Mazda 5. Manual — part 21

05–17–4

AUTOMATIC TRANSAXLE

End Of Sie

OUTLINE OF OPERATION

B3E051701030A04

• The operation of the electronic automatic transaxle is classified into three systems: the electronic control

mechanism, the hydraulic pressure control mechanism, and the powertrain mechanism (includes the torque
converter mechanism). The operation of each system is as follows:

— Electronic control mechanism

• According to the signals from the switches and sensors in the input system, the PCM outputs the signal

which matches the present driving condition to the linear type solenoid, ON/OFF type solenoids and the
duty-cycle type solenoids in the hydraulic pressure control mechanism.

— Hydraulic pressure control mechanism

• According to the signals from the PCM, each solenoid operates to switch the hydraulic passages in the

control valve body and controls the clutch engagement pressure.

• The line pressure is adjusted by the linear type pressure control solenoid. The hydraulic passages are

switched by the ON/OFF type solenoids (shift solenoids D and E.) And the clutch engagement pressure
is controlled by the duty-cycle type solenoids (shift solenoids A, B, and C).

— Powertrain mechanism

• The driving force from the engine is transmitted through the torque converter to the transaxle.

• The transmitted driving force operates each clutch and brake according to the clutch engagement

pressure from the duty-cycle type solenoid, and the planetary gears change the gear ratio to the
optimal driving force. The changed driving force is transmitted through the differential to the axle shaft
and then the tires.

.

9

8

7

5

4

3

10

17

16

14

15

13

11

12

6

1

2

19

20

23

21

22

23

PCM

18

B3E0517A015

1

Powertrain mechanism

2

Hydraulic pressure control mechanism

3

Electronic control mechanism

4

Torque converter

5

Clutches, brakes

6

Planetary gear

7

Differential

8

Control valve body

AUTOMATIC TRANSAXLE

05–17–5

05

End Of Sie

9

Shift solenoid D, E (ON/OFF type)

10

Pressure control solenoid (linear type)

11

Shift solenoid A, B, C (duty-cycle type)

12

Oil pump

13

Oil pressure switch signal (vehicles with oil pressure
switch)

14

Vehicle speed

15

ATF temperature

16

Forward clutch drum revolution speed

17

Engine revolution speed

18

Throttle position signal

19

Clutches, brakes engagement, release pressure

20

Power flow

21

Hydraulic pressure control signal

22

Electronic signal

23

Tire

05–17–6

AUTOMATIC TRANSAXLE

EC-AT OPERATION CHART

B3E051701030A05

4AT

Mode

Gear position

position/Rang

e

Shift pattern

Transaxle

Operation of shift solenoid

Solenoid valve

(duty-cycle type)

Shift

TCC

Re

ver

se c

lutc

h

Applied

Released

One-wa

y c

lutc

h

Lo

w and re

ver

se

brake

Shift

solenoid A

Shift

solenoid B

Shift

solenoid C

Shift

solenoid D

Shift

solenoid E

Engine brake

Forwar

d c

lutc

h

3

-

4 c

lutc

h

2-4

brake

band

Solenoid

valve (ON /

OFF type)

