Honda ACCORD HYBRID 2005 Service Manual page 889

Hydraulic Flow
Distribution of Hydraulic Pressure
As the engine turns, the ATF p u m p starts to operate, and the auxiliary transmission fluid p u m p operates during auto
idle stop. A u t o m a t i c transmission fluid (ATF) is d r a w n t h r o u g h the ATF strainer (filter) and discharged into the
hydraulic circuit. Then, ATF f l o w i n g f r o m the ATF p u m p becomes line pressure that's regulated by the regulator valve.
Torque converter pressure f r o m the regulator valve enters the torque converter t h r o u g h the lock-up shift valve and
lock-up control valve, and it is discharged f r o m the torque converter. The torque converter check valve prevents
torque converter pressure f r o m rising.
The PCM controls the shift solenoid valves A, B, C, and D ON and OFF, and the shift solenoid valves control shift
solenoid pressure to the shift valves. A p p l y i n g shift solenoid pressure to the shift valves moves the position of the
shift valve, and switches the port of hydraulic pressure. The PCM also controls A/T clutch pressure control solenoid
valves A, B, and C. The A/T clutch pressure control solenoid valves regulate the A/T clutch pressure control solenoid
valve pressure and apply A/T clutch pressure control solenoid valve pressure to CPC valves A, B, and C.
W h e n shifting between gears, the clutch is engaged by pressure f r o m the CPC pressure mode. The PCM controls one
of the shift solenoid valves to m o v e the position of the shift valve. This m o v e m e n t switches the port of CPC pressure
and line pressure. Line pressure is then applied to the clutch, and CPC pressure is released. Engaging the clutch w i t h
line pressure m o d e happens w h e n shifting is completed.
Hydraulic pressure at the ports:
Port No. Hydraulic Pressure Port No. Hydraulic Pressure Port No. Hydraulic Pressure
1 LINE 5G CPCC 51 5TH CLUTCH
2 LINE 5H CPCB or LINE 56 A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE A
3 LINE 5J CPCB or LINE 57 A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE B
3' LINE 5K CPC A or LINE 5R A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE B
3 " REVERSE CPC or LINE 5L CPC A or LINE 58 A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE C
3A LINE 5M LINE
90
TORQUE CONVERTER
3B REVERSE CPC 5N CPCC 90' TORQUE CONVERTER
4
LINE 6 MODULATOR 91
TORQUE CONVERTER
4'
LINE SA SHIFT SOLENOID VALVE
A
9 1 ' TORQUE CONVERTER
4 " LINE SB SHIFT SOLENOID VALVE
B
92 TORQUE CONVERTER
4A CPC A SC SHIFT SOLENOID VALVE
C
93 ATF COOLER
4B
CPCB S C
SHIFT SOLENOID VALVE
C
94 TORQUE CONVERTER
4C CPCC SD SHIFT SOLENOID VALVE
D
95
LUBRICATION
5A CPC A 10 1ST CLUTCH 95' LUBRICATION
5B CPC A or LINE 15 1ST-HOLD CLUTCH 96 TORQUE CONVERTER
5C CPC B or LINE 20 2ND CLUTCH 99 SUCTION
5D CPC B 30
3RD CLUTCH X DRAIN
5E CPCC 40 4TH CLUTCH
HX HIGH POSITION DRAIN
5F
CPCC
50 5TH CLUTCH A X AIR DRAIN
(cont'd)
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