1991 ACURA NSX Service Repair Manual

Back-up Lights
Component Location Index

A/T GEAR POSITION SWITCH
(Back-u
p
light switch)

Test, page 23-160 ('93-'96) ('91-'92).

UNDER-DASH

FUSE BOX BACK-UP LIGHT SWITCH (M/T)

Test, page 23-208 ('93-'96) ('91-'92).

BACK-UP LIGHTS

Bulb replacement, page 23-206ProCarManuals.com

G551 '93-'96 Models )
G551 '93-'96 Models)
Back-up Lights

Test

Manual Transmission:

1
.
If only one back-up right does not go on, check that
bul
b
in the taillight.
2
.
If neither back-up light goes on, check the No. 5 (15

A) fuse in the under-dash fuse box.

3
.
If the fuse and bulbs are OK, disconnect the connec- to

r
from the back-up light switch on the transmis-
sio
n
housing.

BACK-UP
LJGHT SWITCH
25 N·m (2.5 kg-m, 18 Ib-ft)
This washer must
always be replaced
for the switch to
function properly and to prevent oil

leaks.

B(GRN/BLK)
A(YEL)
TRANSMISSION HOUSING

4. Check for continuity between the A (YEL) and B (GRN/BLK) wires with the switch installed. There
should be continuity with the shift lever in reverse.

If there is no continuity, replace the switch.

If there is continuity, but the back-up lights do not
go on, check for:
— Poor ground (G501 '91-'92 Models or
— An open in the YEL or GRN/BLK wire. 4. Check for continuity between the No. 9 and No. 10 terminals. Move the lever back and forth at the

position without touching the push button, and

check for continuity within the range of free play.
If there is no continuity within the range of freeplay, adjust the position of the A/T gear position
switch (see page 23-160) ('93-'96) ('91-'92).
ff there is continuity, but the back-up tights do not go on, check for:
— Poor ground (G501 '91-'92 Models or
— An open in the YEL or GRN/BLK wire.
A/T GEAR POSITION

SWITCH

View from

wire side

Automatic Transmission:

1
.
If only one back-up light does not go on, check that
bul
b
in the taillight.
2
.
If neither back-up light goes on. check the No. 5 (15

A) fuse in the under-dash fuse box.

3
.
If the fuse and bulbs are OK, disconnect the 12-P
connector from the A/T gear position switch (back-
u
p
light switch).
ProCarManuals.com

Brake Lights

Component Location Index

BRAKE SWITCH
Test, page 23-211

HIGH MOUNT BRAKE LIGHT (LED)
LED Replacement, page 23-212
('94-'96) ('91-'93)

Replacement, page 23-212 ('94-'96) ('91-'93) Test, page 23-211

RIGHT TAILLIGHT
Bul
b
Replacement, page 23-196
Failure Sensor Test, page 23-153
LEFT TAILLIGHT Bulb Replacement, page 23-196 Failure Sensor Test, page 23-153
ProCarManuals.com

(G551) '95-'96 Models.
(G401,G402,G551) '93-94 Models or
Brake Switch
Test

1
.
If one of the brake lights does not go on, check that
brake
light bulb in the taillight or the high mount light
2
.
If none of the brake lights 90 on, check the No. 45 (2

0
A) fuse in the under-hood fuse/relay box.
3

.
If the fuse and bubs are OK, disconnect the 4-P con- necto

r
from the brake switch.

4-P CONNECTOR

BRAKE

SWITCH
BRAKE
PEDAL

4. Check for continuity between the B and C terminals. There should be continuity with the brake pedal

pushed.

If there is no continuity, replace the switch or ad-
just pedal height (see section 19).
If there is continuity, but the brake lights do not
go on, inspect for:
Poor ground (G401,G501) '91-'92 Models or
An open in the WHT/GRN or GRN/WHT wire. Faulty brake light failure sensors (see page 23-153). High Mount Brake Light Test
1. Open the trunk lid and engine compartment lid.
2. Disconnect the 2-P connector from the trunk wire
harness.

