1991 ACURA NSX Service Repair Manual

Integrated Contro l Uni t
Inpu t 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
in th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
Remov e th e lef t kic k pane l cover , an d th e rela y holde r
fro m it s bracket , the n disconnec t th e 16- P connecto r
fro m th e integrate d contro l unit . Remov e th e integrate d
contro l uni t fro m th e under-das h fus e box .
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
the m as necessary, and rechec k th e system .
• I f th e terminal s look 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 with the sam e colo r hav e
bee n give n a numbe r suffi x t o distinguis h the m (fo r
example , YEL1 an d YEL2 ar e no t th e same) .INTEGRATE DCONTROL UNI T16-P CONNECTO R
UNDER-DASH FUS E BO X
Thes e terminal s ar enot used .
View fro m wir e sid e
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View from wire side

Entry Light Timer System:

No. Terminal Test condition
Test: Desired result
Possible cause if result is not obtained

Key-in Reminder System:

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

Integrated Control Unit

Input Test

View from wire side

Lights-on Reminder System:

No. Terminal Test condition

Test: Desired result
Possible cause if result is not obtained

Seat Belt Reminder System:

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

Rear Window Defogger Timer System:

No. Terminal Test condition
Test: Desired result
Possible cause if result is not obtained

Oil Pressure Indicator System:

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

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
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