115th shift indicator lamp
12A/T control relayThe A/T control relay
turns off for 3 sec-
onds.Data List No. 54
(1) During test: 0 V
(2) Normal: System voltage
(V)


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I
te m C
onte nts N
O TE 1
4 I
N VEC S-I I U
se th is pro ce dure when ca rry -
i n g out ro ad te st pro ce dure 7.
T his fu nctio n ca nce ls th e sto p-
p in g of IN VEC S-I I co ntr o l w hen
t h e ig nit io n sw it c h is tu rn ed OFF
a nd th en back O N. C
heck it e m I
n sp ectio n co ndit io ns S
ta ndard va lu e 5
0 A
/T co ntr o lre la y I
g nit io n sw it c h : O FF 0
V I
g nit io n sw it c h : O N 1
0 -12 V 7
6 E
arth A
tall tim es 0
V 7
7 S
ole noid va lv e pow ers u pply I
g nit io n sw it c h : O FF 0
V I
g nit io n sw it c h : O N S
yste m vo lt a ge 8
1 S
enso r earth A
tall tim es 0
V 8
8 E
arth A
tall tim es 0
V 8
9 S
ole noid va lv e pow ers u pply I
g nit io n sw it c h : O FF 0
V I
g nit io n sw it c h : O N S
yste m vo lt a ge 9
7 E
arth A
tall tim es 0
V 1
01 I
n hib it o r sw it c h P I
g nit io n sw it c h : O N
S ele cto r le ve r posit io n: P S
yste m vo lt a ge I
g nit io n sw it c h : O N
S ele cto r le ve r posit io n: O th er th an th e above 0
V 1
02 I
n hib it o r sw it c h D I
g nit io n sw it c h : O N
S ele cto r le ve r: D S
yste m vo lt a ge I
g nit io n sw it c h : O N
S ele cto r le ve r posit io n: O th er th an th e above 0
V 1
03 I
n put sh aft sp eed se nso r M
easu re betw een te rm in als (5 7) and (1 03) usin g an
o scillo sco pe.
E ngin e: 2 000 r/m in
S hif t ra nge: 4th C
heck Pro ce dure
U sin g an Oscillo -
s co pe (R efe r to
P .2 3-6 9.) 1
04 O
utp ut sh aft sp eed se nso r M
easu re betw een te rm in als (5 7) and (1 04) usin g an
o scillo sco pe.
E ngin e: 2 000 r/m in
S hif t ra nge: 4th C
heck Pro ce dure
U sin g an Oscillo -
s co pe (R efe r to
P .2 3-6 9.) 1
05 1
st sh if t in dic a to r la m p S
hif t ra nge: 1st S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V

AUTOMATIC TRANSMISSION -Troubleshooting AUTOMATIC TRANSMISSION -Troubleshooting 23-65
Ter-
minal
No.Standard value Inspection conditions Check item
1062nd solenoid valveEngine: Idling
Shift range: 2ndSystem voltage
Engine: Idling
Shift range: Park7–9 V
107DCC solenoid valveEngine: Idling
Shift range: 1stSystem voltage
108Inhibitor switch REngine: Idling
Selector lever position: RSystem voltage
Engine: Idling
Shift range: Other than the above0V
109Select switchIgnition switch: ON
Selector lever operation: Sports modeSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
11 0Downshift switchIgnition switch: ON
Selector lever operation: Downshifted in Sports mode
and lever heldSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
11 24LLc switchIgnition switch: ON
Transfer lever position: 4LLcSystem voltage
Ignition switch: ON
Transfer lever position: Other than the above0V
11 5Wide open throttle switchAccelerator pedal: ReleasedSystem voltage
Accelerator pedal: Depressed0V
11 73rd shift indicator lampShift range: 3rdSystem voltage
Shift range: Other than the above0V
11 82nd shift indicator lampShift range: 2ndSystem voltage
Shift range: Other than the above0V
11 9RED solenoid valveEngine: Idling
Shift range: 5thSystem voltage
Engine: Idling
Shift range: Park7-9V
120UD solenoid valveEngine: Idling
Shift range: 1stSystem voltage
Engine: Idling
Shift range: Park7-9V
121Inhibitor switch NIgnition switch: ON
Selector lever position: NSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
122Upshift switchIgnition switch: ON
Selector lever operation: Upshifted in Sports mode and
lever heldSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
123Stop lamp switchIgnition switch: ON
Brake pedal DepressedSystem voltage
Ignition switch: ON
Brake pedal Released0V


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1
24 A
/T flu id te m pera tu re se nso r A
T F te m pera tu re : 20
°C 3
.8 -4.0 V A
T F te m pera tu re : 40
°C 3
.2 -3.4 V A
T F te m pera tu re : 80
°C 1
.7 -1.9 V 1
27 5
th sh if t in dic a to r la m p S
hif t ra nge: 5th S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V 1
28 4
th sh if t in dic a to r la m p S
hif t ra nge: 4th S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V 1
29 L
R so le noid va lv e E
ngin e: Id lin g
S hif t ra nge: P ark S
yste m vo lt a ge E
ngin e: Id lin g
S hif t ra nge: 2nd 7
-9 V 1
30 O
D so le noid va lv e E
ngin e: Id lin g
S hif t ra nge: 3rd S
yste m vo lt a ge E
ngin e: Id lin g
S hif t ra nge: P ark 7
-9 V C
heck it e m I
n sp ectio n co ndit io ns S
ta ndard va lu e 1 U
D so le noid va lv e E
ngin e: Id lin g
S hif t ra nge: 1st S
yste m vo lt a ge E
ngin e: Id lin g
S hif t ra nge: P ark 7
-9 V 2 S
ole noid va lv e pow er su pply I
g nit io n sw it c h : O FF 0
V I
g nit io n sw it c h : O N S
yste m vo lt a ge 3 S
ole noid va lv e pow er su pply I
g nit io n sw it c h : O FF 0
V I
g nit io n sw it c h : O N S
yste m vo lt a ge 4 1
st sh if t in dic a to r la m p S
hif t ra nge: 1st S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V 5 3
rd sh if t in dic a to r la m p S
hif t ra nge: 3rd S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V 6 5
th sh if t in dic a to r la m p S
hif t ra nge: 5th S
yste m vo lt a ge S
hif t ra nge: O th er th an th e above 0
V 9 4
LLc sw it c h T
ra nsfe r le ve r: 4 LLc S
yste m vo lt a ge T
ra nsfe r le ve r: O th er th an th e above 0
V

