SsangYong Stavic / SsangYong Rodius (2005 year). Service manual — part 304

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

30

DC 5-SPEED AUTOMATIC TRANSMISSION

STAVIC - 2004.09

4A

Lockup Solenoid Valve

Circuit diagram

Lockup S/V

1. Leaf spring

2. O-ring

3. Shift plate

Function

This valve activates and releases the lockup clutch by
adjusting the current to solenoid valve according to engine
throttle opening value and output shaft speed. The lockup
clutch operates in 3rd, 4th and 5th gear with steps to re-
duce shift shocks.

Working Current

Operating distance

Resistance

Operating range

1.5 ~ 2.0 A

0.2 mm

2.5 ± 0.2

Ω (25°C)

3, 4, 5 shift

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

31

DC 5-SPEED AUTOMATIC TRANSMISSION

STAVIC - 2004.09

4A

Speed Sensor

Speed

sensor (n3)

Speed

sensor (n2)

1. Leaf spring

2. Valve body

3. Pulse ring

Function

The speed sensors are fixed to the shell of the hydraulic control unit via the contact tabs. A leaf spring, which rests
against the valve body, presses the speed sensors against the transmission housing. This ensures a precise distance
between speed sensors and impulse rings. speed sensor (n3) detects the speed of the front sun gear and speed sensor
(n2) detects the speed of the front planetary carrier. If the speed sensor is defective, the transmission is operated in
emergency driving mode. Below table shows the detection of speed sensor.

Gear

1

2

3

4

5

R (S mode)

R (W mode)

N3

-

•
•
•

-

-

•

N2

•
•
•
•
•
•
•

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

32

DC 5-SPEED AUTOMATIC TRANSMISSION

STAVIC - 2004.09

4A

Speed

sensor

n3

Speed

sensor

n2

Circuit diagram

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

33

DC 5-SPEED AUTOMATIC TRANSMISSION

STAVIC - 2004.09

4A

Function

The oil temperature sensor is installed in hydraulic control unit and is connected in series with the starter lock-out
contact.

This means that the temperature signal is transferred to TCU when the starter lock-out contact is closed.

The oil temperature has a considerable effect on the shifting time and therefore the shift quality. By measuring the oil
temperature, shift operations can be optimized in all temperature ranges.

Circuit diagram

Oil Temperature Sensor

Oil temperature sensor

Oil temperature sensor

AD converter

Starter lock-out contact