P

-

-

-

-

-

Reverse

1GR

2GR

2GR

1GR

2GR

1GR

1GR

2GR

2GR

3GR

3GR

3GR

4GR

4GR

TCC ON

-

-

-

-

-

-

-

-

-

2.648

OPEN

OPEN

OPEN

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

OFF

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

CLOSED

OPEN

OPEN

CLOSED

CLOSED

OPEN

OPEN

OPEN

OPEN

CLOSED

CLOSED

OPEN

OPEN

CLOSED

CLOSED

OPEN

CLOSED

OPEN

OPEN

OPEN

CLOSED

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

CLOSED

OPEN

OPEN

OPEN

CLOSED

OPEN

OPEN

CLOSED

OPEN

OPEN

OPEN

CLOSED

OPEN

OPEN

OPEN

OPEN

OPEN

CLOSED

OFF

OFF

OFF

OPEN

CLOSED

CLOSED

OPEN

OPEN

OPEN

OPEN

CLOSED

OPEN

OPEN

OPEN

OPEN

OPEN

CLOSED

CLOSED

ON

ON

ON

ON

2.816

1.497

1.000

0.725

0.725

1.497

1.000

1.000

1.000

1.000

1.000

0.725

0.725

0.725

0.725

0.725

2.816

2.816

2.816

1.497

1.497

1.497

1.497

-

-

R

N

D

S

L

2

*

4GR

3

*

4GR

3

*

3GR

3

*

3GR

3

*

4GR

3

*

4GR

3

*

2GR

3

*

3GR

3

*

4GR

3

*

1

*

POWER/

NORMAL

HOLD

HOLD

HOLD

Non-
HOLD

Non-
HOLD

: Automatically switches between POWER and NORMAL modes according to accelerator pedal depressing
speed.
: Performs TCC operation in NORMAL mode.
: To prevent engine overspeed inhibits downshift until the engine speed is reduced to the preset speed.
: Operating
: Transmits the torque only when driving.

OPEN: Engages the line pressure to the clutch pressure.
CLOSED: Drains the clutch pressure.
ON: Engages the output port and the supply port (Solenoid reducing pressure).
OFF: Engages the output port and the drain port (Drains the output port).

1

*

2

*

3

*

A6E5614T003

AUTOMATIC TRANSAXLE

05–17–7

05

Sport AT

End Of Sie

TORQUE CONVERTER OUTLINE

B3E051719100A01

• The torque converter clutch mechanism mechanically engages the pump impeller and the turbine runner under

a certain condition, and transmits the power, not through the fluid, but directly, preventing the slip loss of the
torque converter.

• The torque converter has obtained sufficient transaxle efficiency and torque converting ratio that matches the

output characteristic of each engine.

1

*

2

*

3

*

OPEN: Engages the line pressure to the clutch pressure (Solenoid de-energized).
CLOSE: Drains the clutch pressure (Solenoid energized).
ON: Engages the output port and the supply port (Solenoid reducing pressure).
OFF: Engages the output port and the drain port (Drains the output port).

: Automatic shift according to set speed and throttle opening angle
: Manual shift based on selector lever operation
: Consecutive shift by tapping selector lever two times in the down-shift ( ) direction or up-shift (+) direction
: Automatically switches between POWER and NORMAL modes according to accelerator pedal depressing
speed.
: Performs TCC operation in NORMAL mode.
: Indicates operation although the band servo remains deactivated due to the large area of the release pressure
side.
: Operating
: Transmits the torque only when driving.

Mode

Neutral

Neutral

2.648

2.816

1.497

1.000

0.725

0.725

2.816

1.497

1.000

0.725

0.725

1GR

2GR

3GR

4GR

Reverse

Gear position

Shift pattern

Transaxle

Operation of shift solenoid

Solenoid valve

(duty-cycle type)

2-4

brake

band

Solenoid

valve (ON /

OFF type)

P

osition/Rang

e

Shift

TCC

Engine brake

Re

ver

se c

lutc

h

One-wa

y c

lutc

h

Lo

w and re

ver

se

brake

Shift

solenoid A

Shift

solenoid B

Shift

solenoid C

Shift

solenoid D

Shift

solenoid E

3

-

4 c

lutc

h

Applied

Released

Forwar

d c

lutc

h

P

R

N

-

-

-

-

-

-

-

-

OPEN

-

-

OPEN

-

-

OPEN

OFF

OFF

OPEN

CLOSE

CLOSE

OFF

OFF

OPEN

OPEN

CLOSE

OPEN

OPEN

CLOSE

OPEN

OPEN

CLOSE

OFF

OFF

OPEN

OPEN

OPEN

OFF

OFF

OPEN

OPEN

OPEN

OFF

OFF

OPEN

OPEN

ON

OFF

OFF

OFF

CLOSE

OPEN

OPEN

ON

OFF

CLOSE

CLOSE

OPEN

OPEN

CLOSE

OPEN

OPEN

ON

ON

ON

ON

ON

ON

ON

OFF

ON

OFF

-

-

D

1

*

2

*

3

*

3

*

M

POWER/

NORMAL

4GR

TCC ON

1GR

2GR

3GR

4GR

4GR

TCC ON

MANUAL

B3E0517A016