Mitsubishi Eclipse. Manual — part 755

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-29

STANDARD HYDRAULIC PRESSURE TEST

NOTE: If the torque converter pressure is measured, the engine speed should be 1,500 r/min or less.

HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE

MEASUREMENT CONDITION

STANDARD HYDRAULIC PRESSURE MPa (psi)

SELECTOR LEVER
POSITION

SHIFT
POSITION

ENGINE
SPEED
(r/min)

UNDERDRIVE
CLUTCH
PRESSURE
[UD]

REVERSE
CLUTCH
PRESSURE
[RV]

OVERDRIVE
CLUTCH
PRESSURE
[OD]

LOW-
REVERSE
BRAKE
PRESSURE
[LR]

SECOND
BRAKE
PRESSURE
[2ND]

TORQUE
CONVERTER
PRESSURE
[DR]

P

−

2,500

−

−

−

0.31

− 0.39

(45

− 57)

−

0.25

− 0.39

(37

− 57)

R

Reverse 2,500

−

1.27

− 1.77

(185

− 256)

−

1.27

− 1.77

(185

− 256)

−

0.50

− 0.70

(73

− 101)

N

−

2,500

−

−

−

0.31

− 0.39

(45

− 57)

−

0.25

− 0.39

(37

− 57)

L <Vehicles
without sport
mode> or Sport
mode <Vehicles
with sport mode>

1st gear 2,500

1.01

− 1.05

(147

− 152)

−

−

1.01

− 1.05

(147

− 152)

−

0.50

− 0.70

(73

− 101)

2 <Vehicles
without sport
mode> or Sport
mode <Vehicles
with sport mode>

2nd gear 2,500

1.01

− 1.05

(147

− 152)

−

−

−

1.01

− 1.05

(147

− 152)

0.50

− 0.70

(73

− 101)

3 <Vehicles
without sport
mode> or Sport
mode <Vehicles
with sport mode>

3rd gear 2,500

0.59

− 0.69

(86

− 100)

−

0.59

− 0.69

(86

− 100)

−

−

−

D <Vehicles
without sport
mode> or Sport
mode <Vehicles
with sport mode>

4th gear 2,500

−

−

0.59

− 0.69

(86

− 100)

−

0.59

− 0.69

(86

− 100)

−

SYMPTOMS

PROBABLE CAUSE

All hydraulic pressures are high. Malfunction of the regulator valve
All hydraulic pressures are low.

Malfunction of the oil pump
Clogged internal oil filter
Clogged oil cooler
Malfunction of the regulator valve
Malfunction of the relief valve
Incorrect valve body installation
Improperly installed solenoid valves
Damaged solenoid valve O-rings

Hydraulic pressure is abnormal
in reverse gear only.

Malfunction of the regulator valve
Clogged orifice
Incorrect valve body installation

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-30

Hydraulic pressure is abnormal
in 3rd or 4th gear only.

Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction of the regulator valve
Malfunction of the switch valve
Clogged orifice
Incorrect valve body installation

Only underdrive clutch hydraulic
pressure is abnormal.

Malfunction of the oil seal K
Malfunction of the oil seal L
Malfunction of the oil seal M
Malfunction of the underdrive solenoid valve
Malfunction of the underdrive pressure control valve
Malfunction of check ball
Clogged orifice
Incorrect valve body installation

Only reverse clutch hydraulic
pressure is abnormal.

Malfunction of the oil seal A
Malfunction of the oil seal B
Malfunction of the oil seal C
Clogged orifice
Incorrect valve body installation

Only overdrive clutch hydraulic
pressure is abnormal.

Malfunction of the oil seal D
Malfunction of the oil seal E
Malfunction of the oil seal F
Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction of check ball
Clogged orifice
Incorrect valve body installation

Only low-reverse brake
hydraulic pressure is abnormal.

Malfunction of the oil seal I
Malfunction of the oil seal J
Malfunction of the low-reverse solenoid valve
Malfunction of the low-reverse pressure control valve
Malfunction of the switch valve
Malfunction of the fail safe valve A
Malfunction of check ball
Clogged orifice
Incorrect valve body installation

SYMPTOMS

PROBABLE CAUSE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-31

Only second brake hydraulic
pressure is abnormal.

Malfunction of the oil seal G
Malfunction of the oil seal H
Malfunction of the oil seal O
Malfunction of the second solenoid valve
Malfunction of the second pressure control valve
Malfunction of the fail safe valve B
Clogged orifice
Incorrect valve body installation

Only torque converter pressure
is abnormal.

Clogged oil cooler
Malfunction of the oil seal N
Malfunction of the torque converter clutch solenoid
Malfunction of the torque converter pressure control valve
Clogged orifice
Incorrect valve body installation

Pressure applied to element
which should not receive
pressure.

Incorrect transaxle control cable adjustment
Malfunction of the manual valve
Malfunction of check ball
Incorrect valve body installation

SYMPTOMS

PROBABLE CAUSE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-32

OIL SEAL LAYOUT

AC006024 AB

A

B

C

D

E

F G

H

I

J

K

L

M

N

O