1997 ACURA NSX low beam

Lighting System

HID Lamp System Troubleshooting

1. Check the No. 49 (20 A) or No. 52 (20 A) fuse in the

main under-hood fuse/relay box.

Are the fuses OK?

YES — Go to step 2.

NO — Replace the fuse (s), and recheck.

2. Substitute a known-good HID bulb and recheck.

Does the headlight low beam come on?

YES — Replace the HID bulb.

NO — Go to step 3.

3. Disconnect the 2P connector from the inverter unit.

4. Turn the combination light switch ON.

5. Measure the voltage between the No. 2 terminal of

the inverter unit 2P connector and body ground.
7. Check for continuity between the No. 1 terminal of

the inverter unit 2P connector and body ground.

Is there continuity?

YES — Substitute a known-good inverter, and

recheck. If the symptom/indication goes away,

replace the original inverter unit.

NO — Repair open in the wire between the inverter

unit and body ground. If the wire is OK, check for

poor ground at G202 or G302.ProCarManuals.com

Headlight Low Beam Relay Test

1. Remove the headlight low beam relay from the

under-hood fuse/relay box.

2. Check continuity at the relay terminals.

• There should be continuity between the C and D

terminals.

• There should be continuity between the A and B

terminals when power and ground are connect-

ed to the C and D terminals.

• There should be no continuity between the A

and B terminals when power is disconnected.
Headlight High Beam/Dimmer

Relay (USA) Test

1. Remove the headlight high beam relay or the dimmer

relay (USA) from the under-hood fuse/relay box.

2. Check continuity at the relay terminals.

• There should be continuity between the C and D

terminals.

• There should be continuity between the A and B

terminals when power and ground are connect-

ed to the C and D terminals.

• There should be no continuity between the A and

B terminals when power is disconnected.

• Headlight high beam relay

• Dimmer relay (USA)ProCarManuals.com

Gearbox Removal/Installatio n (Cont'd )
Manual Steerin g
12. Remov e th e flang e bolt s an d nut s fro m th e gearbo x
and fron t crossbeam . 14
. Instal l th e gearbo x i n th e revers e orde r o f removal .
CAUTION : Torqu e th e castl e nu t o f th e tie-ro d en d
t o th e lowe r torqu e specification , the n tighte n it on -
l y fa r enoug h to alig n th e slo t wit h th e pi n hole . D o
no t alig n th e nu t b y loosening .
NOTE : Whe n connectin g th e steerin g joint , mak e
sure tha t th e cabl e ree l o f SR S is centered .
1 5 . Se t th e steerin g rac k i n th e cente r o f it s strokes .
16 . Cente r th e cabl e ree l a s follows :
• Tur n th e steerin g whee l lef t approx . 15 0
degrees , t o chec k th e cabl e ree l positio n wit h
indicator .
• I f th e cabl e ree l i s centered , th e yello w gea r
toot h line s u p wit h th e alignmen t mar k o n th e
cover .
• Retur n th e steerin g whee l righ t approx . 15 0
degree s t o positio n th e steerin g whee l i n th e
straigh t ahea d position .
17 . Sli p th e lowe r o f th e steerin g join t ont o th e pinio n
shaf t (lin e u p th e bol t hol e wit h th e groov e aroun d
the shaft ) an d loosel y instal l th e lowe r bolt .
NOTE :
• B e sur e tha t th e lowe r steerin g join t bol t i s
securel y i n th e groov e i n th e steerin g gearbo x
pinion.
• I f th e steerin g whee l an d rac k ar e no t aligne d
centered , repositio n th e serration s a t lowe r sid e
of th e steerin g joint .
18 . Adjus t th e fron t to e afte r installin g th e gearbo x (se e
sectio n 18 ).
13
. Remov e th e steerin g gearbo x fro m th e fron t cross -
beam b y removin g th e flang e bolts .
ProCarManuals.com

Cylinder Heads

Installation (cont'd)

Rear:

8 x
1.25
mm

22 N-m (2.2 kgf-m,

16 Ibf-ft)
REAR PRIMARY

HEATED OXYGEN SENSOR

(REAR PRIMARY HO2S)

44 N-m (4.5 kgf-m,

33 Ibf-ft)

Be careful not to damage.

GASKET

Replace.

REAR EXHAUST

MANIFOLD

EXHAUST

MANIFOLD

COVER

SELF-LOCKING NUT

8 x
1.25
mm

30 N-m (3.1 kgf-m,

22 Ibf-ft)

Replace.

3. Install the cylinder heads on the engine block.

The cylinder head dowel pins and the head oil con-

trol orifice must be aligned.

