1995 ACURA TL Service Repair Manual

Different wire s wit h th e sam e colo r hav e bee n give n a numbe r suffi x t o distinguis h the m (fo r example ,
YEL/BLK1 an d YEL/BLK2 ar e no t th e same) .
: Relate d to Fue l an d Emission s System .
— Connecto r wit h mal e terminal s (doubl e outline) : Vie w fro m termina l sid e
— Connecto r wit h femal e terminal s (singl e outline) : Vie w fro m wir e sid e
NOTE :
C612 C61 3 C77 3
C427 C42 9 C51 9 C60 3
C41
7 C41 8 C48 2 C41 5 C41 5
C402 C40 4 C40 3 C40 5 C40 6
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System Descriptio n
System Connector s [Das h an d Floor ] (cont'd )
C408C43 0
C436
C475
C47 9TCS CONTRO LUNIT
C455 /C622
C440(PCM-E )
C432
(PCM-A )C441(PCM-F )
C449
C43 3
(PCM-B )
C43
5
(PCM-D )
C43
4
(PCM-C )
C474
C446
PCM
C47 7
C47 6
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Different wires with the same color have been given a number suffix to distinguish them (for example,

YEL/BLK1 and YEL/BLK2 are not the same).

: Related to Fuel and Emissions System.

— Connector with male terminals (double outline): View from terminal side

— Connector with female terminals (single outline): View from wire side

*2: '97 - 98 models
NOTE:
C475 C476 C477 C479
C441 (PCM-F) C446 C449 C455 C474
C434 (PCM-C) C435 (PCM-D) C436 C440 (PCM-E)
C408 C430 C432 (PCM-A) C433 (PCM-B)ProCarManuals.com

Troubleshooting
Troubleshooting Procedure s
I. Ho w T o Begi n Troubleshootin g
Whe n th e Malfunctio n Indicato r Lam p (MIL ) ha s bee n reporte d on , o r ther e i s a driveabilit y problem , us e th e appropri -
at e procedur e belo w to diagnos e an d repai r th e problem .
A . Whe n th e MI L ha s com e on :
1 . Connec t th e Hond a PG M Teste r o r a n OB D II sca n too l t o th e 16 P Dat a Lin k Connecto r (DLC ) locate d o n th e cente r
consol e behin d th e ashtray .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Chec k th e DT C an d not e it . Als o chec k an d not e th e
freez e fram e data .
Refe r t o th e Diagnosti c Troubl e Cod e Char t an d
begi n troubleshooting .
MALFUNCTIONINDICATORLAMP(MIL)
NOTE :
See th e OB D II sca n too l o r Hond a PG M Teste r user' s manual s fo r specifi c operatin g instructions .
Th e sca n too l o r teste r ca n rea d th e Diagnosti c Troubl e Code s (DTC) , freez e fram e data , curren t data , an d othe r
Powertrai n Contro l Modul e (PCM ) data .
Freez e fram e dat a indicate s th e engin e condition s whe n th e firs t malfunction , misfir e o r fue l tri m malfunctio n wa s
detected . I t ca n b e usefu l informatio n whe n troubleshooting .
B . Whe n th e MI L ha s no t com e on , bu t ther e is a driveabilit y problem , refe r t o th e Sympto m Char t o n pag e 11-34 .
C . DTC s wil l b e indicate d b y th e blinkin g o f th e Malfunctio n Indicato r Lam p (MIL ) wit h th e SC S servic e connecto r
connected .
• Connec t th e SC S servic e connecto r t o Servic e Chec k Connecto r a s shown . (Th e 2 P Servic e Chec k Connecto r
i s locate d unde r th e das h o n th e passenger' s sid e o f th e car. ) Tur n th e ignitio n switc h O N (II) .
DAT A LIN K CONNECTO R (16P )SERVIC E CHEC KCONNECTO R (2P )
OBD II SCA N TOO L o rHOND A PG M TESTE R
SCS SERVIC E CONNECTO R07PAZ-001010 0
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II. Powertrain Control Module (PCM) Reset Procedure

Either of the following actions will reset the PCM

Use the OBD II scan tool or Honda PGM Tester to clear the PCM's memory.

NOTE: See the OBD II scan tool or Honda PGM Tester user's manuals for specific operating instructions.

Turn the ignition switch OFF. Remove the BACK UP RADIO (10 A) fuse from the under-hood fuse/relay box for

10 seconds.

BACK UP RADIO

(10 A) FUSE

UNDER-HOOD

FUSE/RELAY

BOX

III. Final Procedure (this procedure must be done after any troubleshooting)

1. Remove the SCS Service Connector if it is connected.

NOTE: If the SCS service connector is connected and there are no DTCs stored in the PCM, the MIL will stay

on when the ignition switch is turned ON (II).

