ACURA TL 1995 Service Repair Manual

Charging Syste m
Troubleshootin g (cont'd )
NOTE: B e sur e th e batter y is sufficientl y charge d (se e pag e 23-60 ).
Alternator/Regulato r Test-1 :
1 . Connec t th e Su n VAT-4 0 (o r
equivalen t tester) , an d tur n
th e selecto r switc h t o positio n
1 (starting) .
2. Shif t t o o r position , an d
star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h n o
loa d unti l th e radiato r fa ncome s on , the n le t i t idle .
3 . Rais e th e engin e spee d t o
2,00 0 rpm , an d hol d i t there .
I s th e voltag e ove r 15. 1 V ?
I s th e voltag e les s tha n 13. 5 V ? LOA
D ADJUSTE R
(CARBON PILE )
FULL FIEL DTESTE RLEAD (BLU )
VOLTMETE RNEGATIVELEAD (BLK )
VOLTSELECTO R
FIELDSELECTO R
B TERMINA LWIRE
INDUCTIV EPICK-UP
VOLTMETE RPOSITIVELEAD (RED )
NEGATIV E TESTE RCABLE (BLK )
POSITIV E TESTE RCABLE (RED )
Replac e th e voltag e regulator .
Tes t an d repai r th e alternato r com -
ponents .
(T o page 23-99) INDUCTIV
E
PICK-UP(GRN)
TEST SELECTO RSWITCH
Alternator/Regulato r Test-2 :
1 . Releas e th e accelerato r pedal ,
an d le t th e engin e idle .
2 . Mak e sur e al l accessorie s ar e
turne d off . Tur n th e selecto r
switc h t o positio n 2 (charging) .
3 . Remov e th e inductiv e pick-up ,
an d zer o th e ammeter .
4 . Plac e th e inductiv e pick-u p
ove r th e B termina l wire of th e
alternato r s o tha t th e arro w
points awa y fro m th e alterna -tor.5. Rais e th e engin e spee d t o
2,00 0 rpm , an d hol d i t there .
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(From page 23-98)
I s th e amperag e 7 5 A or more ? The chargin g syste m is OK .
Alternator/Regulato r Test-4 :
With th e engin e spee d stil l a t2,00 0 rpm , full-fiel d th e alternator . CAUTION
: Th e voltag e wil l ris e quickl y whe n th e alternato r i s full-fielded . D o no t allo w
th e voltag e to excee d 1 8 V ; i t ma y damag e th e electrica l system .
NOTE : Attac h a prob e t o th e VAT-4 0 ful l fiel d tes t lead , an d inser t th e prob e int o th e ful l
fiel d acces s hol e a t th e bac k o f th e alternator . Switc h th e fiel d selecto r t o th e " A (Ground) "
positio n momentarily , an d chec k th e amperag e reading .
END COVE R
Is th e alternato r outpu t 7 5 A ormore ? Tes
t an d repai r th e alternato r com -ponents .
ALTERNATO R 4 P CONNECTO R
'95-96 model s '97-9 8 model s
BLK/YE L Wir e Test :
1 . Tur n th e ignitio n switc h OFF ,
the n tur n i t o n (II ) again .
2 . Disconnec t th e 4 P connecto r
from th e alternator .3. Chec k fo r voltag e a t th e No . 3 *'or No . 1*2 termina l o f th e 4 Pconnector .
I s ther e batter y voltage ? Repai
r th e ope n in th e BLK/YE L
wire .
*1:'95-9 6 model s*2: '9 7 - 9 8 model s
23-99
FULL FIEL DACCES S HOL E
REGULATO R(Located insid ethe en d cover )
WIRE SID E O F FEMAL E TERMINAL S
Replac e th e voltag e regulator .
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Charging Syste m
Alternato r Replacemen t
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 cable , the n discon -
nec t th e positiv e cable .
3 . Disconnec t th e 4 P connecto r fro m th e alternator .
4 . Remov e th e termina l nu t an d BL K wir e fro m th e B
terminal .
B TERMINA L
BLK WIR E
4P CONNECTO R
5. Loose n th e throug h bolt , the n loose n th e adjustmen t
loc k bolt , an d the n th e adjustin g nut .
ADJUSTIN G NU T
8 N- m (0. 8 kgf-m , 6 Ibf-ft )
THROUG H BOL T ADJUSTMEN T LOC K BOL T
4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft ) 2 2 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
6. Remov e th e bel t fro m th e alternator .
7 . Remov e th e adjustmen t loc k bol t an d th e throug h bolt ,
the n remov e th e alternator .
8 . Instal l i n th e revers e orde r o f removal .
9 . Adjus t th e alternato r bel t tensio n (se e pag e 23-105 ).
10 . Ente r th e anti-thef t cod e fo r th e radio , the n ente r th e
customer' s radi o statio n presets .
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Alternator Overhau l
NOTE: D o no t remov e th e pulle y unles s th e fron t bear -
in g need s replacement .
T o loose n th e pulle y locknut , us e th e tool s a s shown . I f
necessary , us e a n impac t wrench .
END COVE R
TERMINA L INSULATO R
BRUSH HOLDE RINSULATO R
BRUSH ASSEMBL Y
Inspection , pag e 23-10 2
VOLTAG E
REGULATO R
SPACER RIN G
REA R BEARIN G PULLE
Y
22 m m BO XWRENC H
10 m m BO X WRENC H
PULLEY LOCKNU T
11 1 N- m (11. 3 kgf-m , 81. 7 Ibf-ft )
RECTIFIE R ASSEMBL Y
Test , pag e 23-10 2
REAR HOUSIN G
Do no tdisassemble .
BEARING INSULATO R
STATOR THROUGH-BOL T
STATOR ASSEMBLY/DRIV E EN D HOUSIN G
Test , pag e 23-10 3
PULLE Y LOCKNU T
11 1 N- m (11. 3 kgf-m , 81. 7 Ibf-ft )
CAUTION : D o no t ge t greas e
or oi l o n th e sli p rings .
FRONT BEARIN G
PULLEY
ROTO
R
Test , pag e 23-10 3 INSULATO
R SLEEV E
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Charging System

