1991 ACURA NSX clock

Intake Ai r Syste m
Throttl e Cabl e
Inspection/Adjustmen t
1 . Remov e th e accelerato r positio n senso r cover .
2. Chec k tha t th e throttl e cabl e operate s smoothl y wit h
no bindin g o r sticking . Repai r a s necessary .
3 . Chec k cabl e fre e pla y a t th e throttl e linkage . Cabl e
deflectio n shoul d b e 1 0 - 1 2 m m (0.3 9 - 0.4 7 in.) .
ACCELERATO RPOSITIONSENSOR COVE R
DEFLECTIO N10 - 1 2 m m(0.3 9 - 0.47 in. )
LOCKNU T
CABLE
BRACKE T
ADJUSTIN G NU T
4. I f deflectio n i s no t withi n specs , loose n th e locknut ,
tur n th e adjustin g nu t unti l th e deflectio n i s a s spec -
ifie d the n retighte n th e locknut . Installatio
n
1 . Rotat e th e throttl e linkag e counterclockwise , the n
instal l th e throttl e cabl e i n th e throttl e linkag e an d
instal l th e cabl e housin g i n th e cabl e bracket .
THROTTL E LINKAG E
CABLE
BRACKE T
INNERWIRE
LOCKNU TADJUSTIN GNUT
2. Hol d th e cabl e sheath , removin g al l slac k fro m th e
cable .
3. Tur n th e adjustin g nu t unti l i t i s 3 m m (0.1 2 in. )
awa y fro m th e cabl e bracket .
4 . Tighte n th e locknut . Th e cabl e deflectio n shoul d no w
b e 1 0 - 1 2 m m (0.3 9 - 0.4 7 in.) . I f not , se e inspection /
adjustment .
LOCKNUT9.8 N- m(1.0 kgf-m ,
7. 2 Ibf-ft )
ADJUSTIN GNUT
CABL EBRACKE T
3 m m(0.1 2 in. )
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Mainshaft Thrus t Shi m
Adjustmen t
7. Instal l th e bal l bearin g ont o th e mainshaf t usin g th e
specia l tools , the n instal l th e 7 5 m m sprin g washe r
an d mainshaf t assembl y int o th e clutc h housing .
DRIVER, 4 0 m m I.D .07746 - 0030100
ATTACHMENT , 3 5 m m I.D .07746 - 0030400
BAL L BEARIN G
8. Instal l th e transmissio n housing .
Torque : 4 5 N- m (4. 5 kg-m , 3 3 Ib-ft )
9. Chec k th e thrus t clearanc e in th e manne r describe d
below.
NOTE : Carr y ou t th e measuremen t a t norma l roo m
temperature .
a . Slid e th e mainshaf t bas e ove r th e mainshaft ,
b . Attac h th e mainshaf t holde r t o th e mainshaf t a s
follows :
• Back-ou t th e mainshaf t holde r bol t an d
loose n th e tw o he x bolts .
• Fi t th e holde r ove r th e mainshaf t s o it s li p i s
toward s th e transmission .
• Alig n th e mainshaf t holder' s li p aroun d th e
groov e a t th e insid e of the mainshaf t splines ,
then tighte n th e he x bolts .
HEX BOL T
MAINSHAFT
HOLDER BOL T
MAINSHAF THOLDER07GAJ - PG20110
MAINSHAF T BAS E07GAJ - PG20130
c. Sea t th e mainshaf t full y b y tappin g it s en d
wit h a plasti c hammer .
d . Threa d th e mainshaf t holde r bol t i n unti l i t
jus t contact s th e wid e surfac e o f th e main -
shaf t base .
e . Zer o a dia l gaug e o n th e en d o f th e mainshaft .
DIAL GAUG E
f. Tur n th e mainshaf t holde r bol t clockwise ; sto p
turnin g whe n th e dia l gaug e ha s reache d it s
maximu m movement . Th e readin g o n dia l
gauge i s th e amoun t o f mainshaf t en d play .
CAUTION : Turnin g th e shaf t holde r bol t mor e
tha n 6 0 degree s afte r th e needl e o f th e dia l
gaug e stop s movin g ma y damag e th e
transmission .
g. I f th e readin g i s withi n th e standard , th e
clearanc e is correct .
I f th e readin g i s no t withi n th e standard , rechec k
th e shi m thickness .
Standard :
0.14-0.21 mm (0.006-0.00 8 in)
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Preset Torqu e
Inspectio n
On-Car:
1 . Bloc k th e fron t wheels .
2 . Shif t t o low gear .
3 . Lif t u p rea r wheels , an d plac e th e safet y stan d (Lif t
an d Suppor t Points , se e sectio n 1 ).
4 . Measur e prese t torqu e clockwis e usin g a torqu e
wrenc h a s shown .
Standard: 120-280 N-m (12-28 kg-m,
87-20 3 Ib-ft )
Servic e Limit : 6 0 N- m (6 kg-m , 4 3 Ib-ft )
TORQU E WRENC H
RIGH T REA R WHEE L
SAFETY STAN D
5. I f prese t torqu e is les s tha n th e servic e limit , replac e
th e limite d sli p differentia l clutc h set .
NOTE : Adjus t th e 6 5 m m (differentia l housin g cove r
side ) an d 11 2 m m (differentia l housin g cove r side )
shim s wheneve r th e clutc h se t i s replaced . Assembly
:
Plac e on e specia l too l i n a vise . Plac e th e lef t sid e
o f th e differentia l assembl y o n th e specia l tool , the n
prese t th e differentia l wit h 3- 5 rotations , counter -
clockwise .
DIFFERENTIA L
INSPECTIO N TOOL S
07MAJ-PR90100
2. Measur e prese t torqu e counterclockwis e usin g a tor -
qu e wrenc h a s shown.
Standard :
60-140 N- m (6-1 4 kg-m ,
43-10 1 Ib-ft )
Servic e Limit : 3 0 N- m (3 kg-m , 2 2 Ib-ft )
TORQU E WRENC H
DIFFERENTIA L
INSPECTIO N TOOL S
07MAJ-PR90100
3 . I f prese t torqu e is les s tha n th e servic e limit , replac e
th e limite d sli p differentia l clutc h set .
NOTE : Adjus t th e 6 5 m m an d 11 2 m m shim s
wheneve r th e clutc h se t i s replaced .
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Preset Torque

