ACURA TL 1995 Service Repair Manual

Replacement
Do no t smok e whil e workin g o n th e fue l
system . Kee p ope n flam e awa y fro m you r wor k area .
1 . Plac e a sho p towe l unde r th e fue l pressur e regula -
tor , the n reliev e fue l pressur e (se e pag e 11-119 ).
2 . Disconnec t th e vacuu m hos e an d fue l retur n hose .
3. Remov e th e tw o 6 m m retaine r bolts .
NOTE :
• Replac e th e O-ring .
• Whe n assemblin g th e fue l pressur e regulator ,
appl y clea n engin e oi l t o th e O-rin g an d assembl e
i t int o it s prope r position , takin g car e no t t o dam -
ag e th e O-ring .
ProCarManuals.com

Fuel Filte r
Replacemen t
• D o no t smok e whil e workin g o n fue l system .
Kee p ope n flam e awa y fro m you r wor k area .
• Whil e replacin g th e fue l filter , b e carefu l t o kee p a saf e
distanc e betwee n batter y terminal s an d an y tools .
Th e fue l filte r shoul d b e replace d wheneve r th e fue l pres -
sur e drop s belo w th e specifie d valu e [26 0 - 31 0 kP a
(2.6 5 - 3.1 5 kgf/cm
2, 37. 7 - 44. 8 psi ) wit h th e fue l pressur e
regulato r vacuu m hos e disconnecte d an d pinched ] afte r
makin g sur e tha t th e fue l pum p an d th e fue l pressur e
regulato r ar e OK .
1 . Mak e sur e yo u hav e th e anti-thef t cod e fo r th e radio ,
the n writ e dow n th e frequencie s fo r th e radio' s pre -
set buttons .
2. Disconnec t th e batter y negativ e cabl e fro m th e bat -
ter y negativ e terminal .
3 . Plac e a sho p towe l unde r an d aroun d th e fue l filter .
4 . Reliev e fue l pressur e (se e pag e 11-119 ).
5 . Remov e th e banj o bol t an d th e fue l fee d pip e whil e
supportin g th e fue l filte r wit h anothe r wrench , a s
shown .
6 . Remov e th e fue l filte r clam p an d fue l filter .
7 . Whe n assembling , us e ne w washer s a s shown .
NOTE : Clea n th e flare d join t o f hig h pressur e hose s
thoroughl y befor e reconnectin g them .
'96 model :
ProCarManuals.com

Fuel Supply System

Fuel Filter (cont'd)

'97 - 98 models:

BANJO BOLT

22 N-m (2.2 kgf-m,

16 Ibf-ft)

WASHERS

Replace.

9.8 N-m

(1.0 kgf-m,

7.2 Ibf-ft)
37 N-m

(3.8 kgf-m,

27 Ibf-ft)ProCarManuals.com

Fuel Suppl y Syste m
Fuel Pum p
Testin g
Do no t smok e durin g th e test . Kee p ope n
flam e awa y fro m you r wor k area .
I f yo u suspec t a proble m wit h th e fue l pump , chec k tha t
th e fue l pum p actuall y runs ; whe n it i s ON , yo u wil l hea r
som e nois e i f yo u hol d you r ea r t o th e fue l fil l por t wit h
th e fue l fil l ca p removed . Th e fue l pum p shoul d ru n fo r
tw o second s whe n ignitio n switc h i s firs t turne d on . I f
th e fue l pum p doe s no t mak e noise , chec k a s follows :
1 . Remov e th e trun k floor .
2 . Disconnec t th e 3 P connector .
CAUTION : B e sur e t o tur n th e ignitio n switc h OF F
befor e disconnectin g th e wires .
3 . Disconnec t th e PGM-F I mai n rela y connecto r an d
connec t th e No . 2 termina l an d No . 5 terminal * wit h
a jumpe r wire . * : 8 P connecto r
4.
PGM-F I MAI N RELA Y CONNECTOR S
8P (C417 )
JUMPE R WIR E
Wire sid e o f femal e terminal s
Check tha t batter y voltag e i s availabl e betwee n th e
fue l uni t sub-harnes s connecto r termina l No . 3 an d
bod y groun d whe n th e ignitio n switc h is turne d O N (II) .
FUE L UNI T SUB-HARNES SCONNECTOR (C519 )
Termina l sid e o f mal e terminal s
If batter y voltag e is available , chec k th e fue l pum p
ground . I f th e groun d i s OK , replac e th e fue l
pump .
I f ther e is n o voltage , chec k th e wir e harnes s (se e
pag e 11-130 ).
4 P (C418 )
ProCarManuals.com

PGM-FI Main Relay

Description

This PGM-FI main relay is located at the left side of the

cowl. The PGM-FI main relay actually contains two indi-

vidual relays. One relay is energized whenever the igni-

tion is on. It supplies battery voltage to the PCM, power

to the fuel injectors, and power for the second relay. The

second relay is energized for two seconds when the

ignition is switched on, and when the engine is running.

