1997 ACURA NSX steering wheel

Construction and Function (cont'd)
System Description

Fail-Safe Function

If the control unit detects an abnormality, it shuts the

traction control system off and causes the TCS indicator

light to come on. However if the abnormality is detected

while the TCS is activated, the control unit first estab-

lishes the appropriate wheel spin velocity, then shuts

the system down, thus preventing excessive wheel spin.

Self-Diagnosis Function

If the control unit detects an abnormality, it records a

Diagnostic Trouble Code (DTC) which can be used to

diagnose the problem. The DTC is shown at the TCS

indicator light when the Service Check connector termi-

nals are connected with the SCS service connector.

Steering Angle Detection

Steering angle is detected by the steering angle sensor,

located on the steering column. The sensor uses two

magneto-resistor (MR) elements to determine steering

angle and direction of rotation. When the driver turns

the steering wheel, a magnet in the steering shaft gener-

ates waves in the "MR" elements. These waves are

amplified and converted into signals which the control

unit can interpret as angle and direction of turn.

Vehicle Speed Detection

Wheel rotation speed is detected by the wheel sensors,

located at each wheel. The signals are sent to the con-

trol unit, which compares each wheel's speed and deter-

mines whether traction control is required.ProCarManuals.com

Ignition Switch

Steering Lock Removal/Installation (cont'd)

8. Center-punch the shear bolt, and drill its head off

with a 5 mm (3/16 in) drill bit. Do not damage the

switch body.

9. Remove the shear bolt from the switch body.

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

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

assembly.

STEERING LOCK

BODY
Installation:

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

steering lock assembly into the steering column

until 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.

5. Install in the reverse order of removal. Install the 3P

connector harness carefully because this harness

serves as communication link.

SHEAR BOLT

TWIST-OFF PORTION

6. After installing, check the immobilizer system.ProCarManuals.com

Supplemental Restraint System (SRS)

Steering-related Precautions

Steering Wheel and Cable Reel Alignment:

NOTE: To avoid misalignment of the steering wheel

or airbag on reassembly, make sure the wheels are

turned straight ahead before removing the steering

wheel.

Rotate the cable reel clockwise unit it stops.

Then rotate it counterclockwise (approximately two

turns) until:

—The yellow gear tooth lines up with the mark on

the cover.

—The arrow on the cable reel label points straight up.

ARROW

MARK

YELLOW GEAR TOOTH

ALIGNMENT MARK
Steering Column Removal:

CAUTION:

• Before removing the steering column, first

disconnect the connector between the cable reel

and the SRS main harness.

• If the steering column is going to be removed

without dismounting the steering wheel, lock the

steering by turning the ignition key to 0-LOCK

position or remove the key from the ignition so

that the steering wheel will not turn.

SRS MAIN

HARNESS

CABLE REEL

CONNECTOR

HOLDER

Steering wheel:

Do not replace the original steering wheel with any

other design, since it will make it impossible to pro-

perly install the airbag (only use genuine Honda

replacement parts).

After reassembly confirm that the wheels are still

turned straight ahead and that the steering wheel

spoke angle is correct. If minor spoke angle adjust-

ment is necessary, do so only by adjusting the tie-rods,

not by removing and repositioning the steering wheel.
CABLE REELProCarManuals.com

Airbag Assembly Installation

CAUTION:

• Be sure to install the SRS wiring so that it is not pin-

ched or interfering with other car parts.

• Be sure the battery cables are disconnected.

• After completing repair work, be sure to remove the

short connectors (RED) and reconnect all the con-

nectors.

Driver's Airbag:

1. Place the driver's airbag assembly in the steering

wheel, and secure it with new Torx bolts.

TORX BOLT

9.8 N-m (1.0 kgf-m,

7.2 Ibf-ft) Replace.

Use a Torx T30 bit

TORX BOLT

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit
DRIVER'S

AIRBAG ASSEMBLY
Passenger's Airbag:

2. Place the passenger's airbag assembly in the

dashboard.

3. Press the airbag assembly downwards, and turn the

adjusting nut until it touches the lower part of the

airbag assembly. Then, turn it back half a turn so

that there is a small gap between adjusting nut and

the airbag assembly.

4. Install the bracket and mounting nuts.

5. Tighten the three airbag mounting nuts, then

tighten the two mounting nuts on the bracket.

PASSENGER'S

AIRBAG

ASSEMBLY

ADJUSTING

NUT

BRACKET
ADJUSTING

NUT

PASSENGER'S

AIRBAG

ASSEMBLY

AIRBAG ASSEMBLY

MOUNTING NUTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.
BRACKET

MOUNTING

NUTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.ProCarManuals.com

6. Disconnect the connector between the cable reel

and SRS main harness.

7. Remove the driver's airbag assembly from the

steering wheel, then remove the steering wheel

nut.

STEERING WHEEL NUT

TORX BOLT

Use a Torx T30 bit
DRIVER'S

AIRBAG ASSEMBLY

8. Disconnect the connectors from the horn and

cruise control set/resume switches, then remove

the cable reel 3P connector from its clips.

