Mitsubishi Montero (2002-2004). Manual - part 874

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-37

TF LOW 
DETECT

75

4LLc detection 
switch

Ignition switch: ON
Transmission 
range: N

Transfer position: 4L 
Lc

ON

Transfer position: 
Other than above

OFF

TP SENSOR 11

Throttle position 
sensor

Ignition switch: ON
Engine: Stopped
Transmission 
range: P

Accelerator pedal: 
Fully closed

200 

− 800 mV

Accelerator pedal: 
Depressed

Gradually rises 
from the above 
value

Accelerator pedal: 
Fully open

3,800 

− 4,900 mV

TFT 
SENSOR

15

Transmission fluid 
temperature sensor

Warmed up

Drive for 15 minutes 
or more so that the 
transmission fluid 
temperature 
becomes 70 

− 80°C 

(158 

− 176°F)

Gradually rises to 
70 

− 80°C (158 − 

176

°F)

U/D SOL 
DUTY

32

Underdrive solenoid 
valve duty %

Transmission 
range: Sport mode

Driving at constant 
speed of 10 km/h 
(6.2 mph) in 1st gear

0 %

Transmission 
range: Sport mode

Driving at constant 
speed of 30 km/h (19 
mph) in 2nd gear

0 %

Transmission 
range: Sport mode

Driving at constant 
speed of 50 km/h (31 
mph) in 3rd gear

0 %

Transmission 
range: Sport mode

Driving at constant 
speed of 50 km/h (31 
mph) in 4th gear

0 %

Transmission 
range: Sport mode

Driving at constant 
speed of 70 km/h (43 
mph) in 5th gear

100 %

VSS

29

Vehicle speed 
sensor

Transmission 
range: Sport mode

Idling with 1st gear 
(Vehicle stopped)

0 km/h (0 mph)

Driving at constant 
speed of 50 km/h (31 
mph)

50 km/h (31 mph)

MUT-II SCAN 
TOOL 
DISPLAY

ITEM 
NO.

INSPECTION ITEM INSPECTION REQUIREMENT

NORMAL 
CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-38

ACTUATOR TEST REFERENCE TABLE

M1231101000109

INVECS-II CANCEL COMMAND

M1231109300096

MUT-II SCAN 
TOOL 
DISPLAY

ITEM 
NO.

INSPECTION ITEM

TEST CONTENT

INSPECTION 
REQUIREMENT

NORMAL 
CONDITION

1st SHIFT 
LMP

07

1st indicator light

Illuminate each 
indicator light for 
three to the signal 
from the MUT-II

• Ignition switch: 

ON

• Transmission 

range: P

• Engine: 

stopped

• Throttle 

opening 
voltage: Less 
than one volt

Shift indicator light 
illuminates.

2nd SHIFT 
LMP

08

2nd indicator light

2ND SOL

03

Second solenoid valve

Drive the solenoid 
valve specified by 
the scan tool 
(MUT-II) at 50 % 
duty for five 
seconds. No other 
solenoid valve 
should be 
energized.

The solenoid 
should click when 
activated

3rd SHIFT 
LMP

09

3rd indicator light

Illuminate each 
indicator light for 
three to the signal 
from the MUT-II.

Shift indicator light 
illuminates.

4th SHIFT 
LMP

10

4th indicator light

5th SHIFT 
LMP

11

5th indicator light

A/T RELAY

12

A/T control relay

Actuator test in 
scope mode, data 
list No. 54. Control 
relay is OFF for 
three seconds.

Data list No. 54

• (1 )During test: 

0 V

• (2) Normal: 

Battery positive 
voltage [12 V]

L/R SOL

01

Low-reverse solenoid 
valve

Drive the solenoid 
valve specified by 
the scan tool 
(MUT-II) at 50 % 
duty for five 
seconds. No other 
solenoid valve 
should be 
energized.

The solenoid 
should click when 
activated

O/D SOL

04

Overdrive solenoid 
valve

RED SOL

05

Reduction solenoid 
valve

TCC SOL

06

Torque converter clutch 
solenoid valve

U/D SOL

02

Underdrive solenoid 
valve

MUT-II SCAN 
TOOL 
DISPLAY

ITEM 
NO.

ITEM

CONTENT

REMARKS

Std. SHIFT 
PATN

14

Standard 
shift pattern

Stops the INVECS-II 
control and shifts 
gears according to 
the standard shift 
pattern.

