Transaxle Electronic Control System; Tcu (Transmission Control Unit) - SSANGYONG Korando 2013 Manual

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
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