TRUNK WIRE HARNESS

SIDE WIRE
HARNESS

View from terminal side
View from

terminal

side
3. Connect a voltmeter positive lead to the GRN/WHT terminal and the negative lead to the BLK terminalof the side wire harness side of the connector.
Push the brake pedal, and check for voltage between
the GRN/WHT and the BLK terminals. There should be battery voltage. If there is no voltage, check for:
— Blown No. 45 (20 A) fuse in the under-hood
fuse/relay box.
— An open in the GRN/WHT or BLK wire.
— Faulty brake switch.
If there is battery voltage, go to step 4.
4. Connect battery power to the GRN/WHT terminal and ground to the BLK terminal of the trunk wireharness side of the connector.
Check that all the LEDs of the high mount brake light

go on.

If the high mount brake light does not go on,check for an open in the wires
in the trunk lid.
If the wires in the trunk lid are OK, replace the
high mount brake light.
If some of the LEDs do not go on,
replace the high
mount brake light assembly.
GRN/WHT BLK


BLK GRN/WHTProCarManuals.com

Brake Lights

High Mount Brake Light Replacement

CAUTION: Be careful not to damage the high mount

brake light, rear spoiler, and trunk lid.

1. Open the trunk lid.

2. Remove the caps and five screws from the rear

spoiler.

REAR

SPOILER

SCREW

CAP

3. Carefully pull the high mount brake light out of the

rear spoiler, then disconnect the 2-P connector from

the high mount brake light.

REAR SPOILER

2-P CONNECTOR

HIGH MOUNT BRAKE LIGHT

(LED)
Rear Spoiler Replacement

CAUTION: Be careful not to damage the high mount

brake light, rear spoiler, and trunk lid.

1. Open the trunk lid.

2. Remove the six mounting nuts.

REAR

SPOILER

3.
Carefully
lift
the
rear
spoiler assembly
off the
rear

trunk lid.

REAR SPOILER

2-P CONNECTOR (Trunk sub-harness side)

4. Disconnect the 2-P connector from the trunk sub-

harness.ProCarManuals.com

Side Marker/Turn Signal/Hazard Flasher System
Component 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.

TURN SIGNAL INDICATOR LIGHTS(In the gauge assembly)
Gauge Assembly, page 23-125 HAZARD WARNING SWITCH
Removal, page 23-220
Test, page 23-221
HEADLIGHT SWITCH
Test, page 23-181
Replacement, page 23-182
TURN SIGNAL/HAZARD RELAY
Input Test, page 23-218

UNDER-DASH FUSE BOX TURN SIGNAL SWITCH

Test, page 23-181

Replacement, page 23-182 TURN SIGNAL CANCEL UNIT

Input Test, page 23-219

SIDE MARKER FLASHER CIRCUIT

(In the integrated control unit)

Input Test, page 23-168 ('94-'96) ('91-'93)ProCarManuals.com

Side Marker/Turn Signal/Hazard Flasher System

Description

To cope with dimensional requirements for the airbag components and to offer better operational feel, the turn signal

lever and the cancel mechanism are separated mechanically, and connected electrically instead.

The system cancels the turn signals electrically, by means of a solenoid, after a turn is made. A sensor mechanism which

consists of cancel cams on the steering shaft, and a pair of switches, is used to monitor the steering shaft's position.

STEERING SHAFT

CANCEL CAM

CANCEL SWITCH

TURN SIGNAL LEVER

SOLENOIDProCarManuals.com

A cam plate is installed around the steering shaft. A pair of switches (A and B) are installed beside it.

When the steering is turned in direction of the arrow, switch A turns on first.

Then switch B turns on.

The cancel unit monitors the on-off sequence of both switches. Once it receives a full set of signals for a right or left

turn, it energizes the solenoid which then moves the turn signal lever back to neutral.

RIGHT TURN SIGNAL

LEFT TURN SIGNALProCarManuals.com