• Always use a new cylinder head gasket.

• Clean the oil control orifice before installing.

CYLINDER HEAD

GASKET

Replace.
OIL CONTROL

ORIFICES

Clean.
CYLINDER HEAD

GASKET

Replace.

DOWEL PIN
DOWEL

PINS

O-RING

Replace.
4. Tighten the cylinder head bolts sequentially in two

or three steps.

• Apply clean engine oil to the bolt threads and

washer contact surfaces.

Specified Torque

M/T:
11 x 1.5 mm

96 N-m (9.8 kgf-m, 71 Ibf ft)

A/T:
11 x 1.5 mm

76 N-m (7.8 kgf-m, 56 Ibf ft)

NOTE: We recommend using a beam-type torque

wrench. When using a preset-type torque wrench,

be sure to tighten slowly and not to over-tighten.

CYLINDER HEAD BOLTS TORQUE SEQUENCE

CYLINDER HEAD BOLT

M/T:
11 x 1.5 mm

96 N-m (9.8 kgf-m, 71 Ibf-ft)

A/T:
11 x 1.5 mm

76 N-m (7.8 kgf-m, 56 Ibf-ft)

Apply clean engine oil to the

bolt threads and washer contact

surfaces.ProCarManuals.com

Transmission Assembl y
Removal (cont'd )
19. Remov e th e intermediat e shaf t hea t cove r an d th e intermediat e shaf t mountin g bolts .
20 . Pr y th e intermediat e shaf t ou t o f th e differential . Pul l an d remov e it . Coa t al l precisio n finishe d surface s wit h clea n
engin e oi l o r grease . Ti e plasti c bag s ove r th e driveshaf t ends .
21 . Remov e th e parkin g brak e cabl e holde r fro m th e rea r su b frame , an d th e whee l senso r wir e clam p fro m th e lowe r
contro l arm .
22 . Remov e th e flang e bolt , an d separat e th e to e contro l ar m fro m th e sid e bea m (se e sectio n 18 ).
23 . Remov e th e damper fork bol t (se e sectio n 18 ).
24 . Remov e th e adjustin g bolts , an d th e flang e bolt , the n separat e th e lowe r contro l ar m fro m th e sid e beam .
25 . Pr y th e driveshaf t ou t o f th e differential . Pul l an d remov e it . Coa t al l precisio n finishe d surfaces with clea n engin e oi l
o r grease . Ti e plasti c bag s ove r th e driveshaf t ends .
ProCarManuals.com

11. Remove the parking brake cable holders from the rear beam rod.

12. Remove the rear beam rod.

13. Remove the front exhaust pipe A.

14. Remove the parking brake cable holder and the wheel sensor wire clamp.

1 5. Make a reference mark on the flange of the adjusting bolt, adjusting cam and lower control arm.

16. Separate the toe control arm from the side beam.

17. Remove the damper fork bolt.

18. Separate the lower control arm from the side beam.

19. Remove the right driveshaft from the intermediate shaft.ProCarManuals.com

20. Remove the intermediate shaft heat shield cover and the intermediate shaft mounting bolts.

21. Pry the intermediate shaft out of the differential. Pull and remove it.

NOTE:

• Coat all precision finished surfaces with clean engine oil.

• Tie a plastic bag over the intermediate shaft end.
Removal (cont'd)
Transmission

22. Remove the parking brake cable holder and the wheel sensor wire clamp.

23. Make a reference mark on the flange of the adjusting bolt, adjusting cam and lower control arm.

24. Separate the toe control arm from the side beam.

25. Remove the damper fork bolt.

26. Separate the lower control arm from the side beam.

27. Pry the left driveshaft out of the differential. Pull and remove it.

NOTE:

• Coat all precision finished surfaces with clean engine oil.

• Tie a plastic bag over the driveshaft end.ProCarManuals.com

Installation (cont'd)
Transmission

11. Install a new set ring on the end of the left driveshaft and intermediate shaft. Apply a light film of grease around the

set ring grooves, then center the new set ring on the shafts. The grease keeps the set ring centered, making shaft

installation easier.

12. Install the left driveshaft.

13. Install the lower control arm to the side beam.

CAUTION: Line up the reference marks on the adjusting bolt, adjusting cam, and lower control arm.

14. Install the damper fork bolt.

15. Install the toe control arm to the side beam.

CAUTION: Make sure that the reference marks on the toe control arm are aligned.

16. Install the wheel sensor wire clamp and parking brake cable holder.

17. Install the intermediate shaft, and tighten the intermediate shaft mounting bolts to the intermediate shaft support

base.

18. Install the intermediate shaft heat shield cover.ProCarManuals.com