CRUISE CONTROL

SET/RESUME SWITCH

CONNECTOR

HORN

CONNECTOR

CABLE REEL

3P CONNECTOR
9. Remove the steering wheel from the column.

10. Remove the cable reel and cancel sleeve.

CABLE REEL

CANCEL SLEEVEProCarManuals.com

Supplemental Restraint System (SRS)

Cable Reel Installation

CAUTION:

Before installing the steering wheel, the front wheels

should be aligned straight ahead.

Be sure to install the harness wires so that they are

not pinched or interfering with other car parts.

After reassembly, confirm that the wheels are still

turned straight ahead and that steering wheel spoke

angle is correct. If minor spoke angle adjustment is

necessary, do so only by adjusting the tie-rods, not

by removing and repositioning the steering wheel.

1. Align the cancel sleeve grooves with the cable reel

projections.

CANCEL SLEEVE

CABLE REEL

GROOVES

PROJECTIONS

2. Carefully install the cable reel and the cancel sleeve

on the steering column shaft.

CABLE REEL

CANCEL SLEEVE

STEERING COLUMN

SHAFT
3. Install the column covers.

4. Center the cable reel.

Do this by first rotating the cable reel clockwise un-

til it stops.

Then rotate it counterclockwise (approximately

two turns) until:

The yellow gear tooth lines up with the align-

ment mark on the cover.

The arrow mark on the cable reel label points

straight up.

ARROW MARK

CABLE REEL LABEL

ALIGNMENT MARK

YELLOW GEAR TOOTH

5. Install the steering wheel, and attach the cable reel

3-P connector to the steering wheel clips.

6. Connect the horn connector and cruise control

connector.

CRUISE CONTROL

SET/RESUME

SWITCH CONNECTOR

HORN

CONNECTOR

CABLE REEL

3P CONNECTORProCarManuals.com

7. Instal l th e steerin g whee l nut .
8 . Instal l th e driver' s airba g assembly .
STEERING WHEE L NU T
4 9 N- m (5. 0 kgf-m , 3 6 Ibf-ft )
Replace .
DRIVER' S AIRBA G
TOR
X BOL T
9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Replace . ASSEMBL Y
Us e a Tor x T3 0 bi t
9. Connec t th e cabl e ree l harnes s t o th e SR S mai n
harnes s belo w th e peda l bracket .
10 . Connec t th e foo t ligh t harnes s an d lights-o n chim e
t o th e dashboar d lowe r cover , the n instal l th e lowe r
cover .
DASHBOAR D
LOWE R COVE R
CHIMEFOOT LIGH T
11. Remov e th e shor t connecto r (RED ) fro m th e
passenger' s airba g an d th e SR S Servic e Connecto r
fro m th e SR S mai n harness .
1 2 . Reconnec t th e passenger' s airba g 3 P connecto r t o
th e SR S mai n harnes s connector , the n reinstal l th e
glov e box .
13 . Remov e th e shor t connecto r (RED ) fro m th e
driver' s airba g an d th e SR S Servic e Connecto r fro m
the cabl e reel .
14 . Reconnec t th e driver' s airba g 3 P connecto r t o th e
cabl e ree l 3 P connector . Attac h th e shor t connecto r
(RED ) t o th e acces s panel , the n reinstal l th e pane l
o n th e steerin g wheel .
15 . Remov e th e shor t connecto r (RED ) fro m bot h sea t
bel t tensioners , the n attac h th e shor t connector s
(RED ) t o thei r holders .
16 . Reconnec t th e floo r wir e harnes s connector s t o th e
driver' s an d passenger' s sea t bel t tensioners .
ProCarManuals.com

Supplemental Restraint System (SRS)

SRS Unit Assembly Installation

CAUTION: Be sure to install the SRS wiring so that it is

not pinched or interfering with other car parts.

1. Install the SRS unit.

TORX BOLTS 6 mm

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit

TORX BOLTS 6 mm

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit

2. Clip the SRS main harness into the harness holder,

then connect the SRS main harness 18P connec-

tor to the SRS unit; push it into position until it

clicks.

3. Install the carpet.
4. Remove the short connectors (RED) from the pas-

senger's airbag, and remove the SRS Service

Connector from the SRS main harness.

5. Reconnect the passenger's airbag 3P connector to

the SRS main harness 3P connector, then reinstall

the glove box.

6. Remove the short connector (RED) from the driver's

airbag, and remove the SRS Service Connector

from the cable reel.

7. Reconnect the driver's airbag 3P connector to the

cable reel 3P connector. Attach the short connec-

tor (RED) to the access panel, then reinstall the

panel on the steering wheel.

8. Remove the short connectors (RED) from both seat

belt tensioners, then attach the short connectors

(RED) to their holders.

9. Reconnect the floor wire harness 3P connectors to

the driver's and passenger's belt tensioners.

10. Reconnect the battery positive cable, then the

negative cable.

11. After installing the SRS unit, confirm proper system

operation:

Turn the ignition switch ON (II); the SRS indicator

light should come on for about six seconds and

then go off.ProCarManuals.com