1996 ACURA RL KA9 charging

Charging Syste m
Componen t Locatio n Inde x
ALTERNATO R BEL TInspectio n an d Adjustment , pag e 4-3 3
ALTERNATO RAlternator an d Regulato r Test , pag e 4-2 7
Replacement , pag e 4-2 9
Overhaul , pag e 4-3 0
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Charging Syste m
Troubleshootin g (cont'd )
(From page 4-25)
Chec k fo r a n ope n in th e IG circuit :
Measur e th e voltag e a t th e No . 1
termina l o f th e 4 P connector .
I s ther e batter y voltage ?
Chec k th e Alternator/Regulator :
1. Tur n th e ignitio n switc h OFF .2. Connec t th e 4 P connecto r t o
th e alternator .
3. Tur n th e ignitio n switc h O N(II).
Doe s th e chargin g syste mlight com e on ?
4. Star t th e engine .
Doe s th e chargin g syste m
ligh t g o off ?
Th e chargin g syste m ligh t circui t
is OK .
Turn th e ignitio n switc h OFF , an drepai r th e ope n circui t i n th e BLK /YEL wire .
ALTERNATO R4P CONNECTO R
Wir e sid e o f
femal e terminal s
Check th e alternator/regulato r
(se e pag e 4-27 ).
Chec k th e alternator/regulato r
(se e pag e 4-27 ).
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Charging Syste m
Troubleshootin g (cont'd )
(From page 4-27)
I s th e amperag e 7 5 A or more ?
The chargin g syste m is OK .
Wit h 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 .
REGULATO R(Located insid e
th e en d cover )
FULL FIEL DACCES S HOL E
END COVE R
Is th e alternato r outpu t 7 5 A ormore ?Test an d repai r th e alternato r com -ponents .
ALTERNATO R4P CONNECTO R
Tes t th e BLK/YE L Wire :
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
fro m th e alternator .
3. Measur e voltag e betwee n bod ygroun d an d alternato r 4 P con -
necto r terminal s No . 1 an d
No. 2 individually .
Is ther e batter y voltage ?
Repair th e ope n in th e wire . Wir
e sid e o ffemal e terminal s
Replace th e voltag e regulator .
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Charging Syste m
Alternato r 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 .
HARNES S
CLI P
BRACKE T
PULLEY
END COVE R
BRUS H HOLDE R
INSULATO R
BRUSH ASSEMBL Y
Inspection, pag e 4-3 1
22 m m BO XWRENC H
10 m m BO X WRENC H
PULLE Y LOCKNU T
11 0 N- m (11. 3 kgf-m , 81. 7 Ibf-ft )
VOLTAG E REGULATO R
RECTIFIE R ASSEMBL Y
Test, pag e 4-3 1
TERMINA L INSULATO R
INSULATOR SLEEV E
REA R HOUSIN G
SPACER
CAUTION : D o no t ge t greas eor oi l o n th e sli p rings .
ROTO RTest, pag e 4-3 2 PULLE
Y LOCKNU T
110 N- m(11. 3 kgf-m , 81. 7 Ibf-ft )
STATO R THROUG H BOL T
STATOR/DRIV E EN D HOUSIN G
Test , pag e 4-3 2
PULLE Y
FRONT BEARIN G
BEARIN
G RETAINE R
Do no t disassemble .
REAR BEARIN G
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Charging System

