dashboard ACURA NSX 1991 Service User Guide

Sunlight Sensor

Removal

With a small screwdriver, carefully pry the sunlight sen-

sor out of the dashboard and disconnect its connector.

Protect the dashboard; cover it with a shop towel before

you pry against it.

SUNLIGHT

SENSOR
Test

Measure the voltage between the terminals with the sen-

sor out of direct sunlight.

• With the connector connected (probe the back of it):

1.4 ± 0.2 V

• With the connector disconnected: 0.1 — 0.2 VProCarManuals.com

Heater-Evaporator Unit

Replacement

SRS components are located in this area. Review the SRS
component locations, precautions, and procedures in the
SRS section (24) before performing repairs or service.
1.
Remove
the
blower
unit
(see
page
22-67 ('93-'96),
63('91-'92)).

2. When the engine is cool, drain the engine coolant from the radiator (see section 10).
Do not remove the radiator cap when

the engine is hot; the engine coolant is under

pressure and could severely scald you.

CAUTION: Engine coolant will damage paint. Quick-

ly rinse any spilled engine coolant off painted sur-

faces.
3. Disconnect the heater valve cable from the heater valve.

4.
Disconnect
the
heater hoses. Engine cootant
will
run out when the hoses are disconnected, drain it
into a clean drip pan.

HEATER

VALVE CASLE
HEATER VALVE
5. Recover the refrigerant from the A/C system with a
R-134a refrigerant Recovery/Recycling/Charging
System. (see page 22-73).
6. Disconnect the receiver line and the suction line from the evaporator. Cap the open fittings immediately
to keep moisture out of the system.

RECEIVER LINE

New parts (R-134a)

SECTION LINE

7. Remove the dashboard (see section 20).
8. Remove the heater duct. 9. Remove the four mounting bolts, disconnect the con-
nectors from the control units and the evaporator

temperature sensor connector from the control unit

bracket, then remove the control unit bracket.
*: CORROSION RESISTANT BOLT
EVAPORATOR

TEMPERATURE
SENSOR CONNECTOR
CONTROL

UNIT

BRACKET
SRS MAIN

HARNESS

* 6 x 1,0 mm
10 N·m
(1.0 kg-m,
7 Ib-ft)

* 6 x 1.0 mm
10 N·m (1.0 kg-m, 7 Ib-ft)
10. Remove the woofer enclosure (see section 23).ProCarManuals.com

Relay and Control Unit Locations

Dashboard

TURN SIGNAL/HAZARD

RELAY
CLIMATE CONTROL UNIT

UNDER-DASH FUSE BOX
FOOT WELL LIGHT

DASHBOARD

LOWER COVER

INTEGRATED

CONTROL UNIT
SRS UNITProCarManuals.com

Dashboard, Door and Floor

DRIVER'S DOOR PANEL

ABS CONTROL UNIT

DAYTIME RUNNING

LIGHTS CONTROL

UNIT (Canada)

POWER WINDOW

CONTROL UNIT

STARTER CUT RELAY

Wire colors: BLK/WHT,

BLK/WHT, BLK/GRN,

and BLK/BLU

SECURITY CONTROL UNIT

CIGARETTE LIGHTER

RELAY

Wire colors: YEL/RED,

BLU/GRN, BRN/YEL, and BLK
FOOT WELL BASS SPEAKER
EPS CONTROL UNIT

(Behind foot well

bass speaker)

RIGHT FRONT FLOOR

PANEL

SRS UNIT
POWER DOOR LOCK

CONTROL UNITProCarManuals.com

Gauge Assembl y
Removal
SRS component s ar e locate d in 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 service .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e floo r wir e harnes s connectors .
2 . Remov e th e tw o screws , the n remov e th e dashboar d
lowe r pa d fro m th e dashboard .
DASHBOAR DLOWER
COVE R
DASHBOAR DLOWER PA D
3. Remov e the thre e screws , then remov e the tilt cove r
fro m th e steerin g column .
TILT COVE R
4. Disconnec t th e connector s fro m th e instrumen t
pane l switches .
5 . Remov e th e si x screws , the n remov e th e instrumen t
pane l tri m fro m th e dashboard .
INSTRUMEN T PANE L TRI M
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Key Interloc k Solenoi d Tes t
1. Remov e th e dashboard lower cover , an d disconnec t
th e floo r wir e harnes s connectors .
DASHBOAR DLOWERCOVER
2. Disconnec t th e 8- P connecto r fro m th e floo r wir e
harness .
View fro m wir e sid e
3. Chec k fo r continuit y betwee n th e terminal s in eac h
switc h positio n accordin g t o th e table.
4 . Chec k tha t th e ke y canno t b e remove d wit h powe r
an d groun d connecte d t o th e C an d B terminals .
• I f th e ke y canno t b e removed , th e ke y interloc k
solenoi d is OK .
• I f th e ke y ca n b e removed , replac e th e steerin g
loc k assembl y (ke y interloc k solenoi d is no t avail -
abl e separately) .
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Safety Indicator
Indicator Input Test
SRS components are located in this area. Review the SRS
component locations, precautions, and procedures in the

SRS section (24) before performing repairs or service.
Remove the dashboard lower cover, dashboard lower
pad and instrument panel. Disconnect the connector "A"
(30-P) from the gauge assembly (see page 23-127 ('93-'96)
('91-'92)).

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 a 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.
CONNECTOR "B"
CONNECTOR "
A"

YEL


GRN/BLK
BLU

RED/YEL
RED/YEL

BLK

ORN/WHT

BLK/WHT GRN/RED

GRN/BLU

View from wire sideProCarManuals.com

A/T Gear Position Indicator
Indicator Input Test

SRS components are located in this area. Review the

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

vice.

Remove the dashboard lower cover, dashboard lower
pad and instrument panel. Disconnect the connector

"A" 130-P) from the gauge assembly (see page 23-127
('93-'96) ('91-'92)).

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 a 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.

CONNECTOR "A"

(30-P)
CONNECTOR "'B"

YEL
RED2

RED/BLK

BRN/YEL

ORN/BLK
GRN/YEL

LT GRN/WHT

BLK
BLU/ORN
RED1

YEL/BLK
LT BLU

GRY/WHT
GRN
BRN/BLK

View from wire sideProCarManuals.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

Lighting Syste m
Retracto r Switc h Remova l
SRS component s ar e locate d in 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 service .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e connectors .
2 . Remov e th e dashboar d lowe r pad .
DASHBOAR D LOWE R
COVE R
3. Remov e the tilt cover .
DASHBOAR D
LOWE R
PAD
TIL T COVE R
4. Remov e th e steerin g colum n covers .
UPPER COVE R
LOWE R COVE R
5. Disconnec t th e 5- P an d 10- P connector s fro m eac h
switch .
TCS SWITC H
5-P CONNECTO R
10- P CONNECTO R RETRACTO R SWITC H
6. Remov e th e si x screws, then remov e th e instrumen t
pane l tri m fro m th e dashboard .
INSTRUMEN T PANE L TRI M
RETRACTO R SWITC H
7. Remov e tw o screws , the n remov e th e retracto r
switc h fro m th e instrumen t pane l trim .
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