1995 ACURA TL ECO mode

Hydraulic Control/Lower Valve Body Assembly — '96 Model

The lower valve body assembly is located on the bottom of the transmission housing. The lower valve body assembly

consists of the main valve body, the secondary valve body, and the ATF passage.

Main Valve Body

The main valve body houses the manual valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the 4-3 kick-down

valve, and the Clutch Pressure Control (CPC) valve.

The primary functions of the main valve body are to switch fluid pressure on and off, and to control the hydraulic pressure

going to the hydraulic control system.

Secondary Valve Body

The secondary valve body is located on the main valve body. The secondary valve body houses the modulator valve, the

3-4 orifice control valve, the 4-3 shift timing valve, the 1st accumulator piston, and the 2nd accumulator piston. The shift

control solenoid valves A and B are bolted to the secondary valve body.

Throttle Valve Body/Linear Solenoid

The throttle valve body is joined with the linear solenoid, which is controlled by the PCM. The throttle valve body/linear

solenoid assembly is located on the secondary valve body. The throttle valve body houses the throttle valve.

SHIFT CONTROL

SOLENOID VALVE B

SHIFT CONTROL

SOLENOID VALVE A

MODULATOR VALVE

1ST ACCUMULATOR

PISTON

SECONDARY VALVE

BODY

MAIN VALVE BODY

MANUALVALVE

CPC VALVE
LINEAR SOLENOID

THROTTLE VALVE BODY

THROTTLE VALVE

2ND ACCUMULATOR

PISTON

3-4 ORIFICE CONTROL

VALVE

4-3

SHIFT TIMING VALVE

4-3 KICK-DOWN

VALVE

3-4 SHIFT VALVE

2-3 SHIR VALVE

1-2 SHIFT VALVE

(cont'd)ProCarManuals.com

Hydraulic Control (cont'd)/Lower Valve Body Assembly — '97 - '98 Models

The lower valve body assembly is located on the bottom of the transmission housing. The lower valve body assembly

consists of the main valve body, the secondary valve body, and the ATF passage.

Main Valve Body

The main valve body houses the manual valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the 4-3 kick-down

valve, and the main orifice control valve. The primary functions of the main valve body are to switch fluid pressure on and

off, and to control the hydraulic pressure going to the hydraulic control system.

Secondary Valve Body

The secondary valve body is located on the main valve body. The secondary valve body houses the line pressure control

valve, the modulator valve, the 3-4 orifice control valve, the 4-3 shift timing valve, the 1st accumulator piston, and the 2nd

accumulator piston. The shift control solenoid valves A and B are bolted to the secondary valve body.

Throttle Valve Body/Linear Solenoid

The throttle valve body is joined with the linear solenoid, which is controlled by the PCM. The throttle valve body/linear

solenoid assembly is located on the secondary valve body. The throttle valve body houses the throttle valve.

