Mitsubishi Montero (2002-2004). Manual — part 867

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-9

Engine: Idling
Transmission
range: N

Brake pedal
(Retest)
(1) Depressed
(2) Released

Data list No. 26
(1) ON
(2) OFF

Stoplight
switch

Stoplight switch
system
(

P.23Ac-83

)

A/C switch
(1) ON
(2) OFF

Data list No. 65
(1) ON
(2) OFF

Dual pressure
switch

−

Vehicle shifts
differently with
A/C engaged
(

P.23Ad-33

)

Engine: Idling
Transmission
range: N

Accelerator
pedal
(1) Fully closed
(2) Depressed

Data list No. 21
(1) Engine
tachometer and
the MUT-II show
the same engine
speed
(2) Gradually rises
from (1)

Crankshaft
position sensor

Crankshaft
position sensor
system
(

P.23Ac-27

)

Transmission
range
(1) N

→ D

(2) N

→ R

Should be no
abnormal shift
shocks
Time delay when
engaging should
be within 2
seconds

Malfunction
when starting

−

Engine stalls
when moving
selector lever
from N to D or N
to R (

P.23Ad-9

)

−

Shift shock
when shifting
from N to D and
long delay
(

P.23Ad-11

)

−

Shift shock
when shifting
from N to R and
long delay
(

P.23Ad-14

)

−

Shift shock
when shifting
from N to D, N
to R and long
delay (

P.23Ad-

)

Does not move −

Does not move
forward
(

P.23Ad-4

)

−

Does not move
backward
(

P.23Ad-6

)

−

Does not move
(forward or
backward)
(

P.23Ad-8

)

STEP CONDITION

BEFORE TEST/
OPERATION

TEST/
OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-10

Transmission
range: Sport
mode (on a flat
and straight
road.)

Transmission
range and
vehicle speed
(Each condition
should be
maintained for
10 seconds or
more.)
(1) Idling in 1st
gear (Vehicle
stopped)
(2) Driving at
constant speed
of 10 km/h (6.2
mph) in 1st gear
(3) Driving at
constant speed
of 30 km/h (19
mph) in 2nd gear
(4) Driving at
constant speed
of 50 km/h (31
mph) in 3rd gear
(5) Driving at
constant speed
of 50 km/h (31
mph) in 4th gear
(6) Driving at
constant speed
of 70 km/h (43
mph) in 5th gear

Data list No. 63
(2) 1st, (3) 2nd, (4)
3rd, (5) 4th, (6) 5th

Shift position

−

Data list No. 31
(2) 0 %, (3) 100 %,
(4) 100 %, (5) 0 %,
(6) 0%

Low-reverse
solenoid valve
duty %

Low-reverse
solenoid valve
system
(

P.23Ac-147

)

Data list No. 32
(2) 0 %, (3) 0 %,
(4) 0 %, (5) 0 %,
(6) 100%

Underdrive
solenoid valve
duty %

Underdrive
solenoid valve
system
(

P.23Ac-160

)

Data list No. 33
(2) 100 %, (3) 0 %,
(4) 100 %, (5) 100
%, (6) 0 %

Second
solenoid valve
duty %

Second
solenoid valve
system
(

P.23Ac-171

)

Data list No. 34
(2) 100 %, (3) 100
%, (4) 0 %, (5) 0
%, (5) 0 %

Overdrive
solenoid valve
duty %

Overdrive
solenoid valve
system
(

P.23Ac-181

)

Data list No. 35
(2) 0 %, (3) 0 %,
(4) 0 %, (5) 100 %,
(6) 100%

Reduction
solenoid valve
duty %

Reduction
solenoid valve
system
(

P.23Ac-193

)

Data list No. 29
(1) 0 km/h (0 mph)
(5) 50 km/h (31
mph)

Vehicle speed
sensor

Vehicle speed
sensor system
(

P.23Ac-140

)

Data list No. 22
(5) 1,400

− 1,700 r/

min

Input shaft
speed sensor

Input shaft
speed sensor
system
(

P.23Ac-47

)

Data list No. 23
(5) 1,400

− 1,700 r/

min

Output shaft
speed sensor

Output shaft
speed sensor
system
(

P.23Ac-65

)

STEP CONDITION

BEFORE TEST/
OPERATION

TEST/
OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-11

Transmission
range: Sport
mode (on a flat
and straight
road.)

Transmission
range and
vehicle speed
(1) Driving at
speed of 80 km/h
(50 mph) in 4th
gear
(2) Driving at
constant speed
of 80 km/h (50
mph)
(3) Release
accelerator pedal
(Speed under 50
km/h (31 mph))

Data list No. 36
(2) 70

− 90 %

(3) 70

− 90 % → 0

Torque
converter
clutch solenoid
valve duty %

36, 52,
53

Torque
converter clutch
solenoid system
(

P.23Ac-204

P.23Ac-228

P.23Ac-232

)

Data list No. 52
(2)

−10 to 10 r/min

(3) The value
changes from (2)

Torque
converter
clutch amount
of slippage

Use scan tool
MB991502 to
stop the
INVECS-II
function.
Transmission
range: D (on a
flat and straight
road.)

(1) Accelerate to
5th gear at a
throttle opening
voltage of 1.5V
(accelerator
opening angle of
30 %).
(2) Slowly
decelerate to a
stop.
(3) Accelerate to
5th gear at a
throttle opening
voltage of 2.5 V
(accelerator
opening angle of
50%).

Data list No.11, 23
The shifting points
correspond with
the scan tool
display and the
throttle opening
voltage (opening
angle) and output
shaft speed, which
are shown in the
standard shift
pattern.

Malfunction
when shifting

−

Shift shock and
slipping
(

P.23Ad-18

)

Does not shift
according to
instructions

−

Early or late
shifting in all
gears (

P.23Ad-

)

−

Early or late
shifting in all
gears (

P.23Ad-

)

Does not shift

−

No diagnostic
trouble code
(

P.23Ad-25

)

Input shaft
speed sensor
system
(

P.23Ac-47

)

Output shaft
speed sensor
system
(

P.23Ac-65

)

STEP CONDITION

BEFORE TEST/
OPERATION

TEST/
OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-12

Use scan tool
MB991502 to
stop the
INVECS-II
function.
Transmission
range: D (on a
flat and straight
road.)

(1) Select to the
sport mode while
driving at 60 km/
h (37 mph) in 5th
gear, shift down
to 4th gear.
(2) While driving
at 40 km/h (37
mph) in 4th gear,
down shift to 3
range.
(3) While driving
at 20 km/h (25
mph) in 3rd gear,
down shift to 2nd
gear.
(4) While driving
at 20 km/h (12
mph) in 2nd
gear, down shift
to 1st gear.