1995 ACURA TL fuel pump

System Description

Vacuum Connections (cont'd)

'96 model:

LEFT PRIMARY HEATED OXYGEN SENSOR (LEFT PRIMARY

HO2S) (BANK 2 SENSOR 1)

RIGHT PRIMARY HEATED OXYGEN SENSOR (RIGHT

PRIMARY HO2S) (BANK 1 SENSOR 1)

SECONDARY HEATED OXYGEN SENSOR (SECONDARY

HO2S) (SENSOR 2)

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

INTAKE AIR TEMPERATURE (IAT) SENSOR

LEFT KNOCK SENSOR (LEFT KS) (BANK 2)

RIGHT KNOCK SENSOR (RIGHT KS) (BANK 1)

IDLE AIR CONTROL (IAC) VALVE

FAST IDLE THERMO VALVE

IDLE ADJUSTING SCREW

FUEL INJECTOR

FUEL PRESSURE REGULATOR

FUEL PRESSURE REGULATOR CONTROL SOLENOID VALVE

FUEL FILTER

FUEL PUMP (FP)

FUEL TANK

AIR CLEANER (ACL)

INTAKE AIR BYPASS (IAB) LOW CONTROL DIAPHRAGM

VALVE

INTAKE AIR BYPASS (IAB) LOW CONTROL SOLENOID

VALVE

INTAKE AIR BYPASS (IAB) HIGH CONTROL DIAPHRAGM

VALVE

INTAKE AIR BYPASS (IAB) HIGH CONTROL SOLENOID

VALVE
INTAKE AIR BYPASS (IAB) VACUUM TANK

INTAKE AIR BYPASS (IAB) CHECK VALVE

THREE WAY CATALYTIC CONVERTER (TWC)

EXHAUST GAS RECIRCULATION (EGR) VALVE AND LIFT

SENSOR

EXHAUST GAS RECIRCULATION (EGR) CONTROL

SOLENOID VALVE

EXHAUST GAS RECIRCULATION (EGR) VACUUM CONTROL

VALVE

POSITIVE CRANKCASE VENTILATION (PCV) VALVE

EVAPORATIVE EMISSION (EVAP) CONTROL CANISTER

EVAPORATIVE EMISSION (EVAP) PURGE CONTROL

DIAPHRAGM VALVE

EVAPORATIVE EMISSION (EVAP) PURGE CONTROL

SOLENOID VALVE

EVAPORATIVE EMISSION (EVAP) TWO WAY VALVE

FUEL TANK EVAPORATIVE EMISSION (EVAP) VALVE

EVAPORATIVE EMISSION (EVAP) PURGE FLOW SWITCH

WATER VALVE CONTROL SOLENOID VALVE

WATER VALVE CONTROL DIAPHRAGM

WATER VALVE CHECK VALVEProCarManuals.com

'97 - 98 models:

LEFT PRIMARY HEATED OXYGEN SENSOR (LEFT PRIMARY

HO2S) (BANK 2 SENSOR 1)

RIGHT PRIMARY HEATED OXYGEN SENSOR (RIGHT

PRIMARY HO2S) (BANK 1 SENSOR 1)

SECONDARY HEATED OXYGEN SENSOR (SECONDARY

HO2S) (SENSOR 2)

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

INTAKE AIR TEMPERATURE (IAT) SENSOR

LEFT KNOCK SENSOR (LEFT KS) (BANK 2)

RIGHT KNOCK SENSOR (RIGHT KS) (BANK 1)

IDLE AIR CONTROL (IAC) VALVE

FAST IDLE THERMO VALVE

IDLE ADJUSTING SCREW

FUEL INJECTOR

FUEL PRESSURE REGULATOR

FUEL PRESSURE REGULATOR CONTROL SOLENOID VALVE

FUEL FILTER

FUEL PUMP (FP)

FUEL TANK

AIR CLEANER (ACL)

INTAKE AIR BYPASS (IAB) LOW CONTROL DIAPHRAGM

VALVE

INTAKE AIR BYPASS (IAB) LOW CONTROL SOLENOID

VALVE

INTAKE AIR BYPASS (IAB) HIGH CONTROL DIAPHRAGM

VALVE

INTAKE AIR BYPASS (IAB) HIGH CONTROL SOLENOID

VALVE
INTAKE AIR BYPASS (IAB) VACUUM TANK

INTAKE AIR BYPASS (IAB) CHECK VALVE

THREE WAY CATALYTIC CONVERTER (TWC)

