1991 ACURA NSX Service Repair Manual

Relay and Control Unit Locations

Engine Compartment

REAR WINDOW DEFOGGER

RELAY
ENGINE COMPARTMENT

FAN RELAY (A/T)

Wire colors: YEL/BLK,

BLU/RED, WHT/GRN,

and WHT/BLU

SPARK PLUG VOLTAGE

DETECTION MODULE
ENGINE COMPARTMENT

FUSE/RELAY BOX

IGNITION CONTROL

MODULE (ICM)ProCarManuals.com

Battery
Componen t Locatio n Inde x
BATTER YType: 80D26 L (A/T )
70D23 L (M/T )
CHEC K INDICATO R
HEAT SHIEL D
Replacemen t
1. Remov e th e spar e tir e an d th e spar e tir e holder .
2. Disconnec t bot h th e negativ e cabl e an d positiv e cabl e fro m th e battery .
3. Remov e th e batter y holder , the n tak e ou t th e battery .
SPARE TIR E
SPARE TIRE HOLDER
BATTERY HOLDER
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Battery

Test

• Battery fluid (electrolyte) contains sulfuric acid. It may cause severe burns if it gets on your skin or in your eyes.

Wear protective clothing and a face shield.

— If electrolyte gets on your skin or clothes, rinse it off with water immediately.

— If electrolyte gets in your eyes, flush it out by splashing water in your eyes for at least 15 minutes; call a physician

immediately.

• A battery gives off hydrogen gas. If ignited, the hydrogen will explode and could crack the battery case and splatter

acid on you. Keep sparks, flames, and cigarettes away from the battery.

• Overcharging will raise the temperature of the electrolyte. This may force electrolyte to spray out of the battery vents.

Follow the charger manufacturer's instructions and charge the battery at a proper rate.

Use either a JCI or Bear ARBST tester, and follow the manufacturer's procedures. If you don't have one of these com-

puterized testers, follow this conventional test procedure:

To get accurate results, the temperature of the electrolyte must be between 70°F (21 °C) and 100°F (38°C).

Check For Damage

If the case is cracked or the posts are loose,

replace the battery.

Check Indicator EYE Color

If the indicator shows low electrolyte, add

distilled water if possible.

EYE Indicates OK
EYE Indicates LOW

CHARGE

Test Load Capacity (#1)

Apply 300 amp load for 15 seconds to remove

surface charge.

Allow 15 seconds recovery period.

Apply test load (see Test Load Chart).

Record voltage at the end of 15 seconds.

Stays above 9.6 volts;

battery is OK.
Drops below 9.6 volts.ProCarManuals.com

Charge on High Setting (40 amps)

Charge until EYE shows charge is OK; plus an

additional 30 minutes to assure full charge.

NOTE: If the battery charge is very low, it may

be necessary to bypass the charger's polarity

protection circuitry.

If the EYE does not show charge is OK within

three hours, the battery is no-good; replace it.

Write down how long the battery was charged.

Test Load Capacity (#2)

Apply 300 amp load for 15 seconds to remove surface charge.

Allow 15 seconds recovery period.

Apply test load (see Test Load Chart).

Record voltage at the end of 15 seconds.

Stays above 9.6 volts; battery is OK.

Drops below 9.6 volts; battery is no-good.

80D26L-MF

BATTERY CODEProCarManuals.com

Under-dash Fus e Bo x
Removal/Installatio n
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 in th e
SR S sectio n 24 befor e performin g repair s o r service .
Removal :
1. Disconnec t bot h th e negativ e cabl e an d positiv e
cabl e fro m th e battery .
2 . Carefull y remov e th e sid e sil l pa d (pul l i t up , rea r
en d first) .
3 . Remov e th e fus e bo x door .
FUSE BO XDOO R
SIDE SIL L PA D
SIDE SIL L TRI M
4. Remov e th e thre e screws , the n remov e th e sid e sil l
trim .
5. Remov e th e under-das h fus e bo x mountin g bolts . 6
. Disconnec t th e under-das h fus e bo x connectors .
NOTE : Th e SR S mai n harnes s connecto r i s doubl e
locked . T o remov e it , firs t lif t th e connecto r lid ,
the n pres s th e connecto r ta b dow n an d pul l th e
connecto r out .
TAB
SR S MAI N HARNES S
7. Tak e ou t th e under-das h fus e box .
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Installation:

1. Connect the connectors to the under-dash fuse

box.

NOTE: To reinstall the SRS main harness connec-

tor, push it into position until it clicks, then close

the connector lid.

2. Install the under-dash fuse box.

3. Install the side sill trim, fuse box door and door sill

pad.

FUSE BOX

DOOR

SIDE SILL PAD

SIDE SILL TRIM

4. Connect both the negative cable and positive cable

to the battery.

5. Confirm that all systems work properly.ProCarManuals.com

Ignition Switc h
Test
1. Remov e th e dashboar d lowe r cove r (se e nex t
column) .
2 . Disconnec t th e 7- P connecto r fro m th e floo r wir e
harness .
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.
WHT (BAT-A )
BLU/WH T (IG2-B ) Vie
w fro m
wir e sid e
BLK/WH T (ST )
WHT/BL K (BAT-B )
WHT/RE D (ACC )
Electrica l Switc h Replacemen t
1. Remov e th e dashboar d lowe r cove r an d disconnec t
th e floo r wir e harnes s connectors .
DASHBOAR D
LOWE R
COVE R
2. Disconnec t th e 7- P connecto r fro m th e floo r wir e
harness .
3. Inser t th e key , an d tur n it t o "0" .
4. Remov e th e tw o screws , an d replac e th e switch .
LOCK CYLINDE R
SWITC H
WHT
(IG2-A ) 7-
P CONNECTO R
BLK/YEL (IG1)
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Steering Loc k Removal/Installatio n
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 th e til t cover .
DASHBOAR D LOWE RPAD
TIL T COVE R
4. Remov e th e steerin g colum n lowe r an d uppe r cov -
ers.
NOTE : B e carefu l no t t o damag e th e steerin g colum n
covers.
UPPER COVE R
LOWE R COVE R
5. Remov e th e das h lowe r frame .
DASH LOWE R FRAM E
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