1991 ACURA NSX key

Security Alar m Syste m
Descriptio n
This syste m is activate d automaticall y 1 5 second s afte r everythin g ha s bee n close d an d locked . Th e securit y alar m syste m
indicato r ligh t locate d o n th e driver' s doo r pane l wil l flas h afte r th e door s ar e properl y locked .
I f an y o f th e followin g condition s occur , th e horn s wil l sound , th e headlight s wil l po p u p an d flash , an d th e sid e marke r
lights , parkin g light s an d taillight s wil l flas h fo r abou t tw o minutes , o r unti l th e syste m is disarme d b y unlockin g eithe r
doo r fro m th e outsid e wit h th e key .
Doo r i s opene d forcibly .
Engin e compartmen t li d i s opened .
Trun k li d i s opene d withou t usin g th e key .
Hoo d is opened .
Roof i s unlatche d (NSX- T "ope n top") .
Flowchar t o f th e securit y alar m syste m operation : Batter
y terminal(s ) i s (are ) remove d an d reconnected .
Engin e starte r circui t an d batter y circui t ar e bypasse d
b y breakin g th e ignitio n switch .
Hood/engin e compartmen t lid/trun k li d opene r o r roo f
releas e leve r (NSX- T "ope n top" ) i n th e vehicl e i s
operated .
Remove th e ke y fro m th e ignitio n switc h
• Ignitio n ke y switc h OF F
Clos e al l th e doors , hood , engin e com -
partmen t lid , an d trun k lid . Th e roo f ca n
b e unlatche d o r latched .
NOTE : Bot h roo f loc k switche s hav e t o
b e in th e sam e position .
• Bot h doo r switche s OF F
• Engin e compartmen t li d switc h OF F
• Hoo d switc h OF F
• Trun k li d switc h OF F
• Bot h roo f loc k switche s OF F o r O N
(NSX- T "ope n top" )
Loc k th e driver' s o r passenger' s doo r fro m th e out -
sid e b y usin g th e key .
• Doo r loc k kno b switche s OF F
• Doo r ke y cylinde r switc h OF F
(PREARMED )
15 se c passed ?
The securit y alar m syste m is armed .
t o pag e 23-31 3 Th
e securit y alar m syste m is disarmed .
Doo r switc h (Driver/Passenger ) O N
Doo r loc k kno b switc h O N
Trun k li d switc h O N
Ignitio n ke y switc h O N
Onl y on e o r bot h roo f loc k switche s O N
(NSX- T "ope n top" ) Fro
m pag e ( 23-313 )
Indicato
r start s flashing .
1 se c O N / 1 se c OF F
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From pag e 23-31 2
Indicato r flashes .
0.2 se c O N / 2. 4 se c OF F
Wan t th e syste m disarmed ?
(ARMED)
Trunk opene d b y key ?
Trun k li d switc h O N
Trun k ke y cylinde r switc h
Illegal activit y
1. Doo r i s opene d forcibly . o r
2 . Engin e compartmen t li d i s opened . o r
3. Trun k li d is opene d withou t usin g th e key . o r4. Hoo d is opened . o r
5 . Batter y terminal(s ) is(are ) disconnecte d
an d reconnected . o r
6. Engin e starte r circui t an d batter y circui t ar ebypasse d b y breakin g th e ignitio n switch . o r7. Hood/engin e compartmen t lid/trun k li d opene r o r roo f
releas e leve r (NSX- T "ope n top" ) i s operated . o r
8 . Stere o radio/cassett e playe r i s disconnected .
Alar m
The horn s soun d an d headlights , sid e marke r light s an dtaillight s flas h repeatedl y fo r tw o minutes .Engine starte r circui t interrupted .
About tw o minute s passed ?Want th e syste m disarmed ?
Either doo r i s unlocke d b y usin g th e key .
• Eithe r doo r ke y cylinde r switc h
Th e securit y alar m syste m is disarmed .
Indicato r stop s flashing . (T
o pag e
23-312 )
Rear m th e securit y alar m system ?
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Security Alar m Syste m
Indicato r Replacemen t
1. Remov e th e doo r pane l (se e sectio n 20 ).
2 . Remov e th e tw o screw s fro m th e indicator .
3 . Remov e th e indicato r fro m th e doo r panel .
5-P CONNECTO RINDICATO
R
DOOR PANE L
Trunk Ke y Cylinde r Switc h Tes t
1. Ope n th e trun k li d an d remov e th e trun k rea r panel .
2 . Disconnec t th e 2- P connecto r fro m th e trun k ke y
cylinde r switch .
3 . Chec k continuit y a t th e switc h connecto r terminals .
• Ther e shoul d b e continuit y betwee n th e terminal s
whe n th e trun k loc k i s turne d t o UNLOC K wit h
the key .
• Ther e shoul d b e n o continuit y whe n th e loc k i s
released .
TRUNK KE Y
CYLINDE R SWITC H
2-PCONNECTO RTRUN
K KE Y
CYLINDE R
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Cylinder Head/Valve Train
Illustrated Index