Rectifier Test

NOTE: The diodes are designed to allow current to pass

in one direction while blocking it in the opposite direc-

tion. Since the alternator rectifier is made up of eight

diodes (four pairs), each diode must be tested for conti-

nuity in both directions with an ohmmeter that has diode

checking capability; a total of 16 checks.

1.

Check for continuity in each direction, between the

B and P, and between the E (ground) and P termi-

nals of each diode pair. All diodes should have con-

tinuity in only one direction.

2. If any of the eight diodes fails, replace the rectifier

assembly. (Diodes are not available separately.)
Alternator Brush Inspection

1. Remove the end cover, then take out the brush holder

by removing its two screws.

2. Measure the length of the brushes with a vernier

caliper.

Alternator Brush Length:

Standard: 10.5 mm (0.41 in)

Service Limit: 1.5 mm (0.06 in)

ALTERNATOR BRUSHES

VERNIER CALIPER

If the brushes are less than the service limit, replace

the alternator brush assembly.ProCarManuals.com

Rotor Slip Ring Test

1. Check the resistance between the slip rings.

There should be 1.8 - 3.0 ohms.

If resistance meets the specification, go to step 2.

If resistance does not meet the specification,

replace the alternator.

ROTOR SHAFT

SLIP RINGS

ROTOR

2. Check that there is no continuity between the slip

rings and the rotor or rotor shaft.

3. If the rotor fails either continuity check, replace the

alternator.
Stator Test

1. Check that there is continuity between each pair of

leads.

LEADS

COIL CORE

2. Check that there is no continuity between each lead

and the coil core.

