SsangYong Rexton. Manual - part 534

AUTOMATIC TRANSMISSION  5A-7

SSANGYONG  Y200

Solenoids

The TCM controls seven solenoids. Solenoids 1 to 6
(S1 to S6) are mounted in the valve body, while
Solenoid 7 (S7) is mounted in the pump cover.

•

Solenoid 1 and 2: S1 and S2 are normally open ON/
OFF solenoids that set the selected gear. These
solenoids  determine static gear position by
operating the  shift valves. Note that S1 and S2
solenoids also send signal pressure to allow or
prohibit rear band engagement.

•

Solenoid 3 and 4: S3 and S4 are normally open ON/
OFF solenoids that combine to control shift quality
and sequencing. S3 switches the clutch regulator
valve OFF or ON. S4 switches the front band regula-
tor valve OFF or ON. S5 also provides the signal
pressure for the converter clutch regulator valve.

•

Solenoid 5: S5 is a variable pressure solenoid that
ramps the pressure during gear changes. This sole-
noid provides the signal pressure to the clutch and
band regulator, thereby controlling the shift pres-
sures. S5  also provides the signal pressure for the
converter clutch regulator valve.

Gear

S1

S2

1st

ON

ON

2 n d

OFF

ON

3 r d

OFF

OFF

4 t h

ON

OFF

Reverse

OFF

OFF

Neutral

OFF

OFF

Park

OFF

OFF

•

Solenoid 6: S6 is a normally open ON/OFF solenoid
that sets the high/low level of line pressure. Solenoid
OFF gives high pressure.

•

Solenoid 7: S7 is a normally open ON/OFF solenoid
that controls the application of the converter clutch.
Solenoid ON activates the clutch.

Solenoid Logic for Static Gear States

5A-8  AUTOMATIC TRANSMISSION

SSANGYONG  Y200

Shift

To Initiate Shift

Typical S5 Current Ramp

To Complete Shift

1-2

S1 OFF

750mA to 600mA

S4 OFF

S4 ON

1-3

S1 OFF

S3 OFF

S2 OFF

850mA to 750mA

S4 OFF

S3 ON

S4 ON

1-4

S2 OFF

S3 OFF

S3 ON

850mA to 750mA

S4 OFF

S4 ON

2-3

S2 OFF

700mA to 500mA

S3 OFF

S3 ON

S4 OFF

S4 ON

3-4

S1 ON

750mA to 600mA

S4 OFF

S4 ON

4-3

S4 ON

750mA to 900mA

S1 OFF

S4 OFF

4-2

S3 ON

S1 OFF

750mA to 950mA

S2 ON

S3 OFF

4-1

S3 ON

S2 ON

S4 ON

600mA to 1000mA

S3 OFF

S4 OFF

3-2

S2 ON

S4 OFF

S4 ON

600mA to 450mA @ 20 kph.

550mA to 400mA @ 60 kph.

800mA to 650mA @ 100 kph.

3-1

S3 ON

S1 ON

S4 ON

S2 ON

S3 OFF

700mA to 950mA

S4 OFF

2-1

S4 ON

800mA to 950mA

S1 ON

S4 OFF

Conv. Clutch

ON

S7 ON

700mA to 400mA

S7 OFF

OFF

600mA to 100mA

Solenoid Operation during Gearshifts

AUTOMATIC TRANSMISSION  5A-9

SSANGYONG  Y200

Solenoid Valve Symbols

(ON/OFF Solenoids)

The solenoid symbol shown adjacent to each solenoid
on the hydraulic system schematics indicates the state
of the oil flow through the solenoid valve with the power
ON or OFF.

Normally Open (NO) Solenoid

POWER ON: Line 500 port is closed. The output port
is open to exhaust at the solenoid valve.

POWER OFF: The exhaust port is closed. The output
port is open to line 500.

Variable Pressure Solenoid Multiplexing System

Friction element shifting pressures are controlled by
the Variable Pressure Solenoid (VPS).

Line pressure is completely independent of shift pres-
sure  and is a function of throttle position, gear state
and engine speed.

S5 is a proportional or variable pressure solenoid that
provides the signal pressure to the clutch and band
regulator valves thereby controlling shift pressures.

VPS pressure is multiplexed to the clutch regulator
valve, the band regulator valve and the converter clutch
regulator valve during automatic gearshifts.

A variable pressure solenoid produces a hydraulic
pressure inversely proportional to the current applied.
During a gearshift the TCM applies a progressively
increasing or decreasing (ramped) current to the
solenoid. Current applied will vary between a minimum
oaf 200 mA and a maximum of 1000 mA. Increasing
current decreases  output (S5) pressure. Decreasing
current increases output (S5) pressure.

