Acura 2002 RSX Service Manual page 579

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Hydraulic Flow
Distribution of Hydraulic Pressure
As the engine turns, the ATF pump starts to operate. Automatic transmission
fluid (ATF) is drawn through the ATF
s t r a i n e r ( f i l t e r ) a n d d i s c h a r g e d r n t o t h e h y d r a u l i c c i r c u i t T h e n , A T F f l o w i n g f r o m t h e A T F p u m p b e c o m e s l i n e p r e s s u r e
that,s regulated by the regutator valve. Tbrque converter pressure from the
regulator valve enters the torque converter
throughihe lock-up shift valve, and it is discharged from the torque converter.
The torque converter check valve
prevents torque converter pressure Irom rising
The pCM controls the shift solenoid valves ON-and OFF. The shift valve intercepts
line pressure from the ATF pump
via the manual valve when the shift solenoid valve is OFF. When the shift solenoid
valve is turned ON' line pressure
changes to shift solenoid vaive pressu re at the shift solenoid valve, then the solenoid
valve pressure flows to the shift
valvel Applying strift solenoid pressure to the shift valves moves the
position of the shift valve, and switches the port
oitn" nydr"utii circuit. The PCM also controls A7T clutch pressure control
solenoid valves A, B, and C The A/T clutch
pressure control solenoid vatves regulate hydraulic pressure, and apply the
pressure to the clutches for engaging
!mooiniV. fne cfut"h". ur" ,"""iu"i optimum clutch pressure which
is regulated by the A/T clutch pressure control
solenoid valves for comlortable driving and shifting under all conditions'
POBT
N 0 .
DESCRIPTION OF PRESSURE
PORT
NO.
DESCRIPTION OF PRESSURE
SHIFT SOLENOID VALVE B
LIN E
5 E
3 LINE
SHIFT SOLENOID VALVE C
LINE
S D
qHIFT SOI FNOID VALVE D
SHIFT SOLENOID VALVE E
LINE
S E
L I N E
1 0 1ST CLUTCH
I l t \ t E
20 2ND CLU I CH
L I N E
30
3RD CLUTCH
1A
G
LINE or A/I CLUTCH PRESSURE
CONTROL
S.|I FNOID VAI VE A
40
4TH CLUTCH
6il at t tTcx
LINE
50
LIN E
55
A,rT CLU tCH PHtSSUfiE LUt\ | rlul )u!E!lll!g_!11!t!^
3 B LINE
55'
Ma-Lr.lrcH
pREssrrBE
coNIBq!!9!EN9!q
yAlyE A
3C
LIN E
56
P"T CI-WCN PNTSSURE
CONTROL SOLENOID VALVE B
5A
L I N E
57
Arr--CLIJTCHPRESSIJREcaIIBq!!9!E!q!q-YA!YE
5 B
L I N E
90 TORQUI UUNVEI{ IEr{
5C
LIN E
9'r
TORQUE UUNVTT{ I EH
5D
LINE
92
TOROI IF CONVERTER
ATF COOLER
TOROUE CONVERTER
LUBRICATION
TOROTJE
CONVERTER
TOROUE CO'\'VERTER
SUCTION
DRAIN
HICH POSITION DRIilN
AIR DRAIN
5 E
LINE or ptrr CLUTCH PRESSURE CONTROL
C N I E N I N I N \ / A I V F R
93
5 F
-rne
or afi crutcH PRESSURE
coNTRoL
SOLENOID
VALVE A or B
9 4
A,/T CLUTCH PRESSURE CONTROL
SOLENOID VALVE B
5 H
M crurcs eRessuRE
coNTRoL
enr FNrntn \/Al vF c
9 6
5J
AT CLUTCH PRESSURE CONTROL
S O L E N O I D
V A L V E C
-
91
5K
A,/T CLUTCH PRESSURE CONTROL
C N I F N O I D V A I V E C
99
5 L
MT CLUTCH PRESSU RE CONTROL
q N I F N O I N V A I V E C
X
5 N
err crurcu pnessuRE coNTRoL
q N I F N O I D V A I V E C
HX
SA
SHIFT SOLENOID VALVE A
AX
(cont'd)
14-47