bulb ACURA TL 1995 Service User Guide

Pump motor control:

The ABS control unit monitors the brake fluid pressure in the accumulator by the pressure switch ON/OFF signals. The

ABS control unit turns the pump on when the pressure in the accumulator drops, and stops the pump when the pressure

rises to the specified value.

If the pressure does not reach the specified value after the motor has operated continuously for a specified period, the

ABS control unit stops the motor and activates the ABS indicator light.

Self-diagnosis function:

The self-diagnosis function, provided in the sub-function of the ABS control unit, monitors the main system functions by

constantly transmitting the data between the two Central Processing Units (CPUs). When an abnormality is detected, the

ABS control unit turns the ABS indicator light on and stops the ABS, although the basic brake system continues to operate

normally.

When the ABS control unit detects an abnormality with the ABS and turns the ABS indicator light on, the diagnostic trou-

ble code (DTC), which shows the problem part or unit, is recorded in the control unit. The DTC can be read by the blinking

frequency of the ABS indicator light.

Fail-safe function:

When an abnormality is detected in the ABS control sys-

tem self-diagnosis, the solenoid operations are suspend-

ed by turning off the two fail-safe relays. This discon-

nects the ground circuits of all the solenoid valves to

prevent ABS operation.

Under these conditions, the braking system functions

just as an ordinary one.

Fail-safe relay:

The fail-safe relay's terminal side contact is normally

open. When there is continuity at the relay coil, the fail-

safe relay is closed, thereby connecting the ground cir-

cuit to the solenoid valve.

ABS indicator light:
SOLENOID VALVE

BAT

REAR FAIL-SAFE RELAY

FRONT FAIL-SAFE RELAY

The ABS control unit turns the ABS indicator light on when one or more of the following abnormalities are detected. This

is only a partial list.

When the operating time of the motor in the power unit exceeds the specified period.

When vehicle running time exceeds 30 seconds without releasing the parking brake.

When absence of speed signals from any of the four wheel sensor is detected.

When the activation time of all solenoids exceeds a given time, or an open circuit is detected in the solenoid system.

When solenoid output is not detected in the simulated ABS operation when the engine is started or the vehicle is driven.

To check the indicator light bulb, the light is activated when the ignition switch is first turned on. The light goes off after

the engine is started if there is no abnormality in the system.
ABS CONTROL UNITProCarManuals.com

DTC Indication Pattern (When the ABS control unit detected a problem three times.):

Turn the ignition switch ON (II). The ABS indicator light comes on for two seconds to check the bulb.

The ABS control unit indicates the DTC three times.

If you miscount the blinking frequency or if you recheck the blinking frequency, turn the ignition switch OFF then

turn it ON (II) to cycle the ABS indicator light again.

4. Remove the SCS service connector.

NOTE: The Malfunction Indicator Lamp (MIL) will stay on after the engine is started if the SCS service connector is

connected.