AUTOMATIC TRANSMISSION -Troubleshooting 23-67
Ter-
minal
No.Standard value Inspection conditions Check item
10A/C compressor load signalA/C switch: OFF0V
A/C switch: ONSystem voltage
11Power supplyIgnition switch: OFF0V
Ignition switch: ONSystem voltage
12EarthAt all times0V
13EarthAt all times0V
14OD solenoid valveEngine: Idling
Shift range: 3rdSystem voltage
Engine: Idling
Shift range: Park7-9V
15DCC solenoid valveEngine: Idling
Shift range: 1stSystem voltage
162nd solenoid valveEngine: Idling
Shift range: 2ndSystem voltage
Engine: Idling
Shift range: Park7-9V
172nd shift indicator lampShift range: 2ndSystem voltage
Shift range: Other than the above0V
184th shift indicator lampShift range: 4thSystem voltage
Shift range: Other than the above0V
24Power supplyIgnition switch: OFF0V
Ignition switch: ONSystem voltage
25EarthAt all times0V
26EarthAt all times0V
31Input shaft speed sensorMeasure between terminals (31) and (43) using an
oscilloscope.
Engine: 2 000 r/min
Shift range: 4thCheck Procedure
using an Oscillo-
scope (Refer to
P.23-69.)
32Output shaft speed sensorMeasure between terminals (32) and (43) using an
oscilloscope.
Engine: 2 000 r/min
Shift range: 4thCheck Procedure
using an Oscillo-
scope (Refer to
P.23-69.)
33Engine speed sensorEngine: Idling2.0 - 2.4 V
38Backup power supplyAt all timesSystem voltage
43Sensor earthAt all times0V
44A/T fluid temperature sensorA/T fluid temperature 20°C3.8 - 4.0 V
A/T fluid temperature 40°C3.2 - 3.4 V
A/T fluid temperature 80°C1.7 - 1.9 V
45Accelerator pedal positionAccelerator pedal: Fully closed (engine stopped)0.985 - 1.085 V
sensor (APS)Accelerator pedal: Fully open (engine stopped)4.0 V or higher
51RED solenoid valveEngine: Idling
Shift range: 5thSystem voltage
Engine: Idling
Shift range: Park7-9V
53Output communication withEngine: IdlingOther than 0 V
engine-ECUSelector lever position: D


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AUTOMATIC TRANSMISSION -Troubleshooting 23-68
Ter-
minal
No.Standard value Inspection conditions Check item
54Input communication withEngine: IdlingOther than 0 V
engine-ECUSelector lever position: D
55Inhibitor switch PIgnition switch: ON
Selector lever position: PSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
56Inhibitor switch NIgnition switch: ON
Selector lever position: NSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
57Select switchIgnition switch: ON
Selector lever operation: Sports modeSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
58Downshift switchIgnition switch: ON
Selector lever position: Downshifted in Sports mode
and lever heldSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
59Stop lamp switchIgnition switch: ON
Brake pedal DepressedSystem voltage
Ignition switch: ON
Brake pedal Released0V
62DIR solenoid valveEngine: Idling
Shift range: ParkSystem voltage
Engine: Idling
Shift range: 2nd7-9V
65Wide open throttle switchAccelerator pedal: Released4.5 - 5.5 V
Accelerator pedal: DepressedLess than 0.4 V
66Inhibitor switch RIgnition switch: ON
Selector lever position: RSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
67Inhibitor switch DIgnition switch: ON
Selector lever position: DSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
68Upshift switchIgnition switch: ON
Selector lever position: Upshifted in Sports mode and
lever heldSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
69Vehicle speed sensorWhen stopped0V
When starting to drive forward slowly.0 V and 5 V alter-
nates
71A/T control relayIgnition switch: OFF0V
Ignition switch: ON10 - 12 V
72EarthIgnition switch: ON0V


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I
n sp ectio n co ndit io ns N
orm al co ndi-
t io n
( W ave patte rn
s a m ple ) C
ra nk angle se nso r S
ele cto r le ve r posit io n: N I
d lin g (v e hic le sto pped) W
ave patte rn A I
n put sh aft sp eed se n-
s o r S
hif t ra nge: 4th D
riv in g at a co nsta nt sp eed of 50
k m /h in 4th (E ngin e:1 800 -2 100 W
ave patte rn B O
utp ut sh aft sp eed
s e nso r r
/m in ) V
ehic le sp eed se nso r L
R so le noid va lv e I
g nit io n sw it c h : O N F
orc e -d riv e th e so le noid va lv e s W
ave patte rn C U
D so le noid va lv e E
ngin e: S to pped (
a ctu ato r te st) . 2
nd so le noid va lv e S
ele cto r le ve r posit io n: P O
D so le noid va lv e T
hro ttle (a cce le ra to r) openin g
a ngle vo lt a ge: R
ED so le noid va lv e L
ess th an 1 V <6G 7> ,le ss th an 1.2 D
CC so le noid va lv e V
<4M 4>