Line 500 pressure, (approximately 440 to 560 kPa), is
the reference pressure for the VPS, and the VPS output
pressure is always below line 500 pressure.

When the VPS is at standby, that is no gearshift is
taking place, the VPS current is set to 200 mA giving
maximum output pressure.

Under steady state conditions the band and clutch
regulator valve solenoids are switched OFF.

This applies full Line 500 pressure to the plunger and
because Line 500 pressure is always greater than S5
pressure it squeezes  the S5 oil out between the
regulator valve and the plunger. The friction elements
are then fed oil pressure equal to Line 500 multiplied
by the amplification ratio.

When a shift is initiated the required ON/OFF solenoid
is  switched ON cutting the supply of Line 500 to the
plunger.

At the same time the VPS pressure is reduced to the
ramp start value and assumes control of the regulator
valve by pushing the plunger away from the valve.
The VPS then carries out the required pressure ramp
and the timed shift is completed by switching OFF the
ON/ OFF solenoid and returning the VPS to the standby
pressure.

This system enables either the band or clutch or both
to be electrically controlled for each gearshift.

Mode Indicator Light

Depending on the application, the mode indicator light
may be used to indicate the mode that has been se-
lected or if an overheat condition exists. The mode
indicator light is usually located on the instrument
cluster.

Communication Systems

CAN

The Controller Area Network (CAN) connects various
control modules by using a twisted pair of wires, to
share common information. This results in a reduction
of sensors and wiring. TCM obtains the actual engine
speed  and throttle position, vehicle speed and
accelerator  position etc. from ECM via CAN without
any additional sensors.

K-Line

The K-line is typically used for obtaining diagnostic
information from the TCM. A scan tool with a special
interface is connected to the TCM via Data Link
Connector (DLC) and all current faults, stored faults,
runtime parameters  are then available. The stored
trouble codes can also be cleared by scan tool.

The K-line can be used for vehicle coding at the
manufacturer’s plant or in the workshop. This allows
for one TCM design to be used over different vehicle
mod-els.

The particular code is sent to the microprocessor via
the K-line and this results in the software selecting the
correct shift and VPS ramp parameters.

Data Link Connector (DLC)

The Data Link Connector (DLC) is a multiple cavity
connector. The DLC provides the means to access the
serial data from the TCM.

The DLC allows the technician to use a scan tool to
monitor the various systems and display the Diagnostic
Trouble Codes (DTCs).

KAA5A070

5A-10  AUTOMATIC TRANSMISSION

SSANGYONG  Y200

The DLC connector is located within the driver’s
compartment, directly below the instrument panel on
the driver’s side.

HYDRAULIC CONTROL SYSTEM

The hydraulic controls are located in the valve body,
pump body and main case.

The valve body contains the following;

•

Manual valve

•

Three shift valves

•

Sequence valve

•

Solenoid supply pressure regulator valve

•

Line pressure control valve

•

Clutch apply feed regulator valve

•

Band apply feed regulator valve

•

Solenoid S1 to S6

•

Reverse lockout valve

The pump cover contains the following;

•

Primary regulator valve for line pressure

•

Converter clutch regulator valve

•

Converter clutch control valve

•

Solenoid S7

The main case contains the following;

•

B1R exhaust valve

All upshifts are accomplished by simultaneously
switching on a shift valve(s), switching VPS pressure
to the band and/or clutch regulator valve, and then
sending the VPS a ramped current. The shift is
completed by switching the regulators OFF and at the
same time causing the VPS to reach maximum
pressure.

All downshifts are accomplished by switching VPS pres-
sure to the band and/or clutch regulator valve and send-
ing a ramped current to the VPS. The shift is completed
by simultaneously switching the regulators OFF,
switching the shift valves and at the same time causing
the VPS to return to stand-by pressure.

The primary regulator valve is located in the pump
cover and supplies four line pressures; high and low
for forward gears, and high and low for reverse. This
pressure  has no effect on shift quality and merely
provides static  clutch capacity during steady state
operation. Low pressure can be obtained by activating
an ON/OFF solenoid with high line pressure being the
default mode.

Torque converter lock-up is initiated by toggling the
converter clutch control valve with an ON/OFF solenoid.

The actual apply and release of the clutch is regulated
by the VPS via the converter clutch regulator valve.

The solenoid supply pressure regulator valve provides
reference pressure for all the solenoids.

A103A321