LINE PRESSURE

CONTROL VALVE

LINEAR SOLENOID

SHIFT CONTROL

SOLENOID VALVE B

SHIFT CONTROL

SOLENOID VALVE A

MODULATOR VALVE

1ST ACCUMULATOR

PISTON

SECONDARY VALVE

BODY

MAIN VALVE BODY

MANUAL VALVE

MAIN ORIFICE CONTROL VALVE
THROTTLE VALVE BODY

THROTTLE VALVE

2ND ACCUMULATOR

PISTON

3-4 ORIFICE CONTROL

VALVE

4-3

SHIFT TIMING VALVE

4-3 KICK-DOWN

VALVE

3-4 SHIFT VALVE

2-3 SHIFT VALVE

1-2 SHIFT VALVE
DescriptionProCarManuals.com

Description
Hydraulic Flo w — '9 6 Mode l (cont'd )
Position
Lin e pressur e (1 ) flow s t o th e manua l valve , th e modulato r valve , an d th e throttl e valve . Lin e pressur e (1 ) become s modu -
lato r pressur e (6 ) a t th e modulato r valve , an d lin e pressur e (4 ) an d
(4') , and 1st-hol d clutc h pressur e (70 ) a t th e manua l
valve .
Modulato r pressur e (6 ) flow s t o th e lef t en d o f th e 1- 2 shif t valv e an d t o th e righ t en d o f th e 3- 4 shif t valv e becaus e shif t
contro l solenoi d valv e A is turne d OF F an d B is turne d O N b y th e PCM , 1- 2 shif t valv e i s move d t o th e righ t side , an d 3- 4
shif t valv e i s move d t o th e lef t side . Th e 1st-hol d clutc h pressur e (70 ) become s lin e pressur e (7 ) a t th e manua l valve , the n
goe s t o th e 2- 3 shif t valve . Th e 2- 3 shif t valv e remain s i n th e righ t side .
Lin e pressur e (4 ) become s 1s t clutc h pressur e (11) . Th e 1s t clutc h pressur e (11 ) i s applie d t o th e 1s t clutch , an d th e 1s t
clutc h i s engaged .
Flui d flow s b y wa y of :
Lin e pressur e (1 ) als o become s 1st-hol d clutc h pressur e (70) , an d it flow s t o th e 1st-hol d clutc h an d th e 1st-hol d accumula -
to r vi a th e 2- 3 shif t valve .
Powe r i s transmitte d onl y durin g deceleratio n throug h th e 1st-hol d clutch .
NOTE : Whe n used , "left " o r "right " indicate s directio n o n th e hydrauli c circuit .
-
Lin e Pressur e (4 )
CPC Valv e - Lin e Pressur e
(4')
Manua l Valv e - 1s t Clutc h Pressur e (10 )
Pressur e
(11) 1s t Clutc h
Orifice - 1st Clutc h Pressur e (11 )
1-
2 Shif t Valv e - 1s t Clutc h Pressur e
(10')
1-2 Shif t Valve-1s t Clutch
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Description

Hydraulic Flow — '96 Model (cont'd)

or
Position

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
1. 1st Gear

Line pressure (1) flows to the manual valve, the modulator valve, and the throttle valve. Line pressure (1) becomes

modulator pressure (6) at the modulator valve, and line pressure (4) at the manual valve.

Modulator pressure (6) flows to the left end of the 1-2 shift valve and right end of the 3-4 shift valve because shift con-

trol solenoid valve A is turned OFF and B is turned ON by the PCM, 1-2 shift valve is moved to the right side, and the 3-

4 shift valve is moved to the left side.

Line pressure (1) also becomes 1st clutch pressure (10). The 1st clutch pressure (10) is applied to the 1st clutch and 1st

accumulator, causing the vehicle to move as engine power is transmitted.

valve covers the port to leading to the 1st-hold clutch.
position.

The flow of fluid through the torque converter circuit is the same as in

In

or
position at 1st speed, the 1st-hold clutch pressure is not applied to the 1st-hold clutch because the manualProCarManuals.com

Description

or
Position
Hydraulic Flow — '96 Model (cont'd)

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
3. 3rd Gear

As the speed of the vehicle reaches the prescribed value, shift control solenoid valve B is turned OFF by the PCM. Shift

control solenoid valve A remains ON. Modulator pressure (6B) flows to the right ends of the 1-2 shift valve and the 2-3

shift valve. The 2-3 shift valve is moved to the left side by modulator pressure (6B). The 2-3 shift valve uncovers the

port to allow line pressure (5) to the 3-4 shift valve as this valve is moved to the left side. Line pressure (5') becomes

the 3rd clutch pressure. The 3rd clutch pressure (30) is applied to the 3rd clutch, and the 3rd clutch is engaged.

Fluid flows by way of:

- Line Pressure (4)

Hydraulic pressure also flows to the 1st clutch and 2nd clutch. However, no power is transmitted because of the one-

way clutches.
2-3 Shift Valve - Line

1-2 Shift Valve - Line Pressure (5)

3rd Clutch

3-4 Shift Valve - 3rd Clutch Pressure (30)
CPC Valve - Line Pressure (4')

Pressure (5')ProCarManuals.com

Description

Hydraulic Flow — '96 Model (cont'd)

Position

The flow of fluid through the torque converter circuit is the same as in

Line pressure (1) becomes modulator pressure (6) at the modulator valve, and line pressure (3) at the manual valve.

Modulator pressure (6) flows to the right ends of the 1-2 shift valve and 2-3 shift valve because shift control solenoid valve

A is turned ON and B is turned OFF by the PCM, and those valves are moved to the left side.

Line pressure (3) flows to the 1-2 shift valve, and it becomes reverse clutch pressure (50). Reverse clutch pressure (50) is

applied to the reverse clutch, and the reverse clutch is engaged.
position.

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
Reverse Inhibitor Control

When the

1st signal to shift control solenoid valves A and B; shift control solenoid valve A is turned OFF, shift control solenoid valve

B is turned ON. The 1-2 shift valve is moved to the right side and covers the port to stop line pressure (3) to the reverse

clutch. Line pressure (3) is not applied to the reverse clutch, and reverse clutch pressure (50) is not applied to the reverse

clutch, as a result, power is not transmitted in the reverse direction.
position is selected while the vehicle is moving forward at speeds over 6 mph (10 km/h), the PCM outputs theProCarManuals.com

