1995 ACURA TL Service Repair Manual

Troubleshooting Procedure s
(cont'd)
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 in th e
SR S (sectio n 24 ) befor e performin g repair s o r service .
1. Remov e th e glov e bo x fro m th e dashboard .
CLIP
GLOV E BO X
5. 0 m m BOLT S
2.Remov e th e AB S contro l uni t mountin g bolts , an d
tur n th e AB S contro l uni t over . Disconnec t th e radi -
ato r fa n time r contro l uni t connecter .
NOTE: D o no t disconnec t th e connector s fro m th e
AB S contro l unit .
ABS CONTRO LUNIT
RADIATO R FA N
CONTRO L
MODULE CONNECTO R
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
3. Remov e th e contro l uni t bracket , the n remov e th e
TCM .
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
WIR E HARNES S
CONNECTO R
STUD BOL T
CONTRO L UNI TBRACKE T
TCMFLANG ENUT9.8 N- m (1. 0 kgf-m ,
7. 2 Ibf-ft )
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4. Inspec t th e circui t o n th e TC M accordin g t o th e trou -
bleshootin g flowchar t wit h th e specia l tool s an d a
digita l multimete r a s shown .
How to us e th e Backprob e Se t
Connec t th e backprob e adapter s t o th e stackin g patc h
cords , an d connec t th e cord s t o a multimeter . Usin g
th e wir e insulatio n a s a guid e fo r th e contoure d ti p o f
the backprob e adapter , gentl y slid e th e ti p int o th e
connecto r fro m th e wir e sid e unti l i t come s i n contac t
with th e termina l en d o f th e wire .
BACKPROB E SE T07SAZ-001000 A
(tw o required )
BACKPROB EADAPTER
STACKIN GPATCH COR D
TCM
DIGITA L MULTIMETE R
(Commerciall y available )
KS-AHM-32-003 ,or equivalen t
TCM Rese t Procedur e
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. Tur n th e ignitio n switc h OFF .
3 . Remov e th e No . 3 9 BAC K U P RADI O fus e (1 0 A )
fro m th e under-hoo d fuse/rela y bo x fo r 1 0 second s
t o rese t th e TCM .
NOTE : Th e TC M memor y canno t b e cleare d b y
usin g th e OB D II Sca n Too l o r Hond a PG M Tester ; b e
sur e to remov e th e BAC K U P RADI O fus e to rese t th e
TCM .
BACK U P RADI O
(1 0 A ) FUS E
UNDER-HOO D
FUSE/RELAYBOX
Fina l Procedur e
NOTE : Thi s procedur e mus t b e don e afte r an y trouble -
shooting.
1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e OB D II Sca n Too l o r Hond a PG M
Teste r fro m th e Dat a Lin k Connector , o r remov e th e
specia l too l fro m th e Servic e Chec k Connector .
3. Rese t th e TCM .
4. Tur n th e ignitio n switc h O N (II) .
5 . 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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Symptom-to-Component Char t
Electrica l Syste m
Diagnosti c
Troubl e Cod e
(DTC) *
P1753
(1)
P175 8
(2)
P179 0
(3)
P179 1
(4)
P170 5
(5)
P170 6
(6)
P075 3
(7)
P075 8
(8)
P072 0
(9)
P179 2
(10)
P072 5
(11)
Indicato r
Light
Blink s
Blink s
Blinks o r
OF F
Blink s
Blink s
OFF
Blink s
Blink s
Blinks
Blink s
OFF
Sympto m
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t disen -
gage.
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t engage .
• Fail s t o shif t othe r tha n 2n d - 4t h
gears .
• Lock-u p clutc h doe s no t engage .
• Fail s t o shif t othe r tha n 2n d - 3r d
- 4t h gears .
• Lock-u p clutc h doe s no t engage .
• Fail s t o shif t (betwee n 1s t - 4t h
o r 2n d - 3r d gea r only) .
• Fail s t o shif t (stuc k in 4t h gear) .
• Fail s t o shif t (stuc k i n 1s t o r 4t h
gears) .
