Automatic Transmission - Mazda RX-8 2004 Service Highlights

05–13

AUTOMATIC TRANSMISSION

AUTOMATIC TRANSMISSION
OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . 05–13–2
Outline of operation . . . . . . . . . . . . . . . 05–13–2
Powertrain system . . . . . . . . . . . . . . . . 05–13–2
Hydraulic control system . . . . . . . . . . . 05–13–2
Electronic control system . . . . . . . . . . . 05–13–3
AUTOMATIC TRANSMISSION
CROSS-SECTIONAL VIEW . . . . . . . . . 05–13–5
AUTOMATIC TRANSMISSION
ELECTRONIC CONTROL SYSTEM
STRUCTURAL VIEW . . . . . . . . . . . . . . 05–13–6
Outline . . . . . . . . . . . . . . . . . . . . . . . . . 05–13–6
Structure . . . . . . . . . . . . . . . . . . . . . . . 05–13–7
AUTOMATIC TRANSMISSION
CONTROL SYSTEM WIRING
DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . 05–13–8
AUTOMATIC TRANSMISSION
BLOCK DIAGRAM . . . . . . . . . . . . . . . . 05–13–9
Electronic Control Item and
Contents. . . . . . . . . . . . . . . . . . . . . . . 05–13–10
Component Description
(Electronic Control) . . . . . . . . . . . . . . 05–13–10
AUTOMATIC TRANSMISSION DEVICE
RELATIONSHIP CHART. . . . . . . . . . . . 05–13–11
POWERTRAIN OUTLINE . . . . . . . . . . . . 05–13–12
POWERTRAIN OPERATION . . . . . . . . . 05–13–12
Power flow . . . . . . . . . . . . . . . . . . . . . . 05–13–13
TORQUE CONVERTER OUTLINE . . . . . 05–13–21
OIL PUMP FUNCTION . . . . . . . . . . . . . . 05–13–21
OIL PUMP
CONSTRUCTION/OPERATION . . . . . . 05–13–22
CENTRIFUGAL BALANCE CLUTCH
FUNCTION . . . . . . . . . . . . . . . . . . . . . . 05–13–22
CENTRIFUGAL BALANCE CLUTCH
CONSTRUCTION/OPERATION . . . . . . 05–13–23
Construction. . . . . . . . . . . . . . . . . . . . . 05–13–23
Operation . . . . . . . . . . . . . . . . . . . . . . . 05–13–23
CONTROL VALVE BODY
STRUCTURE . . . . . . . . . . . . . . . . . . . . . 05–13–24
Features. . . . . . . . . . . . . . . . . . . . . . . . 05–13–24
Construction. . . . . . . . . . . . . . . . . . . . . 05–13–24
CONTROL VALVE BODY
STRUCTURAL VIEW . . . . . . . . . . . . . . 05–13–25
TRANSMISSION FLUID TEMPERATURE
(TFT) SENSOR FUNCTION . . . . . . . . . 05–13–26
TRANSMISSION FLUID
TEMPERATURE (TFT) SENSOR
CONSTRUCTION/OPERATION . . . . . . 05–13–26
TURBINE SENSOR FUNCTION . . . . . . . 05–13–26
TURBINE SENSOR
CONSTRUCTION/OPERATION . . . . . . 05–13–27
VEHICLE SPEED SENSOR (VSS)
FUNCTION . . . . . . . . . . . . . . . . . . . . . . 05–13–27
VEHICLE SPEED SENSOR (VSS)
CONSTRUCTION/OPERATION . . . . . . 05–13–27
SOLENOID VALVE FUNCTION . . . . . . . 05–13–28
SOLENOID VALVE CONSTRUCTION/
OPERATION . . . . . . . . . . . . . . . . . . . . . 05–13–29
Construction. . . . . . . . . . . . . . . . . . . . . 05–13–29
Operation . . . . . . . . . . . . . . . . . . . . . . . 05–13–29
OIL PRESSURE SWITCH
FUNCTION . . . . . . . . . . . . . . . . . . . . . . 05–13–30
AUTOMATIC TRANSMISSION
OIL PRESSURE SWITCH
CONSTRUCTION/OPERATION . . . . . . . 05–13–31
CONTROLLER AREA NETWORK (CAN)
OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . 05–13–31
CONTROLLER AREA NETWORK (CAN)
CONSTRUCTION/OPERATION . . . . . . . 05–13–31
TRANSMISSION CONTROL
MODULE (TCM) OUTLINE. . . . . . . . . . . 05–13–31
SHIFT CONTROL STRUCTURE . . . . . . . 05–13–31
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–31
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–32
SHIFT CONTROL OPERATION. . . . . . . . 05–13–32
Range determination. . . . . . . . . . . . . . . 05–13–32
DRIVE MODE DETERMINATION
OPERATION . . . . . . . . . . . . . . . . . . . . . . 05–13–32
LINE PRESSURE CONTROL
STRUCTURE . . . . . . . . . . . . . . . . . . . . . 05–13–33
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–33
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–33
LINE PRESSURE CONTROL
OPERATION . . . . . . . . . . . . . . . . . . . . . . 05–13–34
DIRECT ELECTRONIC SHIFT
CONTROL STRUCTURE . . . . . . . . . . . . 05–13–35
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–35
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–35
DIRECT ELECTRONIC SHIFT
CONTROL OPERATION . . . . . . . . . . . . 05–13–36
AT WARNING LIGHT FUNCTION . . . . . . 05–13–37
AT WARNING LIGHT
CONSTRUCTION/OPERATION . . . . . . . 05–13–37
SELECTOR INDICATOR
LIGHT FUNCTION . . . . . . . . . . . . . . . . . 05–13–37
SELECTOR INDICATOR LIGHT
CONSTRUCTION/OPERATION . . . . . . . 05–13–37
Construction . . . . . . . . . . . . . . . . . . . . . 05–13–37
Construction . . . . . . . . . . . . . . . . . . . . . 05–13–38
MANUAL MODE SHIFT
CONTROL STRUCTURE . . . . . . . . . . . . 05–13–38
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–38
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–39
MANUAL MODE SHIFT
CONTROL OPERATION . . . . . . . . . . . . 05–13–39
Manual mode shift. . . . . . . . . . . . . . . . . 05–13–39
FEEDBACK CONTROL STRUCTURE . . 05–13–41
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–41
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–41
FEEDBACK CONTROL OPERATION . . . 05–13–42
Upshift clutch engagement
Upshift timing feedback
ENGINE-TRANSMISSION TOTAL
CONTROL OUTLINE . . . . . . . . . . . . . . . 05–13–42
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–42
Operation . . . . . . . . . . . . . . . . . . . . . . . 05–13–42
TORQUE CONVERTER CLUTCH (TCC)
CONTROL STRUCTURE . . . . . . . . . . . . 05–13–43
Features . . . . . . . . . . . . . . . . . . . . . . . . 05–13–43
Structure . . . . . . . . . . . . . . . . . . . . . . . . 05–13–43
TORQUE CONVERTER CLUTCH (TCC)
OPERATION . . . . . . . . . . . . . . . . . . . . . . 05–13–44
TCC release . . . . . . . . . . . . . . . . . . . . . 05–13–44
pressure feedback. . . . . . . . . . . . . . . . 05–13–42
(release-side clutch pressure). . . . . . . 05–13–42
05–13
05–13–1