1997 ACURA NSX Service Repair Manual

Cancel Unit Input Test

1. Remove the steering column covers. Disconnect the

10P connector from the turn signal cancel unit.

2. Inspect the connector terminals to be sure they are

all making good contact.

If the terminals are bent, loose or corroded, repair

them as necessary, and recheck the system.

If the terminals look OK, make the following input

tests at the connector.

— If any test indicates a problem, find and correct

the cause, then recheck the system.

— If all the input tests prove OK, the control unit

must be faulty; replace it.
10P CONNECTOR
TURN SIGNAL

CANCEL UNIT

Terminal
Test condition
Test: Desired result
Possible cause if result is not obtained

C10

(BLK)
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

C1

(GRY/RED)
Ignition switch on (II)
Check for voltage to ground:

There should be battery voltage.
• Blown No. 5 (15 A) fuse

• An open in the wire

C5

(PUR)
Headlight switch
Check for voltage to ground:

There should be approx. 5 volt.
• Faulty headlight switch or taillight

relay

• An open in the wire

C2

(BRN)
Turn signal switch in

right position

C6

(GRY)
Check for continuity between the C2

and C6 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C2

(BRN)
Turn signal switch in left

position

C9

(GRN/BLK)
Check for continuity between the C2

and C9 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C3

(ORN)
Under all conditions

C4

(WHT)
Check for continuity between the C3

and C4 terminals:

There should be continuity.
• Faulty cancel solenoid

• An open in the wire

C7

(BLU/YEL)
Connect the C1 terminal

to the C7 terminal, then

turn the ignition switch

ON
(II).
The right turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wire

C8

(BLU/GRN)
Connect the C1 terminal

to the C8 terminal, then

turn the ignition switch

ON
(II).
The left turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wireProCarManuals.com

Side Marker/Tur n Signal/Hazar d Flashe r Syste m
Hazard Warnin g Switc h Replacemen t
SRS component s ar e locate d i n 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 ser -
vice .
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 RCOVER
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 covers .
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. Disconnec t th e 20P , 4P , an d 5 P connectors .
CAUTION : B e carefu l no t t o damag e th e SR S wir e
harness .
6. Remov e th e si x screws , the n remov e th e hazar d
warning-wipe r switc h assembly .
5P CONNECTO R
HAZARDWARNIN G
SWITC H
20 P CONNECTO R
4 P CONNECTO R
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7. Remove the screws, then separate the hazard warn-

ing switch from the other switches.

HAZARD WARNING

SWITCH

8. If necessary, remove the hazard warning switch

bulb.

HAZARD WARNING SWITCH

BULB (0.91 W)ProCarManuals.com

Hazard Warnin g Switc h Tes t
1. Remov e th e dashboar d lowe r cove r (se e pag e
23-222 ).
2 . Disconnec t th e 20 P connecto r fro m th e floo r wir e
harness .
3. Chec k fo r continuit y betwee n th e terminals , i n eac h
switc h position , accordin g t o th e table .
HAZAR D WARNIN G SWITC H
20P CONNECTO R
View fro m wir e sid eTermina l N isno t used .
OFF
ON
Positio n
Termina lFDENGH
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Dash Light s Brightnes s Contro l
Componen t Locatio n Inde x ——————
TRANSMISSIO NCONTROL MODUL E (TCM )
DASH LIGHT S BRIGHTNES S
CONTROL UNI TInpu t Test , pag e 23-22 6
COMBINATIO N LIGH T SWITC H
Test , pag e 23-18 3
Replacement , pag e 23-18 4
HEADLIGH T RETRACTO RSWITCH DAS
H LIGHT S BRIGHTNES S
CONTROLLERTest, pag e 23-22 8
Removal , pag e 23-22 7
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Dash Lights Brightness Control

Control Unit Input Test

1. Disconnect the 7P connector from the control unit.

2. Inspect the connector and socket terminals to be sure

they are all making good contact.

If the terminals are bent, loose or corroded, repair

them as necessary, and recheck the system.

If the terminals look OK, make the following input

tests at the connector.

— If any test indicates a problem, find and correct

the cause, then recheck the system.

— If all the input tests prove OK, the control unit

must be faulty; replace it.

BLK

DASH LIGHTS

BRIGHTNESS

CONTROL UNIT

7P CONNECTOR
View from wire side

RED/BLK

Terminal
Test condition
RED/WHT

Test: Desired result
RED

Possible cause if result is not obtained

BLK

RED/BLK

RED

RED/GRN

and

RED/WHT
Under all conditions

Headlight switch ON

Headlight switch ON

Adjusting dial rotating
Check for continuity to ground:

There should be continuity.

Check for voltage to ground:

There should be battery voltage.

Attach to ground: The dash lights

should come on full bright.

Check for resistance between the

RED/GRN and RED/WHT terminals:

It should vary from 0 to 20,000

ohms as the dial is rotated.
• Poor ground (G401, G402, G403)

• An open in the wire

• Blown No. 38 (15 A) fuse

• Faulty taillight relay

• Faulty headlight switch

• An open in the wire

• An open in the RED/BLK or RED

wire

• Faulty dash lights brightness con-

troller

• An open in the wire
RED/GRNProCarManuals.com

Controller Remova l
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
the connectors .
2. Remov e th e dashboar d lowe r pad .
DASHBOAR D LOWE RCOVER
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 covers .
UPPER COVE R
LOWER COVE R
5P CONNECTO R
10 P CONNECTO RDAS
H LIGHT S BRIGHTNES S
CONTROLLE R
6. 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
DAS H LIGHT S BRIGHTNES S
CONTROLLE R
7. Remov e tw o screws , the n remov e th e das h light s
brightnes s controlle r fro m th e instrumen t pane l trim .
5
. Disconnec t th e 5 P an d 10 P connector s fro m eac h
switch .
TCS SWITC H
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1. Remove the dash lights brightness controller from

the instrument panel trim (see previous page).

2. Measure resistance between A and B terminals

while rotating the adjusting dial. Resistance should

vary from 0 to 20,000 ohms as the dial is rotated.

NOTE: Resistance will vary slightly with temperature.

HEADLIGHT

RETRACTOR SWITCH
ADJUSTING

DIAL

DASH LIGHTS

BRIGHTNESS

CONTROLLER
Controller Light Bulb Replacement

1. Remove the dash lights brightness controller.

2. Turn the socket 45° counterclockwise to remove it.

BULB (0.84 W)
Dash Lights Brightness Control

Controller TestProCarManuals.com