1991 ACURA NSX light

Rear Window Defogger
Switch Light Bulb Replacement
1. Remove the steering column lower and upper covers.
2. Remove the four screws from the combination
switch.

3. Remove the rear window defogger switch (see previous page).
4. Remove the rear window defogger switch bulbs.

BULBS (0.91 W)
REAR WINDOW
DEFOGGER SWITCH Relay Test
1. Remove the defogger relay in the engine compart- ment fuse/relay box.
2. There should be continuity between the C and D terminals.
3. There should be continuity between the A and B terminals when power and ground are connected to

the C and D terminals.

There should be no continuity when power isdisconnected.ProCarManuals.com

Cruise Control

Component Location Index

CAUTION:
All SRS wiring harnesses are covered with yellow

outer Insulation.
Before disconnecting any part of the SRS wire

hamess Install the short connectors (see page

24-10).
Replace the entire affected SRS harness assembly if

it has an open circuit or damaged wiring.

BRAKE SWITCH

Test, page 23-308 MAIN SWITCH
Test, page 23-299 Replacement, page 23-298
INDICATOR LIGHT and
DIMMING CIRCUIT
(In the gauge assembly)
Bulb Locations, page 23-128

CLUTCH SWITCH (M/T)
Teat, page 23-308

CABLE REEL

Test, page 23-250

Replacement
,
page 23-344

A/T GEAR POSITION
SWITCH

Test, 23-309

Replacement, page 23-161

CRUISE CONTROL UNIT

Inpu
t
Test, page 23-296

SRS
MAIN

HARNESS

SET/RESUME SWITCH

Test
,
page 23-307Replacement
,
page 23-307
ProCarManuals.com

Cruise Control

Description

The cruise control system uses mechanically and elec-

trically operated devices to maintain vehicle speed at a

setting selected by the driver.

The cruise control unit receives command signals from

the cruise control main switch and the cruise control

set/resume switch. It receives information about

operating conditions from the brake switch, ECM, vehi-

cle speed sensor (VSS), the clutch switch (with manual

transmission), or the A/T gear position switch (with

automatic transmission). The cruise control unit sends

operational signals to the devices that regulate the

throttle position. The throttle position maintains the

selected vehicle speed. Essentially, the control unit

compares the actual speed of the vehicle to the

selected speed. Then, the control unit uses the result of

that comparison to open or close the throttle.

The brake switch releases the system's control of the

throttle at the instant the driver depresses the brake

pedal. The switch sends an electronic signal to the con-

trol unit when the brake pedal is depressed; the control

unit responds by allowing the throttle to close. The

clutch switch (manual transmission) or the A/T gear

position switch (automatic transmission) sends a

disengage signal to the control unit that also allows the

throttle to close.
Operation:

The cruise control system will set and automatically

maintain any speed above 30 mph (45 kph). To set,

make sure that the main switch is in the "ON" position.

After reaching the desired speed, press the set switch.

The cruise control unit will receive a set signal and, in

turn, will actuate the cruise control actuator. When the

set switch is depressed and the cruise control system is

on, the "cruise control" ON indicator in the gauge

assembly will light up. You can cancel the cruise control

system by pushing the main switch to "OFF". This

removes power to the control unit and erases the set

speed from memory. If the system is disengaged tem-

porarily by the brake switch, clutch switch, or A/T gear

position switch and vehicle speed is still above 30 mph,

press the resume switch. With the resume switch

depressed and the set memory retained, the vehicle

automatically returns to the previous set speed.

For gradual acceleration without depressing the ac-

celerator pedal, push the resume switch down and hold

it there until the desired speed is reached. This will send

an acceleration signal to the control unit. When the

switch is released, the system will be reprogrammed for

the new speed. To slow down, depress the set switch.

This will send a deceleration signal to the control unit

causing the car to coast until the desired speed is reach-

ed. When the desired speed is reached, release the set

switch. This will reprogram the system for the new

speed.ProCarManuals.com

5. Remove the four screws and remove the combina-

tion light switch (main switch).

COMBINATION LIGHT SWITCH
10-P CONNECTOR

16-P CONNECTOR
Main Switch Test
1. Remove the dashboard lower panel and knee bolster pad.
2. If necessary, remove the knee bolster.
3. Disconnect the 16-P connector and check for con- tinuity between the terminals in each switch posi-
tion according to the table.

CRUISE

MAIN

SWITCH

16-P CONNECTOR

View from terminal sideProCarManuals.com

5. Remove the four screws and remove the combina-

tion light switch (main switch).

COMBINATION LIGHT SWITCH

10-P CONNECTOR

16-P CONNECTOR
Main Switch Test

1. Remove the dashboard lower panel and knee

bolster pad.

2. If necessary, remove the knee bolster.

3. Disconnect the 16-P connector and check for con-

tinuity between the terminals in each switch posi-

tion according to the table.

CRUISE

MAIN

SWITCH

16-P CONNECTOR

View from terminal sideProCarManuals.com

Label Locations

SRS CAUTION LABELS: Refer to page 1-6.
BATTERY CAUTION ALB CAUTION

ALB and BRAKE
FLUID CAUTION
COOLING FAN

CAUTION

RADIATOR BLEED

PLUG CAUTION
AIR CONDITIONER
CAUTION
RETRACTABLE

HEADLIGHT CAUTION
FAN CAUTION

EXPANSION

TANK CAP

CAUTION

COOLANT
CAUTION PRECAUTION
EMISSION CONTROL
INFORMATION and
VACUUM HOSE
ROUTING DIAGRAM

SPARK PLUG

CAUTION
TIRE INFORMATIONProCarManuals.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

Troubleshooting

Troubleshooting Guide
NOTE: Across each row in the chart, the systems that could be sources of a symptom are ranked in the order they should be inspected starting with . Find the symptom in the left column, read across to the most likely source, then
refer to the page listed at the top of that column. If inspection shows the system is OK, try the next most likely system

,
etc.
* If codes other than those listed above are indicated, count the number of blinks again. If the indicator is in fact blinking these codes, substitute a known-good ECU and recheck. If the indication goes away, replace the original ECU. : If the Check Engine light is on while the engine is running, jump the service check connector. If no code is
displayed (Check Engine light stays on steady), the back-up system is in operation.
Substitute a known-good ECU and recheck. If the indication goes away, replace the original ECU.

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