Inspection
On-Car:

1. Lift up right rear wheel,
and place the safety stand.

(Lift and Support Points, see section 1).
2. Block the other three wheels.
3. Measure preset torque clockwise using a torque wrench as shown.

Standard:
60–140 N·m

(6–14 kg-m, 43–101 Ib-ft)

Service Limits: 30 N·m (3 kg-m, 22 Ib-ft)

TORQUE WRENCH
RIGHT REAR WHEEL SAFETY STAND

4. If preset torque is less than the service limit, replace the clutch discs with new ones.
NOTE: Adjust the thrust shim whenever the clutch
discs are replaced (see page 15-22).
Assembly:

1. Place one special tool in a vise. Place the left side of the differential assembly on the special tool, then
preset the differential with 3 – 5 rotations, both
clockwise and counterclockwise.

DIFFERENTIAL
INSPECTION TOOLS

07MAJ– PR90100

2. Measure preset torque clockwise using a torque wrench as shown.

Standard: 60–140 N·m
(6–14 kg-m, 43–101 Ib-ft)

Service Limit: 30 N·m (3 kg-m, 22 Ib-ft)

TORQUE WRENCH
DIFFERENTIAL
INSPECTION TOOLS

07MAJ – PR90100

3. If preset torque is less than the service limit, replace the clutch discs with new ones.
NOTE: Adjust the thrust shim whenever the clutch

discs are replaced (see page 15-22).
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GAUGE ASSEMBLY

EPS INDICATOR LIGHT

UNDER-HOOD FUSE/RELAY BOX

No. 2 (15 A)
IG SW (50 A)

CLOCK (7.5 A)

E-PS
(50 A)

UNDER-DASH FUSE BOX

No. 5 (15 A)ProCarManuals.com

Troubleshooting Precautions

EPS Indicator Light

Under normal conditions, the EPS indicator light in the gauge assembly comes on when the ignition switch is turned to

the ON (II) position, then goes off after the engine is started. This indicates that the bulb and its circuits are operating cor-

rectly. If there is any trouble in the system, the EPS indicator light turns on during driving, and the power steering assist is

turned off. When the EPS indicator light comes on, the control unit memorizes the DTC. In this case, the control unit does

not activate the EPS system after the engine starts again but it keeps the EPS indicator light on.

