03
Shift Control - Grade Logic Control
14-41
Transmission Range
Switch Signal
PCM
Brake Pedal Position
Switch Signal
Engine RPM
Control
Engine RPM Signal
Output Shaft
(Countershaft)
Speed Sensor Signal
Input Shaft
(Mainshaft)
Speed Sensor Signal
Engine Coolant
Temperature
Sensor Signal
Shift Position
Control
Fail-safe Control
Actual Driving
Shift Position
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
Shift Solenoid
Valve A
ATF Temperature
Sensor Signal
Comparison
with Signals
Accelerator Pedal
Position Sensor Signal
Throttle Position
Sensor Signal
Barometric Pressure
Sensor Signal
Shift Solenoid
Valve B
Shift Solenoid
Valve C
Shift Solenoid
Valve D
Shift Solenoid
Valve E
A grade logic control system has been adopted to control shifting in D, and in S with automatic shift mode. The PCM
compares actual driving conditions with programmed driving conditions, based on the input from the accelerator
pedal position sensor, the throttle position sensor, the engine coolant temperature sensor, the barometric pressure
sensor, the brake pedal position switch signal, the output shaft (countershaft) speed sensor signal, and the shift lever
position signal, to control shifting while the vehicle is ascending or descending a slope.
08/08/21 14:38:21 61SNR030_140_0043