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nsxb17008a.pdf

System Description
Major Components
The Electrical Power Steering system is composed of the following major components:
• A steering gearbox that converts rotary operation of the steering wheel into transverse operation via a rack and pinion
mechanism. Steering sensors and an actuating motor are incorporated.
• A control unit that computes the optimum amount of power assistance, taking into account steering torque, steering
speed, and vehicle speed. Self-diagnosis functions are included.
• A power unit that drives the motor according to the signals from the EPS control unit. A current sensor is built in to
give feedback information to the EPS control unit. Two relays shut off the power if a problem in the system occurs.
• The countershaft speed sensor on the automatic transmission or the differential speed sensor on the manual transmis-
sion sends a vehicle speed signal to the EPS control unit. Also the speedometer sends a vehicle speed signal to the EPS
control unit. The two signals are used as a double-check.

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nsxd17010a.pdf

Steering Wheel
Installation
NOTE: Before installing the steering wheel, make sure
the front wheels are straight ahead.
CAUTION:
Be sure to install the harness wires so that they are
not pinched or interfering with other car parts.
Do not replace the original steering wheel with any
other design, since it will make it impossible to proper-
ly install the airbag. (Use only genuine HONDA
replacement parts.)
After reassembly, confirm that the wheels are still
straight ahead and that steering wheel spoke angle
is correct. If minor spoke angle adjustment is neces-
sary, adjust the tie-rods only. Do not remove and
reposition the steering wheel.
Confirm that the airbag assembly is secure-
ly attached to the steering wheel; otherwise, severe per-
sonal injury could result during later airbag deployment.
1. Before installing the steering wheel, center the ca-
ble reel.
Do this by first rotating the cable reel clockwise un-
til it stops.
Then rotate it counterclockwise (approximately two
turns) until:
ARROW MARK
CABLE REEL
YELLOW GEAR TOOTH
ALIGNMENT MARK
2. Install the steering wheel.
NOTE: Be sure the steering wheel shaft engages the
cable reel.
50 N.m
(5.0 kg-m, 36 Ib-ft)
PIN
PIN
3. Insert the cruise control set/resume 4-P connector
and airbag 3-P connector to the steering wheel
clips.
4. Connect the horn connector.
CRUISE CONTROL
SET/RESUME SWITCHES
4-P CONNECTOR
HORN
CONNECTOR
The yellow gear tooth lines up with the mark on the
cover.
The arrow on the cable reel label points straight up.

5. Install the airbag assembly with new TORX® bolts.
TORX® BOLT
10 N·m (1.0 kg-m, 7 Ib-ft)
Replace
TORX® BOLTS
10 N·m (1.0 kg-m, 7 Ib-ft)
Replace
AIRBAG ASSEMBLY
7. Disconnect the short connector from the airbag 3-P
connector.
8. Connect the airbag 3-P connector and cable reel 3-P
connector.
9. Attach the short connector to the access panel,
and install the access panel on the steering wheel
lower cover.
ACCESS PANEL
SHORT CONNECTOR
(RED)
10. Connect the battery positive terminal and then con-
nect the negative terminal.
11. After installing the airbag assembly, confirm proper
system operation:
Turn the ignition to II: the instrument panel SRS
indicator light should come on for about 6
seconds and then go off.
Confirm operation of horn buttons.
Confirm operation of cruise control set/resume
switch.
Turn the steering wheel counterclockwise and
make sure the yellow gear tooth still lines up with
the alignment mark.
YELLOW GEAR TOOTH
ALIGNMENT MARK

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nsxb17064a.pdf

EPS Control Unit
Replacement
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section 24 before performing repairs or ser-
vice.
1. Remove the dashboard lower cover.
DASHBOARD LOWER COVER
2. Turn up the floor mat, and remove the speaker cover
and speaker.
SPEAKER COVER
SPEAKER
3. Disconnect the connectors from the EPS control
unit, then remove it.
10 N-m (1.0 kg-m, 7 Ib-ft)
3P CONNECTORS
EPS CONTROL UNIT
18P CONNECTOR
10 N-m (1.0 kg-m, 7 Ib-ft)
4. Installation is the reverse of removal procedure.
NOTE: After installation, start the engine and make
sure that the EPS indicator light goes off.

