1991 ACURA NSX Service Repair Manual

Control Uni t Inpu t Tes t
SRS component s ar e locate d i n thi s area . Review the
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 .
Remov e th e bulkhea d panel , the n disconnec t th e con -
nector s fro m th e EC M an d mak e th e followin g tests .
Inspec t th e connecto r an d socke t terminal s t o b e sur e
the y ar e al l makin g goo d contact .
• I f th e terminal s ar e bent , loose , o r corroded , repai r
the m as necessary , an d rechec k th e system .
• I f th e terminal s loo k OK , mak e th e followin g inpu t
test s a t th e connector .
— If an y tes t indicate s a problem , fin d an d correc t
th e cause , the n rechec k th e system .
— If al l th e inpu t test s prov e OK , th e EC M mus t b e
faulty ; replac e it .
EC M
Vie w fro mwire sid eView fro m wir e sid e
Vie w fro mwire sid e
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Cruise Control

Control Unit Input Test

View from wire side
View from

wire side
View from wire side

No. Wire
Test condition
Test: Desired result
Possible cause if result is not obtainedProCarManuals.com

Main 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 R
COVE R
DASHBOARD LOWE R
PAD
3. Remov e the tilt cover .
TILT 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 col -
um n covers .
UPPER COVE R
LOWE R COVE R
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Cruise Control

Main Switch Replacement (cont'd)

5. Disconnect the 20-P, 4-P and 5-P connectors from

the floor wire harness.

CAUTION: Be careful not to damage the SRS wire

harness.

6. Remove the six screws, then remove the windshield

wiper-cruise control switch assembly.

5-P

CONNECTOR

WINDSHIELD

WIPER

SWITCH

CRUISE CONTROL SWITCH CONNECTOR

20-P

CONNECTOR

7. If necessary, replace the cruise control switch bulbs.

BULBS (0.91 W)

CRUISE CONTROL SWITCHProCarManuals.com

Cruise Contro l
Main Switc h Tes t
1. Remov e th e dashboar d lowe r cove r (se e page
23-305 ).
2 . I f necessary , remov e th e dashboar d lowe r pad .
3 . Disconnec t th e 20- P connector, and chec k fo r conti -
nuit y betwee n th e terminals , i n eac h switc h posi -
tion , accordin g t o th e table .
CRUIS ECONTRO LSWITCH
20- P CONNECTO R
Vie w fro m wir e sid e
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SET/RESUME Switc h Tes t
CAUTION : Befor e disconnectin g an y par t o f a n SR S wir e
harness , connec t th e shor t connector s (se e sectio n 24 ).
1 . Disconnec t th e cabl e ree l harnes s an d mai n
harnes s 6- P connector . Connec t tes t harnes s C onl y
t o th e cabl e ree l harnes s sid e o f th e 6- P connector .
CABLE REE LHARNES S
6- P CONNECTO R
TES T
HARNES S C
07LA Z - SL4030 0
2. Chec k fo r continuit y betwee n th e terminal s i n eac h
switc h positio n accordin g t o th e table .
If ther e i s n o continuity , chec k th e cabl e reel .
I f OK , g o t o ste p 3 . 3
. Remov e th e switc h cove r fro m th e SET/RESUM E
switch , the n remov e th e SET/RESUM E switc h b y
removin g th e tw o screws .
SET/RESUM ESWITCH
4. Chec k fo r continuit y betwee n th e terminal s i n eac h
switc h positio n accordin g t o th e tables .
If ther e is n o continuity , replac e th e switch .
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Cruise Contro l
Brake Switc h Tes t
1. Disconnec t th e 4- P connecto r fro m th e switch .
BRAKESWITC H
4-P CONNECTO R
BRAKEPEDAL
2. Chec k fo r continuit y betwee n th e terminal s accor -
din g t o th e table .
3 . I f necessary , replac e th e switc h o r adjus t peda l
heigh t (se e sectio n 19 ).
Clutc h Switc h Tes t
1. Disconnec t th e 3- P connecto r fro m th e switch .
CLUTCH
SWITC H 3- P CONNECTO R
CLUTC H BRAK E PEDA L
PEDAL
2. Chec k fo r continuit y betwee n th e terminal s accor -
din g t o th e table.
3 . I f necessary , replac e th e switc h o r adjus t peda l
height (se e sectio n 12 ).
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A/T Gea r Positio n Switc h Tes t
1. Remov e th e fron t console , the n disconnec t th e
12- P connecto r fro m th e A/ T gea r positio n switch .
2 . 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 .
• Mov e th e leve r bac k an d fort h a t eac h positio n
withou t touchin g th e pus h button , an d chec k fo r
continuit y withi n th e rang e o f fre e pla y o f th e
shif t lever .
• I f ther e is n o continuit y withi n th e rang e o f fre e
play , adjus t th e positio n o f th e A/ T gea r positio n
switc h (se e pag e 23-160 ).
A/ T GEA R POSITIO N SWITC H
12-P CONNECTO R
View fro m wir e side .
A/T Gea r Positio n Switc h (Fo r cruis e control )
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