1991 ACURA NSX Service Repair Manual

Security Alarm System
Component Location Index

SRS components are located in this area. Review the

SRS component locations, precautions, and procedures
i
n
the SRS section (24) before performing repairs or ser-

vice.

RIGHT REAR SIDE
MARKER LIGHT
Replacement, page 23-197 PASSENGER'S DOOR KEY
CYLINDER SWITCH
Test, page 23-267
Replacement, section 20
STEREO RADIO/

CASSETTE PLAYER

Terminals, page

23-240
IGNITION

SWITCH
Test, page 23-72
('93-'96) ('91-'92)
IGNITION

KEY SWITCH
Test, page 23-326 ('93-'96) ('91-'92)
UNDER-HOOD

RELAY BOX A
HORN RELAY
Test, page 23-249

BATTERY

Teat, page 23-68 ('93-'96) ('91-'92)
SECURITY HORN
Test, page 23-218 LEFT HEADLIGHT
Replacement page 23-193
LEFT FRONT
PARKING LIGHT
Replacement,
page 23-195
LEFT (LOW) HORN
Test, page 23-248
HOOD SWITCH
Test, page 23-325 ('93-'96) ('91-'92)
RIGHT (HIGH) HORN
Test, page 23-248
RIGHT FRONT

PARKING LIGHT

Replacement,

page 23-195
RIGHT HEADLIGHT
Replacement,
page 23-193
RIGHT FRONT
SIDE MARKER LIGHT
Replacement,
page 23-195 HEADLIGHT

RETRACTOR RELAYS

Test, page 23-190
('93-'96) ('91-'92)
HEADLIGHT RELAY
Test, page 23-189 TAILIGHT RELAY

Test, page 23-190
('93-'96)('91-'92)
UNDER-HOOD

FUSE/RELAY

BOX
DIMMER RELAY
Test, page 23-189
SECURITY

CONTROL UNIT
Input Test,

page 23-320 ('94-'96) ('93) ('91-'92)

PASSENGER'S DOOR

LOCK ACTUATOR

ASSEMBLY
Test, page 23-323
('94-'96) ('93) ('91-'92)ProCarManuals.com

LEFT FRONT
SIDE MARKER LIGHT Replacement, page 23-195 ROOF LOCK

SWITCH*
1

Test, page 23-154 ('94-'96) ('91-'93)
STARTER CUT
RELAY

Test, page 23-80
RETRACTABLE

HEADLIGHT

CONTROL UNIT
Input Test,

page 23-178 ('94-'96) ('91-'93)
ENGINE COMPARTMENT LID SWITCHTest, page 23-325 ('93-'96) ('91-'92)
TRUNK LATCH SWITCHTest, page 23-323 ('94-'96) ('93) ('91-'92)
TRUNK KEY CYLINDER
SWITCH
Test, page 23-324 ('93-'96) ('91-'92)

TAILLIGHTS

Replacement, page 23-196

LEFT REAR SIDE

MARKER LIGHT
Replacement, page 23-197
DRIVER'S DOOR LOCK
ACTUATOR ASSEMBLY
Test, page 23-323 ('94-'96) ('93) ('91-'92)
Replacement, section 20 A/T GEAR POSITION
SWITCH
(A/T)
Test, page 23-160
('93-'96) ('91-'92)
DRIVER'S DOOR KEY CYLINDER

SWFTCH

Test, page 23-266
Replacement, section 20
SECURITY INDICATOR
Replacement, page 23-324
('93-'96) ('91-'92)
CLUTCH INTERLOCK

SWITCH (M/T)

Test, page 23-80 *1:NSX-T (open top)ProCarManuals.com

Security Alar m Syste m
Descriptio n
This syste m is activate d automaticall y 1 5 second s afte r everythin g ha s bee n close d an d locked . Th e securit y alar m syste m
indicato r ligh t locate d o n th e driver' s doo r pane l wil l flas h afte r th e door s ar e properl y locked .
I f an y o f th e followin g condition s occur , th e horn s wil l sound , th e headlight s wil l po p u p an d flash , an d th e sid e marke r
lights , parkin g light s an d taillight s wil l flas h fo r abou t tw o minutes , o r unti l th e syste m is disarme d b y unlockin g eithe r
doo r fro m th e outsid e wit h th e key .
Doo r i s opene d forcibly .
Engin e compartmen t li d i s opened .
Trun k li d i s opene d withou t usin g th e key .
Hoo d is opened .
Roof i s unlatche d (NSX- T "ope n top") .
Flowchar t o f th e securit y alar m syste m operation : Batter
y terminal(s ) i s (are ) remove d an d reconnected .
Engin e starte r circui t an d batter y circui t ar e bypasse d
b y breakin g th e ignitio n switch .
Hood/engin e compartmen t lid/trun k li d opene r o r roo f
releas e leve r (NSX- T "ope n top" ) i n th e vehicl e i s
operated .
Remove th e ke y fro m th e ignitio n switc h
• Ignitio n ke y switc h OF F
Clos e al l th e doors , hood , engin e com -
partmen t lid , an d trun k lid . Th e roo f ca n
b e unlatche d o r latched .
NOTE : Bot h roo f loc k switche s hav e t o
b e in th e sam e position .
• Bot h doo r switche s OF F
• Engin e compartmen t li d switc h OF F
• Hoo d switc h OF F
• Trun k li d switc h OF F
• Bot h roo f loc k switche s OF F o r O N
(NSX- T "ope n top" )
Loc k th e driver' s o r passenger' s doo r fro m th e out -
sid e b y usin g th e key .
• Doo r loc k kno b switche s OF F
• Doo r ke y cylinde r switc h OF F
(PREARMED )
15 se c passed ?
The securit y alar m syste m is armed .
t o pag e 23-31 3 Th
e securit y alar m syste m is disarmed .
Doo r switc h (Driver/Passenger ) O N
Doo r loc k kno b switc h O N
Trun k li d switc h O N
Ignitio n ke y switc h O N
Onl y on e o r bot h roo f loc k switche s O N
(NSX- T "ope n top" ) Fro
m pag e ( 23-313 )
Indicato
r start s flashing .
1 se c O N / 1 se c OF F
ProCarManuals.com

