Mitsubishi Galant 9G. Manual - part 488

 

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Mitsubishi Galant 9G. Manual - part 488

 

 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-30

STANDARD HYDRAULIC PRESSURE TABLE

<F4A4B>

<F4A5A>

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

MEASUREMENT 
CONDITION

STANDARD HYDRAULIC PRESSURE MPa (psi)

TRANS-
MISSION 
RANGE

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

0.26 

− 0.36 

(37 

− 52)

0.22 

− 0.36 

(32 

− 52)

R

Reverse 2,500

1.27 

− 1.77 

(185 

− 256)

1.27 

− 1.77 

(185 

− 256)

0.50 

− 0.73 

(73 

− 106)

N

2,500

0.26 

− 0.36 

(37 

− 52)

0.22 

− 0.36 

(32 

− 52)

L

1st gear

2,500

0.98 

− 1.05 

(142 

− 152)

0.98 

− 1.05 

(142 

− 152)

0.50 

− 0.73 

(73 

− 106)

2

2nd gear 2,500

0.98 

− 1.05 

(142 

− 152)

0.98 

− 1.05 

(142 

− 152)

0.50 

− 0.73 

(73 

−106)

3

3rd gear

2,500

0.78 

− 0.90 

(113 

− 131)

0.78 

− 0.90 

(113 

− 131)

0.45 

− 0.72 

(65 

−104)

D

4th gear

2,500

0.78 

− 0.90 

(113 

− 131)

0.78 

− 0.88 

(113 

− 128)

0.45 

− 0.72 

(65 

−104)

MEASUREMENT 
CONDITION

STANDARD HYDRAULIC PRESSURE MPa (psi)

TRANS-
MISSION 
RANGE

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

0.26 

− 0.36 

(37 

− 52)

0.22 

− 0.36 

(32 

− 52)

R

Reverse 2,500

1.27 

− 1.77 

(185 

− 256)

1.27 

− 1.77 

(185 

− 256)

0.50 

− 0.73 

(73 

− 106)

N

2,500

0.26 

− 0.36 

(37 

− 52)

0.22 

− 0.36 

(32 

− 52)

Sport 
mode

1st gear

2,500

0.98 

− 1.05 

(142 

− 152)

0.98 

− 1.05 

(142 

− 152)

0.50 

− 0.73 

(73 

− 106)

2nd gear 2,500

0.98 

− 1.05 

(142 

− 152)

0.98 

− 1.05 

(142 

− 152)

0.50 

− 0.73 

(73 

− 106)

3rd gear

2,500

0.78 

− 0.90 

(113 

− 131)

0.78 

− 0.90 

(113 

− 131)

0.45 

− 0.72 

(65 

−104)

4th gear

2,500

0.78 

− 0.90 

(113 

− 131)

0.78 

− 0.88 

(113 

− 128)

0.45 

− 0.72 

(65 

−104)

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-31

HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE

SYMPTOM

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

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 the check ball
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for underdrive clutch

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

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-32

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 the check ball
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for overdrive clutch

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 all the check balls
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for low-reverse brake

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
Malfunction of the accumulator for second brake

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 the check ball
Incorrect valve body installation

SYMPTOM

PROBABLE CAUSE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-33

OIL SEAL LAYOUT

AC006152

A

B

C

D

E

F G

H

I

J K

L

M

N

O

AB

 

 

 

 

 

 

 

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