Mitsubishi Montero (2004+). Manual — part 991
ON-VEHICLE SERVICE
TSB Revision
AUTOMATIC TRANSMISSION
23A-539
ACX01224AE
VEHICLE SPEED SENSOR
I
ACX01228
REAR PROPELLER
SHAFT SPEED SENSOR
AF
J
L
ACX02223 AC
2WD DETECTION
SWITCH
2WD/4WD
DETECTION
SWITCH
4H DETECTION
SWITCH
CENTER DIFFERENTIAL
LOCK DETECTION SWITCH
4LLc DETECTION
SWITCH
K
ACX01223 AF
OUTPUT SHAFT
SPEED SENSOR
L
ACX01233
REDUCTION
SOLENOID
VALVE
SECOND
SOLENOID
VALVE
UNDERDRIVE
SOLENOID VALVE
OVER DRIVE
SOLENOID VALVE
TORQUE CONVERTER
CLUTCH SOLENOID
VALVE
LOW-REVERSE
SOLENOID
VALVE
AE
M
ACX01230 AG
TRANSMISSION
FLUID
TEMPERATURE
SENSOR
M
AC203901AC
N
ASC-ECU
ACX01473AD
A/T CONTROL
RELAY
O
ON-VEHICLE SERVICE
TSB Revision
AUTOMATIC TRANSMISSION
23A-540
AC203898
POWERTRAIN
CONTROL
MODULE (PCM)
AC
P
ACX02211
Q
AB
TRANSFER SHIFT
LEVER SWITCH
ACX01475 AC
R
TRANSFER-ECU
ACX02211
S
AF
SELECT SWITCH AND
SHIFT SWITCH (UP AND
DOWN)
ACX00213
DATA LINK
CONNECTOR
AJ
T
AC203914
AC
U
ACCELERATOR PEDAL
POSITION SENSOR
STEERING
SHAFT
ACX02208AF
STOPLIGHT
SWITCH
BRAKE PEDAL
V
ON-VEHICLE SERVICE
TSB Revision
AUTOMATIC TRANSMISSION
23A-541
ESSENTIAL SERVICE
TRANSMISSION FLUID CHECK
M1231103700018
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
1. Drive the vehicle until the transmission fluid temperature
rises to the normal temperature [70
− 80°C (158 − 176°F)].
NOTE: The transmission fluid temperature is measured with
scan tool MB991958.
NOTE: If it takes some amount of time until the transmission
fluid reaches its normal operating temperature [70
−
80
°
C
(158
−
176
°
F)], check the transmission fluid level by refer-
ring to the left diagram.
2. Park the vehicle on a level surface.
3. Move the selector lever through all positions to fill the torque
converter and the hydraulic circuits with fluid, and then move
the selector lever to the "N" position.
4. After wiping off any dirt around the dipstick, remove the
dipstick and check the condition of the transmission fluid.
NOTE: If the transmission fluid smells as if it is burnt, it
means that the transmission fluid has been contaminated by
fine particles from the bushings and friction materials. A
transmission overhaul and cooler line flushing may be nec-
essary.
5. Check that the transmission fluid level is at the "HOT" mark
on the dipstick. If the transmission fluid level is less than
this, add DIAMOND ATF SP III transmission fluid until the
level reaches the "HOT" mark.
NOTE: If the transmission fluid level is too low, the oil pump
will draw in air along with the transmission fluid, which will
cause bubbles to form. If the transmission fluid level is too
high, rotating components inside the transmission will churn
the fluid and air into a foamy liquid. Both conditions (level
too low or too high) will cause the hydraulic pressure to
drop, which will result in late shifting and slipping of the
clutches and brakes.
In either case, air bubbles can interfere with normal valve,
clutch, and brake operation. Also, foaming can cause trans-
mission fluid to escape from the transmission vents where it
may be mistaken for a leak.
6. Securely insert the dipstick.
NOTE: The transmission fluid should always be replaced
under the following conditions:
.
•
When troubleshooting the transmission
•
When overhauling the transmission
AC100600
HOT
AB
FLUID LEVEL [mm (in)]
10 (0.4)
0 (0)
–10 (–0.4)
–20 (–0.8)
20 (0.8)
–30 (–1.2)
–40 (–1.6)
40
(104)
60
(140)
80
(176)
FLUID TEMPERATURE [˚C (˚F)]
DIPSTICK
AC000846AC
ON-VEHICLE SERVICE
TSB Revision
AUTOMATIC TRANSMISSION
23A-542
•
When the transmission fluid is noticeably dirty or burnt
(driving under severe conditions)
TRANSMISSION FLUID CHANGE
M1231104100019
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
If you have an transmission fluid changer, use it to replace the
transmission fluid. If you do not have an transmission fluid
changer, replace the transmission fluid by the following proce-
dure.
1. Disconnect the hose shown in the illustration which
connects the transmission and the oil cooler (inside the
radiator). Place a container under the hose to collect the
discharge.
CAUTION
The engine should be stopped within one minute after it is
started. If all the transmission fluid has drained out before
then, the engine should be stopped at that point.
2. Start the engine and let the transmission fluid drain out.
(Running conditions: "N" range with engine idling)
Discharge volume: Approximately 4.0 dm
3
(4.2 quarts)
3. Remove the drain plug from the bottom of the transmission
case to drain the transmission fluid.
Discharge volume: Approximately 2.0 dm
3
(2.1 quarts)
4. Install the drain plug with a new gasket, and tighten it to the
specified torque.
Tightening torque: 39
± 5 N⋅m (29 ± 3 ft-lb)
CAUTION
Stop pouring if the full volume of transmission fluid can
not be added.
5. Add new transmission fluid (DIAMOND ATF SP III) through
the oil filter tube.
Adding volume: Approximately 6.0 dm
3
(6.3 quarts)
6. Repeat the procedure in Step 2. (to pump out the rest of the
contaminated transmission fluid)
7. Add new transmission fluid (DIAMOND ATF SP III) through
the oil filler tube.
Adding volume: Approximately 4.0 dm
3
(4.2 quarts)
NOTE: Check for contamination or a burnt odor. If the trans-
mission fluid is still contaminated or burnt, repeat Steps 6
and 7 before proceeding to Step 8.
ACX01184
AB
ACX01185AB
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