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nsxd17069a.pdf

Inspection
1. Carefully clamp the gearbox in a vise with soft jaws.
2. Remove the boot bands.
BOOT BAND
Replace.
LOCK WASHER
Replace.
(cont’d)
10 cm
(0.4 in)
STEERING INSPECTION ARM
07974-SD90000
60 mm (2.4 in)
Preload Inspection:
3. Pull the boots away from the ends of the gearbox,
unbend the tie-rod lock washers.
4. Hold the rack with a wrench, and unscrew the tie-
rods with another wrench.
Rack guide screw adjustment:
Loosen the rack guide screw locknut.
Tighten, loosen and retighten the rack guide screw
two times to 4 N.m (0.4 kg-m, 2.9 Ib-ft), back it off
NOTE: Slide the steering rack in the cylinder until
the end of the rack projects 60 mm (2.4 in) from
the cylinder end. Inspection is made near this rack
position.
Install the special tool on the pinion shaft and check
the preload with a spring scale.
If the preload is out of the specification, adjust the
rack guide.
Preload 30 N (3 kg, 6.6 Ibs) maximum
20
Unbend

Power Steering
Inspection (cont’d)
Retighten the locknut while holding the rack guide
screw with a wrench.
Tie-rod installation:
5. Screw each rack end into the rack while holding the
lock washer so its tabs are in the slots in the rack
end.
NOTE: Install the stopper washer with the cham-
fered side facing out.
6. Tighten the rack end securely, then band the lock
washer back against the flat on the flange as shown.
NOTE: Coat the stopper washer with grease suffi-
LOCKNUT
25 N.m (2.5 kg-m, 18 Ib-ft)
LOCKNUT WRENCH. 40 mm
07916-SA50001
RACK END
55 N.m
(5.5 kg-m, 40 Ib-ft)
ciently.
RACK END
TAB
SLOT
STOPPER WASHER
LOCK WASHER
Installation
direction.
bends.

7. Install the boots on the rack end with the tube
clamps.
NOTE:
BOOT
TUBE CLAMP
STEERING GREASE
(Honda P/N 08733-B070E)
Coat the inside of the boot.
SILICONE GREASE
Coat the sliding surface
of the rack end.
8. Install the new boot bands on the boot and bend both
sets of locking tabs.
Lightly tap on the doubled portions to reduce their
height.
NOTE: After assembling, slide the rack right and left
to be certain that the boots are not deformed or
twisted.
9. If the tie-rod ends were removed, install the tie-
rods on the right and left rack ends and screw them
in until the threaded section is 11 mm (0.4 in) in
length.
10. Install the gearbox and the front crossbeam (see
page 17-66).
11. Check the wheel alignment and adjust if necessary
(see section 18).
BOOT BAND
LOCKING TABS
11 mm (0.4 in)
LOCKNUT
Hand tighten.
TIE-ROD END
Coat the rack end and inside of the boot with the
grease.
Before installing the boot, be sure that the pres-
sure inside of the boot is the atmospheric
pressure. .
Install the boot band with the rack in the straight
ahead condition (i.e. right and left tie-rods are
equal in length).

Power Steering
Ball Joint Boot Replacement
1. Remove the set ring and the boot.
CAUTION: Do not contaminate the boot installation
section with grease.
2. Pack the interior of the boot and lip with grease.
5. Insert the special tool into the threads in the ball pin
and align the end of the tool with the groove in the
boot.
Slide the set ring over the tool and into position.
CAUTION: After installing the boot, check the ball
pin tapered section for grease. Wipe it if necessary.
3. Wipe the grease off the sliding surface of the ball
pin, then pack the lower area with fresh grease.
CAUTION:
BOOT INSTALLATION SECTION
BALL PIN TAPERED
SECTION
4. Install the boot in the groove of the boot installation
section securely, then bleed air.
BOOT INSTALLATION
SECTION
LIP BALL JOINT BOOT CLIP GUIDE07MAG-SL00100
Adjust the depth by
turning the tool.
BOOT
SET RING
Keep grease off the boot installation section and
the tapered section of the ball pin.
Do not allow dust, dirt, or other foreign materi-
als to enter the boot.