Rotor Slip Ring Test

1. Check the resistance between the slip rings.

There should be 2.9 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

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Charging Syste m
Alternato r Bel t Inspectio n an d
Adjustmen t (cont'd )
If adjustmen t i s necessary :
1 . Loose n th e mountin g bol t an d th e loc k bolt .
2 . Mov e th e alternato r b y turnin g th e adjustin g ro d t o
obtai n th e prope r bel t tension , the n retighte n th e
bolts .
Loose rTighte r
ADJUSTIN G
ROD
MOUNTIN G BOL T10 x 1.2 5 mm44 N- m (4. 5 kgf-m ,33 Ibf-ft )
LOCK BOL T8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,16 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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PGM-FI Syste m
System Descriptio n
INPUTSPOWERTRAI N CONTRO L MODUL E (PCM )OUTPUT S
CKP/CYP Senso r
Cruise
Control
Signal ('04)MA P Senso rECT Senso rIAT Senso rTP Senso rEGR Valv e Positio n Senso rLeft Primar y HO2 SRight Primar y HO2 SSecondar y HO2 SVSSBAR O Senso rLeft Knoc k Senso rRight Knoc k Senso rTCS Signals *VSA Signals*1
Spar k Plu g Voltag e Detectio nModule Signa lStarte r Signa lALT F R Signa lAir Conditionin g Signa lTransmissio n Rang e Switc h Signa lBattery Voltag e (IGN.1 )Brake Peda l Positio n Switc h Signa lPSP Switc h Signa lImmobilize r Signa lFTP Senso rCountershaf t Spee d Senso rMainshaf t Spee d Senso r
Idle Ai r Injecto r Timin g an d Duratio n
Other Contro l Function s
Ignition Timin g Contro l
PCM Back-u p Function s
InjectorsPGM-FI Mai n Rela y (Fue l Pump )Fuel Pum p Rela yMILD4 Indicato r Ligh tIAC Valv eA/C Compresso r Clutc h Rela yICMEVA P Caniste r Purg e Valv eLeft Primar y HO2 S Heate rRight Primar y HO2 S Heate rSecondar y HO2 S Heate rEGR Valv e Vacuu m Contro l Valv ePressur e Regulato r Vacuu mControl Solenoi d Valv eIMRC Solenoi d Valv e 1IMR C Solenoi d Valv e 2DL CTorqu e Converte r Clutc h Solenoi dValveShift Solenoi d Valv eA/T Clutc h Pressur e Contro lSolenoid Valv eEVAP Bypas s Solenoi d Valv eEVAP Caniste r Ven t Shu t Valv eEngin e Moun t Contro l Solenoi dValve
PGM-F I Syste m
Th e PGM-F I syste m o n thi s mode l i s a sequentia l multipor t fue l injectio n system .
Injecto r Timin g an d Duratio n
Th e PC M contain s memorie s fo r th e basi c discharg e duration s a t variou s engin e speed s an d manifol d pressures . Th e
basi c discharg e duration , afte r bein g rea d ou t fro m th e memory , i s furthe r modifie d b y signal s sen t fro m variou s sensor s
t o obtai n th e fina l discharg e duration .
Idl e Ai r Contro l
Idl e Ai r Contro l Valv e (IA C Valve )
Whe n th e engin e i s cold , th e A/ C compresso r i s on , th e transmissio n i s i n gear , th e brak e peda l i s depressed , th e powe r
steerin g loa d i s high , o r th e alternato r i s charging , th e PC M control s curren t t o th e IA C Valv e t o maintai n th e correc t idl e
speed .
Ignition Timin g Contro l
• Th e PC M contain s memorie s fo r basi c ignitio n timin g a t variou s engin e speed s an d manifol d ai r flo w rates . Ignitio n
timin g i s als o adjuste d fo r engin e coolan t temperature .
• A knoc k contro l syste m is als o used . Whe n detonatio n i s detecte d b y a knoc k sensor , th e ignitio n timin g is retarded .
Othe r Contro l Function s
1 . Startin g Contro l
Whe n th e engin e is started , th e PC M provide s a ric h mixtur e b y increasin g injecto r duration .
2 . Fue l Pum p Contro l
• Whe n th e ignitio n switc h i s initiall y turne d on , th e PC M supplie s groun d t o th e PGM-F I mai n rela y tha t supplie s cur -
ren t t o th e fue l pum p fo r 2 second s t o pressuriz e th e fue l system .
• Whe n th e engin e is running , th e PC M supplie s groun d to th e PGM-F I mai n rela y tha t supplie s current to th e fue l pump .
• Whe n th e engin e is no t runnin g an d th e ignitio n i s on , th e PC M cut s groun d t o th e PGM-F I mai n rela y whic h cut s
curren t t o th e fue l pump .
*: wit h TC S*1: wit h VS A
Idle Ai r Contro l
Coolant Temperature Gauge ('04)
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Idle Contro l Syste m
Alternato r (ALT ) F R Signa l
PCM CONNECTOR S
Is ther e abou t 5 V ?
YE S
Chec k th e operatio n o f th e ALT :
1 . Tur n th e ignitio n switc h OFF .
2 . Reconnec t th e AL T GR N 4 P
connecto r t o th e ALT .
3 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h n o
loa d (i n Par k o r neutral ) unti l
th e radiato r fa n come s on ,
then le t i t idle .4. Measur e voltag e betwee n PC M
connecto r terminal s D 5 an d A26 .
Doe s th e voltag e decreas e whe n
headlight s an d rea r defogge r ar e
turne d on ?
NO
Chec k fo r a n ope n in th e wir e (AL T
F line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e negativ e bat -
ter y cabl e fro m th e battery .
3 . Disconnec t th e PC M connec -
tor D (22P) .4. Disconnec t th e GR N 4 P con -
necto r fro m th e ALT .
5 . Connec t th e AL T 4 P connecto r
termina l No . 4 to bod y groun d
wit h a jumpe r wire .
6 . Chec k fo r continuit y betwee n
body groun d an d PC M con -necto r termina l D5 .
I s ther e continuity ?
YES
See th e AL T inspectio n
(see sectio n 4 ).
N O
Wir e sid e o f femal e terminal s
Chec k fo r a shor t i n th e wir e (AL T
F line) :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e negativ e bat -
ter y cabl e fro m th e battery .
3 . Disconnec t th e PC M connecto r
D (22P) .4. Chec k fo r continuit y betwee n
bod y groun d an d PC M con -
necto r termina l D5 .
I s ther e continuity ? Repai
r shor t i n th e wir e betwee n
the PC M (D5 ) and th e ALT .
NO
Substitut e a known-goo d PC Mand rechec k (se e pag e 11-4 1 fo rimmobilize r information) . I f pre -
scribe d voltag e is no w available ,
replac e th e origina l PCM .
AL T F R signa l i s OK .
ALT GR N 4 P CONNECTO R (C131 )
Repair ope n wir e betwee n th ePCM (D5 ) and th e ALT .
PCM CONNECTO R D (22P )
Wir e sid e o f femal e terminal s
NO
Wir e sid e o f femal e terminal s
YES YE
S
This signal s th e PC M whe n th e Alternato r (ALT ) i s charging .
Inspection o f AL T F R Signal .
Chec k fo r a shor t i n th e wir e (AL T
F line) :
1 . Disconnec t th e GR N 4 P con -
necto r fro m th e ALT .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e voltag e betwee n PC M
connecto r terminal s D 5 an d A26 .
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