Transmission And Control System Operation

AWD MODEL
An electronically controlled full-time AWD System designed uniquely for Subaru on the basis of the FWD Transmission is adopted. This system has a Transfer Hydraulic Pressure Control Unit incorporating Duty Solenoid and a Multi-Plate Transfer (MPT) consisting of a wet type Multi-Plate Clutch on the rear of the Automatic Transmission section.

The Control Unit stores optimum transfer Clutch torque (duty ratio) data for various driving conditions. When actual driving conditions (Vehicle speed, Throttle opening, gear range, wheel slip, etc.) are detected by various sensors, the Control Unit selects the most suitable duty ratio from memory, and controls the transmitting torque of the Transfer Clutch by means of the hydraulic pressure controlling Duty Solenoid.

Features
- The Transfer Clutch capacity can be accurately controlled by means of the Electronic Control System. This is especially effective for eliminating tight corner braking phenomenon which occurs at low speeds, thereby achieving smooth driving.
- An optimum rear wheel drive distribution is achieved which corresponds to Engine output and gear shift position and improves fuel consumption and steering stability.
- For the car equipped with Anti-Locking Brake System (ABS), the braking performance is improved by the control of the Clutch and gear locking at a particular shift position through ABS operation-time control.
- Driveability and comfort are improved with the use of manual range.

Indication of Failure

When any on-board diagnostic item is malfunctioning, the display on the AT OIL TEMP indicator blinks immediately after the engine starts. The malfunctioning part or unit can be determined by a trouble code during on-board diagnostic operation. Problems which occurred previously can also be identified through the memory function. If the AT OIL TEMP indicator does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the select monitor.

WARNING: Warning can be noticed only when the engine is initially started.