1991 ACURA NSX Service Repair Manual

Warning/Caution Label Locations

A: CABLE REEL CAUTION A

CAUTION:

BEFORE INSTALLING CABLE REEL

CENTER THE FRONT WHEELS.

ALIGN THE MARKS.

READ SERVICE MANUAL.

B: CABLE REEL CAUTION B

CAUTION:

NO SERVICEABLE PARTS INSIDE; DO NOT

DISASSEMBLE OR TAMPER.

C: STEERING WHEEL WARNING
(SUN VISOR)

WARNING

BEFORE INSTALLING STEERING WHEEL:

CENTER THE FRONT WHEELS.

ALIGN THE MARKS. (CABLE REEL)

READ SERVICE MANUAL.

D: BULKHEAD WARNING

WARNING

THIS VEHICLE IS EQUIPPED WITH A DRIVER

AIRBAG AS A SUPPLEMENTAL RESTRAINT

SYSTEM. (SRS)

ALL SRS ELECTRICAL WIRING AND CONNECTORS

ARE COLORED YELLOW.

DO NOT USE ELECTRICAL TEST EQUIPMENT ON

THESE CIRCUITS. TAMPERING WITH OR DISCON-

NECTING THE SRS WIRING COULD RESULT IN

ACCIDENTAL FIRING OF THE INFLATOR OR MAKE

THE SYSTEM INOPERATIVE, WHICH MAY RESULT

IN SERIOUS INJURY.ProCarManuals.com

E: MODULE WARNING
J: STEERING WHEEL WARNING

WARNING

TO PREVENT ACCIDENTAL DEPLOYMENT AND POSSIBLE

INJURY:

ALWAYS INSTALL THE PROTECTIVE SHORT CONNEC-

TOR ON THE INFLATOR CONNECTOR WHEN THE

HARNESS IS DISCONNECTED.

UNDER NO CIRCUMSTANCES SHOULD DIAGNOSIS BE

PERFORMED USING ELECTRICAL TEST EQUIPMENT OR

PROBING DEVICES.

NO SERVICEABLE PARTS INSIDE. DO NOT DISASSEMBLE

OR TAMPER.

STORE THE REMOVED AIRBAG ASSEMBLY WITH THE

PAD SURFACE UP.

FOR SPECIAL HANDLING OR STORAGE REFER TO THE

ACURA SERVICE MANUAL.

DISPOSE OF THE ENTIRE UNIT AS DIRECTED.

F: DRIVER INFORMATION

ALWAYS WEAR YOUR SEAT BELT

THIS CAR IS EQUIPPED WITH A DRIVER AIRBAG AS A

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

IT IS DESIGNED TO SUPPLEMENT THE SEAT BELT.

BEFORE DRIVING READ LABEL INSIDE THE GLOVE

BOX.
K: LABEL
WARNING

TO PREVENT ACCIDENTAL DEPLOYMENT AND POSSIBLE

INJURY:

ALWAYS INSTALL THE PROTECTIVE SHORT CONNEC-

TOR ON THE INFLATOR CONNECTOR WHEN THE

HARNESS IS DISCONNECTED.

L: INFLATOR LABEL

DANGER CONTAINS SODIUM AZIDE AND POTASSIUM

NITRATE.

CONTENTS ARE EXTREMELY FLAMMABLE.

DO NOT DISMANTLE OR INCINERATE.

DO NOT PROBE WITH ELECTRICAL DEVICES.

M: INFLATOR COVER LABEL

DANGER

EXPLOSIVE/FLAMMABLE

CONTACT WITH ACID, WATER, OR HEAVYMETALS

SUCH AS COPPER, LEAD, OR MERCURY, MAY PRODUCE

HARMFUL AND IRRITATING GASES OR EXPLOSIVE COM-

POUNDS. STORAGE TEMPERATURES MUST NOT EX-

CEED 200°F. FOR PROPER HANDLING, STORAGE, AND

DISPOSAL PROCEDURES REFER TO THE ACURA SERVICE

MANUAL, SRS SUPPLEMENT.

POISON

CONTAINS POISONOUS SODIUM AZIDE AND

POTASSIUM NITRATE.

FIRST AID:

IF CONTENTS ARE SWALLOWED, INDUCE VOMITING.

FOR EYE CONTACT, FLUSH EYES WITH WATER FOR 15

MINUTES. IF GASES (FROM ACID OR WATER CONTACT)

AIR INHALED, SEEK FRESH AIR. IN EVERY CASE, GET

PROMPT MEDICAL ATTENTION.

KEEP OUT OF REACH OF CHILDREN.
G: SRS UNIT CAUTION

CAUTION

NO SERVICEABLE PARTS INSIDE.

DO NOT DISASSEMBLE OR TAMPER.

DO NOT DROP.

STORE IN A CLEAN, DRY AREA.

H: STEERING COLUMN CAUTION

CAUTION

I: POCKET INFORMATION
TO AVOID DAMAGING THE SRS CABLE OR REEL, WHICH

COULD MAKE THE SYSTEM INOPERATIVE. REMOVE THE

STEERING WHEEL BEFORE REMOVING THE STEERING

SHAFT CONNECTOR BOLT.

DRIVER'S AIRBAG INFORMATION

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) CAN

PROVIDE ADDITIONAL PROTECTION FOR THE DRIVER

IN A FRONTAL COLLISION. A FUNCTIONAL

DESCRIPTION OF THE SRS IS IN YOUR OWNER'S

MANUAL.

