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