1994 HONDA INTEGRA Workshop Manual

2nd Sgeed
The llow of fluid up the 1-2 shift valve is the same as in 1st speed. As the speed of the car reaches the prescribed
value, the solenoid valve A is tulned on by means ot the TCM. As a result, the 1-2 shift valve is moved to the left
and uncovers the port leading to the 2nd clutch; the 2nd clutch is engaged'
Fluid flows by way of:- Line Dressure l4l - 'l-2 Shift Valve - 2-3 Shitt Valve - 2nd Clutch Pressure (2'1) * 2nd Clutch
The hvdraulic pressure also flows to the 1st clutch, However, no power is transmitted because of the one-way clutch.
NOTE:. When used, "lett" or "right" indicates direction on the flowchart
. SOL-@: Shift Control Solenoid Valve A
. SOL@: Shift Control Solenoid Valve B
. SOL-@: Lock-up Control Solenoid Valve A
. SOL-@: Lock-up Control Solenoid Valve B
{cont'd)
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Description
Hydraulic Flow (cont'd)
3rd Speed
The tlow of fluid up to the 1-2 and 2 3 shift valves is the same as in 2nd speed. As the speed of the car reaches
the prescribed value, the shift control solenoid valve B is turned off {shilt control solenoid valve A remains on). The
2-3 shift valve is then moved to the left, uncovering the oil port leading to the 3rd clutch. Since the 3-4 shitt valve
is moved to the right to cover the oil port to the 4th clutch, the 3rd clutch is turned on.
Fluid tlows by way of:- Line pressure l4l - 1-2 shift valve - 23 Shift Valve * 3rd ctutch pressure (31) - 3-4 shift valve(not controlled) 3rd Clutch Pressure (3O) - 3rd Clutch
The hydraulic pressure also flows to the l st clutch. However, no power is transmitted because of the one-way clutchas in the 2nd speed.
NOTE:. When used, "lett" o( " tight" indicates direction on the flowcharl.. SOL-@: Shift Control Solenoid Valve A. SOL-@:Shift Control Solenoid Valve B. SOL-O: Lock-up Control Solenoid Valve A. SOL-@: Lock-up Control Solenoid Valve B
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Lq4 Position
4. 4th Spe6d
The flow of tluid up to the 1-2, 2-3 and 3-4 shift valves is the same as in 3rd speed. As the speed of the car reaches
the prescribed value, the shift control solenoid valve A is turned oJt (shift control solenoid valve B remains off).
As this takes place, 3-4 shift valve is moved to the left and uncovers the oil port leading to the 4th clutch. Since
the 1-2 and 2-3 shift valves are kept on the left side, the fluid flows through the 4th clutch; the power is transmitted
through the 4th clutch.
Fluid flows by way of:- Line Pressure l4l - 'l'2 Shift Valve -t 2-3 Shitt Valve - 3rd Clutch Pressure (31) - 3-4 Shift Valve
4th Clutch pressure (41) - Manual Valve 4th Clutch Pressure {4O) - 4th Clutch
The hvdraulic pressure also tlows to the '1st clutch. However, no power is transmitted because of the one-way clutch
as in 2nd and 3rd soeed.
NOTE:. When used, "left" or "right" indicates direction on the flowchan.
. SOL-@: Shitt Control Solenoid Valve A
. SOL-@: Shift Control Solenoid Valve B
. SOL-O: Lock-up Control Solenoid Valve A
. SOL-@: Lock-up Conttol Solenoid Valve B
(cont'dl
14-35

