ACURA TL 1995 Service Repair Manual

(From pag e 11-112 )
ECM CONNECTOR S
A (26P)
Wire sid e o f femal e terminal s
I s ther e les s tha n 1. 0 V ? Repai
r ope n i n th e wir e be -
twee n th e EC M (B4 ) an d th e
gaug e assembly .Repair ope n in RE D wir e be -
twee n th e gaug e assembl y
an d th e A/ T gea r positio n
switch.
Check fo r a n ope n in th e wir e (AT PPN line) :Measur e voltag e betwee n EC M
connecto r terminal s B 4 an d A2 6
with th e transmissio n i n posi -tion.
Is ther e les s tha n 1. 0 V ? Repai
r ope n in BLK/BL U wir e be -
twee n th e gaug e assembl y an d
th e A/ T gea r positio n switch .
A/ T gea r positio n signa l i s OK .
Chec
k fo r a n ope n in th e wir e (AT P
P N line) :
1. Tur n th e ignitio n switc h OFF .2. Reconnec t th e 16 P connecto r
t o th e gaug e assembly .
3 . Reconnec t th e 26 P connecto r
to th e TCM .4. Star t th e engine .
5 . Measur e voltag e betwee n EC M
connecto r terminal s B 4 an d
A26 wit h th e transmissio n inposition .
B (16P)
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Idle Contro l Syste m
Power Steerin g Pressur e (PSP ) Switc h Signa l
This signal s th e EC M whe n th e powe r steerin g loa d is high .
Is ther e les s tha n 1. 0 V ?
Chec k th e operatio n o f th e PS Pswitch :
1 . Star t th e engin e
2 . Tur n steerin g whee l t o ful l
lock .3. Measur e voltag e betwee n EC M
connecto r terminal s B1 2 an d
A26 .
Is ther e batter y voltage ?
ECM CONNECTOR S
A (26P)B (16P)
Chec k fo r a n ope n in th e wir e (PS P
S W line) :
1 . Tur n th e ignitio n switc h OFF .
2. Disconnec t th e PS P switc h 2 Pconnector .3. Tur n th e ignitio n switc h O N (II) .
4 . A t th e harnes s side , connec t
th e PS P switc h 2 P connecto r
terminal s No . 1 an d No . 2
wit h a jumpe r wire .5. Measur e voltag e betwee n EC M
connecto r terminal s B1 2 an d
A26 .
Is ther e les s tha n 1. 0 V ? Repai
r ope n i n th e wir e be -
twee n th e EC M (B12 ) an d th e
PS P switch .
Repai r ope n in BL K wir e be -
twee n th e PS P switc h an d
G301 .
(To pag e 11-115 )PSP switc h signa l i s OK . Replac
e th e PS P switch . Wir
e sid e o f femal e terminal s
JUMPERWIRE
PSP SWITC H CONNECTO R (C309 )
Wire side of femal e terminal s
Chec
k fo r a n ope n in th e wir e (PS P
S W line) :1. Tur n th e ignitio n switc h O N (II) .2. Measur e voltag e betwee n EC M
connecto r terminal s B1 2 an d
A26 .
Inspectio n o f PS P switc h signal .
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(From pag e 11-114 )
Chec k fo r a shor t i n th e PS P
switch :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e 2 P connecto r
fro m th e PS P switch .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n EC M
connecto r terminal s B1 2 an d
A26 .
ECM CONNECTOR S
A (26P)B (16P)
Wire sid e o f femal e terminal s
I s ther e batter y voltage ?
B (16P)
Is ther e continuity ? Repai
r shor t i n th e wir e betwee nthe EC M (B12 ) and th e PS Pswitch .
Substitut e a known-goo d EC M
an d recheck . I f prescribe d volt -
ag e is no w available , replac e th e
origina l ECM .
Replac
e th e PS P switch .
Check fo r a shor t i n th e wir e (PS PSW line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e EC M connec -
tor B (16P) .3. Chec k fo r continuit y betwee n
bod y groun d an d EC M connec -
to r termina l B12 .
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Idle Contro l Syste m
Fast Idl e Therm o Valv e
Descriptio n
T o preven t errati c runnin g whe n th e engin e i s warmin g
up , i t i s necessar y t o rais e th e idl e speed . Th e fas t idl e
therm o valv e i s controlle d b y a thermowa x plunger .
When th e engin e i s cold , th e engin e coolan t surround -
in g th e thermowa x contract s th e plunger , allowin g addi -
