Honda ACCORD HYBRID 2005 Service Manual page 897

D Position: Shifting between 3rd gear and 4th gear
As the speed of the vehicle reaches the p r o g r a m m e d value, the PCM turns shift solenoid valve C OFF, and shift
solenoid valve C uncovers the port of shift solenoid valve C pressure (SC) to the shift valve C. Shift solenoid valve A
keeps O N , and shift solenoid valve B keeps OFF. The shift valve C is m o v e d to the right side to switch the port of line
pressure (4) and CPC B pressure (4B) leading to the 3rd clutch. The shift valve C also uncovers the port of CPC A
pressure (4A) leading to the 4th clutch. The PCM controls A/T clutch pressure control solenoid valves A and B. A/T
clutch pressure control solenoid valve A pressure (56) is applied to the CPC valve A, and A/T clutch pressure control
solenoid valve B pressure (57) is applied to the CPC valve B. The CPC valve A regulates line pressure (4), and line
pressure (4) becomes CPC A pressure (4A). CPC A pressure (4A) f l o w s to the shift valve B via the shift valves C and A,
and becomes 4th clutch pressure (40) at the shift valve B. The 3rd clutch pressure (30) is changed to CPC pressure
m o d e , and the 4th clutch is engaged w i t h the CPC pressure m o d e . The 1st clutch is also engaged, but no p o w e r is
transmitted because of the one-way clutch.
NOTE: W h e n used, " l e f t " or " r i g h t " indicates direction on the hydraulic circuit.
1ST CLUTCH/
1ST 1ST-HOLD CLUTCH 2ND
ACCUMULATOR
^ i i i
r—-i ACC
2ND 2ND CLUTCH 2ND 3RD CLUTCH ^RD
ACCUMULATOR TRANSMISSION g g r C H TRANSMfSSIONCLUTCH
4TH CLUTCH 5 T H *TH
TRANSMISSION CLUTCH CLUTCH
SHIFT Suttniuiu
VALVE D: OFF (CLOSE)
or ON (OPEN) =
, SHIFT SOLENOID
I VALVE B:
OFF (OPEN)
. SHIFT SOLENOID
1 VALVE C.
r OFF (OPEN)
SHIFT SOLENOID
3 VALVE A:
ON (OPEN)
SOLENOID
VALVE C
f
a SOLENOID
VALVE B
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
(cont'd)
14-61