1997 ACURA NSX ignition

Function Test

NOTE: Before testing, remove the left door panel, then

disconnect all connectors from the door panel.

10P CONNECTOR

DOOR PANEL

NOTE: Check the No. 4 (15A) fuse in the under-dash

fuse box before testing.

One or both inoperative:

1. Check for voltage between the YEL/BLK1 terminal

and body ground with the ignition switch ON (II).

There should be battery voltage.

If there is no voltage, check for an open in the

YEL/BLK1 wire.

If there is battery voltage, go to step 2.
2. Check for continuity between the BLK terminal and

body ground.

There should be continuity. If there is no continui-

ty, check for:

An open in the BLK wire.

Poor ground (G401, G402, G403).

Left inoperative:

Connect the YEL/BLK1 terminal to the YEL/RED terminal

and the YEL/WHT (or YEL/BLK2) terminal to body

ground with jumper wires.

The left mirror should tilt down (or swing left) when the

ignition switch is turned ON (II).

If the
mirror does
not
tilt
down
(or
does
not
swing

left), check for an open in the YEL/WHT (or

YEL/BLK2) wire between the left door mirror and the

switch.

If the wire is OK, check the mirror.

If the mirror doesn't move in either direction, repair

the YEL/RED wire.

If the mirror operates properly, check the mirror

switch.

Right inoperative:

Connect the YEL/BLK1 terminal to the BLU/GRN ter-

minal and the YEL/WHT (or BLU/BLK) terminal to the

body ground with jumper wires.

The
right
mirror should
tilt
down
(or
swing left) when

the ignition switch is turned ON (II).

If the
mirror does
not
tilt
down
(or
does
not
swing

left), remove the right door panel, and check for an

open in the YEL/WHT or BLU/BLK) wire between the

right door mirror and the switch.

If the wire is OK, check the right door mirror.

If the mirror doesn't move in either direction, repair

the BLU/GRN wire.

If the mirror operates properly, check the mirror

switch.ProCarManuals.com

Wire
Test condition
Test: Desired result
Possible cause if result is not obtained

BLK
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

ORN
Under all conditions

Check for voltage to ground:

There should be battery voltage.
• Blown No. 35 (20 A) fuse

• An open in the wire

GRN/WHT2
Driver's door lock

switch in LOCK
Check for voltage to ground:

There should be 1 V or less.

WHT/YEL
Driver's door lock

switch in UNLOCK
• Faulty driver's door lock switch

• Poor ground (G401, G402, G403)

• An open in the wire

BLK/WHT
Passenger's door lock

switch in LOCK
Check for voltage to ground:

There should be 1 V or less.

BLK/RED
Passenger's door lock

switch in UNLOCK
• Faulty passenger's door lock switch

• Poor ground (G401, G402, G403)

• An open in the wire

BLU/WHT
Driver's door lock knob

in LOCK
Check for voltage to ground:

There should be 1 V or less.

BLU/RED1
Driver's door lock knob

in UNLOCK
• Faulty driver's door lock actuator

• Poor ground (G401, G402, G403)

• An open in the wire

GRY/WHT
Passenger's door lock

key cylinder switch in

LOCK
Check for voltage to ground:

There should be 1 V or less.

GRN/YEL2
Passenger's door lock

key cylinder switch in

UNLOCK
• Faulty passenger's door lock

actuator

• Poor ground (G401, G402, G403)

• An open in the wire

GRN/BLU
Driver's door open

GRN/RED
Passenger's door open
Check for voltage to ground:

There should be 1 V or less.
• Faulty door switch

• Poor ground (G401, G402, G403)

• An open in the wire

BLU/GRN
Ignition key is inserted

into the ignition switch.
Check for voltage to ground:

There should be 1 V or less.
• Faulty ignition key switch

• Poor ground (G401, G402, G403)

• An open in the wire

WHT/RED

and

YEL/RED
Connect the ORN termi-

nal to the WHT/RED ter-

minal, and the YEL/RED

terminal to the BLK ter-

minal momentarily.
Check door lock operation:

Both doors should lock as power

and ground are connected momen-

tarily.
• Faulty actuator

• An open in the wire

Connect the ORN termi-

nal to the YEL/RED ter-

minal, and the

WHT/RED terminal to

the BLK terminal

momentarily.
Check door lock operation:

Both doors should unlock as power

and ground are connected momen-

tarily.

CAUTION: To prevent damage to the motor, connect power and ground only momentarily.ProCarManuals.com

Power Windows

Control Unit Input Test

NOTE: The control unit only controls the driver's door

window.

Remove the driver's door panel and disconnect the 4P

and 6P connectors 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.
POWER WINDOW

MASTER SWITCH
POWER WINDOW

CONTROL UNIT

Wire
Test condition

Test: Desired result
Possible cause if result is not obtained

BLK1
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

Ignition switch ON (II)

Check for voltage to ground:

There should be battery voltage.

