Mitsubishi Montero (2004+). Manual — part 858

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSMISSION

23A-7

ADAPTIVE SHIFT CONTROL

1. The computer learns the driving habits and pref-

erences of each individual driver by processing
driving data on engine output, tire load, foot brake
operation, etc. It then uses this data to adjust shift
timing to best suit the driver's style.

2. If the computer determines from the driving pat-

terns that the driver is one who enjoys a relaxed,
unhurried style, it adjusts timing to execute
up-shifts at a lower engine speed to provide a
smooth, quiet ride. On the other hand, if the com-
puter determines the driver to prefer a sporty ride,
it adjusts timing to shift up at a higher engine
speed to provide more powerful response.

3. If the computer determines that the driver tends

to apply the brakes often on a descending road-
way, it adjusts timing to down shift sooner so that
engine braking is more effectively applied. Con-
versely, if the computer determines that the driver
does not brake much while driving downhill, it
delays downshifting to minimize the effect of
engine braking.

.

AC000844

DRIVER WHO PREFERS
RELAXING RIDE

DRIVER WHO PREFERS
SPORTIER RIDE

50 (31)

4TH

3RD

100 (62)

VEHICLE SPEED [km/h (mph)]

ADAPTIVE SHIFT CONTROL DURING ACCELERATION

AB

4TH

3RD

AC000845

DRIVER WHO PRESSES
BRAKE PEDAL OFTEN

AVERAGE DRIVER

4TH

3RD

ADAPTIVE SHIFT CONTROL ON DOWNGRADES

AB

4TH

3RD

4TH

4TH

4TH

4TH

3RD

2ND

DRIVER WHO RARELY
PRESSES THE BRAKE

CONVENTIONAL A/T (NO DOWN SHIFT)

NEW A/T WITH
INVECS-II

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSMISSION

23A-8

SYSTEM CONSTRUCTION DIAGRAM

Ignition switch

Input shaft speed sensor

Output shaft speed sensor

Crankshaft position sensor

Accelrator pedal position sensor

Transmission fluid temperature sensor

Transmission range switch

Vehicle speed sensor

Stoplight switch

Select switch

Scan tool (MUT-II)

Serial communication

A/T control relay

Torque converter clutch solenoid valve

Low-reverse solenoid valve

Second solenoid valve

Underdrive solenoid valve

Overdrive solenoid valve

SENSE

DECIDE

ACT

AC204099

Shift switch (up, down)

Cruise control unit (OD OFF signal)

Dual pressure switch

4LLc detection switch

Reduction solenoid valve

Transmission fluid temperature warning
(''A/T TEMP'' indicator light flashing)

Fail-safe operation

Diagnostic trouble code output

Powertrain control module (PCM)

AC

Scan tool (MUT-III)

Transmission fluid temperature warning
(''A/T TEMP'' indicator light illuminating)

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSMISSION

23A-9

SHIFT PATTERN CONTROL

.

UPSHIFT PATTERN

NOTE: Within 2 -to- 3 and 3 -to- 4 movement ranges, the PCM adjusts shift points according to the driving
conditions by memorizing the accelerator pedal stroke and braking timing.

.

DOWNSHIFT PATTERN

AC204396 AB

100

50

0

0 (0)

50 (31)

100 (62)

150 (93)

VEHICLE SPEED [km/h (mph)]

1,000

2,000

3,000

4,000

5,000

6,000

7,000

OUTPUT SHAFT SPEED (r/min)

THICK LINE: STANDARD SHIFT PATTERN

2

→ 3

MOVEMENT
RANGE

3

→4

MOVEMENT
RANGE

1

2

2

3

3

4

THROTTLE
OPENING (%)

THROTTLE
OPENING
VOLTAGE (V)

4.5

4.0

3.0

2.0

1.0

0.5

200 (124)

4

5

4

→5

MOVEMENT
RANGE

AC204397

100

50

0

VEHICLE SPEED [km/h (mph)]

1,000

2,000

3,000

4,000

5,000

6,000

7,000

OUTPUT SHAFT SPEED (r/min)

AB

1

2

2

3

THROTTLE
OPENING (%)

THROTTLE
OPENING
VOLTAGE (V)

4.5

4.0

3.0

2.0

1.0

0.5

3

4

3

4

2

3

1

2

0 (0)

50 (31)

100 (62)

150 (93)

200 (124)

4

5

(SPORT MODE)

(SPORT MODE)

(SPORT MODE)

4

5

(SPORT MODE)

GENERAL DESCRIPTION

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AUTOMATIC TRANSMISSION

23A-10

TORQE CONVERTER CLUTCH CONTROL

.

.

3RD GEAR RANGE <4A5A>

AC306494

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

AC306572

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

200 (124)

DECELERATION
LOCK-UP ZONE