ACURA NSX 1991 Service Repair Manual

Integrated Control Unit

Input Test

Side Marker Light Flasher System:

No. Terminal
Test condition

Test: Desired result
View from wire side

Possible cause if result is not obtained

Power Window Key-off Timer System:

No. Terminal
Test condition

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

Combined Operation Wiper/Washer System:

No. Terminal
Test condition

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

Lights-on Reminder Systen.
Chime Test
NOTE: Refer to page 23-158 ('93-'96) ('91-'92) for a dia-
gram of the lights-o

n
reminder circuit, and page 23-166

for the input test of the circuit.
When the ignition key is turned off and removed with
the lights on, voltage is applied to the reminder circuit in
the integrated control unit. When you open the driver's
door, the circuit senses ground through the closed door
switch. With voltage at the "A6" terminal, ground at the "GRN/BLU 2
" terminal, and no voltage at the "A5" termi-
nal, the chime sounds to remind the driver to turn off

the lights.

1. Remove the dashboard lower cover, and disconnect the connectors.

DASHBOARD

LOWER

COVER

CONNECTORS
CHIME

View from wire side

2. Test the chime by connecting battery power to the "B" terminal, and ground to the "A" terminal, and
cycling the power on-off repeatedly.
3. If the chime fails to sound every time power is cycled, replace it.ProCarManuals.com

Key-in Reminde r Syste m
Ignitio n Ke y Switc h Tes t
NOTE : Refe r t o pag e 23-165 for the input test of key-in
reminde r, beeper circuit.
Whe n th e ignitio n ke y i s no t removed , th e key-i n
reminde r i n th e integrate d contro l uni t sense s groun d
throug h th e close d ignitio n ke y switch . Whe n yo u ope n
th e driver' s door , th e reminde r circui t sense s groun d
throug h th e close d doo r switch . Wit h groun d a t th e
"BLU/GRN " an d "GRN/BLU
2" terminals , th e beepe r
sounds .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e floo r wir e harnes s connectors .
DASHBOAR DLOWERCOVER
3. Disconnec t th e 8- P connecto r fro m th e floo r wir e
harness .
4. Ther e shoul d b e continuit y betwee n th e No . 8 an d
No . 7 terminal s whe n th e ignitio n ke y i s inserted .
Ther e shoul d b e n o continuit y wit h th e ignitio n ke y
removed .
View fro m wir e sid e
ProCarManuals.com

Lighting System
Component Location Index

RETRACTABLE HEADLIGHT
CONTRO
L
UNIT

Input Test, page 23-178 ('94-'96) ('91-'93)

HIG
H
BEAM INDICATOR LIGHT


(In the gauge assembly)

Gaug
e
Assembly, page 23-121


COMBINATION
LIGHT SWITCH
Test, page 23-181 Replacement, page 23-162
DAYTIME RUNNING LIGHTS
CONTROL UNIT (Canada)
Test, page 23-180
SECURITY CONTROL UNIT
Input Test, page 23-312 ('94-'96) ('91-'93)ProCarManuals.com

UNDER-HOOD FUSE/RELAY BOX
UNDER-HOOD RELAY BOX A
DIMMER RELAY
Test, page 23-189
TAILLIGHT RELAYTest, page 23-190
('94-'96) ('91-'93) LEFT HEADLIGHT

RETRACTOR CUT RELAY

Test page 23-190 ('94-'96) ('91-'93)
RIGHT HEADLIGHTRETRACTOR CUT RELAYTest, page 23-190 ('94-'96) ('91-'93)
HEADLIGHT RELAY
Test, page 23-189
RIGHT HEADLIGHT

RETRACTOR RELAY

Test page 23-190
('94-'96) ('91-'93)
RIGHT HEADLIGHT
RETRACTOR MOTOR
Test, page 23-188
Replacement, page

23-186

RIGHT DAYTIME RUNNING
LIGHT (Canada)
Replacement, page, 23-194 HEADLIGHTS

Adjustment, page 23-192

Replacement page 23-163

LEFT DAYTIME RUNNING LIGHT (Canada)
Replacement, page 23-194
LEFT HEADLIGHT
RETRACTOR MOTOR
Test, page 23-186 Replacement, page 23-186 LEFT HEADLIGHT

RETRACTOR RELAY

Test, page 23-190
('94-'96) ('91-'93)ProCarManuals.com

Switches

The lighting system is controlled by five switches and the turn signal cancel unit.

HEADLIGHT SWITCH TURN SIGNAL CANCEL UNIT
HAZARD WARNING SWITCH

TURN SIGNAL and DIMMER SWITCH

TURN SIGNAL CANCEL SWITCHProCarManuals.com

Lighting Syste m
Retractabl e Headligh t Contro l Uni t Inpu t Tes t
Remov e th e rea r bulkhea d panels , an d disconnec t th e
18- P connecto r fro m th e contro l unit .
Inspec t th e connecto r an d socke t terminal s t o b e sur e
the y ar e al l makin g goo d contact .
• I f th e terminal s ar e bent , loose , o r corroded , repai r
them as necessary , an d rechec k th e system .
• I f th e terminal s loo k OK , mak e th e followin g inpu t
test s a t th e connector .
— If an y tes t indicate s a problem , fin d an d correc t
th e cause , the n rechec k th e system .
— If al l th e inpu t test s prov e OK , th e contro l uni t
mus t b e faulty ; replac e it .
NOTE : Differen t wire s wit h th e sam e colo r hav e
bee n give n a numbe r suffi x t o distinguish them
(for example , RED/YEL1 an d RED/YEL4 ar e no t th e
same) .
REAR BULKHEA D
RETRACTABL E HEADLIGH T
CONTRO L UNI T
No. Wir e Test conditio n Test: Desire d resul t Possibl e caus e if resul t i s no t obtaine d
ProCarManuals.com

No. Wire Test condition Test: Desired result Possible cause if result is not obtainedProCarManuals.com

Lighting System

Daytime Running Lights Control Unit Input Test (Canada)

Remove the glove box lower panel and glove box.

Disconnect the 4-P and 8-P connectors from the daytime

running lights 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.
DAYTIME RUNNING LIGHTS

CONTROL UNIT (Canada)

4-P CONNECTOR

View from wire side

No. Wire
Test condition
Test: Desired result

Possible cause if result is not obtained
8-P CONNECTORProCarManuals.com