Progressive Power Steering System

System Diagram:

SYSTEM DESCRIPTION

1. SYSTEM FUNCTION
a. Progressive Power Steering (PPS) is a vehicle speed sensing type of power steering, which increases/ decreases steering support in accordance with vehicle speed. The power steering ECU sends a control signal to the steering gear (PPS solenoid valve) based on a vehicle speed signal. As a result, the steering feels tighter when driving at high speeds.




2. FUNCTION OF MAIN COMPONENTS