5. Remove the ABS B2 (15 A) fuse in the under-hood ABS fuse/relay box for at least three seconds to erase the ABS con-

trol unit's memory.ProCarManuals.com

Diagnostic Troubl e Cod e (DTC )
Diagnosti c Troubl e Cod e (DTC ) Indicatio n (SC S Mode )
NOTE: Thi s operatio n ca n als o b e don e wit h th e Hond a PG M Tester .
1 . Connec t th e SC S servic e connecto r t o th e servic e chec k connecto r (2P ) unde r th e glov e box .
2 . Tur n th e ignitio n switc h O N (II ) withou t brak e peda l depressed .
NOTE : I f th e brak e peda l i s depresse d whe n turnin g th e ignitio n switc h O N (II) , th e syste m shift s t o ME S mode .
3 . Th e blinkin g frequenc y indicate s th e DTC .
NOTE : I f th e DT C is no t memorized , th e AB S indicato r ligh t goe s of f fo r 3. 6 second s an d the n stay s on .
4 . Tur n th e ignitio n switc h OFF , an d remov e th e SC S servic e connector .
NOTE : Th e Malfunctio n Indicato r Lam p (MIL ) wil l sta y o n afte r th e engin e i s starte d i f th e SC S servic e connecto r i s
connected .
Condition s fo r DT C indicatio n
Vehicl e spee d is a t 6 mp h (1 0 km/h ) o r less .
Th e SC S servic e connecto r i s connecte d befor e th e ignitio n switc h i s turne d O N (II) .
Th e brak e peda l i s released .
SCS SERVIC E CONNECTO R07PAZ - 001010 0
SERVIC E CHEC KCONNECTO R (2P )
ABS INDICATO R LIGH T
When ignitio n switc h i s turne d O N (II) , th e AB S indicato r ligh t come s o n fo r tw o second s t o chec k th e bulb . D o no t
coun t thi s a s a DTC .
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Climate Contro l Uni t
Replacemen t
Bulb Replacemen t
1. Remov e th e dashboar d cente r pane l togethe r wit h
th e climat e contro l unit , the n disconnec t th e con -
nectors .
CAUTION :
B e carefu l no t t o damag e th e dashboar d cente r
pane l an d th e dashboard .
D o no t pul l betwee n th e clips : Otherwise , th e
pane l ma y break .
DASHBOAR D CENTE R PANE L
2. Remov e th e fou r self-tappin g screw s an d th e cli -
mat e contro l unit .
CLIMAT E CONTRO L UNI T
3. Instal l i n th e revers e orde r o f removal . CAUTION
:
Befor e replacin g bulbs , discharg e th e stati c electricit y
(whic h accumulate d o n yo u whe n yo u remove d th e
climat e contro l unit ) b y touchin g th e doo r strike r o r
othe r meta l part s o f th e body .
D o no t touc h th e electroni c component s o n th e
printe d circui t boar d in th e climat e contro l unit .
1 . Remov e th e climat e contro l uni t (se e previou s col -
umn) .
2. Carefull y remov e th e fou r self-tappin g screw s an d
th e rea r cover .
REAR COVE R
3. Remov e th e bulb(s ) wit h a flat-ti p screwdriver .
4 . Instal l i n th e revers e orde r o f removal . Mak e not e o f
th e followin g items .
NOTE:
Do no t kin k o r pul l o n th e wire s betwee n th e con -
tro l uni t an d printe d circui t board .
Afte r installation , operat e th e climat e contro l uni t
t o se e whethe r i t work s properly .
Ru n th e self-diagnosi s functio n t o confir m tha t
ther e ar e n o problem s i n th e system .
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Charging Syste m
Troubleshootin g
If th e chargin g syste m ligh t i s on , o r th e batter y is dea d o r low , tes t th e followin g item s in th e orde r liste d below .
1. Batter y (se e pag e 23-60 )
2. Chargin g Syste m Ligh t
3. Alternator/Regulato r
Check th e No . 4 (1 5 A)*1 o r (2 0A)*2 fus e i n th e under-das h fuse /
rela y box .
I s th e fus e OK ?
Chec k fo r a n ope n in th e L circuit :
1 . Disconnec t th e 4 P connecto r
from th e alternator .2. Groun d th e No . 4*1 o r No . 3*2
termina l o f th e 4 P connector .3. Tur n th e ignitio n switc h O N(II).
Doe s th e chargin g syste mlight com e on ?
4. Disconnec t th e No . 4*1 o r No .
3*2 termina l o f th e 4 P connec -tor fro m th e ground .
Does th e chargin g syste m
ligh t g o off ?
Doe s th e chargin g syste m
ligh t sta y off ?
(T o page 23-97) Replac
e th e fuse .
Chec k fo r a blow n chargin g sys -
te m ligh t bulb . I f th e bul b i s OK ,
repai r th e ope n i n th e WHT/BL U
wire .
Th e chargin g syste m ligh t circui tis OK .
Turn th e ignitio n switc h OFF , an d
repai r th e shor t t o groun d i n th e
WHT/BL U wire .
ALTERNATO R 4 P CONNECTO R
'95 - 9 6 model s '9 7 - 9 8 model s
*1 : '9 5 -9 6 model s
*2 : '9 7 - 9 8 model s WIR
E SID E O F FEMAL E TERMINAL S
ALTERNATO R 4 P CONNECTO R
'95 - 9 6 model s '9 7 - 9 8 model s
WIR E SID E O F FEMAL E TERMINAL S
Chec
k fo r a shor t t o bod y groun d
i n th e L circuit :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e AB S contro l uni t
(C447)*1 an d integrate d contro l
uni t (C401) , a s applicable .
3. Tur n th e ignitio n switc h O N(II) .
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Gauge Assembl y
Componen t Locatio n Inde x
FUEL GAUG E SENDIN G UNI T
Test , pag e 23-12 1
VEHICLE SPEE D SENSO R (VSS )
Troubleshooting , pag e 23-11 7
Replacement , pag e 23-12 0
PARKIN G BRAK E SWITC H
Test , pag e 23-12 5
ENGINE OI L PRESSUR E SWITC H
Test , pag e 23-12 0 ENGIN
E COOLAN T TEMPERATUR E (ECT )
GAUG E SENDIN G UNI TTest , pag e 23-12 4
BRAK
E FLUI D LEVE L SWITC H
Test , pag e 23-12 5
GAUG
E ASSEMBL Y
Gauge/Termina l Location s Index , pag e 23-11 1
Removal , pag e 23-11 4
Bulb Locations , pag e 23-11 5Disassembly , pag e 23-11 6
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Bulb Locations

GAUGE LIGHTS

(1.4
W x 2)

HIGH BEAM INDICATOR LIGHT (1.4 W)

SEAT BELT REMINDER LIGHT (1.4 W)

RIGHT TURN SIGNAL INDICATOR LIGHT (1.4 W)

MALFUNCTION INDICATOR LAMP

(MIL) (1.4
W)

LOW FUEL

INDICATOR LIGHT (3 W)
BRAKE SYSTEM LIGHT (1.4 W)

LEFT TURN SIGNAL INDICATOR LIGHT (1.4 W)

SRS INDICATOR LIGHT (1.4 W)

(On the SRS printed circuit board)

CHARGING SYSTEM LIGHT (1.4 W)

