Honda Prelude 1993 Service Manual page 661

System Description
Electronically Controlled Power Assisted 4WS (cont'd)
System Operation
The 4WS control unit receives input from the Vehicle Speed Sensor (VSS), front main steering angle sensor, and the
f.ont sub steering angle sensor. The 4WS control unit calculates the vehicle speed, steering turning angle, steering speed
and steering dijection to determine the best angle to steer the rear wheels.
(System op€ration flow)
Front main st66dng angle sgnsol
VSS ggrves the soeedmeter as
well.
Front gub stooring angl€ sonaol
C.lculation ot steor-
ing rotation speed
Calculation of the
car's apggd
Calculation ot stooring angle lor toar whgels
4WS Control unit
17-16