Thank you for the donation.
Here is a description of the system.
The power steering system is rack and pinion type. Power assistance is proportional to both vehicle speed and steering load. The power assist is high when vehicle speed is low, and low when vehicle speed increases.
The speed sensor is a trochoid-rotor hydraulic pump that is driven by a speedometer gear in the transmission. When the vehicle is in motion the speed sensor pump relieves a portion of the hydraulic pressure which reduces the amount of power assist to the steering. System consists of a power rack and pinion steering gear, steering pump, fluid filter/reservoir, control unit, vehicle speed sensor, cooler lines and hoses.
The PS fluid is leaking past the VSS into the trans and this part is non serviceable. A replacement is necessary.
I only managed to get a circuit diagram of the system and hope it is helpful.
Page 1 of 1 STEERING SYSTEM - POWER - 1989 Honda Prelude Si
Wednesday, September 2nd, 2009 AT 2:55 PM