1995 ACURA TL Service Repair Manual

Page 1145 of 1771

ACURA TL 1995  Service Repair Manual System Descriptio n
This powe r steerin g syste m is speed-sensitive . It s mai n component s ar e a  mechanica l spee d sensor , a  rotar y valve-typ e
gearbox, an d a  constan t volume , vane-typ e

Page 1146 of 1771

ACURA TL 1995  Service Repair Manual Steering Pum p
Constructio n
The pum p is a  vane-typ e incorporatin g a  flo w contro l valv e (wit h a n integrate d relie f valve ) an d i s drive n b y a  POLY-V-bel t
fro m th e cran k pulley . T

Page 1147 of 1771

ACURA TL 1995  Service Repair Manual System Descriptio n
Steering Pum p (cont'd )
Flow Contro l
Fluid fro m th e pum p run s throug h a  meterin g orific e to
th e valv e bod y unit . Thi s create s a  pressur e differenc e
betwee n

Page 1148 of 1771

ACURA TL 1995  Service Repair Manual System Descriptio n
Power Steerin g Spee d Senso r
The powe r steerin g spee d senso r i s a  trochoid-rotor ,
hydraulic pum p combine d wit h a  relie f valv e an d a  one -
wa y valve . I t i s driv

Page 1149 of 1771

ACURA TL 1995  Service Repair Manual 
One-way Valve (In Power Steering Speed

Sensor)

When the vehicle is moving at high speed, negative

pressure develops at the sensor inlet because the power

steering speed sensor is pumping faster t

Page 1150 of 1771

ACURA TL 1995  Service Repair Manual System Descriptio n
System Operatio n
Assist Contro l Valv e
The assis t contro l valv e uni t consist s o f th e assis t contro l valve , whic h i s controlle d b y th e powe r steerin g spee d senso

Page 1151 of 1771

ACURA TL 1995  Service Repair Manual Valve Bod y Uni t
The rotar y valv e bod y uni t ha s tw o valves , a  lo w spee d valv e an d a  hig h spee d valve , whic h ca n b e identifie d b y th e cham -
fer width.
CHAMFE R O F HIG H SPEE D

Page 1152 of 1771

ACURA TL 1995  Service Repair Manual 
System Description

System Operation (cont'd)

Hydraulic Control at Each Speed Range

When stopped:

When the vehicle is stopped with the engine idling, the fluid flow is shut off because the pow