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nsxb17002a.pdf

Special Tools
17-55
17-63
17-23
17-61, 17-44
17-60
Main Menu
Table of Contents
Special Tools
Ref. No. Tool Number
Description
Page Reformas
® 07MAc — SL00200
® 07MAG — SL001DO
® 07 РА2 – 0010100
® 07916 – SA50001
(5) 07974 – 5090000
Ball Joint Remover, 28 mm
Ball Joint Boot Clip Guide
SCS Service Connector
Locknut Wrench, 40 mm
Steering Inspection Arm
1755
17-63
17-23
1761, 17-44
17-60
17-2

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nsxb17003a.pdf

Component Locations
Index
NOTE:
• If an intact airbag assembly has been removed from a scrapped car or has been found defective or damaged during transit,
storage or service, it should be deployed (see section 24).
• Before removing the gearbox, remove the ignition key to lock the steering shaft.
• After installing the gearbox, check the wheel alignment and adjust if necessary.
EPS CONTROL UNIT
Replacement, page 17-64
STEERING GEARBOX
Removal/Installation, page 17-55
Illustrated Index, page 17-59
Pinion Preload Inspection, page 17-60
Rack Guide Screw Adjustment, page 17-60
STEERING WHEEL/
AIRBAG ASSEMBLY
Removal, page 17-45
Disassembly, page 17-46
Installation, page 17-47
STEERING COLUMN
Removal, page 17-49
Inspection, page 17-51
Installation, page 17-52

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nsxd17019a.pdf

Manual Steering
Gearbox Removal/Installation
NOTE: Before removing the steering gearbox, make
sure the front wheels are straight ahead.
1. Remove the steering joint cover.
STEERING JOINT COVER
CLAMPCLIP
2. Remove the steering joint bolts, and disconnect the
steering joint by moving the joint toward the
column.
STEERING JOINT
STEERING JOINT BOLTS
22 N.m (2.2 kg-m, 16 Ib-ft)
3. Lock the steering shaft with ignition key to keep
the steering shaft position.
4. Raise the car and place safety stands in the proper
locations (see section 1).
5. Remove the front wheels.
8 x 1.25 mm
BOLT WASHERS
25 N.m (2.5 kg-m, 18 Ib-ft)
Corrosion resistant bolt/nut
FLOOR UNDER
COVER
9. Remove the folding spare tire and spare tire holder
plate.
10. Disconnect the battery negative terminal, then
disconnect the positive terminal and remove the
battery.
11. Remove the spare tire holder and floor under cover.
10 N·m
(1.0 kg-m, 7 Ib-ft)
SPARE TIRE
HOLDER
(cont’d)
COTTER PIN
Replace.
On reassembly, bend
the cotter pin as shown.
Corrosion resistant bolt/nut
CASTLE NUT
44 N·m
(4.4 kg-m, 32 Ib-ft)
10 mm HEX NUT
NOTE: If necessary, apply penetrating type lubricant
to loosen the ball joint.
BALL JOINT REMOVER. 28 mm
07MAC-SL00200
6. Remove the cotter pin from the castel nut and
remove the nut.
7. Install the 10 mm hex nut on the ball joint. Be sure
that the 10 mm hex nut is flush with the ball joint
pin end, or the threaded section of the ball joint pin
might be damaged by the ball joint remover.
NOTE: Remove the ball joint using the Ball Joint
Remover, 28 mm (07MAC-SL00200). Refer to
page 18-21(’93-’96), 18-21(’91-’92) for how to use
8. Separate the tie-rod ball joint and knuckle using the
special tool.
CAUTION: Avoid damaging the ball joint boot.
TOOTHED LOCK
WASHERS