tiona l ai r t o b e bypasse d int o th e intak e manifol d s o tha t
th e engin e idle s faster . Whe n th e engin e reache s operat -
in g temperature , th e valv e closes , reducin g th e amoun t
o f ai r bypassin g int o th e intak e manifold .
FASTIDLE THERM O VALV E
IDLEADJUSTIN GSCREW
IAC VALV E
AIR BYPAS SVALVE
WAX
Inspectio n
NOTE : Th e fas t idl e therm o valv e i s factor y adjusted ; i t
shoul d no t b e disassembled .
1. Remov e th e cove r o f th e fas t idl e therm o valve .
2 . Star t th e engine .
3.Pu t you r finge r o n th e valv e sea t are a an d mak e sur e
tha t ther e i s ai r flo w wit h th e engin e col d (engin e
coolan t temperatur e belo w 86°F , 30°C ) an d idling .
FAST IDL E THERM O VALV E
If not , replac e th e fas t idl e therm o valv e an d retest .
O-RING SReplace .
12 N- m(1.2 kgf-m , 8. 7 Ibf-ft )
4.
5 .
Star t th e engine . Hol d th e engin e a t 3,00 0 rp m wit h n o
loa d (transmissio n in o r position ) unti l th e radia -
to r fa n come s on , the n le t i t idle .
Chec k tha t th e valv e i s completel y closed . I f not , ai r
suctio n ca n b e fel t i n th e valv e sea t area .
I f an y suctio n is felt , th e valv e is leaking .
Chec k engin e coolan t leve l an d fo r ai r i n th e engin e
coolin g syste m (se e sectio n 10 ).
I f OK , replac e th e fas t idl e therm o valv e an d recheck .
NOTE : I f th e cove r o f fas t idl e therm o valv e wa s removed ,
d o th e EC M rese t procedure .
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Idle Spee d Settin g
Inspection/Adjustmen t
NOTE:
• Befor e settin g th e idl e speed , chec k th e followin g
items:
— Th e MI L ha s no t bee n reporte d on .
— Ignitio n timin g
— Spar k plug s
— Ai r cleane r
— PC V syste m
• (Canada ) Pul l th e parkin g brak e leve r up . Star t th e
engine , the n chec k tha t th e headlight s ar e off .
1 . Star t th e engine . Hol d th e engine at 3,00 0 rp m wit h
no loa d (transmissio n i n o r position ) unti l th e
radiato r fa n come s on , the n le t i t idle .
2 . Connec t a tachometer .
3 . Disconnec t th e IA C valv e connector .
IAC VALV E
4.
5.
Star t th e engin e wit h th e accelerato r peda l slightl y
depressed . Stabiliz e th e rp m a t 1,000 , the n slowl y
releas e th e peda l unti l th e engin e idles .
Check idlin g in no-loa d conditions : headlights , blow -
er fan , rea r defogger , radiato r fan , an d ai r conditione r
ar e no t operating .
Idl e spee d shoul d be :
550 ± 5 0 rp m
(in o r position )
Adjust th e idl e speed , i f necessary, by turnin g th e
idl e adjustin g screw .
NOTE : Afte r adjustin g th e idl e spee d i n thi s step ,
rechec k th e ignitio n timin g (se e sectio n 23 ).
I f i t i s ou t o f spec , g o bac k t o ste p 4 .
IDL E ADJUSTIN G SCRE W
6. Tur n th e ignitio n switc h OFF .
7 . Reconnec t th e 2 P connecto r o n th e IA C valve , the n
d o th e EC M rese t procedure .
8 . Restar t an d idl e th e engine with no-loa d condition s
fo r on e minute , the n chec k th e idl e speed .
NOTE : (Canada ) Pul l th e parkin g brak e leve r up .
Star t th e engine , the n chec k tha t th e headlight s ar e
off.
Idle spee d shoul d be :
700 ± 5 0 rp m
(in o r position )
9 . Idl e th e engin e fo r on e minut e wit h headlight s (Low )
O N an d chec k th e idl e speed .
Idl e spee d shoul d be :
770 ± 5 0 rp m
(in o r position )
10 . Tur n th e headlight s off .
Idl e th e engin e fo r on e minut e wit h heate r fa n switc h
a t H I an d ai r conditione r on , the n chec k th e idl e speed .
Idl e spee d shoul d be :
770 ± 5 0 rp m
(in o r position )
NOTE : I f th e idl e spee d i s no t withi n specification ,
se e Sympto m Char t o n pag e 11-36 .
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Fuel Supply System

