Mitsubishi Montero (2002-2004). Manual — part 854

GENERAL DESCRIPTION

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AUTOMATIC TRANSMISSION

23Aa-7

3. If the computer determines that the driver tends

to apply the brakes often on a descending road-
way, it adjusts timing to downshift 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 breaking.

.

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

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AUTOMATIC TRANSMISSION

23Aa-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)

AB

GENERAL DESCRIPTION

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AUTOMATIC TRANSMISSION

23Aa-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)

SPECIAL TOOLS

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AUTOMATIC TRANSMISSION

23Aa-10

SPECIAL TOOLS

M1231100600142

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MD998330 (Includes
MD998331)
Oil pressure gauge
(3.0 MPa, 427 psi)

MD998330-01

Measurement of hydraulic
pressure

MD998332
Adapter

MD998332-01

Connection for oil pressure
gauge

MD998478
Test harness (3 pin,
triangle)

MD998478-01

Inspection using an
oscilloscope

MB991502
Scan tool (MUT-II)

MB991496-OD

Checking diagnostic trouble
codes

MB991658
Test harness set

Tool not available

Inspection of throttle position
sensor

MB991709
Test harness set

Tool not available

Inspection using an
oscilloscope

MD998900
Adapter

MD998900-01

Connection for oil pressure
gauge

B991502

MB991658