Use this function when performing procedure 8 in 
the road tests. (Refer to 

P.23Ab-7

.)

The INVECS-II cancel command will last until the 
ignition switch is turned from "ON" to "LOCK" 
(OFF) or vice versa.

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-39

PCM TERMINAL VOLTAGE REFERENCE CHART FOR TRANSMISSION

M1231101400129

AC204035AB

D-132

D-133

D-134

D-135

D-136

TERMINAL 
NO.

INSPECTION ITEMS

INSPECTION REQUIREMENT

NORMAL CONDITION

39

Stoplight switch

Ignition switch: ON
Brake pedal: Depressed

Battery positive voltage

Ignition switch: ON
Brake pedal: Released

1 V or less

55

4LLc detection switch

Ignition switch: ON
Selector lever operation: N
Transfer position: 4LLc

1 V or less

Ignition switch: ON
Selector lever operation: N
Transfer position: Other than above

Battery positive voltage

64

Input shaft speed sensor Measure between terminals 88 and 64 

with an oscilloscope.
Engine: 2,000 r/min
Gear range: 4th gear

Refer to 

P.23Ab-42

, 

Inspection Procedure 
Using an Oscilloscope.

66

Transmission range 
switch: P

Ignition switch: ON
Transmission range: P

Battery positive voltage

Ignition switch: ON
Transmission range: Other than above

1 V or less

67

Transmission range 
switch: R

Ignition switch: ON
Transmission range: R

Battery positive voltage

Ignition switch: ON
Transmission range: Other than above

1 V or less

68

Shift switch (Down)

Ignition switch: ON
Selector lever operation: Downshift and 
hold the selector lever

Battery positive voltage

Ignition switch: ON
Selector lever operation: Other than 
above

1 V or less

70

Crankshaft position 
sensor

Engine: Idling

1.5

− 2.5 V

73

Output shaft speed 
sensor

Measure between terminals 88 and 73 
with an oscilloscope.
Engine: 2,000 r/min
Gear range: 4th gear

Refer to 

P.23Ab-42

, 

Inspection Procedure 
Using an Oscilloscope.

75

Transmission range 
switch: N

Ignition switch: ON
Transmission range: N

Battery positive voltage

Ignition switch: ON
Transmission range: Other than above

1 V or less

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION DIAGNOSIS

23Ab-40

76

Transmission range 
switch: D

Ignition switch: ON
Transmission range: D

Battery positive voltage

Ignition switch: ON
Transmission range: Other than above

1 V or less

77

Shift switch (Up)

Ignition switch: ON
Selector lever operation: Upshift and 
hold the selector lever

Battery positive voltage

Ignition switch: ON
Selector lever operation: Other than 
above

1 V or less

79

Vehicle speed sensor

Measure between terminals 131 and 79 
with an oscilloscope.
Engine: 2,000 r/min
Gear range: 4th gear

Refer to 

P.23Ab-42

, 

Inspection Procedure 
Using an Oscilloscope.

85

Select switch

Ignition switch: ON
Selector lever operation: Sport mode

Battery positive voltage

Ignition switch: ON
Selector lever operation: Other than 
above

1 V or less

119

Transmission fluid 
temperature sensor

Transmission fluid temperature: 20

°C 

(68

°F)

3.8 

− 4.0 V

Transmission fluid temperature: 40

°C 

(104

°F)

3.2 

− 3.4 V

Transmission fluid temperature: 80

°C 

(176

°F)

1.7 

− 1.9 V

121

Shift indicator light: 1st

Engine: Idling
Gear range: 1st gear

Battery positive voltage

Engine: Idling
Gear range: Other than 1st gear

1 V or less

122

Shift indicator light: 5th

Engine: Idling
Gear range: 5th gear

Battery positive voltage

Engine: Idling
Gear range: Other than 5th gear

1 V or less

123

Solenoid valve power 
supply

Ignition switch: LOCK (OFF)

1V or less

Ignition switch: ON

Battery positive voltage

124

Solenoid valve power 
supply

Ignition switch: LOCK (OFF)

1V or less

Ignition switch: ON

Battery positive voltage

125

Shift indicator light: 2nd Engine: Idling

Gear range: 2nd gear

Battery positive voltage

Engine: Idling
Gear range: Other than 2nd gear

1 V or less

127

A/T control relay

Ignition switch: ON

Battery positive voltage

TERMINAL 
NO.

INSPECTION ITEMS

INSPECTION REQUIREMENT

NORMAL CONDITION