2. Do the PCM Reset Procedure.

3. Turn the ignition switch OFF.

4. Disconnect the OBD II scan tool or Honda PGM Tester from the Data Link Connector (16P).ProCarManuals.com

Troubleshooting
Troubleshootin g Procedure s (cont'd )
If th e inspectio n fo r a particula r cod e require s voltag e o r resistanc e check s a t th e PC M connectors , remov e th e righ t
doo r sil l molding . Pul l th e carpe t bac k t o expos e th e PCM . Unbol t th e PC M cover , an d connec t th e backprob e set s an d
a digita l multimete r a s describe d below . Chec k th e syste m accordin g t o th e procedur e describe d fo r th e appropriat e code(s )
liste d o n th e followin g pages .
PCM COVE R
PCM
Ho w to Us e th e Backprob e Set s
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 th e backprob e adapter , gentl y slid e th e ti p int o th e connecto r fro m th e wir e
side unti l i t come s i n contac t wit h termina l en d o f th e wire .
DIGITA L MULTIMETE R
(Commerciall y available ) o r
KS - AH M - 32 - 00 3
BACKPROB E SE T
07SA Z - 001000 A (Tw o required )
Backprob e Adapter
Stackin
g Patc h
Cor d
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CAUTION:

Puncturing the insulation on a wire can cause poor or intermittent electrical connections.

Bring the tester probe into contact with the terminal from the terminal side of wire harness connectors in the engine

compartment. For female connectors, just touch lightly with the tester probe and do not insert the probe.

RUBBER SEAL
TESTER PROBE

WIRE HARNESS

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Troubleshooting
Troubleshootin g Procedure s (cont'd )
Sympto m Char t
Liste d belo w ar e symptom s an d probabl e cause s fo r problem s tha t D O NO T caus e th e Malfunctio n Indicato r Lam p (MIL ) t o
com e on . I f th e MI L wa s reporte d on , g o to pag e 11-32 .
Troubleshoo t eac h probabl e caus e in th e orde r liste d (fro m lef t t o right ) unti l th e sympto m is eliminated .
Th e probabl e caus e an d troubleshootin g pag e referenc e ca n b e foun d below .
SYMPTO M
Engin e wil l no t star t
Har d startin g
Col d fas t idl e to o lo w
Col d fas t idl e to o hig h
Idl e spee d fluctuate s
Misfir e o r roug h runnin g
Lo w powe r
Engin e stall s
PROBABL E CAUS E
2, 3 , 21 , 13 , 1
2 , 10 , 12 , 20 , 2 1
5, 6 , 7 , 4
5 , 6 , 7 , 9 , 8
5 , 14 , 15 , 6 , 7 , 9 , 8
Troubleshoo t fo r misfir e o n page s 11-85 , 11-8 9
2, 8 , 9 , 11 , 18 , 17 , 19 , 1 0
2, 5 , 10 , 21 , 7 , 3 , 1 6
Othe r Probabl e Cause s fo r a n engin e tha t wil l no t start :
— Compressio n
— PGM-F I mai n rela y
— Engin e locke d u p
— Timin g bel t
Probabl e Caus e Lis t (for DTC chart see page 11-45).
—
Startin g syste m
— Ignitio n syste m
— Overheatin g
— Batter y
Probabl e Caus e
1
2
3
4
5
6
7
8
9
10
1 1
1 2
13
1 4
15
1 6
17
18
19
2 0
2 1
Pag e
11-5 3, 11-54
11-11 9
(See DTC chart)
(See DTC chart)
(See DTC chart)
11-113
11-11 4
11-136
11-13 5
(See DTC chart)
(See DTC chart)
(See DTC chart)
Sectio n 1 4
11-10 4
11-106
11-112
11-13 4
11-138
11-14 4
11-153
System
Powertrai n Contro l Modul e (PCM )
Fuel pressur e
Crankshaf t Position/Cylinde r Positio n senso r circui t
Intak e Ai r Temperatur e (IAT ) senso r circui t
Idl e Ai r Contro l (IAC ) Valv e
Fas t idl e therm o valv e
Idl e spee d adjustmen t
Throttl e bod y
Throttl e cabl e
Manifol d Absolut e Pressur e (MAP ) senso r
Throttl e Positio n (TP ) senso r
Barometri c pressur e (BARO ) senso r
A/ T gea r positio n signa l
Ai r Conditionin g Signa l
Alternato r F R Signa l
Brak e switc h signa l
Air Cleane r
Intake Ai r Bypas s (IAB ) contro l syste m an d intak e ai r duc t
Thre e Wa y Catalyti c Converte r (TWC )
Evaporativ e emissio n (EVAP ) contro l
Contaminate d fue l
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