System Description: Notes

The system is composed primarily of the power steering oil pump assembly (power steering control module, power steering motor, power steering oil pump, and reservoir tank), hydraulic pipes, and steering gear assembly.
The Power Steering Control Module controls the speed of the power steering motor according to the vehicle speed and steering angle speed. By changing the power steering oil pump flow, the Power Steering Control Module controls the steering assist force.
According to the power steering motor control, the system hydraulic pressure is transmitted from the power steering motor to power steering oil pump. The power steering oil pump is driven by the system hydraulic pressure.
After engine start, the hydraulic pump electric power steering system performs control.
When a malfunction occurs in the system, the fail-safe function stops the hydraulic pump electric power steering system (manual steering state) or restricts its operation (certain steering assist force). Refer to Fail-safe .
When the power steering function is used continuously in an extreme manner, the protective function reduces the output to the power steering motor. Refer to Protection Function .