3. If the coil fails either continuity check, replace the

alternator.ProCarManuals.com

Charging Syste m
Alternato r Bel t Inspectio n an d Adjustmen t
Deflection Method :
Appl y a forc e o f 9 8 N (1 0 kgf , 2 2 Ibf) , an d measur e th e
deflectio n betwee n th e alternato r an d th e crankshaf t pul -
ley.
Deflection : 9. 0 - 11. 5 m m (0.3 5 - 0.4 5 in )
NOTE : O n a brand-ne w bel t (on e tha t ha s bee n ru n fo r
les s tha n fiv e minutes) , th e deflectio n shoul d b e 5. 5 - 7. 0
m m (0.2 2 - 0.2 8 in ) whe n firs t measured . I f th e bel t i s
wor n o r damaged , replac e it .
CRANKSHAF T PULLE Y
Belt Tensio n Gaug e Method :
Followin g th e gaug e manufacturer' s instructions , attac h
th e specia l too l t o th e belt , an d measur e th e tension .
Tension : 39 0 - 54 0 N (4 0 - 5 5 kgf , 8 8 - 12 1 Ibf )
NOTE : O n a brand-ne w belt , (on e tha t ha s bee n ru n fo r
les s tha n fiv e minutes) , th e tensio n shoul d b e 83 0 -
103 0 N (8 5 - 10 5 kgf , 18 7 - 23 1 Ibf ) whe n firs t measured .
I f th e bel t i s wor n o r damaged , replac e it .
BEL T TENSIO N GAUG E07JGG-001010 A
CRANKSHAFT PULLE Y
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If adjustmen t i s necessary :
1 . Loose n th e throug h bol t an d th e adjustin g loc k bolt .
2 . Mov e th e alternato r b y turnin g th e adjustin g nu t t o
obtai n th e prope r bel t tension , the n retighte n th e
bolts .
THROUG H BOL T
4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
ADJUSTMEN T LOC K BOL T
2 2 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
To loose n bel t
ADJUSTIN G NU T8 N- m (0. 8 kgf-m , 6 Ibf-ft )
3. Rechec k th e deflectio n o r tensio n o f th e belt .
NOTE : Fo r th e powe r steerin g pum p bel t an d A/ C
compresso r bel t adjustments , refe r t o sectio n 1 7 an d
sectio n 22 .
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Fan Control s
Componen t Locatio n Inde x
RADIATO R FA N CONTRO L
MODUL E
Terminals , pag e 23-10 9
ENGIN E COOLAN T TEMPERATUR E
(ECT ) SWITC H B
Test , sectio n 1 0
Replacement , sectio n 1 0
RADIATO R FA N
Test , pag e 23-10 9
Removal , sectio n 1 0
CONDENSE R FA N
Test , pag e 23-10 9
Removal , sectio n 1 0
ENGIN E COOLAN T TEMPERATUR E
(ECT ) SWITC H A
Test , sectio n 1 0
Removal , sectio n 1 0
RADIATO R FA N RELA YWire colors : WHT ,
YEL , WHT/BLU ,
L T GRN/YE L
Test , pag e 23-6 2
Description :
Radiator Fa n Contro l Syste m
Whe n th e engin e coolan t temperatur e (ECT ) i s abov e approximatel y 207° F (97°C ) afte r th e engin e ha s stopped , th e radiato r
fan wil l ru n fo r abou t 1 5 minutes .
The engin e coolan t temperatur e (ECT ) switc h B is o n th e thermosta t cover , an d th e radiato r fa n contro l modul e is locate d
unde r th e righ t sid e o f th e dash .
CONDENSE R FA N RELA Y
Wir e colors : WHT , YEL/WH T
WHT/GRN , L T GRN/YE L
Test , pag e 23-6 2
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Fan Controls

Troubleshooting

NOTE: The numbers in the table show the troubleshooting sequence.ProCarManuals.com