THE SYSTEM MUST BE INSPECTED TEN YEARS AFTER

DATE OF MANUFACTURE, AS NOTED ON THE

CERTIFICATION PLATE.

ANY REPAIR, INSPECTION OR NEARBY ACCESSORY

INSTALLTION SHOULD BE DONE BY AN ACURA

DEALER.

IF YOUR SRS INDICATOR:

LIGHTS WHILE DRIVING OR FLASHES;

FAILS TO LIGHT OR STAYS ON AFTER THE IGNITION

IS FIRST TURNED ON:

SEE YOUR AUTHORIZED ACURA DEALER.ProCarManuals.com

Air Conditioner — Section 22

Electrical — Section 23
Unit of length: mm (in)
See Section 23
1.0-1.1 (0.039-0.043)

M/T: Manual Transmission A/T: Automatic TransmissionProCarManuals.com

SEC
&

PAGE
NOTES

11-112
11-84

11-125
11-128 11-135

23-89
11-134
6-54 ('91-'93) 11-4,

97
11-4

23-94 8-4
8-5

23-107
10-2, 3
10-5
13-3
14-94 ('91-'93)

R = Replace I = Inspect After inspection, clean, adjust, repair or replace if necessary.
Check oil and coolant level at each fuel stop.Under severe driving conditions, service these items more often. For cars sold in California, this service is recommended only; other areas, it is required.
Replace every 6 years or 60,000 miles (96,000 km), whichever comes first.
Tension adjustment only.
Thereafter, replace every 2 years or 30,000 miles (48,000 km), whichever comes first.ProCarManuals.com

R = Replace I = Inspect After inspection, clean, adjust, repair or replace if necessary.

NOTES
SEC
&

PAGE

Severe Driving Conditions Items with an orin the chart will need service more often, if you
drive in some severe conditions.
The conditions are:
A. Repeated short distance driving.
B. Dusty conditions.
C. Severe cold weather.
D. Areas with road salt or other corrosive materials.
E. Rough or muddy roads. The services are:
Clean the air cleaner element every 7,500 miles (12,000 km) or 6 months and replace every
30,000 miles (48,000 km) or 24 months under condition B or E. Replace engine oil and oil filter every 3,750 miles (6,000 km) or 3 months under condition A
or B.
Inspect front and rear brake discs and calipers, and rear brake pads every 7,500 miles (12,000 km) or 6 months under condition A, B, D, or E.
Inspect the power steering system every 7,500 miles (12,000 km) or 6 month under condi-
tion B, C, or E. 6-23 ('91-'93)10-11
11-127
9-4
19-6
19-10
19-20
19-18
19-26
19-4
19-62
19-69
19-41
19-43
19-44
19-62
18-6
17-21 ('91-'93)
17-30 ('91-'93)
17-31 ('91-'93)

18-14,
30
ProCarManuals.com

Oil Level

Engine Oil

Inspection
Replacement

1. Check engine oil with the engine off and the car parked on level ground.
2. Make certain that the oil level indicated on the dipstick is between the upper and lower marks.
3. If the level has dropped close to the lower mark, add oil until it reaches the upper mark.

CAUTION: Insert the dipstick carefully to avoid

bending it.
1. Warm up the engine.
2. Drain the engine oil.

WASHER
Replace.

OIL PAN DRAIN PLUG

45 N·m (4.5 kg-m, 33 Ib-ft)

DIPSTICK

UPPER
LOWER

3. Reinstall the drain plug with a new washer, and
refill with the recommended oil.

Engine Oil Viscosity for Outside Temperature Ranges.
NOTE: Oil filter should be replaced at each oil
change.ProCarManuals.com

Special Tools
Special Tools Page Reference
11-44, 114,

118, 120, 129,
137,
140

11-21, 32, 37
11-21

11-131

11-21

11-139, 140

11-88

Tool Number

A973X-041-XXXXX

KS-AHM-32-003

07LAJ-PT3010A

07LAJ-PT30200

07MAJ-PR70100

07JAZ-001000A

07406-0040001ProCarManuals.com

Component Locations

Index
FRONT KNOCK SENSOR
Troubleshooting, page 11-62
COOLANT TEMPERATURE (TW) SENSOR

Troubleshooting, page 11 - 48

EGR VALVE

Troubleshooting,
page 11-128
FUEL PUMP RESISTOR

Inspection, page 11-106

CRANK/CYL SENSOR

Troubleshooting, page 11-46

CONTROL BOX
page 11-6 THROTTLE

ANGLE

SENSOR

Troubleshooting,
page 11-50
FAST IDLE VALVE

Inspection, page 11-83

EACV

Troubleshooting,

page 11-70 INJECTOR
RESISTOR

Testing, page 11-94

FRONT HEATED
OXYGEN (O2) SENSOR

Troubleshooting, page 11-32

INTAKE AIR TEMPERATURE
(TA) SENSOR

Troubleshooting, page 11-52

REAR KNOCK SENSOR

Troubleshooting, page 11 -62

REAR HEATED
OXYGEN (O2) SENSOR

Troubleshooting, page 11 -32

MAIN RELAY
Relay Testing, page 11-104

Inspection, page 11-105

ELECTRONIC CONTROL UNIT (ECU)

Troubleshooting, page 11-26
FUEL PUMP RELAY

Inspection, page 11-99ProCarManuals.com