2013 SSANGYONG NEW ACTYON SPORTS engine

01-16
4. LIMP HOME MODE
In case of transmission malfunction ▶
If a serious fault occurs in the automatic transmission, the TCU enters the limp home mode to
secure safe driving and protect the automatic transmission.
As power is no longer supplied to the solenoid, the current basic function (P, R, N, D) is
maintained and the 4th gear can be maintained only by the operation of the hydraulic system
without electrical operation.
The ECU communicates with other electric modules with CAN. If a serious fault occurs, the
transmission automatically enters the limp home mode for service.
The TCU monitors all factors which can affect to the performance of the transmission and
diagnose the system according to OBD II regulation. 1.
2.
3.
4.
In case of overheated transmission ▶
The TCU enters the limp home mode when the batter voltage drops below 8 V.
If the transmission is overheated, the shift pattern is changed to the hot mode to cool the
transmission more efficiently.
While the transmission is overheated, the selector lever symbol and engine temperature warning
lamp on the instrument cluster blink until the transmission is cooled down to the normal operation
temperature. If the transmission is excessively overheated, the gear cannot be shifted but
remains in the neutral position. 1.
2.
3.
Towing the vehicle with A/T ▶
The best way to transport the vehicle is to load it to a truck and transport it, especially if the vehicle is
4WD.
If towing the vehicle with the propeller shaft connected, the transmission or oil pump of transfer case
may malfunction, resulting in internal damage due to poor lubrication. -

01-18
(2) CAN Input/Output
TCU receives and sends the data among the units through P-CAN communication.
CAN Input/Output Data between Engine ECU and TCU ▶

01-20
3) Transmission Control Monitoring System
TCU monitors all input and output signals to identify possible failures. If a fault is detected, TCU activates
<009b008f008c0047009a0088008d008c009b00a0004700940096008b008c0047009b009600470092008c008c00970047009b008f008c0047008b00990090009d008c009902c5009a0047009a0088008d008c009b00a0004700880095008b0047009b008f00
8c004700930090008d008c0047009a00970088009500470096>f transmission.
Monitoring the Supply Voltage ▶
Monitoring the Supply Voltage to Solenoid ▶
Monitoring the Gear Ratio ▶
Monitoring the Torque Converter ▶ If the battery voltage is too high or too low, the TCU sets the DTC.
TCU monitors the circuits for open or short to ground or supply. The monitoring function evaluates the
voltage characteristics while the switch is ON.
TCU monitors the gear is engaged properly in the allowed time.
TCU checks if the torque converter can be locked up properly. If it is failed, TCU releases the torque
converter clutch to activate the fail-safe operation.
4) Shift Energy Management
This function involves reducing or increasing the engine output torque during shifting. This reduces the
energy which is dissipated in the friction elements of the transmission during up-shift. This is done by
reducing the engine torque during the gear ratio change without interrupting the tractive drive.
This function is used for:
Increasing the life span of transmission by shortening the slipping time
Improving the shift comfort by reducing the step changes due to gearshift
Transferring a higher engine power -
-
-
Real-time control of engine torque is required to maintain the proper shift operations and the durability of
transmission. TCU controls the engine torque during the gearshift by synchronizing the operation of
transmission clutches.

01-213680-01
Pressure Modulation ▶
To provide a higher level of shift comfort and durability, the hydraulic pressure in the shift related friction
elements of the transmission must be matched accurately to the input torque to transmission. This
hydraulic pressure is composed of a hydraulically pre-set basic pressure and a control pressure which is
set by one of the variable bleed solenoids.
The transmission input torque can be directly calculated from the following operating parameters:
engine torque signals
engine speed or any signal transmitted from ECU through CAN lines
converter slip -
-
-
Separate pressure characteristics for each gear change make it possible to adapt precisely to the
particular shift operation.
5) Shift Mode Selection by TCU
The driver can select Standard (S) or Winter mode (W) with the mode switch. TCU automatically
changes the shift mode according to the transmission oil temperature, uphill or downhill gradient, and
altitude to keep the good driving conditions.
Standard Mode (S) ▶
Uphii and Downhill Mode ▶
Altitude Mode ▶ Standard Mode is selected when setting the mode switch in Standard (S) position with the gear select
<0093008c009d008c0099004700900095004702c8006b02c9004700880095008b0047009b008f008c0047009b009900880095009a00940090009a009a00900096009500470096009000930047009b008c00940097008c00990088009b009c0099008c004700
9000950047009500960099009400880093004700960097008c>rating range. Proper shift timing
provides the optimized fuel economy and good driving conditions.
In this mode, the operating points of torque converter lock-up clutch and the shifting points are adjusted
according to the vehicle weight.
In this mode, the shifting points are automatically adjusted according to the altitude to compensate the
engine torque changes due to barometric pressure and temperature.

