1991 ACURA NSX Service Repair Manual

Radiator an d Condense r Fa n Control s
Radiator Fa n Contro l Senso r Tes t
NOTE : Blee d ai r fro m th e coolin g syste m afte r install -
in g th e radiato r fa n contro l senso r (se e sectio n 10 ).
1 . Remov e th e radiato r fa n contro l senso r fro m th e
thermosta t cover .
2 . Suspen d th e radiato r fa n contro l senso r i n a con -
taine r o f coolan t a s shown .
THERMOMETE R
RADIATOR FA NCONTRO L SENSO R
ENGIN E
OIL
3. Hea t th e coolant , an d chec k coolan t temperatur e
with a thermomete r (se e tabl e below) .
4. Measur e th e resistanc e betwee n th e A an d B ter -
minal s accordin g t o th e table .
5 . I f unabl e t o obtai n th e abov e readings , replac e th e
radiato r fa n contro l sensor .
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Gauge Assembly
Gauge/Terminal Location Index
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.

SPEEDOMETER:

Indicates 60 mph [60km/h] at 1.026 [637]

rpm of the vehicle speed sensor (VSS).
FUEL GAUGE: Gauge test, page 23-134 Sending Unit Test, page 23-135

VOLTAGE METER:
If, with the No. 5 (15 A) fuse

and other gauges

OK, the pointer of the

voltage meter does not move at all,
replace the voltage

meter.

SAFETY INDICATOR SYSTEM:
See page 23-145 ('93-'96) ('91-'92)A/T GEAR POSITION
INDICATOR SYSTEM:
See page 23-156 ENGINE OIL PRESSURE
GAUGE:
Test page 23-137
ENGINE COOLANT TEMPERATURE (ECT) GAUGE:
Gauge Test, page 23-136 Sender Test, page 23-136
TACHOMETER:

Indicates 100 rpm at 300 pulses per minute

of the igniter unit.ProCarManuals.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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6. Remove the eight screws, then remove the steering

column covers.

UPPER COVER

LOWER COVER

7. Disconnect the 30-P connectors from both sides of

the gauge assembly.

30-P CONNECTORS
8. Lay a protective cloth on the combination switches

to prevent scratching the gauge assembly. Remove

the four screws, then take out the gauge assembly

as shown.

PROTECTIVE CLOTH
GAUGE

ASSEMBLYProCarManuals.com

Gauge Assembly

Bulb Locations

GAUGE LIGHTS (1.4W x 2)

SRS INDICATOR LIGHT (1.4 W)

RIGHT TURN SIGNAL INDICATOR LIGHT (1.4 W)

EPS INDICATOR LIGHT (1.4 W)

BRAKE SYSTEM LIGHT (1.4 W)

SEAT BELT REMINDER LIGHT (1.4 W)

TCS INDICATOR

LIGHT (1.96 W)

LOW FUEL INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)
HIGH BEAM INDICATOR LIGHT (1.4 W)

LEFT TURN SIGNAL INDICATOR LIGHT (1.4 W)

ABS

INDICATOR LIGHT (1.4 W)

CHARGING SYSTEM LIGHT (1.4 W)

MALFUNCTION

INDICATOR

LAMP (MIL)

(1.4W)

LOW OIL PRESSURE

INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)

GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
CRUISE INDICATOR LIGHT

(1.96
W)ProCarManuals.com

Disassembly

NOTE:
Handle the terminals and printed circuit boards carefully to avoid damaging them.
Replace
the
speedometer,
trip
meter,
and
printed
circuit
board
A as a
unit
if any of
them
is
faulty. Replace the tachometer, odometer, and printed circuit board B as a unit if any of them is faulty.

SPEEDOMETER MOUNTING SCREWS (x3) TACHOMETER MOUNTING SCREWS (x3)
VOLTAGE/FUEL GAUGE
MOUNTING SCREWS (x5) ENGINE COOLANT TEMP./ENGINE OIL PRESSURE
GAUGE MOUNTING SCREWS (x6)
HOUSING
ENGINE COOLANT

TEMPERATURE/

ENGINE OIL PRESSURE GAUGE

Test, page 23-136 and 137

SAFETY INDICATOR
MOUNTING SCREWS (x2) SHIFT INDICATOR
TACHOMETER

Specification, page 23-121
A/T GEAR POSITION
INDICATOR

See page 23-152 ('94-'96) ('91-'93)


LIGHT HOUSING
ODOMETER
SPEEDOMETER

Specification, page 23-121

TRIP METER FUEL/VOLTAGE GAUGE

Test, page 23-121

and 134

FACE PANEL PRINTED CIRCUIT
BOARD B
BOARD-TO-BOARD

CONNECTOR

PRINTED CIRCUIT
BOARD COVER
PRINTED CIRCUIT
BOARD A
SAFETY INDICATOR

See page 23-145 ('93-'96)('91-'92)

TRIP METER
RESET BUTTON
VISORProCarManuals.com

Speedometer/Trip Meter/Odometer

Troubleshooting

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

View from the back of the gauge assemblyProCarManuals.com

NOTE: A shor t t o groun d i n th e OR N wir e ca n b e cause d b y a shor t i n an y componen t connecte d t o it .
Vehicl e Spee d Senso r (VSS ) Tes t
Speedomete r doe s no t work.
Inspec t No . 5 (1 5 A ) fus e in th e
under-das h fus e bo x befor e
testing .
Disconnec t th e 3- P connecto r
fro m th e VSS .
Turn th e ignitio n switc h O N (II) .
Measur e voltag e betwee n th e YE L
wir e termina l an d th e BL K wir e
termina l i n th e harnes s sid e o f th e
3- P connector .
I s ther e batter y voltage ?
Measur e voltag e betwee n th e
OR N an d th e BL K wir e terminals .
I s ther e abou t 5 V ?
(T o page 23-132 ) Vie
w fro m
termina l sid e
, BL K 3- P CONNECTO R
VSS
Is ther e continuity ?
Repai r ope n in th e OR N wir e o r
shor t t o bod y ground .Repair ope n betwee nthe VS S an d groun dG101.
Repai r ope n in th e YE L wir e be -
twee n th e VS S an d under-das h
fuse box .
Chec k fo r continuit y betwee n th eBLK termina l an d bod y ground .
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