Diagnostic Trouble Code (DTC)

• The lowest DTC is indicated first.

• The DTCs continue blinking until the ignition switch is turned off.

• The DTCs are erased from the control unit when the EPS control unit VBU power supply or connector is disconnected.

• The EPS system can be reset and the control unit's memory can be erased by disconnecting the CLOCK (7.5 A) fuse for

more than ten seconds.

Self-diagnosis:

The CPU (central processing unit) controls the following when it detects a problem during self-diagnosis:

1. Turns the EPS indicator light ON to alert the driver.

2. Power assist stops, and normal manual steering operation resumes (except DTC 21 and DTC 33).

3. The EPS control unit memorizes the diagnostic trouble code (DTC).

4. After the DTC is stored in the control unit, the CPU stops self-diagnosis.

Troubleshooting:

• Before starting the troubleshooting, clear the DTC by disconnecting the CLOCK (7.5 A) fuse for ten seconds or more,

and test-drive the car. Check that the symptom of the trouble appears again, and then troubleshoot. If the problem is an

intermittent problem, the system does not become active after the engine starts even though the problem is solved.

• When both EPS indicator light and A/T "D" indicator light come on, perform the A/T troubleshooting first.

• When the customer's reported problem cannot be verified in the car, ask the customer about the conditions when the

EPS indicator light came ON, then test-drive the car under those conditions, if possible. If the EPS indicator light does

not come ON during the test, check for loose connections or poor contacts at the connectors by wiggling the harness,

etc.

• The connector terminal numbers are viewed from the wire side for the female terminals and from the terminal side for

the male terminals.

• After the repair, test-drive the car and check that the EPS indicator light does not come ON again during the test. (Refer

to the Symptom-to-System Chart for diagnostic period.)ProCarManuals.com

Diagnostic Trouble Code (DTC) Indication

Example:

1.3 seconds
DTC Indication Pattern:

DTC:
11
DTC:
12

EPS Indicator light ON

EPS Indicator light OFF
0.28 seconds

Repeat

Connect the SCS Turn the ignition

service connector switch ON (II)

0.36 seconds 1.3 seconds

• The DTC is indicated by a series of long and short blinks. One long blink equals 10 short blinks.

Add the long and short blinks together to determine the DTC.

• The DTCs are repeated sequentially beginning with the lowest number.

4. Remove the SCS service connector.

NOTE: The Malfunction Indicator Lamp (MIL) will stay on after the engine is started if the SCS service connector is

connected.

5. Remove the CLOCK (7.5 A) fuse in the under-hood fuse/relay box for more than 10 seconds to erase the EPS control

unit memory.ProCarManuals.com

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 prop-

erly 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 securely

attached to the steering wheel; otherwise, severe per-

sonal injury could result during later airbag deploy-

ment.

1. Before installing the steering wheel, center the

cable reel.

Do this by first rotating the cable reel clockwise

until 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

CABLE REEL

YELLOW GEAR TOOTH

ALIGNMENT MARK
2. Install the steering wheel.

NOTE: Be sure the steering wheel shaft engages

the cable reel.

STEERING WHEEL

NUT

Replace.

50 N-m

(5.0 kg-m, 36 Ib-ft)

PIN

3. Insert the cruise control set/resume 4P connector

and airbag 3P connector to the steering wheel clips.

4. Connect the horn connector.

CRUISE CONTROL

SET/RESUME SWITCHES

4P CONNECTOR

HORN

CONNECTOR

CABLE REEL

CONNECTOR
PINProCarManuals.com