1991 ACURA NSX key

Timing Belt

Installation

Install the timing belt in the reverse order of removal;

Only key points are described here.

NOTE: Clean the middle and lower covers before instal-

lation.

1. Set the timing belt drive pulley so that the No. 1 pis-

ton is at top dead center (TDC). Align the mark on

the teeth side of the timing belt drive pulley to the

pointer on the oil pump.

POINTER

MARK

KEY

TIMING BELT

DRIVE PULLEY

Clean.

2. Set the front camshaft pulleys so that the No. 1 pis-

ton is at TDC. Align the TDC marks on the front

exhaust camshaft pulley and front intake camshaft

pulley to the pointer on the back cover.

Pointer on the

back cover.

FRONT INTAKE

CAMSHAFT PULLEY
FRONT EXHAUST

CAMSHAFT PULLEY

TDC MARKS
3. Set the rear camshaft pulleys so that the No. 1 pis-

ton is at TDC. Align the TDC mark on the rear intake

camshaft pulley to the pointer on the back cover.

Align the rear exhaust camshaft pulley one half

tooth clockwise past TDC.

REAR EXHAUST

CAMSHAFT PULLEY
Pointer on the

back cover.
REAR INTAKE

CAMSHAFT PULLEY

TDC MARKS

4. Install the timing belt tightly in the sequence shown.

Timing belt drive pulley (crankshaft)

Adjusting pulley Front exhaust camshaft pulley

Front intake camshaft pulley Water pump

pulley Rear intake camshaft pulley Rear

exhaust camshaft pulley.

NOTE: Make sure the timing belt drive pulley and

camshaft pulleys are at TDC.

5. Tension the timing belt between the pulleys in the

sequence A to E as shown below.ProCarManuals.com

Camshafts
Installation
CAUTION : Valv e locknut s shoul d b e loosene d an d ad -
justin g screw s backe d of f befor e installation .
1 . Afte r wipin g dow n th e camshaf t an d journal s i n th e
cylinde r head , lubricat e bot h surface s an d instal l th e
camshaft s an d rubbe r caps.
NOTE : Appl y liqui d gaske t aroun d th e rubbe r cap .
2 . Tur n th e camshaft until it s keywa y i s facin g up . (No . 1
cylinde r TDC) .
3 . Se t a ne w O-rin g an d a dowe l pi n i n th e oi l passag e
o f th e No . 1 camshaf t holder .
4 . Instal l th e camshaf t seal s wit h th e ope n sid e
(spring ) facin g in .
ProCarManuals.com

Crankshaft
Inspection
• Clea n th e crankshaf t oi l passage s wit h pip e
cleaner s o r a suitabl e brush .
• Chec k th e keywa y an d threads .
Alignmen t
• Measur e runou t o n al l mai n journal s t o mak e
sur e th e cran k i s no t bent .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Crankshaf t Tota l Indicate d Runout :
Standard (New) : 0.01 5 m m (0.000 6 in ) max .
Servic e Limit : 0.0 3 m m (0.001 2 in )
DIA L INDICATO RRotate tw o complet erevolutions .
Support wit h lathe -type too l o r V-blocks .
Out-of-Roun d an d Tape r
• Measur e out-of-roun d a t th e middl e o f eac h ro d
an d mai n journa l i n tw o places .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Journa l Out-of-Round :
Standard (New) : 0.00 4 m m (0.000 2 in ) max .
Servic e Limit : 0.00 6 m m (0.000 2 in )
Measur e tape rat edges .Measur e out-of -round a t middle .
• Measur e tape r a t edge s o f eac h ro d an d mai n
journal .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Journa l Taper :
Standar d (New) : 0.00 5 m m (0.000 2 in ) max .
Servic e Limit : 0.01 0 m m (0.000 4 in )
ProCarManuals.com

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
7. Install the 10 mm hex nut on the balt 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. Refer to page 18-21('93-'96),('91-'92)

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 lubri-

cant to loosen the ball joint.

BALL JOINT REMOVER. 28 mm

07MAC–SL00200

CASTLE NUT

44 N·m (4.4 kg-m, 32 Ib-ft)

10 mm HEX NUT

CLAMP

CLIP
COTTER PIN

Replace.

On reassembly, bend

the cotter pin as shown.

Corrosion resistant bolt/nut

9. Remove the folding spare tire and spare tire holder plate,
10. Disconnect the battery negative terminal, then dis- connect the positive terminal and remove the bat-
tery.

