Mazda 2004 RX-8, Особенности сервиса

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AUTOMATIC TRANSMISSION
05–13–10
Electronic Control Item and Contents
Component Description (Electronic Control)
*1
: There are two throttle opening angle signals. One is based on the accelerator pedal opening angle and the
other is based on the throttle valve opening angle.
End Of Sie
Control Item Contents
Shift control
•
Detects engine load and vehicle speed, and switches to optimum gear in accordance
with preset shift program
Line pressure control
•
Switches between high and low line pressure to suit engine load and vehicle speed,
according to on/off pressure control valve solenoid
Direct electronic shift control
•
Regulates clutch pressure to suit engine load and driving conditions, according to
duty cycle solenoids (shift solenoids A, B, C, F) and amplifier valve of clutches, and
electronically controls clutch engagement and release directly
Feedback control
•
Performs real-time feedback correction for clutch engagement pressure to achieve
target shifts
•
Corrects clutch engagement pressure and timing on drain side to compensate for
changes in engine performance and changes in transmission
Engine-transmission total control
•
Optimally controls engine output torque when shifting
•
Operates optimal clutch engagement pressure corresponding to engine output
torque
TCC control
•
Controls TCC smoothly by duty cycle TCC solenoid, in accordance with designated
TCC points
Slope mode control
•
Changes the shift point to prevent frequent shifting up/down when climbing hills
OBD system
•
Parts essential for EC-AT control have a self-diagnosis function, which, in the event
of trouble, illuminates the AT warning light to warn the driver, and stores the DTC in
the TCM
•
If it is determined by self-diagnosis that trouble has occurred, the system performs
controls to maintain drivability
Part name Function
Input system VSS
•
Detects output shaft revolution speed
Turbine sensor
•
Detects reverse and high clutch drum (input) revolution
speed
TR switch
•
Detects selector lever ranges/positions
M range switch
•
Selects driving modes (M range) and changes driving
patterns
TFT sensor
•
Detects ATF temperature
Oil pressure switch B
•
Detects pressure applied to 2-4 brake
Oil pressure switch C
•
Detects pressure applied to high clutch
Oil pressure switch F
•
Detects pressure applied to low and reverse brake
Brake switch
•
Detects the brake pedal depressed
CAN
communication
Throttle opening signal
*1
•
Input throttle opening angle from PCM
Engine speed signal
•
Input engine speed signal from PCM
Engine torque signal
•
Input engine torque signal from PCM
Cruise control signal
•
Detects cruise control is in use
Engine coolant
temperature signal
•
Input engine coolant temperature signal from PCM
Output system ON/OFF type Pressure control solenoid
•
Switches line pressure between high and low
Duty type
Shift solenoid A
•
Controls amplifier valve to regulate low clutch pressure
Shift solenoid B
•
Controls amplifier valve to regulate 2-4 brake pressure
Shift solenoid C
•
Controls amplifier valve to regulate high clutch pressure
Shift solenoid F
•
Controls amplifier valve to regulate low and reverse brake
pressure
TCC solenoid
•
Controls TCC engagement and disengagement
CAN
communication
AT warning light
•
Illuminates when failure is detected by diagnosis function
Reduce torque signal
•
Sends signals to the PCM during shifting
Range signal
•
Illuminates to selector indicator light
Turbine speed signal
•
Output turbine speed signal to PCM