System Description

System Diagram:

SYSTEM DESCRIPTION

The PPS (Progressive Power Steering) is vehicle speed sensing type power steering, which increases/decreases steering effort in accordance with vehicle speed.

The power steering ECU assembly sends a control signal to the steering gear (PPS linear solenoid valve assembly) based on a vehicle speed signal. This system enables obtainment of a heavy steering feeling when driving at high speeds.

1. Power steering ECU assembly
The power steering ECU assembly receives a vehicle speed signal from the combination meter. It then sends a signal to the PPS linear solenoid valve assembly.
2. PPS linear solenoid valve assembly
The PPS linear solenoid valve assembly controls power steering fluid pressure by receiving a signal from the power steering ECU assembly.