Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 434

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-27

8

Use the scan
tool (MUT-II) to
stop the
INVECS-II
function.
Selector lever
position: D (on a
flat and straight
road.)

Monitor data list No. 11,
23, and 63 with the scan
tool (MUT-II).
Vehicles without sport
mode
(1)Accelerate to 4th gear
at a throttle position sensor
output of 1.5V (accelerator
opening angle of 30 %).
(2)Slowly decelerate to a
stop.
(3)Accelerate to 4th gear
at a throttle position sensor
output of 2.5 V (accelerator
opening angle of 50%).
(4)While driving at 60 km/h
(37 mph) in 4th gear, shift
down to 3 range.
(5)While driving at 40 km/h
(25 mph) in 3rd gear, shift
down to 2 range.
(6)While driving at 20 km/h
(12 mph) in 2nd gear, shift
down to L range.
<Vehicles with sport
mode>
(1)Accelerate to 4th gear
at a throttle position sensor
output of 1.5V (accelerator
opening angle of 30 %).
(2)Slowly decelerate to a
stop.
(3)Accelerate to 4th gear
at a throttle position sensor
output of 2.5 V (accelerator
opening angle of 50%).
(4)Select to the sport mode
while driving at 60 km/h
(37 mph) in 4th gear, shift
down to 3rd gear.
(5)While driving at 40 km/h
(25 mph) in 3rd gear, shift
down to 2nd gear.
(6)While driving at 20 km/h
(12 mph) in 2nd gear, shift
down to 1st gear.

For (1), (2) and
(3), the reading
should be the
same as the
specified output
shaft speed, and
no abnormal shift
shocks should
occur.
For (4), (5) and
(6), downshifting
should occur
immediately after
moving the
selector lever.

Does not
shift from 2
to 3 or 3 to
2

33

Second
solenoid valve
system (

P.23A-

200

.)

34

Overdrive
solenoid valve
system (

P.23A-

207

.)

42

2nd gear
incorrect ratio
(

P.23A-221

.)

43

3rd gear
incorrect ratio
(

P.23A-221

.)

STEP

CONDITION BEFORE
TEST/OPERATION

TEST/OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-28

8

Use the scan
tool (MUT-II) to
stop the
INVECS-II
function.
Selector lever
position: D (on a
flat and straight
road.)

Monitor data list No. 11,
23, and 63 with the scan
tool (MUT-II).
<Vehicles without sport
mode>
(1)Accelerate to 4th gear
at a throttle position sensor
output of 1.5V (accelerator
opening angle of 30 %).
(2)Slowly decelerate to a
stop.
(3)Accelerate to 4th gear
at a throttle position sensor
output of 2.5 V (accelerator
opening angle of 50%).
(4)While driving at 60 km/h
(37 mph) in 4th gear, shift
down to 3 range.
(5)While driving at 40 km/h
(25 mph) in 3rd gear, shift
down to 2 range.
(6)While driving at 20 km/h
(12 mph) in 2nd gear, shift
down to L range.
<Vehicles with sport
mode>
(1)Accelerate to 4th gear
at a throttle position sensor
output of 1.5V (accelerator
opening angle of 30 %).
(2)Slowly decelerate to a
stop.
(3)Accelerate to 4th gear
at a throttle position sensor
output of 2.5 V (accelerator
opening angle of 50%).
(4)Select to the sport mode
while driving at 60 km/h
(37 mph) in 4th gear, shift
down to 3rd gear.
(5)While driving at 40 km/h
(25 mph) in 3rd gear, shift
down to 2nd gear.
(6)While driving at 20 km/h
(12 mph) in 2nd gear, shift
down to 1st gear.

For (1), (2) and
(3), the reading
should be the
same as the
specified output
shaft speed, and
no abnormal shift
shocks should
occur.
For (4), (5) and
(6), downshifting
should occur
immediately after
moving the
selector lever.

Does not
shift from 3
to 4 or 4 to
3

32

Underdrive
solenoid valve
system (

P.23A-

193

.)

33

Second
solenoid valve
system (

P.23A-

200

.)

43

3rd gear
incorrect ratio
(

P.23A-221

.)

44

4th gear
incorrect ratio
(

P.23A-221

.)

STEP

CONDITION BEFORE
TEST/OPERATION

TEST/OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-29

TORQUE CONVERTER STALL TEST

M1231005400049

This test measures the maximum engine speed when the
selector lever is at the "D" or "R" position and the torque
converter stalls this test the operation of the torque converter,
starter motor and one-way clutch operation and the holding
performance of the clutches and brakes in the transaxle.

WARNING

Do not let anybody stand in front of or behind the
vehicle while this test is being carried out.

1. Check the A/T fluid level and temperature. Check the engine

coolant temperature.

•

A/T fluid level: At the "HOT" mark on the dipstick

•

A/T fluid temperature: 70

−

80

°

C (158

−

176

°

F

)

•

Engine coolant temperature: 80

−

100

°

C

(176

−

212

°

F

)

2. Chock both rear wheels.

3. Connect a tachometer.

4. Apply the parking and service brakes fully.

5. Start the engine.

6. Move the selector lever to the "D" position. Fully depress the

accelerator pedal and read the maximum engine speed.

CAUTION

•

The throttle should not be left fully open for any more
than eight seconds.

•

If carrying out the stall test two or more times, move the
selector lever to the "N" position and run the engine at
1,000 r/min to let the A/T fluid cool down before
carrying out subsequent tests.

Standard value: Stall speed: 2,100 - 2,600 r/min

7. Move the selector lever to the "R" position and repeat step

6.

Standard value: Stall speed: 2,100 - 2,600 r/min

9

Selector lever
position: N (on a
flat and straight
road.)

Monitor data list No. 22
and No. 23 with the scan
tool (MUT-II).
(1)Move selector lever to R
range, drive at constant
speed of 10 km/h (6.2
mph).

The ratio
between data list
No. 22 and No.
23 should be the
same as the gear
ratio when
reversing.

Does not
engage

22

Input shaft
speed sensor
system (

P.23A-

103

.)

23

Output shaft
speed sensor
system (

P.23A-

115

.)

46

Reverse gear
incorrect ratio
(

P.23A-221

.)

STEP

CONDITION BEFORE
TEST/OPERATION

TEST/OPERATION

STANDARD

INSPECTION
ITEM

DTC

INSPECTION
PROCEDURE
PAGE

AC001824 AB

REVERSE
CLUTCH

LOW-
REVERSE
BRAKE

ONE-WAY
CLUTCH

UNDER-
DRIVE
CLUTCH

TORQUE
CONVERTER

OVERDRIVE
CLUTCH

SECOND
BRAKE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-30

TORQUE CONVERTER STALL TEST JUDGEMENT
RESULTS

1. Stall speed is too high in both "D" range only

•

Low line pressure

•

Low-reverse brake slippage and malfunction of one-way
clutch

2. Stall speed is too high in "D" range only

•

Underdrive clutch slippage

3. Stall speed is too high in "R" range only

•

Reverse clutch slippage

4. Stall speed too low in both "D" and "R" ranges

•

Malfunction of torque converter

•

Insufficient engine output

HYDRAULIC PRESSURE TESTS

M1231005500046

1. Check the A/T fluid level and temperature. Check engine

coolant temperature.

•

A/T fluid level: "HOT" mark on the dipstick

•

A/T fluid temperature: 70

−

80

°

C

(

158 - 176

°

F

)

•

Engine coolant temperature: 80

−

100

°

C (176

−

212

°

F)

2. Jack up the vehicle so that the wheels are free to turn.