2010 Subaru Impreza Owner's Manual - Page 245

7-20 Starting and operating tial and rear differential. This sound occurs because of the structure of the center differential. It does not indicate a problem. & Auto mode The auto mode has 3 modes as follows. Mode AUTO [+] Operation This mode emphasizes traction control and strengthens the limitation of differential action that is suitable for driving on slippery roads for vehicle stability. This mode is suitable for most driving situations. This mode is suitable when you seek quick response from the steering wheel and smooth driving. & To change mode of driver's control center differential AUTO AUTO [−] Press the "AUTO-MANU" switch on the center console to switch from auto mode to manual mode or vice versa. When you select the auto mode, the "AUTO" indicator light illuminates. When you select the manual mode, the "AUTO" indicator light turns off. In the auto mode, the system estimates the driving and road conditions using signals from the wheel speed sensor, throttle position sensor, steering angle sensor and brake switch, etc. According to the result, it electronically and automatically controls the degree of limitation of the differential action (LSD torque) to optimize the differential action of the center differential. When the ignition switch is turned ON, the "AUTO" indicator light on the combination meter illuminates. ! Mode setting method In most situations, it is recommended that the "AUTO" mode is selected. Push the control switch forward to select