From pag e 23-31 2
Indicato r flashes .
0.2 se c O N / 2. 4 se c OF F
Wan t th e syste m disarmed ?
(ARMED)
Trunk opene d b y key ?
Trun k li d switc h O N
Trun k ke y cylinde r switc h
Illegal activit y
1. Doo r i s opene d forcibly . o r
2 . Engin e compartmen t li d i s opened . o r
3. Trun k li d is opene d withou t usin g th e key . o r4. Hoo d is opened . o r
5 . Batter y terminal(s ) is(are ) disconnecte d
an d reconnected . o r
6. Engin e starte r circui t an d batter y circui t ar ebypasse d b y breakin g th e ignitio n switch . o r7. Hood/engin e compartmen t lid/trun k li d opene r o r roo f
releas e leve r (NSX- T "ope n top" ) i s operated . o r
8 . Stere o radio/cassett e playe r i s disconnected .
Alar m
The horn s soun d an d headlights , sid e marke r light s an dtaillight s flas h repeatedl y fo r tw o minutes .Engine starte r circui t interrupted .
About tw o minute s passed ?Want th e syste m disarmed ?
Either doo r i s unlocke d b y usin g th e key .
• Eithe r doo r ke y cylinde r switc h
Th e securit y alar m syste m is disarmed .
Indicato r stop s flashing . (T
o pag e
23-312 )
Rear m th e securit y alar m system ?
ProCarManuals.com

Security Alar m Syste m
Wiring Connection s
TRUNK KE YCYLINDE R SWITC H
REARWIREHARNES S
RIGHT
TAILLIGH T
PASSENGER' S
DOO R KE Y
CYLINDE RSWITCH
PASSENGER' SDOORLOCKACTUATO R
ASSEMBL Y
DRIVER'SDOOR KE YCYLINDE RSWITCH
LEFTROO FLOCKSWITC H
NSX-T (ope n top )
DRIVER' S DOO R LOC K
ACTUATO R ASSEMBL Y
UNDER-HOO D RELA Y BO X A
(HOR N RELAY )
FLOO R WIR E HARNES S
DRIVER' S DOO R
WIR E HARNES S
RIGH T REA R
SID E MARKE R
LIGH T
CLUTC H INTERLOC KSWITCH
SECURIT Y HOR N
LEF T HEADLIGH T
LEF T FRON T SID E
MARKE R LIGH T
RIGH T ROO F LOC K
SWITCH*1
PASSENGER' S
DOO R WIR E
HARNES S
A/ T GEA R POSITIO N
SWITC H (A/T )
SECURIT Y CONTRO L
UNIT
FRON T COMPARTMEN T
WIR E HARNES S
UNDER-HOO D FUSE/RELA Y BO X
(HEADLIGHT/TAILLIGHT /
DIMME R RELAY )
RIGH T FRON T SID E MARKE R
LIGH T LEF
T FRON T
PARKIN GLIGHT
LEF T (LOW ) HOR N
FRON T COMPARTMEN T
WIR E HARNES S
RIGH T (HIGH ) HOR N
RIGH T HEADLIGH T
LEFTTAIL -
LIGH T
RETRACTABL EHEADLIGHTCONTROLUNITIGNITIO NSWITCH
IGNITIO N KE YSWITC HLEFT REA RSIDE MARKE R LIGH T
BATTERY
TRUNK LATCH
SWITCH
ENGIN
E
COMPARTMEN T LI D
SWITC H
SECURIT YINDICATO R
HEADLIGH T
RETRACTO RRELAYS
RIGHT PARKIN G
LIGH T
HOODSWITC H
ProCarManuals.com

Troubleshooting

NOTE: The numbers in the table show the troubleshooting sequence.

NSX-T (open top)ProCarManuals.com

Security Alarm System

Control Unit Input Test

Remove the glove box, and disconnect the 22-P connec-

tor and 16-P connector from the control unit.

Inspect the connector and socket terminals to be sure

they are all making good contact.

• If the terminals are bent, loose, or corroded, repair

them as necessary, and recheck the system.

• If the terminals look OK, make the following input

tests at the connector.

— If any test indicates a problem, find and correct the

cause, then recheck the system.

— If all the input tests prove OK, the control unit

must be faulty; replace it.

• Different wires with the same color have been given a

number suffix to distinguish them (for example,

YEL/GRN1 and YEL/GRN2 are not the same).
SECURITY

CONTROL UNIT

View from

wire side

Not used

No. Wire
Test condition

Test: Desired result
Possible cause if result is not obtained
22-P

CONNECTOR

16-P CONNECTORProCarManuals.com

No. Wire
Test condition

Test: Desired result
Possible cause if result is not obtainedProCarManuals.com