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t engage . Possibl
e Caus e
• Disconnecte d lock-u p contro l solenoi d
valv e A connecto r
• Shor t o r ope n i n lock-u p contro l
solenoi d valv e A wir e
• Fault y lock-u p contro l solenoi d valv e A
• Disconnecte d lock-u p contro l solenoi d
valv e B connecto r
• Shor t o r ope n i n lock-u p contro l
solenoi d valv e B wir e
• Fault y lock-u p contro l solenoi d valv e B
• Disconnecte d throttl e positio n (TP )
senso r connecto r
• Shor t o r ope n in T P senso r wir e
• Fault y T P senso r
• Disconnecte d vehicl e spee d senso r
(VSS ) connecto r
• Shor t o r ope n i n VS S wir e
•Fault y VS S
• Shor t i n A/ T gea r positio n switc h wir e
• Fault y A/ T gea r positio n switc h
• Disconnecte d A/ T gea r positio n switc h
connecto r
• Ope n i n A/ T gea r positio n switc h wir e
• Fault y A/ T gea r positio n switc h
• Disconnecte d shif t contro l solenoi d
valv e A connecto r
• Shor t o r ope n i n shif t contro l solenoi d
valv e A wir e
• Fault y shif t contro l solenoi d valv e A
• Disconnecte d shif t contro l solenoi d
valv e B connecto r
• Shor t o r ope n i n shif t contro l solenoi d
valv e B wir e
• Fault y shif t contro l solenoi d valv e B
• Disconnecte d countershaf t spee d sen -
so r connecto r
• Shor t o r ope n i n countershaf t spee d
senso r wir e
• Fault y countershaf t spee d senso r
• Disconnecte d engin e coolan t tempera -
ture (ECT ) senso r connecto r
• Shor t o r ope n in EC T senso r wir e
• Fault y EC T senso r
• Disconnecte d ignitio n coi l connecto r
• Shor t o r ope n i n ignitio n coi l wir e
• Fault y ignitio n coi l
Refe r t o
Pag e
14-5 8
14-6 0
14-6 2
14-6 3
14-6 4
14-6 6
14-6 8
14-7 0
14-7 2
14-7 4
14-7 5
(DTC)* : Th e DTC s i n parenthese s ar e th e code s o f th e indicato r ligh t indicate s whe n th e servic e chec k connecto r i s con -
necte d to th e specia l too l (SC S servic e connector) .
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Diagnostic
Troubl e Cod e
(DTC) *
P1794
(13)
P178 6
(14)
P071 5
(15)
P176 8
(16)
P178 7
(18)
P074 0
(none )
P0730
(none )
Indicato r
Light
Blink s
Blinks
'95, '96 , '97
model s
OFF
'98 mode l
Blink s
Blinks
OFF
OF F
OFF
Sympto m
• N o specifi c sympto m appears .
• Transmissio n jerk s har d whe n
shifting .
• Transmissio n jerk s har d whe n
shifting .
• Lock-u p clutc h doe s no t engage .
• Fail s t o shif t (stuc k in 4t h gear) .
• Lock-u p clutc h doe s no t engage .
• Lock-u p clutc h doe s no t hav e
duty operatio n (O N OFF )
• Lock-u p clutc h doe s no t engage .
• Fail s t o shif t (betwee n 1s t -2nd,
1s t - 2n d - 3rd , 1st - 2nd - 4th , 1st
- 3r d - 4th , 2n d - 3r d - 4t h gear s
only) .
• Fail s t o shif t (stuc k in 1s t gear) .
Possibl e Caus e
• Shor t o r ope n in BARO S S (RED/BLU )
wir e betwee n B 2 termina l an d EC M
• Fault y barometri c pressur e (BARO )
sensor
NOTE : BAR O senso r i s buil t int o ECM .
• Shor t o r ope n in FA S (PNK ) wir e
betwee n B1 9 termina l an d EC M
• Fault y EC M
• Disconnecte d mainshaf t spee d senso r
connecto r
• Shor t o r ope n in mainshaf t spee d sen -
so r wir e
• Fault y mainshaf t spee d senso r
• Disconnecte d linea r solenoi d connecto r
• Shor t o r ope n in linea r solenoi d wir e
• Fault y linea r solenoi d
• Disconnecte d o r loose d P G termina l
• Shor t o r ope n in FF S (RED/GRN ) wir e
betwee n A2 4 termina l an d EC M
• Fault y EC M
• Fault y TC M
• Fault y lock-u p contro l syste m
• Fault y shif t contro l syste m
Refer t o
Pag e
14-7 6
14-77
14-7 9
14-8 1
14-8 3
14-8 4
14-8 5
(DTC)* : Th e DTC s i n parenthese s ar e th e code s o f th e indicato r ligh t indicate s whe n th e servic e chec k connecto r i s con -
necte d t o th e specia l too l (SC S servic e connector) .
