SsangYong Korando III (2010 year). Manual — part 212

02-12

1st Gear State

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The 1st gear state will display on the

instrument cluster. Unlike the normal 1st gear,

engine braking will be available in this manual

1st state.

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2nd Gear State

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The 2nd gear state will display on the

instrument cluster. 2-1 automatic kick-down

shifts are available. 2nd gear has engine

braking available.

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3rd Gear State

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The 3rd gear state will display on the

instrument cluster. 3-2 and 3-1 automatic

kick-down shifts are available. 3rd gear has

engine braking available.

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4th Gear State

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The 4th gear state will display on the

instrument cluster. 4-3 and 4-2 automatic

kick-down shifts are available. 4th gear has

engine braking available.

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5th Gear State

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The 5th gear state will display on the

instrument cluster. 5-4 and 5-3 automatic

kick-down shift is available. 5th gear has

engine braking available.

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6th Gear State

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The 6th gear state will display on the

instrument cluster. 6-5 and 6-4 automatic

kick-down shifts are available. 6th gear has

engine braking available.

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STD type

SVC type

02-13

3680-01

4. LIMP HOME MODE

When the transaxle is defective

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In the event of a system fault, the TCU also provides for failure mode effect control (FMEC) to maintain

maximum functional operation of the transaxle.

In the event of a total loss of control or electrical power, the basic transaxle functions (Park, Reverse,

Neutral and Drive) are retained. The 4th and reverse gear ratios with the torque converter clutch in the

unlocked state are the retained gear states the hydraulic system supports without any electrical

assistance.

The TCU communicates with other vehicle electronic control modules by the controller area network

(CAN). If a major fault develops, the transaxle may automatically operate in a "limp home" (failure)

mode to enable the vehicle to be driven to an authorized dealer for repair.

The TCU also provides for transaxle diagnostics, which meet the requirements of OBD II legislation,

monitoring all components which may effect vehicle emissions.

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4.

When the transaxle overheats

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Limp home mode may also be engaged if the battery charge falls below 8V.

If the transaxle overheats, the shift patterns will automatically change to enable improved transaxle

cooling.

During transaxle overheat, the instrument cluster transaxle selector position display and the over
temperature condition is indicated by flashing the “W(Winter)” indicator on the instrument

cluster until normal transaxle operating temperature is reached.

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2.

3.

Towing the automatic transaxle equipped vehicle

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Flat-bed equipment is the best method of moving a disabled vehicle to avoid any damages.

For AWD vehicle: The vehicle must be towed with a wheel lift and dollies or flatbed equipment with

all the wheels off the ground.

For 2WD vehicles: It is acceptable to tow the vehicle with the rear wheels on the ground without

dollies and the front wheels off the ground. When being towed by a commercial towtruck and wheel

dollies are not available, the front of the vehicle should be lifted, not the rear.

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02-14

5. TRANSAXLE ELECTRONIC CONTROL SYSTEM

1) General Information

The transmission control unit (TCU) and its input/output network control the following transmission

operations:

Shift timing

Line pressure

Clutch pressure (shift feel)

Torque converter clutch

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also uses these signals when determining transaxle operating strategy. Using all of these input signals,

the TCU can determine when the time and conditions are right for a shift, or when to apply or release the

torque converter clutch. It will also determine the pressure needed to optimise shift feel. To accomplish

this, the TCU operates six variable bleed control solenoids and four on/off solenoids to control transaxle

operation.

2) TCU (Transmission Control Unit)

The transaxle control unit (TCU) is mounted

under the driver's seat and controls the operation

of the transaxle.

The TCU is activated and deactivated by the

ignition power supply and is connected to the

transaxle link harness by a 26 pin connector. The

TCU processes information received from internal

sensors and signals received across the CAN

bus in analogue and digital forms such as:

Transaxle input speed

Transaxle output speed

Accelerator pedal position

Gear selector position

Engine torque

Engine speed

Transaxle fluid temperature

Brake pedal status

Engine oil temperature

Engine coolant temperature

Ambient air temperature

Barometric pressure

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02-15

3680-01

This information is used by the TCU to decide which shift pattern to select and for shift energy

management. Electro-hydraulic solenoid valves and variable bleed solenoids control the transaxle gear

changes.

Six variable bleed solenoids and four on/off solenoids are used to direct transaxle fluid flow to control the

fluid pressure within the three clutches and two bands. Separate pressure regulators are used

exclusively for torque converter clutch control and main transaxle line pressure.

The TCU monitors all TCU inputs and outputs to confirm correct system operation. If a fault occurs the

TCU is able to perform default action and inform the driver of the problem through the instrument cluster

warning lights. Detailed information is available via trouble codes which can be read with the service tool.