Manual Steering
Gearbox Removal/Installation (Cont’d)
12. Remove the flange bolts and nuts from the gearbox
and front crossbeam.
10 mm FLANGE NUTS
60 N·m
(6.0 kg-m, 43 Ib-ft)
FRONT CROSSBEAM
10 x 97 mm
FLANGE BOLT
FLANGE BOLT
Corrosion resistant bolt/nut
13. Remove the steering gearbox from the front cross-
beam by removing the flange bolts.
FLANGE BOLTS
60 N.m (6.0 kg-m, 43 Ib-ft)FRONT CROSSBEAM
Front
GEARBOX
ASSEMBLY
Corrosion resistant bolt/nut
14. Install the gearbox in the reverse order of removal.
CAUTION: Torque the castle nut of the tie-rod end
to the lower torque specification, then tighten it on-
ly far enough to align the slot with the pin hole. Do
not align the nut by loosening.
NOTE: When connecting the steering joint, make
sure that the cable reel of SRS is centered.
15. Set the steering rack in the center of its strokes.
16. Center the cable reel as follows:
Turn the steering wheel left approx. 150
degrees, to check the cable reel position with
indicator.
If the cable reel is centered, the yellow gear
tooth lines up with the alignment mark on the
cover.
Return the steering wheel right approx. 150
degrees to position the steering wheel in the
straight ahead position.
YELLOW GEAR TOOTH
ALIGNMENT MARK
17. Slip the lower of the steering joint onto the pinion
shaft (line up the bolt hole with the groove around
the shaft) and loosely install the lower bolt.
NOTE:
Be sure that the lower steering joint bolt is
securely in the groove in the steering gearbox
pinion.
If the steering wheel and rack are not aligned
centered, reposition the serrations at lower side
of the steering joint.
18. Adjust the front toe after installing the gearbox (see
section 18).

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nsxd17041a.pdf

Wiring Locations
EPS CONTROL UNIT
MAIN RELAY BOX
POWER UNIT
TORQUE SENSOR 6-P CONNECTOR/
STEERING WHEEL SPEED SENSOR
4-P CONNECTOR
STEERING GEARBOX
(TORQUE SENSOR/STEERING WHEEL
SPEED SENSOR)
UNDER-DASH FUSE/RELAY BOX
TRANSMISSION CONTROL MODULE (TCM)
22-P CONNECTOR
VEHICLE SPEED SENSOR
(VSS)
ALTERNATOR 4-P CONNECTOR
EPS INDICATOR LIGHT

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nsxd17030a.pdf

Manual Steering
Ball Joint Boot Replacement
1 . Remove the circlip and the boot.
CAUTION: Do not contaminate the boot installation
section with grease.
2. Pack the interior of the boot and lip with grease.
LIP
BOOT INSTALLATION SECTION
3. Wipe the grease off the sliding surface of the ball
pin, then pack the lower area with fresh grease.
CAUTION:
BALL PIN TAPERED SECTION
BOOT INSTALLATION
SECTION
4. Install the boot in the groove of the boot installation
section securely, then bleed air.
5. Insert the special tool into the threads in the ball pin
and align the end of the tool with the groove in the
boot.
Slide the set ring over the tool and into position.
BOOT
BALL JOINT
BOOT CLIP
GUIDE
07MAG-SL00100
Adjust the depth
by turning the tool.
CAUTION: After installing the boot, check the ball
pin tapered section for grease contamination and
wipe it off if necessary.
SET RING
Keep grease off the boot installation section and
the tapered section of the ball pin.
Do not allow dust, dirt, or other foreign materi-
als to enter the boot.

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nsxd17073a.pdf

Power Unit
Replacement
1. Remove the floor mat and speaker cover.
2. Disconnect the connector from the speaker and re-
move the speaker by removing the bolt and nut.
SPEAKER COVER
5. Remove the power unit by disconnecting the con-
nector.
10 N.m
(1.0 kg-m, 7 lb-ft)
3. Remove the power unit bracket.
4. Bend terminal nut tabs back and remove the ter-
minal nuts and disconnect the cables from the
power unit terminals.
Installation is the reverse order of removal.
NOTE:
SPEAKER
TERMINAL NUT
10 N·m
(1.0 kg-m, 7 Ib-ft)
BRACKET
POWER UNIT
10 N·m
(1.0 kg-m,
7 Ib-ft)
POWER UNIT
After tightening the terminal nuts, bend up the
terminal nut tabs against the nut securely.
Turn the ignition switch ON and check the EPS
indicator light for operation.

Attachments