AWD models

Pressing force of multiple disc clutch is controlled by electric control. Driving torque distribution of front and rear wheels changes automatically between approximately 0 : 100 (Rear wheel drive) and 50 : 50 (AWD) to have an optimized torque distribution adapted to road condition change.
In accordance with fail-safe function, when system is malfunctioning, AWD control stops, and the system becomes rear wheel drive. Refer to Fail-safe .
When a high load status continues for electric controlled coupling, AWD control temporarily becomes rear wheel drive, according to protection function. Refer to Protection Function .

SYSTEM DIAGRAM

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Signal with Communication Line

Major signal transmission between each unit via CAN communication lines are shown in the following table.

Component parts	Signal item
ECM	Mainly transmits the following signals to AWD control unit via CAN communication. Accelerator pedal position signals Engine speed signals
ABS actuator and electric unit (control unit)	Mainly transmits the following signals to AWD control unit via CAN communication. Each wheel speed signal s Stop lamp switch signals
Combination meter	Mainly transmits the following signals to AWD control unit via CAN communication. Parking brake switch signal s Mainly receives the following signals from AWD control unit via CAN communication. AWD warning display signals

OPERATION CHARACTERISTIC

Vehicle Starts Control

At the start, torque distribution for front and rear wheels is fixed by electric control and stable start is achieved.

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Makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.

Normal Control

On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close to rear-wheel drive and it results in better fuel efficiency and provides FR-like steering characteristics.
When spin occurs on rear wheel, distribute optimum torque to front wheel and keep stable driving.
The vehicle cornering status is judged according to information from each sensor, and the optimum torque is distributed to front wheels for preventing tight cornering/braking symptom.