1996 ACURA RL KA9 Service Repair Manual

Description
Hydraulic Flo w
Genera l Char t o f Hydrauli c Pressur e
Line Pressur e Modulato
r Pressur e
Throttl e B Pressur e
Clutc h Pressur e
Lin e Pressur e Contro l Pressur e
Torqu e Converte r Pressur e
Lubricatio n Pressur e
Distributio n o f Hydrauli c Pressur e
Regulato r Valv e
Manua l Valv e - Torqu
e Converte r Pressur e
• Lubricatio n Pressur e
T o Regulat e Lin e Pressur e
Modulato r Valv e
To Selec t Lin e Pressur e
Clutc h Pressur e Clutc
h Pressur e
Shift Solenoi d Valve s
Torque Converte r Clutc h (Lock-u p Control )
Solenoi d Valve s
Regulato r Valv e
Throttl e B Pressur e
Line Pressur e Contro l Pressur e
Lin e Pressur e Contro l Valv e
Throttl e Valv e
1-2 Shif t Valv e
2- 3 Shif t Valv e
3- 4 Shif t Valv e
Modulato r Pressur e
ATF Pum p Regulator Valv e
ProCarManuals.com

Position

As the engine turns, the ATF pump also starts to operate. Automatic transmission fluid (ATF) is drawn from (99) and dis-

charged into (1). Then, ATF flowing from the ATF pump becomes the line pressure (1). The line pressure (1) is regulated

by the regulator valve. The torque converter inlet pressure (92) enters (94) of the torque converter through the lock-up

shift valve and discharges into (90). The torque converter check valve prevents the torque converter pressure from rising.

Under this condition, the hydraulic pressure is not applied to the clutches as the manual valve stops line pressure (1).

NOTE:

• When used, "left" or "right" indicates direction on the hydraulic circuit.

• The hydraulic circuit is for '96 - '98 models. On '99 - 01 models, the 2nd accumulator is different.ProCarManuals.com

Hydraulic Flo w (cont'd )
Position
The lin e pressur e (1 ) flow s t o th e manua l valve , th e modulator valve, th e lin e pressur e contro l valv e an d th e throttl e valve .
Th e lin e pressur e (1 ) become s th e modulato r pressur e (6 ) a t th e modulato r valve , an d th e lin e pressur e (4 ) an d (7) , an d th e
1st-hol d clutc h pressur e (70 ) a t th e manua l valve . Th e modulato r pressur e (6 ) flow s t o th e 1- 2 shif t valve , th e 2- 3 shif t
valve an d th e 3- 4 shif t valv e becaus e th e shif t solenoi d valv e A is turne d OF F an d B is turne d O N b y th e PCM , an d th e 1- 2
shif t valv e is move d t o th e righ t side . Th e lin e pressur e (4 ) becomes the 1s t clutc h pressur e (10 ) a t th e 1- 2 shif t valve . Th e
1s t clutc h pressur e (10 ) i s applie d t o th e 1s t clutch , an d th e 1s t clutc h i s engaged . Th e lin e pressur e (7 ) become s th e 1st -
hol d clutc h pressur e (70 ) a t th e 1- 2 shif t valve . Th e Ist-hol d clutc h pressur e (70 ) i s applie d t o th e 1st-hol d clutch , an d th e
1st-hol d clutc h i s engaged .
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 .
• Th e hydrauli c circui t i s fo r '9 6 - '9 8 models . O n '9 9 - 0 1 models , th e 2n d accumulato r i s different .
Descriptio n
ProCarManuals.com

Position

The line pressure (1) flows to the manual valve, the modulator valve, the line pressure control valve and the throttle valve.

The line pressure (1) becomes the modulator pressure (6) at the modulator valve, the line pressure (4) and the 1st-hold

clutch pressure (70) at the manual valve. The modulator pressure (6) does not flow to each shift valve because shift

solenoid valves A and B are turned ON by the PCM. The line pressure (4) passes through the 1-2 shift valve and the 2-3

shift valve, then changes to the 2nd clutch pressure (20) at the orifice. The 2nd clutch pressure (20) is applied to the 2nd

clutch, and the 2nd clutch is engaged. The 1st-hold clutch pressure (70) passes through the 1-2 shift valve, then goes to

the 1st-hold clutch. The 1st-hold clutch is engaged. Power is transmitted only during deceleration through the 1st-hold

clutch.

NOTE:

• When used, "left" or "right" indicates direction on the hydraulic circuit.

• The hydraulic circuit is for '96 - '98 models. On '99 - 01 models, the 2nd accumulator is different.ProCarManuals.com

Hydraulic Flo w (cont'd )
or Positio n
1 .
1s t Gea r
The flo w o f flui d throug h th e torqu e converte r circui t i s th e sam e a s in position . Th e lin e pressur e (1) flow s throug h
the manua l valve , th e modulato r valve , th e lin e pressur e contro l valv e an d th e throttl e valve . Th e lin e pressur e (1 )
become s th e modulato r pressur e (6 ) a t th e modulato r valve , an d th e lin e pressur e (4 ) a t th e manua l valve . Th e modula -
to r pressur e (6 ) flow s t o th e lef t end s o f th e 1- 2 shif t valv e an d th e 3- 4 shif t valv e becaus e shif t solenoi d valv e A is
turne d OF F an d B is turne d O N b y th e PCM . Th e 1- 2 shif t valv e is move d t o th e righ t side , an d uncover s th e por t t o
allo w th e 1s t clutc h pressur e
(10) to th e 1s t clutch . Th e 1s t clutc h pressur e (10 ) i s applie d to th e 1s t clutch , consequent -
ly, th e vehicl e wil l mov e a s th e engin e powe r i s transmitted . I n o r position , th e 1st-hol d clutc h pressur e i s no t
applie d to th e 1st-hol d clutc h becaus e th e manua l valv e cover s th e por t leadin g to 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 .
• Th e hydrauli c circui t i s fo r
'96 - '9 8 models . O n '99 - 0 1 models , th e 2n d accumulato r i s different .
Descriptio n
ProCarManuals.com