Mitsubishi Montero (2004+). Manual — part 867
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-43
Malfunction when shifting
Shift shocks and slipping
9
Does not shift properly
Early or late shifting in all gears
10
Early or late shifting in some gears
11
Does not shift
No diagnostic trouble codes
12
Malfunction while driving
Poor acceleration
13
Vibration
14
Vehicle shifts differently with A/C engaged
15
Transmission won't downshift under load with auto-cruise engaged
16
Shift switch assembly system
17
4LLc detection switch assembly system
18
SYMPTOM
INSPECTION
PROCEDURE
NO.
REFERENCE
PAGE
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-44
DIAGNOSTIC TROUBLE CODE PROCEDURES <A/T>
DTC 15 (P0713): Transmission Fluid Temperature Sensor System (Open Circuit)
AC205187AC
Transmission Fluid Temperature Sensor System Circuit
AC204395
CONNECTOR : C-03
AE
C-03 (B)
6
10
4
9
5
3
8
2
7
1
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-45
.
CIRCUIT OPERATION
• The PCM (terminal 119) applies 5 volts to the
transmission fluid temperature sensor output ter-
minal (terminal 1).
• The transmission fluid temperature sensor circuit
is grounded to the PCM (terminal 96).
• When the transmission fluid temperature is cold,
the transmission fluid temperature sensor resis-
tance is high. When the transmission fluid tem-
perature is hot, the transmission fluid
temperature sensor resistance is low.
.
DESCRIPTIONS OF MONITOR METHODS
If transmission fluid temperature is below specified
value even after driving test for more than specified
period, PCM judges that transmission fluid tempera-
ture sensor has a failure.
.
MONITOR EXECUTION
Continuous
.
MONITOR EXECUTION CONDITIONS (OTHER
MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• DTC 23 (P0720): Output shaft speed sensor mal-
function
Sensor (The sensor below is determined to be
normal)
• Output shaft speed sensor
.
AC204681AB
CONNECTOR: D-135
D-135 (GR)
91 92
93
101
94 95
96 97 98 99 100
102103
104
105106
107108 109
110 111112
113114
115116 117
118 119120
AC204176
CONNECTOR : E-114
BD
38
28
16
33
22
10
31
19
7
1
18
30
29
17
5
6
21
20
32
8
2
9
25
13
3
24
23
3435
1112
27
26
3637
14
4
15
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-46
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Check Conditions
• Engine speed: 1,000 r/min or more.
• Output speed: 1,000 r/min or more.
• Accumulated time in above condition: 10 min-
utes.
Judgement Criteria
• Transmission fluid temperature sensor voltage:
4.5 volts or more. (1 second)
.
OBD-II DRIVE CYCLE PATTERN
Start the engine, drive at 60 km/h (37 mph) or more
for 15 minutes in total.
Good
Malfunction
Timer start
N
E
:
Engine speed
N
OPG-B
: Output speed (output
shaft speed sensor)
Timer hold
Timer accumulate
START
N
E
> 1,000 r/min and
N
OPG-B
> 1,000 r/min
Continuous failure
for 1 sec.
Transmission fluid
temperature sensor
voltage > 4.5 V
Timer > 10 min.
END
N
E
> 1,000 r/min and
N
OPG-B
> 1,000 r/min
AC205204
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
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