WHT/YEL
• Blown No. 50 (20 A) fuse

• Faulty power window relay

• Faulty key-off timer system

• Poor ground (G201)

• An open in the wire

BLK/YEL
Ignition switch ON (II)

and driver's switch UP

BLK/GRN
Ignition switch ON (II) and

driver's switch DOWN
Check for voltage to ground:

There should be battery voltage as

the switch is pushed.
• Faulty driver's switch

• An open in the wire

RED/GRN
Ignition switch ON (

and driver's switch

DOWN (AUTO)

BLU and

BLK2
Connect the WHT/YEL

terminal to the RED/BLU

terminal, and the BLK1

terminal to the RED/YEL

terminal.
Check for voltage between the BLU (+)

and BLK2 (-) terminals with an analog

voltmeter: It should indicate between

3-8 volts as the motor runs.
• Faulty pulser

• Faulty driver's motor

• An open in the wireProCarManuals.com

Rear Window Defogger

Function Test

CAUTION: Be careful not to scratch or damage the

defogger wires with the tester probe.

Check for voltage between the positive terminal

and body ground with the ignition switch and the

defogger switch ON. There should be battery

voltage.

If there is no voltage, check for:

— Faulty defogger relay.

— An open in the BLK/GRN wire.

If there is battery voltage, go to step 2.

POSITIVE TERMINAL

NEGATIVE TERMINAL

2. Disconnect the positive terminal, check for con-

tinuity between the negative terminal and body

ground. If there is no continuity, check for an open

in the defogger ground wire.

3. Reconnect the positive terminal, touch the

voltmeter positive lead to the middle of each defog-

ger wire, and the negative lead to the negative ter-

minal. There should be approximately 6 V with the

ignition switch and the defogger switch ON.

If the voltage is as specified, the defogger wire

is OK.

If there is battery voltage, the defogger wire is

broken on the negative side.

If there is no voltage, the defogger wire is

broken on the positive side.
Defogger Wires Repair

To make an effective repair, the broken section must be

no longer than one inch.

1. Lightly scrub the area around the break with fine

steel wool, then clean it with alcohol.

2. Carefully mask above and below the broken section

with cellophane tape.

OPEN

CELLOPHANE

DEFOGGER WIRE

3. Using a small brush, apply a heavy coat of silver

conductive paint extending about 1/8" on both

sides of the break. Thoroughly mix the paint before

use. Let it dry for thirty minutes.

PAINT

4. Check for proper operation with a voltmeter (it

should read half of battery voltage at the mid-

point).

5. Apply a second coat of paint in the same way. Let it

dry for three hours before removing the tape.ProCarManuals.com

Cruise Contro l
Control Uni t Inpu t Tes t (cont'd )
WireTes t conditio n Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
BLKUnde r al l condition sCheck fo r continuit y t o ground :
Ther e shoul d b e continuity . •
Poo r groun d (G101 )
• A n ope n i n th e wir e
YEL/BL KIgnition switc h O N (II )Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage . •
Blow n No . 1 8 (2 0 A ) fus e
• A n ope n i n th e wir e
LTGR N
Ignition switc h O N (II )
an d contro l switc h O N Chec
k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage . •
Blow n No . 5 (1 5 A ) fus e
• Fault y contro l switc h
• A n ope n i n th e wir e
LT GRN /
BLKRESUM E butto n pushe d
LT GRN /
RED
SET butto n pushe d
Groun d eac h terminal :
Horn s shoul d soun d a s th e switc h i s
pushed . •
Blow n No . 4 5 (2 0 A ) fus e
• Fault y SET/RESUM E switc h
• Fault y cabl e ree l
• A n ope n i n th e wir e
BLU/OR N
M/T: Clutc h peda l
release d
A/T: Shif t leve r i n
o r
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity . •
Fault y o r misadjuste d clutc h switc h
(M/T)
• Fault y A/ T gea r positio n switc h (A/T )
• Poo r groun d (G401 , G402 , G403 )
• A n ope n i n th e wir e
ORN
Ignitio n switc h O N (II )
an d mai n switc h ON ;
raise th e rea r o f th e car ,
and rotat e on e whee l
slowly . Chec
k fo r voltag e betwee n th e
YEL/RE D an d BL K terminals :
Ther e shoul d b e 0 - 5 V or mor e -
0 - 5 V or mor e repeatedly . •
Fault y vehicl e spee d senso r (VSS )
• A n ope n i n th e wir e
GRY
Ignitio n switc h O N (II) ,
mai n switc h ON ; brak e
peda l pushed , the n
release d
Check fo r voltag e t o ground :
Ther e shoul d b e 0 V wit h th e peda l
pushe d an d batter y voltag e wit h th e
peda l released . •
Fault y brak e switc h
• A n ope n i n th e wir e
GRN/WH T
Brake peda l pushed ,
the n release d Chec
k fo r voltag e t o ground :
Ther e shoul d b e batter y voltag e wit h
th e peda l pushed , an d 0 V wit h th e
peda l released . •
Fault y brak e switc h
• A n ope n i n th e wir e
Ignitio n switc h O N (II )
BLU/BL K
Attach t o ground : Th e indicato r ligh t
i n th e gaug e assembl y shoul d com e
on.
• Blow n bul b
• Blow n No . 5 (1 5 A ) fus e
• Fault y dimmin g circui t i n th e gaug e
assembl y
• A n ope n i n th e wir e
ProCarManuals.com