01-22
Winter Mode (W) ▶
Low Range Driving Mode ▶
Warm Up Mode ▶ When the Winter mode is selected, the second gear is engaged to start off the vehicle easily to prevent
wheel spin on slippery surfaces and WINTER mode indicator comes ON. The first gear is not available
in this mode.
When the vehicle is in 4L driving mode, the transmission uses a different shift mode to optimize the low
range driving. Similar to Winter mode, the first gear is not available.
This mode is normally used when the transmission oil temperature is below 20°C.
<007b008f008c0047009b009600990098009c008c0047008a00960095009d008c0099009b008c00990047008a0088009500950096009b00470089008c004700930096008a0092008c008b0054009c009700470089008c00930096009e00470059005700b600
6a0047009b00960047009700990096009d0090008b008c0047>the warming up process of
transmission.
Hot Mode ▶
<0070008d0047009b008f008c0047009b009900880095009a00940090009a009a00900096009500470096009000930047009b008c00940097008c00990088009b009c0099008c00470090009a00470089008c009b009e008c008c0095004700580058005700
b6006a004700880095008b00470058005b005c00b6006a0053> the system provides the cooling
and reduces the load to the transmission. This is called Hot Mode.
Above 110°C:
Above 130°C:
Above 145°C: -
-
-
In Hot Mode, any of shift mode is not available.
Cruise Control ▶
When the cruise control is activated, the engine ECU requests the downshift to increase the engine
brake effect.PWM fan ON
the engine torque is reduced and WINTER indicator is blinking
the transmission is held in Neutral (N) gear until the oil temperature falls below
120°C (Final protection)

01-253680-01
1) Power Flow - Manual (M Position)
Functioning elements ▶
Control ▶C2 applied, FSG (Forward Sun Gear)
driven
B2 applied to hold Rear Planet Carrier
stationary
Provides engine breake effect -
-
-
S1 ON, C1 shift valve moved to the left end, C1 clutch not engaged
S1 ON, B2 shift valve moved to the left end, B2 band operated (S7 should be ON)
C2 shift valve open (S2 OFF), C2 clutch engaged by drive oil
Drive oil (for C2 clutch engagement) is regulated by VBS S6 -
-
-
-
Connecting Components ▶
Gear
ratioON / OFF solenoids Variable pressure sol. valve-VBS
S1 S2 S3 S4 S5(A) S6(A) S7(A) S8(A) S9(A) S10(A)
3.53 ON 1 0 1 0-1
Gear
ratioEngaged element
C1 C2 C3 B1 B2 OWC Lock-up
clutch
AO AI R AO AI
3.53 ON ON ON
Power Flow Diagram ▶
Manual 1st gear is not engaged even when
moving the manual valve to a certain position.
This gear state is obtained electronically by
solenoids S1 and S7.

03-73170-01
2) Function of N Switch
(1) Aids a smooth start of the vehicle by raising the RPM during the gear
shifting when the engine is cold.
When the vehicle is trying to start from the stopped state (vehicle speed below 3 km/h), the N switch
determines the shifting timing by using the clutch switch and the N switch. It raises the engine RPM (100
~ 200 rpm). Operation conditions are as follows.
The vehicle speed is at the stopped state (Vehicle speed below 3km/h detection).
While depressing the clutch (Clutch switch detection).
The gear lever is at a position other than neutral (N switch detection).
Start the vehicle while depressing the clutch pedal (Clutch switch detection).
The RPM increases in accordance with the temperature of the engine coolant
(Engine coolant temperature sensor detection). -
-
-
-
-
appx. 100 rpm increase
appx. 100 ~ 170 rpm increase
<008800970097009f00550047005f005700b6006a0047004f0095009600990094008800930047009b008c00940097008c00990088009b009c0099008c00470096008d0047009b008f008c0047008c0095008e00900095008c0047008a009600960093008800
95009b005000610047008800990096009c0095008b00470059>00 rpm ·
·
·
When the gear has been smoothly shifted and the vehicle speed exceeds 3km/h, it returns to the
previous operation interval of the engine RPM. -
In case of Actyon, the N switch signal is transmitted to the instrument panel, and then the instrument
panel transmits it to the engine ECU through the CAN communication.
Vehicle Made After 04.09.15 Actyon

03-8
Variant Coding Options
(2) Detects the position of the shifting lever for the HDC operation
among ABS functions.
The HDC function operates only if the M/T shift lever is in forward or reverse position. Please refer to the
ABS section for the specific information related to the HDC.
Variant Coding Related to N Switch ▶
The N switch transmits information to the ECU through the CAN communication while New Rexton is
connected to the ECU through wires. Thus, if you set the variant coding in the engine ECU, you must do
it differently, and you must set the variant coding differently according to the vehicle category and
specification as below.
Neutral Signal Input None / Wire / CANWire /
Actyon & Kyron models with
manual transmission
New Rexton model with manual
transmission Manufactured after
04.09.15
BODY IN: after 154600
Automatic transmission & Rodius
model with automatic transmission
before 2006