It supplies power to the fuel pump.

PGM-FI

MAIN RELAY

FUEL PUMP
Relay Testing

NOTE: If the car starts and continues to run, the PGM-FI

main relay is OK.

Remove the PGM-FI main relay.

Attach the battery positive terminal to the No. 3*

terminal and the battery negative terminal to the

No. 2* terminal of the PGM-FI main relay. Then

check for continuity between the No. 5* terminal and

No. 2 terminal of the PGM-FI main relay.

If there is continuity, go on to step 3.

If there is no continuity, replace the relay and

retest.

No. 4
*: 8P CONNECTOR

3. Attach the battery positive terminal to the No. 4 ter-

minal and the battery negative terminal to the No.

7* terminal of the PGM-FI main relay. Then check

that there is continuity between the No. 3 terminal

and No. 1 terminal of the PGM-FI main relay.

• If there is continuity, go on to step 4,

• If there is no continuity, replace the relay and

retest.

4. Attach the battery positive terminal to the No. 1 ter-

minal and battery negative terminal to the No. 2*

terminal of the PGM-FI main relay. Then check that

there is continuity between the No. 5* terminal and

No. 2 terminal of the PGM-FI main relay.

If there is continuity, the relay is OK;

If the fuel pump still does not work, go to

Harness Testing on the next page.

If there is no continuity, replace the relay and

retest.ProCarManuals.com

Fuel Suppl y Syste m
PGM-F I Mai n Rela y (cont'd )
Troubleshootin g Flowchar t
Engine wil l no t start .Inspectio n o f PGM-F I mai nrelay an d rela y harness .
Check fo r a n ope n in th e wir e (PG 1line) :1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PGM-F I mai n
rela y 4 P connecto r an d 8 P
connector .3. Chec k fo r continuit y betwee n
th e PGM-F I mai n rela y 8 P
connecto r termina l No . 7 an d
bod y ground . PGM-F
I MAI N RELA Y 8P CONNECTO R (C417 )
Wir e sid e o f femal e terminal s
I s ther e continuity ? Repai
r ope n in th e wir e betwee n
th e PGM-F I mai n rela y an d G10 1
(locate d a t righ t middl e o f
engine) .
Check fo r a n ope n o r shor t i n th e
wir e (BA T line) :
Measur e voltag e betwee n th e
PGM-F I mai n rela y 4 P connecto r
termina l No . 3 an d bod y ground . PGM-F
I MAI N RELA Y 4P CONNECTO R (C418 )
BAT(YEL /BLU)
Wire sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e EC U (PCM )
(2 0 A ) fuse .
Replac e th e EC U (PCM ) (2 0 A )
fus e in th e under-hoo d fuse /
relay box .
Chec k fo r a n ope n o r shor t i n th e
wir e (IGS W line) :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Measur e voltag e betwee n th e
PGM-F I mai n rela y 8 P connec -
to r termina l No . 5 an d bod y
ground .
Is ther e batter y voltage ?
(T o pag e 11-131 ) Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 2 FUE L
PUM P (1 5 A ) fuse .
Replac e th e No . 2 FUE L PUM P
(15 A ) fus e i n th e under-das hfuse/relay box .
ProCarManuals.com

