Mazda RX-8. Manual — part 16

AUTOMATIC TRANSMISSION [SJ6A-EL]

05–13–23

05–13

INPUT/OUTPUT SIGNAL AND RELATED CONTROLS [SJ6A-EL]

EHU051318901105

X : Available

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Component

Control item

Shift

control

Manual

mode

shift

control

TCC

control

5-6 shift

inhibit

control

Torque

reduction

control

Line

pressure

control

Shift

learning

control

On-board

diagnostic

function

Input

VSS

X

X

X

X

X

Turbine sensor

X

X

X

X

X

X

X

TR switch

X

X

X

M range switch

X

X

Up switch

X

X

Down switch

X

X

TFT sensor

X

X

X

X

CAN
communication

Brake switch

X

Throttle opening
signal (APP sensor)

X

X

X

X

X

Engine speed signal
(Eccentric shaft
position sensor)

X

X

X

X

X

Engine torque signal
(MAF sensor)

X

X

X

X

Cruise control signal

X

Engine coolant
temperature signal
(ECT sensor)

X

X

X

X

Output

ON/OFF type

Shift solenoid A

X

X

X

X

Shift solenoid B

X

X

X

X

Shift solenoid C

X

X

X

X

Shift solenoid D

X

X

X

X

Shift solenoid E

X

X

X

X

Linear type

Line pressure control
solenoid

X

X

X

X

X

TCC control solenoid

X

X

Shift solenoid F

X

X

X

X

X

X

Shift solenoid G

X

X

X

X

X

X

CAN
communication

AT warning light

X

X

X

Reduce torque signal

X

Speedometer signal

AUTOMATIC TRANSMISSION [SJ6A-EL]

05–13–24

TRANSMISSION RANGE (TR) SWITCH FUNCTION [SJ6A-EL]

EHU051319200101

•

The TR switch sends information on which range is selected in the automatic transmission using a combination
of the position circuit terminals, and its functions are as follows:

1. Enables engine starting only in P or N positions
2. Used as shifting control signals

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A

B

H

D

F

G

E

C

I

E5U513ZS5023

Position/Range

Connector terminal

P

R

N

D

Starter

circuit

I

A

E

B

C

H

D

Position-circuit

: Continuity

Polarity

E5U513ZS5024

AUTOMATIC TRANSMISSION [SJ6A-EL]

05–13–25

05–13

TURBINE SENSOR, VEHICLE SPEED SENSOR (VSS) CONSTRUCTION/OPERATION [SJ6A-EL]

EHU051319200102

•

The turbine sensor detects the rotation speed of the direct and reverse disc clutch case, and sends it to the
TCM as a signal.

•

The VSS detects the rotation speed of the parking gear and sends it to the TCM as a signal.

•

A magnetic pick sensor which has high detection accuracy has been adopted for each sensor. When the rotor
rotates, air gap between the sensor and detection projections varies, magnetic flux which passes through the
sensor coil increases and decreases, and electromotive force is generated in the coil. This generated voltage is
shown as alternative current since the current direction while the projections are approaching the sensor is
reversed from that of when the projections are moving away from the sensor.

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18 (30

°

/360

°

)

24 (15

°

/360

°

)

DIRECT AND REVERSE DISC CLUTCH CASE

TURBINE SENSOR

VSS

VSS

PARKING GEAR

OUTPUT WAVE NUMBER PER

ONE ROTATION OF ROTOR

OUTPUT WAVE NUMBER PER

ONE ROTATION OF ROTOR

E5U513ZS5025

AUTOMATIC TRANSMISSION [SJ6A-EL]

05–13–26

TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR OUTLINE [SJ6A-EL]

EHU051319200103

•

The TFT sensor and the coupler component are equipped to the control valve body component as a single unit.

•

A hydraulic pressure sensor for hydraulic control during shifting has been equipped inside the control valve
body component.

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SHIFT SOLENOID A, B, C AND D OUTLINE [SJ6A-EL]

EHU051321101101

•

Shift solenoids A, B, C, and D are directly equipped to the control valve body component.

•

Shift solenoids A, B, C, and D turn on and off according to the control signals from the TCM, and change the
gear between 1st to 6th using a combination of each shift valve.

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TFT SENSOR

E5U513ZS5026

SHIFT SOLENOID C

SHIFT
SOLENOID B

SHIFT
SOLENOID D

SHIFT
SOLENOID A

E5U513ZS5027