CAUTION: To avoid damaging the cylinder head, wait

until the engine coolant temperature drops below
100 °F (38 °C) before removing it.NOTE:

CAP NUT

6 x 1.0 mm
10 N .
m
(1.0 kg-m,

7 Ib-ft)
CYLINDER

HEAD COVER

WASHER AND

GROMMET

After installation, fill the engine with oil up to the

specified level, run the engine for more than 3

minutes, then check for oil leakage.

When installing the new crankshaft;

tighten the crankshaft pulley bolt to 280 N .
m (28

kg-m, 203 Ib-ft),

loosen bolt.


retighten it to

250 N .
m (25 kg-m, 181 Ib-ft).

CYLINDER HEAD

COVER
RUBBER SEALS
Replace when damaged

or deteriorated.

6 x 1.0 mm
12N .
m (1.2 kg-m,

9 Ib-ft)

TIMING BELT
REAR MIDDLE

COVER

TIMING BELT
FRONT MIDDLE

COVER
ADJUSTING BOLT

10 x
1.25
mm

43N .
m (4.3 kg-m,

31 Ib-ft)

For adjustment only,
do not remove.

ALTERNATOR

BELT

Adjustment,
section 23

6 x 1.0 mm
12N .
m
(12
kg-m.

9 Ib-ft)

CRANKSHAFT PULLEY
Remove any oil.

SPECIAL BOLT
16x 1.5 mm

250N .
m (25 kg-m,

181 Ib-ft

Tightening torque for
a new crankshaft.

203

Apply oil to
the bolt threads, but not
to the surface that contacts the washer.
6 x 1.0 mm

12N .
m (1.2 kg-m,

9 Ib-ft)
AIR CONDITIONING (A/C) BELT
Adjustment, section 22
6x 1.0 mm

12N .
m (1.2 kg-m, 9 Ib-ft)

(cont'd)

A/C ADJUSTING

PULLEY BRACKET

RUBBER SEAL
Install with concave

surface facing out.

Remove any oil.
TIMING BELT

DRIVE PULLEY

Remove any oil.

Install with concave
surface facing in.
Remove any oil.

TIMING BELT

Inspection, page 6-22
Adjustment, page 6-22 Replacement, page 6-23 to 26
RUBBER SEALS

Replace when damaged
or deteriorated.
CAP NUT

6 x 1.0 mm

10N .
m (1.0 kg-m,

7 Ib-ft)

TIMING BELT

LOWER COVER

RUBBER SEAL
KEY

Remove any oil.

TENSIONER

280

250N.m

25
kg-m,
181 Ib-ft)

(28
0
0
0

Use new O-rings and gaskets when reassembling.

Replace rubber seals, if damaged or deteriorated.

Prior to installing the cylinder head cover, apply a thin

layer of liquid gasket to the mating surface of the

cylinder head cover and rubber seals to prevent the
rubber seal from falling off.ProCarManuals.com

Installation

CAUTION: Do not rotate the crankshaft or camshaft without installing the belt. The piston could hit a valve
and damage may result.
1 . Install the timing belt in the reverse order of removal; Only keypoints are described here.
2 . Remove all spark plugs.
3. Position the crankshaft and the camshaft pulley as shown before installing the timing belt.
A Set the crankshaft so that the No. 1 piston is at top dead center (TDC).NOTE: Turn the crankshaft until its keyway
is facing up.
B Align the TDC mark on the front exhaust camshaft pulley and front intake camshaftpulley to the pointer on the front timing belt
cover plate.
C Align the TDC mark on the rear intake cam-
shaft pulley to the pointer on the rear timing
belt cover plate.
D Align the rear exhaust camshaft pulley one half tooth clockwise past TDC.
POINTER ON REAR
COVER PLATE
REAR EXHAUSTCAMSHAFT PULLEY

TIMING BELT
DRIVE PULLEY
(CRANKSHAFT)
FRONT EXHAUST

CAMSHAFT PULLEY

(cont'd)
5. Tension the timing belt between the pulleys in the
sequence A to E as shown above.
4. Install the timing belt in the sequence shown.