LOW ENGINE OIL PRESSURE

INDICATOR LIGHT (1.4 W)

ABS INDICATOR LIGHT (1.4 W)

DRL INDICATOR

LIGHT (1.4 W) (Canada)

CRUISE LIGHT (2 W)

A/T GEAR POSITION INDICATOR LIGHTS (1.12 W x 7)
GAUGE LIGHTS

(3.4
W x 2)
SAFETY

INDICATOR

LIGHTS

(1.12
W x 6)
GAUGE LIGHTS

(3.4
W x 3)ProCarManuals.com

Low Fue l Indicato r Syste m
Indicato r Ligh t Tes t
1. Chec k th e No . 1 (1 0 A ) fus e i n th e under-das h fuse /
rela y bo x befor e testing .
2 . Par k th e ca r o n leve l ground .
D o 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 th e wor k
area . Drai n fue l onl y int o a n approve d container .
3 . Drai n th e fue l int o a n approve d container . The n
instal l th e drai n bol t wit h a ne w washer .
4. Ad d les s tha n 8. 5 (2. 2 U.S.Gal , 1. 8 Imp . Gal ) o f fuel ,
and tur n th e ignitio n switc h O N (II) . Th e low fuel
indicato r ligh t shoul d com e o n withi n fou r minutes .
LOW FUE L INDICATO R LIGH T
If th e ligh t come s o n withi n fou r minutes , g o t o
ste p 7 .
I f th e ligh t doe s no t com e o n withi n fou r min -
utes , g o t o ste p 5 .
5.
6.
Remov e th e fue l tan k acces s pane l fro m th e floor ,
an d disconnec t th e 3 P connecto r fro m th e fue l
gaug e sendin g unit .
Connec t th e No . 1 an d No . 3 terminal s wit h a
jumpe r wire .
If th e ligh t come s on , chec k th e sendin g unit .
If th e ligh t doe s no t com e on , chec k for :
— an ope n i n th e L T GRN/RE D wir e betwee n th e
fue l uni t an d fue l gaug e assembly .
— blow n bulb .
— poo r groun d (G701) .
ACCESS PANE L
©
3P CONNECTO R
7.
L T GRN/RE D
WIR E SID E O F FEMAL E TERMINAL S
Add 4 o f fue l (1. 1 U.S . Gal , 0. 9 Imp.Gal) . Th e ligh t
shoul d g o of f withi n fou r minutes .
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Safety Indicato r
Componen t Locatio n Inde x
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 .
SAFETY INDICATO R
Troubleshooting , pag e 23-13 8
Inpu t Test , pag e 23-13 9
Bul b Replacement , pag e 23-13 8
CEILIN G LIGH T
Test/Replacement , pag e 23-17 8
FRON T PASSENGER' S DOO R SWITC H
Test , pag e 23-18 0
RIGH T REA R DOO R SWITC H
Test , pag e 23-18 0
BRAK E SWITC H
Test , pag e 23-18 4
Peda l Heigh t Adjustment ,
sectio n 1 9 HIG
H MOUN T BRAK E LIGH T
Bul b Replacement , pag e 23-18 4
TRUN K LIGH T
Test , pag e 23-18 1
DRIVER' S DOO R SWITC H
Test , pag e 23-18 0
LEFT REA R DOO R SWITC H
Test , pag e 23-18 0 TRUN
K LATC H SWITC H
Test/Replacement , pag e 23-18 1
BRAKE LIGH TFAILUR E SENSO R
Test , pag e 23-14 1
Descriptio n
Safety Indicato r System :
Bulb s ar e use d to indicat e whe n th e trun k li d o r a doo r i s no t full y closed , o r whe n a brak e ligh t i s faulty . Th e bulb s wil l remai n
O N fo r abou t tw o second s afte r th e ignitio n switc h ha s bee n turne d O N (II ) t o sho w tha t th e syste m circui t i s functioning .
Brak e Ligh t Bul b Failur e Indicator :
I f al l brak e ligh t bulb s ar e OK , th e indicato r ligh t stay s of f becaus e th e WHT/GR N wir e i s constantl y bein g grounde d b y th e
brak e ligh t failur e sensor . Wit h th e brak e ligh t off , th e ground is provide d throug h th e diode , th e failur e senso r rela y coil , an d
the bul b filaments . Wit h th e brak e ligh t on , bot h relay s in th e sensor , connecte d in series , suppl y ground . I f eithe r o f th e tw o
bulb s is no t working , th e chai n is broke n an d th e WHT/GR N wir e is no t bein g grounded . Th e indicato r ligh t come s on .
SPOTLIGH T
Test/Replacement ,
pag e 23-17 7
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Safety Indicato r
Troubleshootin g
NOTE:
The number s i n th e tabl e sho w th e troubleshootin g sequence .
Mak e sur e tha t th e ceilin g ligh t bul b an d th e trun k indicato r ligh t bul b ar e no t blown .
Bulb Replacemen t
1. Remov e th e gaug e assembl y (se e pag e 23-114 ).
2 . Remov e th e bulb .
3 . Instal l i n th e revers e orde r o f removal .
GAUGE ASSEMBL YBULB (1.1 2 W )
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