Description
Hydraulic Flow (cont'd)
LEI Position
The flow ot fluid through the torque convener circuit is the same as in S position. The tluid ( 1 ) trom the oil pump flowsthrough the manual valve and becomes line pressure (31. lt then flows through the 1-2 shift valve to the servo varvevia the servo control valve, causing the shift tork shatt to be moved in the reverse direction.Under this condition, the shift control solenoid valve A is turned on whereas the valve B is turned ofJ as in 3rd speedin [Dil or lDs]l position. As a result, the 1-2 shift valve is also moved to the left. The ftuid (3'] will ftow through the ser-vo valve and manual valve to the 4th clutch; power is transmitted through the 4th clutch.
Reverse Inhibitor Control
When the @ position is selected while the vehicle is moving forward at a speed over 6 mph ( 1O km/h). the TCM outputs1st signal (A: OFF, B: ON), and the 1-2 shift valve is moved to the right side. The line pressure {3) is intercepted bvthe 1-2 shift valve; consequently, power is not transmitted as the 4th clutch and servo valve are not oDerareo.
NOTE:. When used, "lefl" ot "tight" indicates direction on the flowchart.. SOL-@: Shift Control Solenoid Valve A. SOL€: Shift Control Solenoid Valve B. SOL€: Lock-up Control Solenoid Vatve A. SOL-@: Lock-up Control Sotenoid Vatve B
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Lll Position
The flow of fluid through the torque converter circuit is the same as in I position. The line pressure ( l ) becomes line
pressure (3) as it passes through the manual valve. Then line pressure (3) flows through the 1-2 shift valve to the servo
valve via the servo control valve. causing the shift fork shaft to be moved to the reverse position as in E position.
However. the hydraulic pressure is not supplied to the clutches. Power is not transmitted.
NOTE:. When used, "left" or "right" indicates direction on the flowchart.
. SOL-@: Shitt Control Solenoid Valve A
. SOL-@: Shift Control Solenoid Valve B
. SOL-O: Lock-up Control Solenoid Valve A
. SOL-O: Lock-up Control Solenoid Valve B
14-37

Description
Lock-up System
Lock-up Clutch
1. Operation (clutch on)
With the lock-up clutch on, the oil in the chamber between the torque convener cover and lock-up piston is discharged,and the converter oil exerts pressure through the piston against the converter cover. As a result, the converter turbineis locked on the converter cover firmly. The etfect is to bypass the converter, thereby placing the car in direct drive.
tpowefJlo-wl
The power tlows by way of:
Engine
I
Drive plate
I
Torque convener cover
I
Lock-up piston
I
Damper spring
I
Turbine
t
Mainshaft
TOROUE CONVERTERCOVER
LOCK-UP
TURBINE
To oil cooler
2. Operation (clutch off)
With the lock-up clutch off, the oil tlows in the reverse of CLUTCH ON. As a result, the lock-up piston is moved away
from the converter cover; that is, the torque converter lock-up is released.
Fowtttowl
Engine
I
Drive plate
I
Torque converter cover
Pump
I
Turbine
I
Mainshaft
OUTLET
t
,\
TURBINE
14-38

In E position in 2nd, 3rd and 4th, and @ position in 3rd, pressurized fluid is drained from the back of the torque con-
verter through an oil passage, causing the lock-up piston to be held against the torque converter cover. As this takes
place, the mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the TCM op-
timized the timing ot the lock-up system. Under certain conditions, the lock-up clutch is applied during deceleration, in
3rd and 4th sDeed.
The lock-up system controls the range of lock-up according to lock-up control solenoid valves A and B, and throttle valve B.
When lock-up control solenoid valves A and B activate. modulator pressure changes. Lock-up control solenoid valves
A and B are mounted on the torque converter housing, and are controlled by the TCM.
NOTE:
When used, "left" or " tight" indicates direction on the tlowchart.
LOCK IJP COIITBOL
Solenoid valve
L""f."p "."aiti""\B
Lock-up OFFOFFOFF
Lock-up, slightONOFF
Lock-up, halfONON
Lock-up. fullONON
Lock-up
during decelerationONDuty operation
OFF -ON
LOCI( UP TIMII{G B VAIVE
{cont'd)
ott coot€R
14-39

Description
Lock-up System (cont'dl
No Lock-uo
The pressurized fluid regulated by the modulator works on both ends of the lock-up shift valve and on the left side ot
the lock-up control valve. Under this condition, the pressu.es working on both ends ol the lock-up shitt valve ate equal.
the shift valve is moved to the right side by the tension of the valve spring alone. The tluid from the oil pump will flow
through the left side of the lock-up clutch to the torque converter; i,e., the lock-up clutch is in OFF condition.
NOTE: When used. "left" or "right" indicates direction on the flowchart.
LOCK.UP CONTRO!
<- MOOULATOi PBfSSURE
LOCK.UP TIMI GAVALVE
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