Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2014IMPREZA SPORT LIMITEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2 (AUTOMATIC TRANSMISSION - MECHANISM & FUNCTION (5AT))ELECTRONIC HYDRAULIC CONTROL SYSTEMCONTROL ITEMS
2014 Subaru Impreza Sport Limited
Control Items
2014 Subaru Impreza Sport LimitedSECTION Control Items
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2014 Subaru Tribeca, 2014 Subaru Outback, 2014 Subaru Legacy, 2013 Subaru Tribeca, and 2013 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.
| Control items | Control details | ||
|---|---|---|---|
| Transmission hydraulic control | Shifting control | Shift pattern selection | Based on the shift pattern selected by input from switches in each range, upshift and downshift points are set according to accelerator pedal opening angle and vehicle speed. |
| Linear solenoid control for each shift clutch | Directly controls the linear solenoid for each shift clutch according to target gear range. The control values are constantly corrected by learning control and real-time feedback, contributing shifting quality improvement and prevention of quality aging. | ||
| Engine brake control | In manual mode, controls high&low reverse clutch solenoid so that engine brake is applied at 1st speed. | ||
| Lock-up control | Basic lock-up control | Based on the shift pattern selected by input from switches in each range, lock-up engagement and release points are set according to accelerator pedal opening angle and vehicle speed. In accordance with these points, the lock-up solenoid is controlled to engage and release the lock-up clutch in torque converter. | |
| Smooth control | In lock-up clutch engagement, gradually changes pressure to provide smooth engagement. | ||
| Line pressure control | Controls the line pressure in accordance with the input torque, front vehicle speed signal, rear vehicle speed signal and gear range. | ||
| AWD center differential control | Normal transfer control | Torque sensitive control | Adjusts the multi-plate clutch (LSD) pressure according to torque input to the transfer. |
| Control for turning | Adjusts the LSD pressure based on the steering angle and vehicle speed. | ||
| Slip control | LSD pressure increases if front or rear wheels start to slip. | ||
| Cooperation control | Control during ABS operation | LSD pressure is adjusted to the set value during ABS operation. | |
| Control during braking | LSD pressure is adjusted to the set value while the brake switch is ON with the throttle valve fully closed. | ||
| Control during VDC and TCS operation | LSD pressure is adjusted to the set value during VDC and TCS operation. | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.