Secondary Valv e Bod y — '97 - '9 8 Model s
Disassembly/Inspection/Reassembl y
NOTE:
Clea n al l part s thoroughl y i n solven t o r carbureto r cleaner , an d dr y wit h compresse d air .
Blo w ou t al l passages .
Chec k al l valve s fo r fre e movement . I f an y fai l t o slid e freely , se e Valv e Bod y Repai r o n pag e 14-146 .
Coat al l part s wit h AT F durin g assembly .
Install th e filter s in th e directio n shown .
2ND ACCUMULATOR COVER
1ST ACCUMULATOR COVER
O-RIN GReplace .
3-4 ORIFIC E CONTRO L VALV E
VALVE CA P
ROLLE R
LINE PRESSUR ECONTROL VALV E
VALVE SLEEV E
VALVE CA P CLI P
SHIF T CONTRO LSOLENOID VALV EFILTER SReplace .
VALVE SLEEV E
4-3 SHIF T TIMIN GVALV E
SECONDAR Y VALV E BOD YInspec t fo r wear , scratche sand scoring .
SPRING SEA T
MODULATO R VALV E
O-RING Replace .
2ND ACCUMULATO R PISTO N
1ST ACCUMULATO R PISTO N
SPRING SPECIFICATION SRINGS Replace .
Unit: m m (in )
No.Sprin g
3-4 orific e contro l valv e sprin g
4-3 shif t timin g valv e sprin g
2nd accumulato r sprin g A
1s t accumulato r sprin g
Modulato r valv e sprin g
Line pressur e contro l valv e sprin g
Standar d (New )
Wire Dia .
1.1 (0.043 )
0. 7 (0.028 )
3.2(0.126 )
2. 7 (0.106 )
1.2(0.047 )
0.8(0.031)
O.D.
7.1 (0.280 )
7. 1 (0.280 )
23. 7 (0.933 )
18.0(0.709 )
7. 0 (0.276) *
6. 1 (0.240 )
Free Lengt h
47.7(1.878 )
35.0(1.378 )
92. 8 (3.654 )
83. 3 (3.280 )
27.6(1.087 )
24. 1 (0.949 )
No. o f Coil s
22.9
20. 4
11. 8
14. 4
7.7
14. 6
*: Insid e Diamete r
O-RINGReplac e
FILTERReplace .
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Shift Contro l Solenoi d
Test
1. Disconnec t th e transmissio n sub-harnes s connecto r
(14P).
2. Measur e th e resistanc e betwee n th e No . 4 termina l
of th e transmissio n sub-harnes s connecto r an d
bod y ground , an d betwee n th e No . 5 termina l an d
bod y ground .
TRANSMISSIO NSUB-HARNESSCONNECTOR (10P )
3. I f th e resistanc e i s ou t o f specification , remov e th e
shif t cabl e cover , an d disconnec t th e shif t contro l
solenoi d valve/linea r solenoi d harnes s connector .
6x 1. 0 m m12N-m(1. 2 kgfm ,8.7 Ibf-ft )
CLAM P
SHIFT CABL ECOVER
4. Measur e th e resistanc e betwee n th e No . 1 termina l
o f th e shif t contro l solenoi d valve/linea r solenoi d
harnes s connecto r an d bod y ground , an d betwee n
the No . 2 termina l an d bod y ground .
SHIFT CONTRO L SOLENOI DVALVE/LINEA R SOLENOI DHARNESS CONNECTO R
Terminal sid e o f
mal e terminal s
• Replac e th e transmissio n sub-harnes s i f th e
resistanc e is withi n specification .
• Replac e th e shif t contro l solenoi d valv e assem -
bl y i f th e resistanc e is ou t o f specification .
5 . I f th e resistanc e i s withi n th e standard , connec t th e
No . 2 termina l o f th e shif t contro l solenoi d valve/lin -
ea r solenoi d harnes s connecto r t o th e batter y posi -
tiv e terminal . A clickin g soun d shoul d b e heard .
Connec t th e No . 1 termina l t o th e batter y positiv e
terminal . A clickin g soun d shoul d b e heard . I f n o
clickin g soun d i s heard , replac e th e shif t contro l
solenoi d valv e assembly .
NOTE : I f solenoi d valv e replacemen t i s required ,
se e th e followin g headings :
• Lowe r Valv e Bod y
Removal/Installatio n
................................... 14-12 1
Disassembly/Reassembl y
'96 Mode l ................................................... . 14-12 2
'97 -'9 8 Model s ......................................... . 14-12 3
• Shif t Contro l Solenoi d Valv e A/ B
Tes t
............................................................. . 14-12 5
Replacemen t
.............................................. . 14-12 5
STANDARD
: 1 2-2 5 W
TRANSMISSIO N SUB-HARNES SCONNECTOR (14P )
STANDARD: 12-25 W
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