Mazda RX-8. Manual — part 15
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AUTOMATIC TRANSMISSION [SJ6A-EL]
05–13–19
05–13
CONTROL VALVE BODY COMPONENT OUTLINE [SJ6A-EL]
EHU051321100101
•
The control valve body supplys oil by switching the oil circuit for the hydraulic pressure generated by the oil
pump. Based on the control signal from the TCM, the solenoid valves are activated to control the hydraulic
pressure to the clutch and brakes, performing gear shift and TCC. In addition, an appropriate amount of oil is
supplied to the torque converter, planetary gears and lubricating parts.
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TCM
CONTROL VALVE BODY COMPONENT
OIL PAN
SIGNAL
OIL PUMP
RETURN
SEND
ATF
GENERATES HYDRAULIC PRESSURE
OIL PUMP
PRESSURE
SHIFT SOLENOID A, B, C, D,
E, F, G
CLUTCHES,
BRAKES
OPERATE
PRESSURE
TORQUE
CONVERTER
SEND ATF
OIL COOLER
RETURN
LUBRICATION
RETURN
PLANETARY
GEAR
LINE PRESSURE
CONTROL SOLENOID
TCC CONTROL SOLENOID
REGULATOR VALVE
MODULATOR VALVE
SHIFT VALVES,
CONTROL
VALVES
ASSURES OPERATION
HYDRAULIC PRESSURE
E5U513ZS5013
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AUTOMATIC TRANSMISSION [SJ6A-EL]
05–13–20
ELECTRONIC CONTROL SYSTEM CONSTRUCTION [SJ6A-EL]
EHU051318901101
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ECCENTRIC SHAFT
POSITION SENSOR
MAF SENSOR
ECT SENSOR
PCM
TCM
BRAKE SWITCH
APP SENSOR
TURBINE SENSOR
VSS
TR SWITCH
TFT SENSOR
SHIFT
SOLENOID C
SHIFT
SOLENOID B
SHIFT
SOLENOID D
SHIFT
SOLENOID A
SHIFT
SOLENOID E
LINE PRESSURE
CONTROL SOLENOID
SHIFT
SOLENOID F
SHIFT
SOLENOID G
TCC CONTROL
SOLENOID
SELECTOR INDICATOR LIGHT
AT WARNING
LIGHT
GEAR POSITION
INDICATOR LIGHT
SELECTOR LEVER COMPONENT
·
M RANGE SWITCH
·
UP SWITCH
·
DOWN SWITCH
STEERING SHIFT SWITCH
(DOWN SWITCH)
STEERING SHIFT SWITCH
(UP SWITCH)
EHU513BS8002
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AUTOMATIC TRANSMISSION [SJ6A-EL]
05–13–21
05–13
ELECTRONIC CONTROL SYSTEM BLOCK DIAGRAM [SJ6A-EL]
EHU051318901102
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ELECTRONIC CONTROL ITEMS AND CONTENTS [SJ6A-EL]
EHU051318901103
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TCM
PCM
CAN
CAN
TRANSMISSION
CONTROL
SYSTEM
TURBINE
SENSOR
TR SWITCH
TFT SENSOR
VSS
INPUT SIGNALS
CONTROL VALVE
BODY COMPONENT
OUTPUT SIGNALS
GEAR POSITION
INDICATOR LIGHT
AT WARNING LIGHT
SELECTOR
INDICATOR LIGHT
SHIFT SOLENOID
A, B, C, D, E, F, G
LINE PRESSURE
CONTROL SOLENOID
TCC CONTROL
SOLENOID
INSTRUMENT CLUSTER
BRAKE SWITCH
MAF SENSOR
APP SENSOR
OTHER MODULE
UP SWITCH
DOWN SWITCH
M RANGE
SWITCH
ON-BOARD
DIAGNOSTIC
SYSTEM
INPUT SIGNALS
DLC-2
OUTPUT SIGNALS
CAN
INPUT SIGNALS
ECCENTRIC SHAFT
POSITION SENSOR
ECT SENSOR
ENGINE TORQUE
SIGNAL
ENGINE TORQUE
CONTROL SIGNAL
OUTPUT SIGNALS
INPUT SIGNALS
TFT CHECK CONNECTOR
EHU513BS8003
Item
Content
Shift control
•
Detects engine load and vehicle speed, and switches to optimum gear in accordance
with preset shift program.
•
In D range, automatically switches between NORMAL, AAS, DOWN-SLOPE, UP-
SLOPE modes according to specific conditions.
Manual mode shift control
•
Shifts to selected gear position by manual shifting of the selector lever forward and
back.
•
The up/down operation of the steering shift switch is the same as the manual operation
of the selector lever.
TCC control
•
According to preset TCC point, performs TCC operation.
Torque reduction control
•
Optimally controls engine output torque when shifting.
Shift learning control
•
Performs optimal correction for clutch engagement pressure to reduce changes in
engine performance and/or elapsed transmission.
On-board diagnostic system
•
Detects and/or memorizes failure of input/output part and transmission condition.
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AUTOMATIC TRANSMISSION [SJ6A-EL]
05–13–22
COMPONENT DESCRIPTIONS (ELECTRONIC CONTROL) [SJ6A-EL]
EHU051318901104
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Part name
Function
Input system
VSS
•
Detects parking gear (output) revolution speed.
Turbine sensor
•
Detects direct and reverse disc clutch case (input) revolution
speed.
TR switch
•
Detects selector lever ranges/positions.
M range switch
•
Selects driving modes (M range) and changes driving
patterns.
Up switch
•
Detects shift up request.
Down switch
•
Detects shift down request.
TFT sensor
•
Detects ATF temperature.
CAN
communication
Brake switch
•
Detects the brake pedal depressed.
Throttle opening signal
(APP sensor)
•
Input throttle opening angle from PCM.
Engine speed signal
(Eccentric shaft position
sensor)
•
Input engine speed signal from PCM.
Engine torque signal
(MAF sensor)
•
Input engine torque signal from PCM.
Cruise control signal
•
Detects cruise control is in use.
Engine coolant
temperature signal
(ECT sensor)
•
Input engine coolant temperature signal from PCM.
Output system
ON/OFF type
Shift solenoid A
•
Controls the clutch engagement pressure.
Shift solenoid B
•
Controls the clutch engagement pressure.
Shift solenoid C
•
Controls the clutch engagement pressure.
Shift solenoid D
•
Controls the clutch engagement pressure.
Shift solenoid E
•
Controls the clutch engagement pressure.
Linear type
Line pressure control
solenoid
•
Adjusts the line pressure.
TCC control solenoid
•
Controls the TCC hydraulic pressure.
Shift solenoid F
•
Controls the clutch engagement pressure.
Shift solenoid G
•
Controls the clutch engagement pressure.
CAN
communication
AT warning light
•
Illuminates when failure is detected by diagnosis function.
Speedometer signal
•
Outputs the vehicle speed signal to speedometer.
Reduce torque signal
•
Sends signals to the PCM during shifting.
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