Power Steering System (Diagnostics): General Description: Note

During driving, the assist system will not be activated when the ignition voltage drops.
Power steering assist is not started unless both of the ignition switch ON signal and the engine speed signal are input.
In any of the following cases, the power steering assist is limited and steering wheel operation may become heavy.
- When the steering wheel is held to an end for a long time during parking
- When the steering wheel turning to right and left at slow speed is repeated
  The assist limitation (overheat protection control) may operate to prevent failures by overheat. In this case, by stopping the engine for approx. 30 minutes for cooling, the assist will start operating.
  
  While assist limitation (overheat protection control) is in active, [Limited Assist] is displayed in [EPS Status] in the Subaru Select Monitor [Data Monitor].
History can be confirmed on [ECU Overheat Protection] or [IGN count from overheating protection (most recent)] of [Data Monitor].
The overheat protection control system is normal operation, therefore, the power steering warning light will not come on and there will be no DTC displayed.
If the power steering system connector is disconnected while cooling under the overheat protection control, different DTC may be recorded. If there is no DTC and assist limitation is in active, stop the engine for approx. 10 minutes for cooling.
Perform steering END STOP learning after the steering gearbox, universal joint, column, steering wheel or steering angle sensor was removed and reinstalled or replaced.
- After replacement with a new part: Inspection mode B Ref. to POWER STEERING (DIAGNOSTICS)>INSPECTION MODE>PROCEDURE>INSPECTION MODE B .
- Others: Clear EPS Internal Value 1 Ref. to POWER STEERING (DIAGNOSTICS)>WORK SUPPORT>LIST .
After replacing the steering gearbox, perform MAP check. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>POWER STEERING SYSTEM>OPERATION>CHECK ASSIST MAP .