EXHAUST GAS RECIRCULATION (EGR) VALVE AND LIFT

SENSOR

EXHAUST GAS RECIRCULATION (EGR) CONTROL

SOLENOID VALVE

EXHAUST GAS RECIRCULATION (EGR) VACUUM CONTROL

VALVE

POSITIVE CRANKCASE VENTILATION (PCV) VALVE

EVAPORATIVE EMISSION (EVAP) PURGE CONTROL

SOLENOID VALVE

EVAPORATIVE EMISSION (EVAP) CONTROL CANISTER

EVAPORATIVE EMISSION (EVAP) THREE WAY VALVE

EVAPORATIVE EMISSION (EVAP) CONTROL CANISTER

VENT SHUT VALVE

EVAPORATIVE EMISSION (EVAP) TWO WAY VALVE

EVAPORATIVE EMISSION (EVAP) BYPASS SOLENOID

VALVE

FUEL TANK PRESSURE SENSOR

FUEL TANK EVAPORATIVE EMISSION (EVAP) VALVE

WATER VALVE CONTROL SOLENOID VALVE

WATER VALVE CONTROL DIAPHRAGM

WATER VALVE CHECK VALVE

FUEL PULSATION DAMPERProCarManuals.com

NOTE: Check all hose clamps and retighten if necessary.

'96 model:

To

FUEL

PRESSURE

REGULATOR
FUEL GAUGE SENDING

UNIT ASSEMBLY

FUEL

' FILTER
EVAPORATIVE EMISSION

(EVAP) TWO WAY VALVE

FUEL PUMP

ASSEMBLY

EVAPORATIVE EMISSION

(EVAP) CONTROL

CANISTER

10-15
mm

(0.39
-
0.59
in)
Clamp in the middle.

Clamp in the middle.
O-RING

Replace.

O-RING

Replace.

FUEL

TANKProCarManuals.com

Fuel Supply System

Fuel Lines (cont'd)

'97 - 98 models:

To

FUEL

PRESSURE

REGULATOR
FUEL

FILTER
FUEL GAUGE SENDING

UNIT ASSEMBLY
BASE GASKET

Replace.
FUEL PUMP

ASSEMBLY

EVAPORATIVE EMISSION

(EVAP) TWO WAY VALVE

EVAPORATIVE EMISSION

(EVAP) CONTROL

CANISTER

10- 15 mm

(0.39-0.59 in)
Clamp in the middle.

Clamp in the middle.
FUEL

TANKProCarManuals.com

14. Align the center line on the connector with the mark on the fuel rail.

15. Install and tighten the retainer nuts.

16. Connect the fuel hose to the fuel rail.

17. Connect the vacuum hose and fuel return hose to the fuel pressure regulator.

18. Install the connectors on the fuel injectors.

19. Install the engine cover.

20. Turn the ignition switch ON (ll) but do not operate the starter. After the fuel pump runs for approximately two seconds,

the fuel pressure in the fuel line rises. Repeat this two or three times, then check whether there is any fuel leakage.
FUEL

INJECTOR
MARKINGS
FUEL

RAIL
FUEL RAIL

INSULATOR
FUEL

RAILSProCarManuals.com

Troubleshooting Flowchar t
No. 1 VACUU MHOSEVACUU M
PUMP/GAUG E
A973 X - 04 1 - XXXX X
FUELPRESSUR EREGULATO R
Is ther e manifol d vacuum ?
Is ther e vacuum ?
Chec k th e Fue l Pressur e Regula -
to r Contro l Solenoi d Valve :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e 4 P connecto r
fro m th e contro l box .
3 . Connec t batter y positiv e t o
termina l No . 4 an d batter y
negativ e t o termina l No . 3 on
th e 4 P connector .
4 . Star t th e engin e an d allo w it
to idle .
Chec k th e No . 1 an d No . 3 vacu -
u m hose .
I f hose s ar e OK , replac e th e fue l
pressur e regulato r contro l sole -
noi d valve .
Inspec t fo r a shor t t o groun d in
wir e betwee n PC M (A10 ) an d th e
4P connector .If th e wir e i s OK , substitut e a
known-goo d PC M an d recheck . I f
sympto m goe s away , replac e th e
origina l PCM .
CONTRO L BO X4P CONNECTO R (C218 )
I s ther e manifol d vacuum ? Replac
e th e fue l pressur e regula -
to r contro l solenoi d valve . Termina
l sid e o f mal e
terminal s
(T o pag e 11-126 ) Disconnec
t th e 4 P connecto r
fro m th e contro l box .
Chec
k fo r vacuu m at idle :
1 . 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 radiato r fa n
come s on .
2 . Disconnec t th e No . 1 vacuu m
hos e fro m th e fue l pressur e
regulato r an d connec t a vac -
uu m gaug e to th e hose .
Inspectio
n o f Fue l Pressur e
Regulato r Contro l Solenoi d Valve .
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