Honda Civic Service Manual page 709

Description
Hydraulic Flow lcont'dl
4th Goar {E Position}
As the speed of the vehicle reaches the prescribed value, shift controlsolenoid valve A is turned OFF bymeans
ofthe
PCM Shift control solenoid valve B remains oFF. The modulator pressure (6) flows to the left
end of the t-2 shift
valve and the left end of the 3-4 shift valve. The modulator pressure (64) in the left end of the 1-2 shift
valve equals
the modulator pressure {68) in the right end of the 1-2 shift valve, the 1-2 shift valve remains at left
side by the ten-
sion of the valve spring.
The 3-4 shift valve is moved to the right side by the modulator pressure (64). The 3_4 shift valve
covers the port to the
3rd clutch and uncovers the port to the 4th clutch as this valve is moved to the right side. The 4th clutch pressure (4.1)
from the 3-4 shift valve becomes the 4th clutch pressure (40) at the manual valve. The 4th clutch pressure (401
is
applied to the 4th clutch, and the 4th clutch is engaged.
Fluid flows by way of:
- Line pressure (4) * CPB Valve - Line Pressure (5) + 1-2 Shift
Valve - Line pressure (5) * 2-3 Shift Valve
- Line Pressure (5) - 3-4 Shift Valve - 4th Clutch pressure (41) +
Manual Valve _ 4th Clutch pressure (40)
* 4th Clutch
The hydraulic pressure also flows to the lst clutch. However, no power is transmitted because of the
one-way crutch
as in 2nd and 3rd gear.
NOTE: When used, "|eft" or "right,, indicates direction on the hydraulic circuit.
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