(From pag e 11-130 )
Chec k fo r a n ope n i n th e wir e
(IGS W line) :
Measur e voltag e betwee n th e
PGM-F I mai n rela y 4 P connecto r
termina l No . 4 an d bod y ground . PGM-F
I MAI N RELA Y 4 P CONNECTO R (C418 )
I s ther e batter y voltage ? Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e I G COI L
(3 0 A ) fuse .
Replac e th e IG 1 1 G COI L (3 0
A ) fus e i n th e ignitio n coi l
fus e holder . Wir
e sid e o f femal e terminal s
Chec k fo r a n ope n o r shor t i n th e
wir e (ST S line) :
1 . Tur n th e ignitio n switc h t o th e
STAR T (III ) positio n (Trans -
missio n i n [N ] o r [P] position) .
2 . Measur e th e voltag e betwee n
th e PGM-F I mai n rela y 8 P con -
necto r termina l No . 3 an d
body ground .
PGM-FI MAI N RELA Y 8 P CONNECTO R (C417 )
I s ther e batter y voltage ? Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 9
STARTE R SIGNA L (7. 5 A ) fuse .
Replac e th e No . 9 STARTE R
SIGNA L (7. 5 A ) fus e i n th e
under-das h fuse/rela y box . Wir
e sid e o f femal e terminal s
Chec k fo r a n ope n i n th e wir e
(FLR 1 line) :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e PC M connec -tor A (2 6 P ) fro m th e PCM .3. Chec k fo r continuit y betwee n
th e PGM-F I mai n rela y 8 P
connecto r termina l No . 2 an d
PC M connecto r termina l A4 .
I s ther e continuity ?
(T o pag e 11-132 ) Repai
r ope n in th e wir e betwee n
th e PC M (A4 ) an d th e PGM-F I
mai n relay . PC
M CONNECTO R A (26P )
Wir e sid e o f femal e terminal s
ProCarManuals.com

Fuel Suppl y Syste m
PGM-F I Mai n Rela y (cont'd )
(From pag e 11-131 )
Chec k fo r a n ope n i n th e wire s
(IGP1 , IGP 2 lines) :
1 . Reconnec t th e PC M connecto r
A (26P) .2. Reconnec t th e PGM-F I mai n
rela y 4 P an d 8 P connectors .
3. Tur n th e ignitio n switc h O N (II) .4. Measur e voltag e betwee n
PC M connecto r terminal s A1 3
an d A12 , an d betwee n termi -
nal s B 1 an d A12 . PC
M CONNECTOR S
Wir e sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n i n th e wir e
betwee n th e PC M (A13 , B1 )
an d th e PGM-F I mai n relay .
Replac e th e PGM-F I mai n
relay.
Chec k fo r a n ope n in th e PCM :1. Tur n th e ignitio n switc h OFF .2. Measur e voltag e betwee n
PC M connecto r terminal s A 4
an d A1 2 whe n th e ignitio nswitch i s firs t turne d O N (II )for tw o seconds .
I s ther e 1. 0 V or less ? Substitut
e a known-goo d PC M
an d recheck . I f prescribe d volt -
ag e is no w available , replac e th e
origina l PCM .
Chec k th e PGM-F I mai n rela y
(se e pag e 11-129 ).
ProCarManuals.com

Intake Air System

System Description

The system supplies air for all engine needs. It consists of the intake air pipe, Air Cleaner (ACL), intake air duct, Throttle

Body (TB), Idle Air Control (IAC) Valve, fast idle thermo valve, and intake manifold.

A resonator in the intake air pipe provides additional silencing as air is drawn into the system.

IAB LOW

CONTROL

SOLENOID

VALVE
IAB HIGH

CONTROL SOLENOID VALVE

IAB LOW

CONTROL

DIAPHRAGM

VALVE
From PGM-FI

MAIN RELAY

From No. 4 ECU

(PCM)
(15 A)

FUSE

(in the under-dash

fuse/relay box)

VARIOUS

SENSORS

INTAKE

AIR

DUCT

FAST

IDLE

THERMO

VALVE
IDLE

ADJUSTING

SCREW
ENGINE

COOLANT
INTAKE

MANIFOLD
PCM
IAB

VACUUM

TANK
IAB

CHECK

VALVE

IAB HIGH

CONTROL

DIAPHRAGM

VALVEProCarManuals.com

Intake Ai r Syste m
Air Cleane r (ACL )
ACL Elemen t Replacemen t
ACL HOUSIN GCOVER
ACL ELEMEN T
Norma l conditions :
Replac e ai r cleane r elemen t ever y
30,00 0 mile s (48,00 0 km ) o r 2 4
month s whicheve r come s first .
Sever e conditions :
Clea n ai r cleane r elemen t ever y
15,00 0 mile s (24,00 0 km ) o r 1 2
month s an d replace every 30,00 0
mile s (48,00 0 km ) o r 2 4 month s
whicheve r come s first .
ACL HOUSIN G
ProCarManuals.com