Honda 2004 Odyssey Service Manual page 894

Clutch Pressure Control
The PCM actuates the A/T clutch pressure control solenoid valves A, B, and C to control the clutch pressure. When
shifting between lower and higher gears, the clutch pressure regulated by the A/T clutch pressure control solenoid
valves A, B, and C engages and disengages the clutch smoothly.
The PCM receives input signals from the various sensors and switches, performs processing data, and outputs a
current to the A/T clutch pressure control solenoid valves A, B, and C.
Input Shaft (Mainshaft)
Speed Sensor Signal
Output Shaft (Countershaft)
Speed Sensor Signal
Throttle Position
Sensor Signal
Manifold Absolute
Pressure Sensor Signal
Engine RPM Signal
Barometric Pressure
Sensor Signal
3rd Clutch Transmission
Fluid Pressure Switch
Signal
4th Clutch Transmission
Fluid Pressure Switch
Signal
Engine Coolant
Temperature
Sensor Signal
ATF Temperature
Sensor Signal
PCM
Actual
Driving
Shift
Position
Decision of
shifting mode
Master Target of
Controlling Current
Correction of Data
Correction of engine
torque signal data
Correction of
hydraulic pressure
application timing
Correction of engine
coolant temperature
sensor signal data
Correction of ATF
temperature sensor
data
Requirement to
retard ignition
timing
PGM-FI Control
System
A/T Clutch Pressure
Current
Control Solenoid
feedback
Valves A, B, and C
(cont'd)
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