1991 ACURA NSX Service Repair Manual

Dashboard, Door and Floor

DRIVER'S DOOR PANEL
POWER WINDOW
CONTROL UNIT
CIGARETTE LIGHTER

RELAY
SRS UNIT
FOOT WELL BASS SPEAKER RIGHT FRONT FLOOR

PANEL
EPS POWER UNIT

(Behind foot well

bass speaker)
SECURITY CONTROL UNIT

DAYTIME RUNNING

LIGHTS CONTROL
UNIT (Canada)

ABS CONTROL UNIT

CRUISE CONTROL UNIT
EPS CONTROL UNIT
(A/T)

POWER DOOR LOCK
CONTROL UNIT
Wire colors: YEL/RED, BLU/GRN, BRN/YEL, and BLKProCarManuals.com

Relay and Control Unit Locations
Rear Bulkhead
FAN CONTROL

UNIT

ECM

TCS FAIL-SAFE

RELAY

Wire colors: YEL,
and LT GRN/BLK TRANSMISSION CONTROL
MODULE (TCM)
DASH LIGHTS
BRIGHTNESS
CONTROL UNIT
TCS CONTROL UNIT

GRN/RED, RED/BLK,ProCarManuals.com

RETRACTABLE HEADLIGHT

CONTROL UNIT
INTERLOCK CONTROL

UNIT (A/T)

FUEL PUMP RELAY

Wire colors: YEL, RED,

BLK/YEL, and BLK/REDProCarManuals.com

Relay and Control Unit Locations

Engine Compartment

REAR WINDOW DEFOGGER

RELAY

ENGINE COMPARTMENT

FUSE/RELAY BOX
ENGINE COMPARTMENT

FAN RELAY

Wire colors: YEL/BLU,

BLK/YEL, WHT/RED,

and WHT/BLU

IGNITION CONTROL

MODULE (ICM)ProCarManuals.com

Under-dash Fuse Box

CAUTION:
All SRS wiring harnesses are covered with yellow
outer insulation.
Before disconnecting any part of the SRS wire
harness, install the short connectors (see page

24-10 ('93-'96)).
Replace the entire affected SRS harness assembly if
it has an open circuit or damaged wiring.

SRS MAIN
HARNESS
Removal:

1. Disconnect both the negative cable and positive
cable from the battery.

2.
Carefully remove
the
side
sill
pad
(pull
it up.
rear
end first).

3. Remove the fuse box door.

FUSE BOX

DOOR

SIDE SILL PAD

SIDE SILL TRIM

4. Remove the three screws, then remove the side sill
trim.

5. Remove the under-dash fuse box mounting bolts.
Removal/InstallationProCarManuals.com

6. Disconnect the under-dash fuse box connectors.
NOTE: The SRS main harness connector is double
locked. To remove it, first lift the connector lid,
then press the connector tab down and pull the connector out. 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.
4. Connect both the negative cable and positive cable to the battery.
5. Confirm that all systems work properly.
7. Take out the under-dash fuse box.
TAB

LID

SRS FUSE

No. 1 (10 A)

SRS MAIN HARNESS
SIDE SILL TRIM
FUSE BOX
DOOR
SIDE SILL PADProCarManuals.com

Steering Lock Removal/Installation
SRS wire harness is routed near the steering lock
assembly.
CAUTION:All SRS wiring harnesses are covered with
yellow outer insulation.Before disconnecting any part of the SRS wire
harness, install the short connectors (see page

23-328).

Replace the entire affected SRS harness
assembly if it has an open circuit or damaged
wiring. 4. Remove the column holder mounting bolts.
5. Remove the mounting nuts.

39 N·m

(3.9 kg-m, 28 Ib-ft)
16 N·m

(1.6 kg-m, 12 Ib-ft)
6. Disconnect the 7-P and 8-P connectors. 7. Lower the steering column assembly.
8. Center punch the shear bolt and drill its head off
with a 5 mm (3/16 in) drill bit.

CAUTION: Do not damage the switch body.
9. Remove the shear bolt from the switch body.
(cont'd)

Removal:

1. Remove the dashboard lower cover and knee bolster pad.
2. Remove the steering column covers. 3. Remove the knee bolster and dash lower frame.

KNEE BOLSTER
DASH LOWER FRAME
SRS MAIN

HARNESSProCarManuals.com

Ignition Switch

Steering Lock Removal/Installation (cont'd)

10. Insert the key and turn it to "I".

STEERING LOCK

BODY

11. Push the lock pin and pull out the steering lock

assembly.

TWIST-OFF PORTION
SHEAR BOLT
Installation:

1. Turn the key to "I", push the pin and insert the

steering lock assembly into the steering column un-

til it clicks into place.

2. Loosely tighten the new shear bolt. Make sure the

projection on the ignition switch is aligned with the

hole in the steering column.

3. Insert the ignition key and check for proper opera-

tion of the steering wheel lock and that the ignition

key turns freely.

4. Tighten the shear bolt until the hex head twists off.ProCarManuals.com