If th e self-diagnosti c indicato r ligh t doe s no t blink , perfor m a n inspectio n accordin g t o th e tabl e below .
Sympto m
indicator ligh t doe s no t com e o n fo r tw o second s afte r ignitio n
switc h i s firs t turne d o n (II) .
indicato r ligh t i s o n constantl y (no t blinking ) wheneve r th e ignitio n
switch i s o n (II) .
Shif t leve r canno t b e move d fro m positio n wit h th e brak e peda l
depressed . Inspectio
n
Chec k brak e switc h signal . Ref
. pag e
14-86
14-8 8
14-8 9
NOTE :
If a custome r describe s th e sympto m fo r cod e P179 0 (3) , bu t th e indicato r ligh t i s no t blinking , P170 6 (6 ) o r P072 5
(11) , i t wil l b e necessar y t o recreat e th e sympto m b y test-driving , the n rechec k th e DTC .
Sometime s th e indicato r ligh t an d th e Malfunctio n Indicato r Lam p (MIL ) ma y com e o n simultaneously . I f so , repai r
th e PGM-F I syste m accordin g t o th e DTC , the n rese t th e memor y b y removin g th e BAC K U P RADI O fus e i n th e under -
das h fuse/rela y bo x fo r mor e tha n 1 0 seconds . Driv e th e vehicl e fo r severa l minute s a t a spee d ove r 3 0 mp h (5 0 km/h) ,
the n rechec k th e DTC .
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Lock-up Contro l Solenoi d Valv e A/ B
Tes t
NOTE : Lock-u p contro l solenoi d valve s A an d B mus t b e
removed/replace d a s a n assembly .
1 . Disconnec t th e transmissio n sub-harnes s connecto r
(14P).
2.Measur e th e resistanc e betwee n th e No . 1 termina l
(solenoi d valv e A ) o f th e transmissio n sub-harnes s
connecto r an d bod y ground , an d betwee n th e No . 3
termina l (solenoi d valv e B ) an d bod y ground .
STANDARD : 1 2 - 2 5
TRANSMISSIO N
SUB-HARNES S
CONNECTO R TRANSMISSIO
N SUB-HARNES S
CONNECTO R (14P )
TERMINA L SID E
O F MAL E
TERMINAL S
3. I f th e resistanc e i s ou t of specification , disconnec t
th e 2 P connecto r fro m th e lock-u p contro l solenoi d
valv e A/B .
4. Measur e th e resistanc e betwee n th e No . 1 termina l
(solenoi d valv e A ) of the lock-u p contro l solenoi d
connecto r an d bod y ground , an d betwee n th e No . 2
termina l (solenoi d valv e B ) an d bod y ground .
STANDARD : 1 2 - 2 5
LOCK-U P CONTRO L
SOLENOI D VALV E
ASSEMBL Y LOCK-U
P CONTRO L
SOLENOI D CONNECTO R
WIR E SID E O F
FEMAL E TERMINAL S
5.
6.
7 .
If th e resistanc e i s OK , replac e th e transmissio n
sub-harness.
Replace th e lock-u p contro l solenoi d valv e assem -
bly if th e resistanc e is ou t o f specification .
If th e resistanc e i s withi n th e standard , connec t th e
No . 1 termina l o f th e lock-u p contro l solenoi d valv e
connecto r t o th e batter y positiv e terminal . A clickin g
soun d shoul d b e heard . Connec t th e No . 2 termina l t o
th e batter y positiv e terminal . A clickin g soun d shoul d
b e heard . Replac e th e lock-u p contro l solenoi d valv e
assembl y if n o clickin g soun d is heard .
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Replacement
1. Remov e th e mountin g bolt s an d lock-u p contro l
solenoi d valv e assembly .
NOTE : B e sur e t o remov e o r replac e th e lock-u p
contro l solenoi d valv e A an d B as a n assembly .
2 . Chec k th e lock-u p contro l solenoi d valv e flui d pas -
sage s fo r dus t o r dirt , an d replac e a s a n assembly , i f
necessary .
6 x 1. 0 m m12 N- m(1.2 kgf-m , 8. 7 Ibf-ft )
LOCK-U P CONTRO LSOLENOID VALV EASSEMBL Y
3.
4 .
FILTER/GASKE T
Replace.