11. Remove the spare tire holder and floor under cover.

FLOOR UNDER

COVER
10 N·m

(1.0kg-m, 7lb-ft)

SPARE TIRE

HOLDER

2, Remove the steering joint bolts, and disconnect the
steering joint by moving the joint toward the col-
umn.
STEERING JOINT

TOOTHED LOCK

WASHERS

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 front of the car, and place safety stands in the proper locations (see section 1).
5. Remove the front wheels.
6. Remove the cotter pin from the castle nut, and remove
the
nut.
8 x
1.25
mm

BOLT

WASHERS

25 N·m

(2.5 kg-m, 18 lb-ft)

Corrosion resistant bolt/nut
(cont'd)ProCarManuals.com

Diagnostic Trouble Code (DTC):

1. Stop the engine.

2. Disconnect the service check connector from the connector cover located under the glove box.

Connect the two terminals of the service check connector with a jumper wire.

3. Turn the ignition switch on, but do not start the engine.

4. Record the blinking frequency of the ABS indicator light.

The blinking frequency indicates the diagnostic trouble code (DTC).

CAUTION: Before starting the engine, disconnect the jumper wire from the service check connector, or else the

Malfunction Indicator Lamp (MIL) will stay on with the engine running.

NOTE:

• The ABS control unit can indicate three DTCs (one, two or three problems).

• If the ABS indicator light does not light, see Troubleshooting of ABS Indicator Light Circuit page 19-44.

• If you miscount the blinking frequency, turn the ignition switch off, then turn on to blink the ABS indicator light

again.

• After the repair is completed, disconnect the ABS 2,3 (20A) fuse for at least three seconds to erase the ABS

control unit's memory. Then turn the ignition key on again and recheck.

• The memory is erased if the connector is disconnected from the ABS control unit or the ABS control unit is re-

moved from the body.

• After recording the main and sub-code (if applicable), refer to the Symptom-to-System Chart.ProCarManuals.com

Five-step Troubleshooting

1. Verify The Complaint

Turn on all the components in the problem circuit to

verify the customer complaint. Note the symp-

toms. Do not begin disassembly or testing until you

have narrowed down the problem area.

2. Analyze The Schematic

Look up the schematic for the problem circuit.

Determine how the circuit is supposed to work by

tracing the current paths from the power feed

through the circuit components to ground. If

several circuits fail at the same time, the fuse or

ground is a likely cause.

Based on the symptoms and your understanding of

the circuit operation, identify one or more possible

causes of the problem.

3. Isolate The Problem By Testing The Circuit

Make circuit tests to check the diagnosis you made

in step 2. Keep in mind that a logical, simple pro-

cedure is the key to efficient troubleshooting. Test

for the most likely cause of failure first. Try to make

tests at points that are easily accessible.
4. Fix The Problem

Once the specific problem is identified, make the

repair. Be sure to use proper tools and safe

procedures.

5. Make Sure The Circuit Works

Turn on all components in the repaired circuit in all

modes to make sure you've fixed the entire pro-

blem. If the problem was a blown fuse, be sure to

test all of the circuits on that fuse. Make sure no

new problems turn up and the original problem

does not recur.ProCarManuals.com

Ignition Switc h
Test
1. Remov e th e dashboar d lowe r cove r (se e nex t
column) .
2 . Disconnec t th e 7- P connecto r fro m th e floo r wir e
harness .
3. Chec k fo r continuit y betwee n th e terminal s in eac h
switc h positio n accordin g t o th e table.
WHT (BAT-A )
BLU/WH T (IG2-B ) Vie
w fro m
wir e sid e
BLK/WH T (ST )
WHT/BL K (BAT-B )
WHT/RE D (ACC )
Electrica l Switc h Replacemen t
1. Remov e th e dashboar d lowe r cove r an d disconnec t
th e floo r wir e harnes s connectors .
DASHBOAR D
LOWE R
COVE R
2. Disconnec t th e 7- P connecto r fro m th e floo r wir e
harness .
3. Inser t th e key , an d tur n it t o "0" .
4. Remov e th e tw o screws , an d replac e th e switch .
LOCK CYLINDE R
SWITC H
WHT
(IG2-A ) 7-
P CONNECTO R
BLK/YEL (IG1)
ProCarManuals.com

Ignition Switch

Steering Lock Removal/Installation

6. Disconnect the ignition switch 7-P and 8-P connec-

tors.

7. Remove the column holder mounting bolts and the

mounting nuts, and lower the steering column

assembly.

CAUTION: Be careful not to damage the SRS wire

harness.

16 N-m

(1.6 kg-m, 12 Ib-ft)

39 N-m

(3.9 kg-m, 28 Ib-ft)

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

with a 5 mm (3/16 in) drill bit.

CAUTION: 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.

SHEAR BOLT

/

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