Fuel Lines

NOTE: Check all fuel system lines, hoses, and components for damage, leaks and deterioration, and replace if necessary.

'95 - 96 models:

27 N-m

(2.8 kgf-m,

20 Ibf-ft)
27 N-m

(2.8 kgf-m,

20 Ibf-ft)

'97 - 98 models:
37 N-m

(3.8 kgf-m, 27 Ibf-ft)

27 N-m

(2.8 kgf-m,

20 Ibf-ft)
33 N-m

(3.4 kgf-m, 25 Ibf-ft)

37 N-m

(3.8 kgf-m, 27 Ibf-ft)ProCarManuals.com

'95 - 96 models:

NOTE: Check all hose clamps and retighten if necessary.

To

FUEL

PRESSURE

REGULATOR
BASE PACKING

Replace.

10-15
mm

(0.39-0.59 in)
Clamp in the middle.

Clamp in the middle.ProCarManuals.com

Fuel Supply System

Fuel Lines (cont'd)

'97 - 98 models:

NOTE: Check all hose clamps and retighten if necessary.

To

FUEL

PRESSURE

REGULATOR
BASE PACKING

Replace.

10- 15 mm

(0.39
-
0.59
in)
Clamp in the middle.

Clamp in the middle.ProCarManuals.com

Fuel Tube/Quick-Connec t Fitting s
Precaution s
Do no t smok e whil e workin g o n th e fue l
system . Kee p ope n flame s awa y fro m you r wor k area .
Th e fue l tube/quick-connec t fitting s assembl y connect s
th e in-tan k fue l pum p wit h th e fue l fee d pipe . Fo r remov -
in g o r installin g th e fue l pum p an d fue l tank , i t i s neces -
sar y t o disconnec t o r connec t th e quick-connec t fittings .
Pay attentio n to following :
The fue l tube/quick-connec t fitting s assembl y i s no t
heat-resistant ; b e carefu l no t t o damag e it durin g weld -
in g o r othe r heat-generatin g procedures .
Th e fue l tube/quick-connec t fitting s assembl y i s no t
acid-proof ; d o no t touc h i t wit h a sho p towe l whic h
wa s use d fo r wipin g batter y electrolyte . Replac e th e
fue l tube/quick-connec t fitting s assembl y i f i t cam e
int o contac t wit h electrolyt e o r somethin g similar .
Whe n connectin g o r disconnectin g th e fue l tube/quick -
connec t fitting s assembly , b e carefu l no t t o ben d o r
twis t i t excessively . Replac e i t i f damaged .
A disconnecte d quick-connec t fittin g ca n b e reconnected ,
bu t th e retaine r o n th e matin g pip e canno t b e reuse d onc e
i t ha s bee n remove d fro m th e pipe . Replac e th e retaine r
whe n
— Replacin g th e fue l pump .
— Replacin g th e fue l fee d pipe .
— It ha s bee n remove d fro m th e pipe .
— It i s damaged .
FUEL PIP ERETAINE RFUEL TUB E
QUICK-CONNEC TFITTINGS
Disconnectio n
Do no t smok e whil e workin g o n th e fue l
system . Kee p ope n flame s awa y fro m you r wor k area .
1 . Disconnec t th e batter y negativ e cable .
2 . Remov e th e fue l fil l cap , an d reliev e fue l pressur e in
th e tank .
3 . Reliev e fue l pressur e (se e pag e 11-124 ).
4 . Chec k th e fue l quick-connec t fitting s fo r dirt , an d
clea n if necessary .
5 . Hol d th e connecto r wit h on e han d an d pres s dow n
th e retaine r tab s wit h th e othe r hand , the n pul l th e
connecto r off .
NOTE :
Be carefu l no t t o damag e th e pip e o r othe r parts .
Do no t us e tools .
If th e connecto r doe s no t move , kee p th e retaine r
tab s presse d down , an d alternatel y pul l an d pus h
th e connecto r unti l i t come s of f easily .
D o no t remov e th e retaine r fro m th e pipe ; onc e
removed , th e retaine r mus t b e replace d wit h a
ne w one .
LOCKIN G PAW L
RETAINE R TA B
PIPE
CONNECTO R
Press down .
6. Chec k th e contac t are a o f th e pip e fo r dir t an d dam -
age.
— If th e surfac e is dirty , clea n it .
— If th e surface is rust y o r damaged , replac e th e fue l
pum p o r fue l fee d pipe .
CONTAC T ARE A
CONNECTO R
RETAINER
PIPE
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Fuel Supply System

Fuel Tube/Quick-Connect Fittings (cont'd)

7. To prevent damage and keep out foreign matter,

cover the disconnected connector and pipe end with

plastic bags.

PLASTIC BAGS

NOTE:

The retainer cannot be reused once it has been

removed from the pipe.

Replace the retainer when

— replacing the fuel pump.

— replacing the fuel feed pipe.

— it has been removed from the pipe.

— it is damaged.
Connection

Do not smoke while working on the fuel

system. Keep open flames away from your work area.

1. Check the pipe contact area for dirt and damage,

and clean if necessary.

CONTACT AREA

PIPE

2.

Insert a new retainer into the connector if the retainer

is damaged, or after

— replacing the fuel pump.

— replacing the fuel feed pipe.

— removing the retainer from the pipe.

New RETAINER

(Insert into

the connector).

CONNECTOR
FUEL

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