FRONT INTAKE
CAMSHAFT PULLEY
REAR INTAKE
CAMSHAFT PULLEY
Rear exhaust camshaft pulley.
Timing belt drive pulley (crankshaft)

Ad-

Water

justing pulley
Front intake camshaft pulley Front exhaust camshaft pulley
pump pulley Rear intake camshaft pulley Refer to page 6-22 for timing belt tension ad-

justment.ProCarManuals.com

Camshafts

Installation

CAUTION: Valve locknuts should be loosened and ad-

justing screws backed off before installation.

1. After wiping down the cam and journals in cylinder

head, lubricate both surfaces and install camshaft.

2. Turn the camshaft until its keyway is facing up. (No.

1 cylinder TDC).

3. Set a new O-ring and a dowel pin in the oil passage

of the No. 1 camshaft holder.

O-RING

(Replace.)

and

DOWEL PIN
Keyways

facing up.

4. Install the camshaft seal with the open side (spring)

facing in.

Lubricate cam lobes after reassembly.

CAMSHAFT SEAL

Seal housing surface should be dry.

Apply a light coat of oil to camshaft

and inner lip of seal. (cont'd)
After installing the rocker shaft orifice, try to

turn the rocker shaft to make sure that the

orifice has been inserted in the hole of rocker

shaft correctly. If the orifice is in place, it should

not turn.

Remove the rubber bands after installing the

rocker arms.
O-RING

Replace.
ROCKER SHAFT

ORIFICES
O-RING

Replace.
3. Install the orifices. If the holes in the rocker arm

shafts and the cylinder head are not in line with

each other, use a 12 x 1.25 mm bolt in the rocker

arm shaft to rotate the shaft.
ROCKER SHAFT

12 x
1.25
mm

BOLT
12 x
1.25
mm

BOLT
ROCKER SHAFT
ROCKER ARMS
RUBBER BAND
1. Install the lost motion assemblies.

2. Install the rocker arms while passing the rocker arm

shaft through the cylinder head.
Rocker Arms

Installation

Valve adjusting lockouts should be loosened and

adjusting screws backed off before installation.

The component parts must be installed in the

original locations.
Install the rocker arms in the reverse order of removal:

CAUTION:ProCarManuals.com

Gearshift Selector

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
23-328).

Replace the entire affected SRS harness assembly if

it has an open circuit or damaged wiring.

CAUTION:

SELECT LEVER KNOB
3 N.
m

(0.3 kg-m, 2 Ib-ft)
SRS MAIN

HARNESS

SILICONE GREASE

3 N .
m

(0.3 kg-m, 2 Ib-ft)
Apply non hardening
thread lock sealant.
SHIFT INDICATOR PANEL
KEY CYLINDER

3 N .
m

(0.3 kg-m, 2 Ib-ft)

5 N.
m (0.5 kg-m, 4 Ib-ft)

A/T GEAR
POSITION

SWITCH

SILICONE

GREASE

LEVER COVER

SHIFT INDICATOR
3 N .
m (0.3 kg-m, 2 Ib-ft)

SHIFT CABLE

SILICONE GREASE
10 N.
m

(1.0 kg-m, 7 Ib-ft)

SHIFT LOCK
SOLENOID

E-CLIP

3 N .
m

(0.3 kg-m, 2 Ib-ft)

DETENT COVER
DETENT
PLATE

10 N
.
m (1.0 kg-m, 7 Ib-ft)

BRACKET BEAM

SHIFT CABLE HOLDER

Install in this direction.

CONTROL

LEVER PIN

LOCK PIN

SELECTOR MOUNT

BRACKET

SILICONE
GREASEProCarManuals.com

Component Location
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 23). Before removing the gearbox, remove the ignition key to lock the steering shaft from turning.
After installing the gearbox, check the wheel alignment and adjust if necessary.
STEERING WHEEL/AIRBAG ASSEMBLY

Removal, 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 17-19 Disassembly, page 17-22

Inspection, page 17-21

Reassembly, page 17-25ProCarManuals.com