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amxzzn00001671
TCM
id051300702500
Purpose/Function
Function Table
|
Control item |
Main control content |
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|---|---|---|---|---|
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Shift point control
|
Automatic shift control
(D range)
|
Driving mode
|
Normal mode
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• Mode selection during normal driving (without drive selection switch)
• Normal mode selected using drive selection (with drive selection switch)
• Performs automatic shift corresponding to vehicle speed and accelerator pedal depression amount
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SPORT mode
(with drive selection switch)
|
• SPORT mode selected using drive selection
• Performs automatic shifting corresponding to vehicle speed and accelerator pedal depression amount
• Lower gear is selected than while in the Normal mode
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Active Adaptive Shift (AAS) mode
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• Unnecessary shift up is suppressed for several seconds by maintaining the gear corresponding to the operation speed at which the accelerator pedal is released
• The optimum gear on the low vehicle-speed side is selected and shift down is executed corresponding to the operation force at which the brake pedal is depressed
• During cornering, shift up is suppressed in preparation for acceleration after cornering
• In regions of high elevation, the optimum gear is selected corresponding to the environment
• The slope is estimated in the TCM to select the appropriate gear for ascent and descent
• When SPORT mode is selected, the AAS selects a lower gear compared to when normal mode is selected, and maintains it for a longer period of time (with drive selection switch)
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Direct mode control
(D range)
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• Direct mode control enables temporary use of manual shifting using the steering shift switch even when the selector lever is in the D range
• After switching to direct mode, the system returns to automatic shift mode automatically in accordance with driving conditions
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Manual shift control
(M range)
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• When M range is selected, manual shifting is prioritized according to the driver’s shift up/shift down operation
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Shift pressure control
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Line pressure control
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• Controls line pressure with high accuracy and fine control corresponding to engine load conditions and vehicle driving conditions
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Learning control
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• Learns engine performance changes and transmission deterioration over time to optimally correct clutch engagement pressure
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Torque converter clutch (TCC) control, slip control
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• By gradually engaging/disengaging TCC piston, shock during operation is reduced
• Implements TCC control when accelerator pedal is fully closed for improved fuel economy and emission performance
• Slip control, by sliding the TCC when TCC is in the off range, extends the TCC range to low vehicle speeds.
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i-stop control
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• When i-stop (engine-stop control) permit conditions are met and engine is stopped, TCM sends electric AT oil pump drive signal to the electric AT oil pump driver control unit
• Monitors the condition of the electric AT oil pump according to the electric AT oil pump operating condition signal from electric AT oil pump driver control unit
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Engine-transmission integration control
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• Optimally controls engine output torque when shifting
• Calculates optimum clutch engagement pressure according to engine output torque
|
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On-board diagnostic system
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• Main part of transmission control includes self-diagnosis function. In case of malfunction, automatic transmission warning light illuminates to alert driver, and DTC is stored in TCM
• When transmission malfunction is determined resulting from on-board diagnostic test, system control is switched to prevent any dangerous situation while driving
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Construction
Block diagram
amxzzn00001671
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System wiring diagram
amxzzw00004232
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Operation
Input/Output signal and related controls
|
Component |
Control |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Automatic shift control (D position) |
Direct mode control (D range) |
Manual shift control (M position) |
Neutral control |
Reverse control |
Line pressure control |
Learning control |
Torque converter clutch (TCC) control, slip control |
Engine-transmission integration control |
i-stop control |
On-board diagnostic system |
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|
Input
|
VSS
|
X
|
X
|
X
|
X
|
X
|
X
|
|
X
|
|
X
|
X
|
|
|
Turbine sensor
|
X
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
X
|
||
|
TR switch
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
X
|
|
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|
TFT sensor
|
X
|
|
X
|
|
X
|
|
X
|
|
X
|
|
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|
CAN
|
M position switch
|
|
|
X
|
|
X
|
|
|
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|
Up switch
|
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|
X
|
|
X
|
|
|
|
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Down switch
|
|
|
X
|
|
X
|
|
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Steering shift switch
|
|
X
|
X
|
|
X
|
|
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Brake switch
|
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|
X
|
|
X
|
|
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Throttle opening signal (APP sensor)
|
X
|
X
|
X
|
X
|
|
X
|
|
|
X
|
|
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Engine speed signal (Eccentric shaft position sensor)
|
|
X
|
|
|
X
|
X
|
X
|
X
|
X
|
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Engine torque signal (MAF sensor)
|
|
|
|
|
X
|
X
|
|
X
|
X
|
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Engine coolant temperature signal (ECT sensor)
|
X
|
|
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|
|
X
|
|
X
|
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Drive selection signal
|
X
|
|
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|
X
|
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Wheel speed signal (wheel speed sensor)
|
X
|
X
|
|
X
|
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Output
|
ON/OFF type
|
Shift solenoid A
|
X
|
X
|
X
|
|
X
|
|
|
X
|
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Shift solenoid B
|
X
|
X
|
X
|
X
|
|
X
|
|
|
X
|
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Shift solenoid C
|
X
|
X
|
X
|
X
|
|
X
|
|
|
X
|
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Shift solenoid D
|
X
|
X
|
X
|
|
X
|
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|
X
|
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Shift solenoid E
|
X
|
X
|
X
|
X
|
X
|
|
X
|
|
|
X
|
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|
Linear type
|
Line pressure control solenoid
|
X
|
X
|
X
|
X
|
X
|
|
|
X
|
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|
TCC control solenoid
|
|
|
|
|
|
X
|
|
X
|
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Shift solenoid F
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
X
|
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|
Shift solenoid G
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
X
|
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|
CAN
|
AT warning light
|
X
|
|
X
|
|
|
|
|
X
|
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Torque reduction request signal
|
|
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|
X
|
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Speedometer signal
|
|
|
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Electric AT oil pump driver control unit
|
|
|
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|
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|
|
X
|
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