Security Alar m Syste m
Wiring Connection s
"1: NSX- T (ope n top )
TRUN K KE Y
CYLINDE R SWITC H
REARWIREHARNES S
RIGH T
TAILLIGH T
ENGINECOMPARTMEN T LI D
SWITC H
DRIVER'S
DOO R KE Y
CYLINDE RSWITCH
' SECURIT Y
INDICATO R
DRIVER' S DOO R LOC K
ACTUATO R ASSEMBL Y
PASSENGER' S
DOO R KE Y
CYLINDE RSWITCH
PASSENGER' S
DOO R
LOCKACTUATO R
ASSEMBL Y
IGNITION KEYSWITC H
IGNITIO NSWITCH
UNDER-HOO D RELA Y BO X A
(HOR N RELAY )
FLOOR WIR E HARNES S
DRIVER' S DOO R
WIR E HARNES S
RIGHT REA RSIDE MARKE R
LIGH T TRUN
K LATC H
SWITC H
RETRACTABL EHEADLIGHTCONTROLUNIT
LEF TTAIL -
LIGH T
HEADLIGHT
RETRACTO RRELAYS
BATTER Y
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
SECURIT Y CONTRO L
UNIT
FRON T COMPARTMEN T
WIR E HARNES S
UNDER-HOO D FUSE/RELA Y BO X
(HEADLIGHT/TAILLIGHT /DIMMER RELAY ) LEF
T FRON T
PARKIN G
LIGH T
LEF T (LOW ) HOR N
HOO DSWITC H
FRONT COMPARTMEN TWIRE HARNES S
RIGH T FRON T SID E MARKE R
LIGH T
RIGHT HEADLIGH TRIGH
T (HIGH ) HOR N
RIGH T PARKIN G
LIGH T
LEFT REA RSIDE MARKE R LIGH TSWITCH*1
LEFTROO FLOCK
ProCarManuals.com

WireTes t conditio n Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
LT GRN /
WHT
BLU/RE D
RED/YE L
LTGRN/
RED
YEL/GRN2
BLU/GR N
BLU
BLK/BR N
or BLK /
LT GR N
BRN/WH T
WHT
Unde r al l condition s
Unde r al l condition s
Unde r al l condition s
Passin g switc h O N
Hoo d ope n
Hoo d close d
Ignitio n ke y i s i n th e
ignitio n switch .
Ignition ke y is no t i n
th e ignitio n switch .
Engin e compartmen t
li d ope n
Engin e compartmen t
li d close d
Unde r al l condition s
Trun k ke y in UNLOC K
Trun k li d ope n
Trun k li d close d Attac
h t o ground : Al l horn s shoul d
sound .
Attac h t o ground :
Th e headlight s shoul d com e on .
Connec t t o ground :
Th e taillight s shoul d com e on .
Chec k fo r voltag e to ground :
Ther e shoul d b e batter y
voltage .
Check fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e n o continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e n o continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e n o continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e n o continuity .•
Blow n No . 4 5 (2 0 A ) fus e
• Fault y hor n rela y
• Fault y hor n (either )
• Poo r groun d (G30 1 o r G302 )
• A n ope n i n th e wir e
• Fault y headligh t rela y
• Fault y headligh t syste m
• A n ope n in th e wir e
• Fault y tailligh t rela y
• Fault y tailligh t syste m
• A n ope n in th e wir e
• Fault y passin g switc h
• Fault y dimme r rela y
• Fault y headligh t rela y
• A n ope n i n th e wir e
• Fault y hoo d switc h
• Misadjuste d hoo d switc h
• Poo r groun d (G301 )
• A n ope n i n th e wir e
• Fault y ignitio n ke y switc h
• Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
• Fault y engin e compartmen t li d
switc h
• Misadjuste d engin e compartmen t
li d switc h
• Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
• Poo r groun d (G404 )
• A n ope n in th e wir e
• Fault y trun k ke y
• Poo r groun d (G551 )
• A n ope n i n th e wir e
* Fault y trun k latc h switc h
• Misadjuste d trun k latc h switc h
• Poo r groun d (G551 )
• A n ope n in th e wir e
(cont'd )
23-323ProCarManuals.com

Security Alar m Syste m
Ignition Ke y Switc h Tes t
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
1. Remov e th e dashboar d lowe r cover , an d disconnec t
th e connectors .
DASHBOAR DLOWERCOVER
2. Disconnec t th e 8 P connecto r fro m th e floo r wir e
harness .
3. Chec k continuit y a t th e switc h connecto r terminals .
Ther e shoul d b e continuit y betwee n th e No . 8
an d No . 7 terminal s wit h th e ignitio n ke y inserte d
into th e ignitio n ke y cylinder .
There shoul d b e n o continuit y betwee n terminal s
No. 8 an d No . 7 wit h th e ignitio n ke y removed .
View fro m wir e sid e
23-32 8
8P CONNECTO R
ProCarManuals.com