1991 ACURA NSX key

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

CLAMP

CLIP

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

WASHERSProCarManuals.com

Component Location

Index

NOTE:

EPS CONTROL UNITReplacement, page 17-74
POWER UNIT
Replacement, page 17-73
STEERING WHEEL/
AIRBAG ASSEMBLYRemoval, page 17-8
Disassembly, page 17-9

Installation, page 17-10

STEERING COLUMN
Removal, page 17-12

Inspection, page 17-14

Installation, page 17-15

STEERING GEARBOX Removal/Installation, page 17-64

Illustrated Index, page 17-68

Pinion Preload Inspection, page 17-69

Rack Guide Screw Adjustment, page 17-69
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 23).
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.ProCarManuals.com

Power 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

CLAMP

CLIP

2. Remove the steering joint bolts, and disconnect the steering joint by moving the joint toward the

STEERING JOINT

column.

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 secion 1).
5. Remove the front wheels.
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 for how to use the ball joint remover.
8. Separate the tie-rod ball joint and knuckle using the special tool.
CAUTION: Avoid damaging the ball joint boot.
NOTE: If necessary, apply penetrating type lubricant

to loosen the ball joint.

BALL JOINT REMOVER, 28 mm

07MAC-SL00200

CASTLE NUT

44 N .
m (4.4 kg-m, 32 Ib-ft)

COTTER PIN

Replace.
10 mm HEX NUT

Corrosion resistant bolt/nut

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

SPARE TIRE

HOLDER

FLOOR UNDER

COVER

8 x
1.25
mm

BOLT

WASHERS

25 N .
m

(2.5 kg-m, 18 Ib-ft)

Corrosion resistant bolt/nut

TOOTHED LOCK

WASHERS

(1.0 kg-m, 7 Ib-ft)ProCarManuals.com

Ignition Switch

Steering Lock Removal/Installation (cont'd)

10. Insert the key and turn it to "I".

STEERING LOCK

BODY

11. Push the lock pin and pull out the steering lock

assembly.

TWIST-OFF PORTION
SHEAR BOLT
Installation:

1. Turn the key to "I", push the pin and insert the

steering lock assembly into the steering column un-

til it clicks into place.

2. Loosely tighten the new shear bolt. Make sure the

projection on the ignition switch is aligned with the

hole in the steering column.

3. Insert the ignition key and check for proper opera-

tion of the steering wheel lock and that the ignition

key turns freely.

4. Tighten the shear bolt until the hex head twists off.ProCarManuals.com

Speedometer/Trip Meter/Odometer
Troubleshooting (cont'd)
(From previous page)
Reconnect the 3-P connector at
the vehicle speed sensor (VSS).

Raise the rear of the car and sup-

port it with stands.

Back-probe the YEL/RED wire and

connect it to body ground through a voltmeter.

Put the car in neutral with key ON.

Slowly rotate one wheel with the
other wheel blocked. Does voltage pulse from 0 to about 12 V?
Disconnect the 30-P connector at
the speedometer.

Back-probe the YEL/RED wire and

connect it to body ground through a voltmeter.
Slowly rotate one wheel with the
other wheel blocked.
Does the volt meter indicate pulsing voltage?

Replace the speedometer.
Repair open in the YEL/RED wire,

between the VSS and the

speedometer.
Replace the VSS (see page

23-133).ProCarManuals.com

Power Door Locks
Component Location Index
UNDER-HOOD FUSE/BELAY BOX
Located at right side offront compartment

IGNITION KEY SWITCH

Test, page 23-167

DRIVER'S DOOR LOCK SWITCH

Test
,
page 23-260

DRIVER'S DOOR LOCK
ACTUATOR ASSEMBLY

Test
,
page 23-258Replacement
,
section 20

DRIVER'S DOOR SWITCH

Test, page 23-198

PASSENGERS'S DOOR LOCK
ACTUATOR ASSEMBLY

Test
,
page 23-259Replacement
,
section 20

PASSENGER'S DOOR SWITCH

Test
,
page 23-198

PASSENGER'S DOOR LOCK

SWITCH

Test
,
page 23-260

POWER DOOR LOCK
CONTROL UNIT

Inpu
t
Test,
ProCarManuals.com

No.

1

2

3

4

5

6

7

8
9

Wire

BLK

ORN

GRN/WHT2
WHT/YEL

BLK/WHT
BLK/RED

BLU/WHT

BLU/RED1

GRY/WHT

GRN/YEL2
GRN/BLU

GRN/RED

BLU/GRN

WHT/RED
and

YEL/RED
Test condition
Under all conditions.
Under all conditions.Driver's door lock
switch in LOCK.
Driver's door lock
switch in UNLOCK.Passenger's door lock
switch in LOCK.
Passenger's door lock
switch in UNLOCK.
Driver's door lock knob
in LOCK.
Driver's door lock knob
in UNLOCK.
Passenger's door lock key cylinder switch in

LOCK.

Passenger's door lock
key cylinder switch in

UNLOCK.

Driver's door open.
Passenger's door open.
Ignition key is inserted

into the ignition switch.

Connect the ORN termi-
nal to the WHT/RED ter-

minal, and the YEL/RED
terminal to the BLK ter- minal momentarily.
Connect the ORN ter- minal to the YEL/RED
terminal, and the
WHT/RED terminal to
the BLK terminal momentarily. Test: Desired result
Check for continuity to

ground: There should be
continuity.

Check for voltage to ground:
There should be battery
voltage.

Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground: There should be 1 V or less.
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 1 V or less.
Check door lock operation:
Both doors should lock as
power and ground are con-
nected momentarily.
Check door lock operation:
Both doors should unlock as
power and ground are con-
nected momentarily. Possible cause if result is not obtained
Poor ground (G401, 402)

An open in the wire.

Blown No. 35 (20A) fuse.
An open in the wire.
Faulty driver's door lock switch.
Poor ground (G401, 402).
An open in the wire.
Faulty passenger's door lock
switch.
Poor ground (G401, 402).
An open in the wire.
Faulty driver's door lock actuator.
Poor ground (G401, 402).
An open in the wire.
Faulty passenger's door lock
actuator.
Poor ground (G401, G402).
An open in the wire.
Faulty door switch.
Poor ground (G401, G402).
An open in the wire.
Faulty ignition key switch.
Poor ground (G401, 402).
An open in the wire.
Faulty actuator.
An open in the wire.
CAUTION: To prevent damage to the motor, connect power and ground only momentarily.ProCarManuals.com

Security Alarm System

Ignition Key Switch Test

CAUTION: All SRS wiring harnesses are covered with yellow
outer insulation. Before disconnecting any part of the SRS wire
harness, install the short connectors (see page
24-10).
Replace the entire affected SRS harness assembly it
it has an open circuit or damaged wiring.
1. Remove the dashboard lower cover and knee
bolster pad.

DASHBOARD LOWER

COVER

2. If necessary, remove the knee bolster.

3. Disconnect the 8-P connector from the floor wire
harness.

4. Check switch continuity.
There should be continuity between the No. 8

and No. 7 terminals with the ignition key in-

serted into the ignition key cylinder.
There should be no continuity with the ignition

key removed.

KNEE BOLSTER
KNEE BOLSTER PAD
View from wire sids.
ProCarManuals.com