1991 ACURA NSX Service Repair Manual

Troubleshooting

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

CAUTION:
All SRS electrical wiring harnesses are covered with
yellow outer insulation.
Before disconnecting the SRS wire harness, install
the short connector on the airbag (see page 23-323). Replace the entire affected SRS harness assembly
if it has an open circuit or damaged wiring.

SRS MAIN WIRE HARNESS

DEFOGGER SWITCH
Removal, page 23-273

Test, page 23-275

REAR WINDOW DEFOGGER

Function Test, page 23-288

UNDER-DASH FUSE BOX
INTEGRATED

CONTROL UNIT
DEFOGGER

RELAY
ENGINE COMPARTMENT FUSE/RELAY BOX
Description Function:

The rear window defogger is controlled by the integrated control unit.

When the defogger switch in the combination switch is pushed, it sends a signal to the defogger timer in the integrated

contro
l
unit and the defogger stays on for 25 minutes or until the ignition swi\
tch is switched off.

The indicator light in the switch shows when the defogger is on.

Rear Window Defogger
Component
Location Index
ProCarManuals.com

Rear Window Defogger

Troubleshooting

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

Switch Removal
CAUTION: All SRS electrical wiring harnesses are covered withyellow outer insulation.Before disconnecting the SRS wire harness, install
the short connector on the airbag (see page 23-323). Replace the entire affected SRS harness assembly
if it has an open circuit or damaged wiring.
1. Remove the dashboard lower cover and disconnect the 2-P connectors from the floor wire harness.

2-P

CONNECTORS
LIGHTS-ON CHIME

FOOT LIGHT
DASHBOARD
LOWER COVER

2. Disconnect the 18-P connector from the floor wire harness.
CAUTION: Be careful not to damage SRS wires.

REAR WINDOW

DEFOGGER SWITCH

18-P

CONNECTOR

3.
Remove
the
tilt
cover.

TILT COVER
4. Remove the steering column lower cover and upper

cover.

NOTE: Be careful not to damage the steering column

covers.

5. Remove the 4 screws, then remove the rear window defogger switch and wiper/washer switch assembly.

REAR WINDOW
DEFOGGER

SWITCH

HAZARD

SWITCH

WINDSHIELD WIPER/WASHER
SWITCHProCarManuals.com

Troubleshooting

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

Intermittent Relay Test

1. Remove the wiper intermittent relay from sub relay

box B.

2. There should be continuity between the A and C ter-

minals when the battery is connected to the E and

F terminals.

The should be continuity between the B and C ter-

minals when the battery is disconnected.ProCarManuals.com

Wipers/Washers

Windshield Wiper Motor
Replacement

1. Open the hood and remove the cap nuts and the wiper arms.
NOTE: Carefully remove the wiper arms so that they
do not touch the hood.
2. Remove the windshield lower molding, hood seal and air scoop by prying off the trim clips and removing
the screws (see page 23-281).
3. Disconnect the 5-P connector from the wiper mo- tor assembly, then remove the 2 mounting bolts and
the wiper linkage assembly.

WIPER LINKAGE ASSEMBLY
5-P CONNECTOR

4. Remove the 3 mounting bolts and 1 nut from the wiper linkage assembly to remove the wiper motor.

NUT
18 N·m (1.8 kg-m, 12.8 Ib-ft)
MOUNTING

BOLTS

8 N·m
(0.8 kg-m.

5.7 Ib-ft)
WIPER LINKAGE
ASSEMBLY
WIPER MOTOR

5. Install the wiper motor assembly in the reverse ord- er of removal. Wiper/Washer Switch

Replacement

CAUTION: All SRS electrical wiring harnesses are covered with
yellow outer insulation.Before disconnecting the SRS wire harness, install
the short connector on the airbag (see page 23-323).
Replace the entire affected SRS harness assembly

if it has an open circuit or damaged wiring.

SRS MAIN WIRE HARNESS

1. Remove the dashboard lower cover and disconnect the 2-P connectors from the floor wire harness.

2-P

CONNECTORS
DASHBOAD LOWER

COVERProCarManuals.com

2. Disconnect the 18-P connector from the floor wire

harness.

CAUTION: Be careful not to damage the SRS wires.

WINDSHIELD WIPER/WASHER

SWITCH

HAZARD SWITCH

18-P

CONNECTOR

3.
Remove
the
tilt
cover.

TILT COVER
4. Remove the steering column lower cover and upper
cover.

UPPER COVER
LOWER COVER

NOTE: Be careful not to damage the steering
column covers.
5. Remove the 4 screws, then remove the hazard switch and wiper/washer switch assembly.

HAZARD

SWITCH
WINDSHIELD WIPER/WASHER
SWITCHProCarManuals.com

Cruise Control

CAUTION:
All SRS electrical wiring harnesses are covered with

yellow outer insulation.
Before disconnecting the SRS wire harness, install

the short connector on the airbag (see page 23-323).
Replace the entire affected SRS harness assembly

if it has an open circuit or damaged wiring.

SRS MAIN WIRE MARNESS
MAIN SWITCH
Test, page 23-295
Replacement, page 23-294
BRAKE LIGHT SWITCH

Test, page 23-308
INDICATOR LIGHT and
DIMMING CIRCUIT
(in the gauge assembly)
Bulb Locations, pages 23-128
CRUISE CONTROL UNIT
Input Test, page 23-292

SET/RESUME SWITCH

Test, page 23-307
Replacement, page 23-307
SHIFT POSITION

CONSOLE SWITCH (A/T)

Test, 23-309
Replacement, page 23-161
CLUTCH SWITCH (M/T)
Test, page 23-308
CABLE REEL

Test, page 23-250
Replacement, page 23-344
Component Location IndexProCarManuals.com