Check At Road Speed; Power Steering Speed Sensor Replacement - Honda Prelude 1993 Service Manual

On-Car
Assist
Checks
Check at Road Speed
P o w e r S t e e r i n g S p e e d S e n s o r
2 .
' 1 .
4 .
Check the power steering fluid level lsee page
17-771 and pump belt tension (see page 17 74).
Sta.t the engine, let it warm up to normal operating
temperature (the cooling fan comes on), and turn
the steering wheel lock-to lock a few times to
warm up the fluid.
Stop the engine. To simulate speeds above 50 mph
(80 km/h), disconnect the hoses from the power
steering speed sensor and connect them to the
bypass tube joint. PIug the end of the bypass tube
joint. BYPASS TUBE JOINT
0 7 4 0 6 - 0 0 1 0 1 0 1
(lncluded with
07406-0010001)
Plugs.
Attach the spring scale to the steering wheel. With
the engine idling and the car on a clean, dry floor,
pull the scale as shown and read it as soon as the
tires begin to turn.
lf the scale reads a normal 50 N (5.o kg, 1 1 lbs),
or more the assist problem at high speeds is be-
ing caused by reduced power steering speed
sensor output.
Replace the power steering speed sensor.
l f t h e s c a l e r e a d s l e s s t h a n 5 0 N ( 5 , O k g , I 1 l b s ) ,
the power steering speed sensor is OK and the
problem is in the sensor leed line, the pump, or
lhe valve body unit.
See if the feed line is pinched or bent then check
pump-
See General Troubleshooting (see page 17-25).
Replacement
1. Remove the rear mounting bracket stay.
2.
Disconnect the sensor wire connector trom the
power steenng speeo sensor.
Remove the sensor mounting bolt and pull the
power steering speed sensor lrom the diflerential
n o u s r n g .
Disconnect the sensor hoses and plug the tittings.
3 .
4 .
SENSOR MOUNTING BOLT
6 x 1 . O m m
1 9 N . m
(1 .9 kg-m, 14 lb-ft)
NEAR MOUNTING
BRACKET STAY
1 0 x 1 . 2 5 m m
2 1 N . m
( 2 . 1 k s - m , 1 5 l b - f t I
POWER STEERING
SPEED SENSOR
O-RING
Replace.
HOSES
10 r
'l .25 mm
39 N.m
(3 9 kg-m' 28 lb-ftl
Alter installing a new power steering speed sensor,
turn the steering wheel lock to lock with the engine
idling to bleed air lrom the system.
Check the reservoir and add fluid if necessary (see
p a g e 1 7 - 7 7 1 .
6 .
17-80