Mazda 5. Manual — part 29

05–17–36

AUTOMATIC TRANSAXLE

SHIFT SOLENOID A, B AND C (DUTY-CYCLE TYPE) OUTLINE

B3E051721100A02

• The clutch pressure direct control, which supplies the clutch pressure directly to each clutches and/or brake, is

adopted. The three-way duty-cycle type solenoids with excellent controllability are adopted, to improve
response.

End Of Sie

SHIFT SOLENOID A, B AND C (DUTY-CYCLE TYPE) FUNCTION

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• The duty-cycle type shift solenoid adjusts the amount of output pressure according to the signal from the PCM,

and controls the pressure of each clutch.

• The duty-cycle type shift solenoid, which switches

ON/OFF at 50 Hz (20 ms cycle) and controls the
output pressure, is adopted. By changing the ON
time ratio a cycle (0—100 %), the solenoid
adjusts the time ratio of the OPEN (supply) and
CLOSE (drain), and maintains the clutch pressure
at the designated hydraulic pressure. As a result,
the clutch pressure rises when the duty ratio (50
Hz ON time ratio) is reduced, and falls when the
duty ratio is raised.

.

End Of Sie

SHIFT SOLENOID A, B AND C (DUTY-CYCLE TYPE) OPERATION

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OPEN:When the electrical current does not flow, the supply port (line pressure) in the solenoid opens and is

engaged with the output port (clutch pressure). As a result, hydraulic pressure is supplied to the hydraulic
passage for the clutch pressure.

CLOSE:When the electrical current flows, the supply port (line pressure) in the solenoid closes and the output port

(clutch pressure) and the drain port are engaged to drain the clutch pressure.

.

3

1

2

B3E0517T035

1

Output port (clutch pressure)

2

Supply port (line pressure)

3

Drain

5

4

3

1

2

3

B3E0517T036

1

Electrical current does not flow (OPEN)

2

Electrical current flows (CLOSE)

3

Output port (clutch pressure)

4

Supply port (line pressure)

5

Drain

AUTOMATIC TRANSAXLE

05–17–37

05

End Of Sie

SHIFT SOLENOID D, AND E (ON/OFF TYPE) OUTLINE

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• Compact, light-weight three-way solenoid are adopted for shift solenoids D and E to reduce consumption

discharge amount.

End Of Sie

SHIFT SOLENOID D, AND E (ON/OFF TYPE) FUNCTION

B3E051721100A06

• ON/OFF type solenoid valve switches the supply

drain of output port according to the electrical
current flow switching.

.

End Of Sie

SHIFT SOLENOID D, AND E (ON/OFF TYPE) OPERATION

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ON:When the electrical current flows, the output port and the supply port (solenoid reducing pressure) are

engaged in the solenoid, and the output pressure becomes equivalent to the solenoid reducing pressure.

OFF:When the electrical current does not flow, the output port and the drain port are engaged in the solenoid, and

the output pressure is drained.

.

Shift solenoid

Function

Shift solenoid D

Switches bypass valve and 3-4 shift valve

Shift solenoid E

Switches low and reverse shift valve and TCC control valve

3

1

2

B3E0517T037

1

Output port

2

Supply port (solenoid reducing pressure)

3

Drain

5

4

3

1

2

3

B3E0517T038

1

Electrical current flows

2

Electrical current does not flow

3

Output port

4

Supply port (solenoid reducing pressure)

05–17–38

AUTOMATIC TRANSAXLE

End Of Sie

PRESSURE CONTROL SOLENOID (LINEAR TYPE) OUTLINE

B3E051721100A08

• The pressure control solenoid with high stability in hydraulic pressure is adopted for the line pressure control.

• Because the pressure control solenoid controls the hydraulic pressure according to the current value, the

degree of freedom in control increases. The controllability is maintained even under aeration, and pressure
variation can be reduced.

End Of Sie

PRESSURE CONTROL SOLENOID (LINEAR TYPE) OPERATION

B3E051721100A09

• By changing the electrical current value (0 A—1

A) inside the solenoid, the pressure control
solenoid adjusts the hold power of the hold
pressure valve, controlling the pressure control
solenoid pressure to the prescribed hydraulic
pressure.

.

.

End Of Sie

AUTOMATIC TRANSAXLE CLEANING

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Cleaning Notes

1. Clean the transaxle exterior thoroughly with steam, cleaning solvents, or both, before disassembly.

Warning

• Using compressed air can cause dirt and other particles to fly out, causing injury to the eyes.

5

Drain

3

1

2

B3E0517T030

1

Solenoid reducing pressure

2

To pressure regulator valve

3

Hold pressure valve

3

1

2

[A]

0

1

B3E0517T031

1

Hydraulic pressure

2

Electrical current value

3

Pressure control solenoid pressure

AUTOMATIC TRANSAXLE

05–17–39

05

Wear protective eye wear whenever using compressed air.

2. Clean the removed parts with cleaning solvent, and dry with compressed air. Clean out all holes and passages

with compressed air, and verify that there are no obstructions.

End Of Sie

AUTOMATIC TRANSAXLE DISASSEMBLY

B3E051701030A28

Precaution
General notes

• The oil pan could contain small chips, shavings, and other particles which may be helpful in inspecting the

condition of the transaxle and diagnosing certain problems.
To ensure that all foreign particles stay in the oil pan, make sure that the transaxle is never tipped completely
over while the oil pan is still installed.

1. Disassemble the transaxle in a clean area (dustproof work space) to prevent entry of dust into the

mechanisms.

2. Inspect the individual transaxle components in accordance with the QUICK DIAGNOSIS CHART during

disassembly.

3. Use only plastic hammers when applying force to separate the light alloy case joints.
4. Never use rags during disassembly; they may leave particles that can clog fluid passage.
5. Several parts resemble one another; arrange them so that they do not get mixed up.
6. Disassemble the control valve component and thoroughly clean it when the clutch or brake band has

burned or when the ATF has degenerated.

Warning

• Although the stand has a self-locking brake system, there is a possibility that the brake may not

hold when the transaxle is held in a lopsided position on the stand. This would cause the transaxle
to turn suddenly, causing serious injury. Never keep the transaxle tilted to one side. Always hold
the rotating handle firmly when turning the transaxle.