Honda ACCORD HYBRID 2005 Service Manual page 876

Automatic Transmission
S y s t e m D e s c r i p t i o n ( c o n t ' d )
Electronic Control System (cont'd)
Shift Control - Grade Logic Control
Also, the grade logic control system has been adopted to control shifting in the D and D3 positions. The PCM
compares actual driving conditions w i t h memorized driving conditions, based on the input f r o m the throttle position
sensor, the engine coolant temperature sensor, the barometric pressure sensor, the brake pedal position switch signal,
and the shift lever position signal, to control shifting w h i l e the vehicle is ascending or descending a slope.
Engine RPM Signal
Transmission Range
Switch Signal
Accelerator Pedal
Position Sensor
Signal
Throttle Position
Sensor Signal (DBW)
Output Shaft
(Countershaft)
Speed Sensor Signal
Input Shaft
(Mainshaft)
Speed Sensor Signal
ATF Temperature
Sensor Signal
Barometric Pressure
Sensor Signal
a .
Engine Coolant
Temperature
Sensor Signal
Brake Pedal Position
Switch Signal
V S A Control
Unit Signal
IMA Motor Control
Module Signal
PCM
Actual
Driving
Shift Position
Engine RPM Control
Shift Position
Control
Fail-safe Control
Read of ATF
Temperature
Master Target of
Shifting Position
Correction of Data
Selection of
Shifting mode
Grade Logic Control
Calculation of
gradient
Correction of engine
coolant temperature
sensor signal data
Correction of cruise
control signal data
by Downshift
Request Signal
Comparison
with
Signals
Shift Solenoid Valve A
Shift Solenoid Valve B
Shift Solenoid Valve C
Shift Solenoid Valve D
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