Clean mountin g surfac eand flui d passages .
Clean th e mountin g surfac e an d flui d passage s o f th e
lock-u p contro l solenoi d valv e assembly , an d instal l a
ne w lock-u p contro l solenoi d valv e A/ B wit h a ne w
filter/gasket .
Chec k connecto r fo r rust , dir t o r oil , an d reconnec t i t
securely .
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Shift Contro l Solenoi d Valv e
Test
1. Disconnec t th e transmissio n sub-harnes s connecto r
(14P).
2. Measur e th e resistanc e betwee n th e No . 4 termina l
of th e transmissio n sub-harnes s an d bod y ground ,
and betwee n th e No . 5 termina l an d bod y ground .
STANDARD : 1 2 - 2 5
TRANSMISSIO N
SUB-HARNES S
CONNECTOR
TRANSMISSIO N SUB-HARNES SCONNECTOR (14P )
TERMINA L SID E
O F MAL E
TERMINAL S
3. I f th e resistanc e i s ou t o f specification , disconnec t
th e transmissio n sub-harnes s fro m th e shif t contro l
solenoi d valv e harness .
4 . Measur e th e resistanc e betwee n th e No . 2 termina l
of th e shif t contro l solenoi d valv e harnes s an d bod y
ground , an d betwee n th e No . 1 termina l an d bod y
ground .
STANDARD : 1 2 - 2 5
SHIF T CONTRO L
SOLENOI D VALV E
HARNES S CONNECTO R
SHIFT CONTRO L
SOLENOI D
CONNECTO R
WIRE SID E O F
FEMAL E TERMINAL S
5. Replac e th e transmissio n sub-harnes s i f th e resis -
tance is withi n specification .
6. Replac e th e shif t contro l solenoi d valv e assembl y i f
th e resistanc e is ou t o f specification .
7. I f th e resistanc e i s withi n th e standard , connec t th e
No . 2 termina l o f th e shif t contro l solenoi d valv e
connecto r t o th e batter y positiv e terminal . A clickin g
soun d shoul d b e heard . Connec t th e No . 1 termina l
t o th e batter y positiv e terminal . A clickin g soun d
should b e heard . Replac e th e shif t contro l solenoi d
valve assembl y if n o clickin g soun d is heard .
NOTE : I f th e solenoi d valv e replacemen t i s required ,
se e Shif t Contro l Solenoi d Valv e Replacemen t (se e
pag e 14-113 ).
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Linear Solenoi d
Test
1. Disconnec t th e transmissio n sub-harnes s connecto r
(HP).
2. Measur e th e resistanc e betwee n th e No . 8 an d No . 9
terminal s o f th e transmissio n sub-harness .
STANDARD: 5. 0 - 5. 6 (a t 70°F , 20°C )
TRANSMISSIO NSUB-HARNESSCONNECTOR TRANSMISSIO
N SUB-HARNES S
CONNECTO R (14P )
TERMINA L SID E
O F MAL E
TERMINAL S
3. I f th e resistanc e is ou t o f specification , disconnec t th e
transmissio n sub-harnes s fro m th e linea r solenoi d
harness.
4. Measur e th e resistanc e betwee n th e No . 1 an d No . 2
terminal s of the linea r solenoi d harness .
STANDARD : 5. 0 - 5. 6 (a t 70°F , 20°C )
LINEA R SOLENOI DCONNECTO R
WIRE SID E O F
FEMAL E TERMINAL S LOCK-U
P CONTRO L
SOLENOI D VALV E
ASSEMBL Y
LINEA R SOLENOI D
HARNESSCONNECTO R
5. Replac e th e transmissio n sub-harnes s i f th e resis -
tanc e i s withi n specification .
6 . Replac e th e linea r solenoi d i f th e resistanc e is ou t o f
specification .
7 . I f th e resistanc e i s withi n th e standard , connec t th e
No . 2 termina l o f th e linea r solenoi d connecto r t o
th e batter y positiv e termina l an d connec t th e No . 1
termina l t o th e batter y negativ e terminal . A clickin g
soun d shoul d b e heard . I f n o clickin g soun d i s
heard , replac e th e linea r solenoi d an d throttl e valv e
bod y a s a n assembly .
NOTE : I f th e linea r solenoi d replacemen t i s required ,
se e Throttl e Valv e Body/Linea r Solenoi d Replacemen t
(se e pag e 14-147 ).
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