Subaru WRX & WRX STI Manuals 2017 WRX & WRX STI Owner’s Manual | Page 408

Starting and operating / Limited slip differential( LSD)( STI)
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Limited slip differential( LSD)( STI)
The LSD provides optimum distribution of power according to the difference in revolutions between the right and left wheels that may be caused by certain driving conditions, thereby improving driving stability on snow-covered, muddy or other slippery roads or when high speed driving.
CAUTION
. Never start the engine while a tire on one side is jacked up, as the vehicle may move.
. If one tire is spinning in mud, avoid continued spinning at high speed as this could adversely affect the LSD.
. If you use a temporary spare tire to replace a flat tire, be sure to use the original temporary spare tire stored in the vehicle. Using other sizes will adversely affect the LSD.
Power steering
& STI
The vehicle is equipped with a hydraulic power steering system. The power steering system operates only when the engine is running.
If you lose power steering assist because the engine stops or the system fails to function, you can steer but it will take much more effort.
CAUTION
Do not hold the steering wheel at the fully locked position left or right for more than 5 seconds. This may damage the power steering pump.
NOTE
Right after the engine has been started and before it has warmed up, you may hear a noise coming from areas adjacent to the power steering pump which is located at the right-front area of the engine compartment. This noise is normal. It does not indicate power steering system trouble.
& Except STI
Power steering warning light
The vehicle is equipped with an electric power steering system. The power steering system operates only while the engine is running. When the ignition switch is turned to the“ ON” position, the power steering warning light on the combination meter illuminates to inform the driver that the warning system is functioning properly. Then, if the engine started, the warning light turns off to inform the driver that the steering power assist is operational.
CAUTION
While the power steering warning light is illuminated, there may be more resistance when the steering
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