ACURA TL 1995 Service Repair Manual

A/T Contro l Syste m
The PC M termina l voltag e an d measurin g condition s ar e show n fo r th e connecto r terminal s tha t ar e relate d t o th e A/ T con -
tro l system . Th e othe r PC M termina l voltag e an d measurin g condition s ar e describe d i n sectio n 11.
PC M CONNECTO R A (26P )
Termina l Numbe r
A1 to A11
A12
A13
A14 to A24
A2 5
A2 6
Signa l Descriptio n Measurin g Conditions/Termina l Voltag e
-see section 11 -
PG1
IGP 1
Groun d
Power suppl y syste m With ignitio n switc h O N (II) : Batter y
With ignitio n switc h OFF : 0 V
voltag e
- see section 11 -
PG2
LG1
Groun d
Groun d
PC M CONNECTO R B (16P )
Termina l Numbe r
B1
B 2 to B 8
B9
B10 to B12
B1 3
B14 to B16
Signa l
IGP2
Descriptio n
Power suppl y syste m
Measurin g Conditions/Termina l Voltag e
With ignitio n switc h O N (II) : Batter y voltag e
Wit h ignitio n switc h OFF : 0 V
- se e sectio n 1 1 -
LG 2Groun d
- se e sectio n 1 1 -
VS SVehicl e Spee d Senso r (VSS )
signa l Inpu tWith ignitio n switc h O N (II ) an d rotatin g fron t
wheels : 0V - 5V cycle
- see section 11 -
PCM CONNECTO R C (12P )
Termina l Numbe r
C1 t o C 4
C5
C6 to C12
Signa lDescriptio nMeasuring Conditions/Termina l Voltag e
-see sectio n 1 1 -
SC SServic e chec k signa l
With ignitio n switc h O N (II ) an d servic e chec k
connecto r open : 5 V
Wit h ignitio n switc h O N (II ) an d servic e chec k
connecto r connecte d wit h specia l tool : 0 V
- see section 11 -
PCM Termina l Voltage/Measurin g Condition s
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PCM CONNECTO R D (22P )
Termina l Numbe r
D1
D 2 to D 5
D6
D7
D 8 to D2 0
D21
D2 2
Signa l
VBU
Descriptio n
Back-up powe r syste m
Measurin g Conditions/Termina l Voltag e
Always batter y voltag e
- se e sectio n 1 1 -
TP S
EC T
Throttl e Positio n (TP ) senso r
signa l inpu t
Engin e Coolan t Temperatur e
(ECT ) senso r signa l inpu t Wit
h ignitio n switc h O N (II ) an d throttl e full y
open : Abou t 4. 8 V
Wit h ignitio n switc h O N (II ) an d throttl e full y
closed : Abou t 0. 1 V
Wit h ignitio n switc h O N (II ) an d dependin g o n
engin e coolan t temperature : Abou t 0. 1 V - 4. 8 V
-se e sectio n 1 1 -
VCC 2
SG2
Sensor s powe r suppl y circui t
Sensor s groun d Wit
h ignitio n switc h O N (II) : Abou t 5 V
PC M CONNECTO R E (26P )
(cont'd )
Termina l Numbe r
E1
E2
Signa l Descriptio
n
Measuring Conditions/Termina l Voltag e
Powe r suppl y circui t fo r shif t an d
lock-u p contro l solenoi d valve s
VBSO L
STOP S WBrak e switc h signa l inpu t
E3
E 4
E5
E 6
E7
E 8
E9
E1 0
E1 1
E1 2SH A
ATP 1
ATP2
ATPD
3
ATPD 4
ATPR
TCSF T
NC
NM
LS +Linea r solenoi d powe r suppl y
positiv e electrod e
Mainshaf t spee d senso r signa l
input
Countershaf t spee d senso r signa l
input
A/T gea r positio n signa l fo r
tractio n contro l outpu t
Shif t contro l solenoi d valv e A
contro l Wit
h ignitio n switc h O N (II) : Batter y voltag e
Wit h ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II ) an d brak e peda l
depressed : Batter y voltag e
Wit h ignitio n switc h O N (II ) an d brak e peda l
released : 0 V
Wit h ignitio n switc h O N (II) : Pulsin g signa l
Dependin g o n vehicl e speed : Pulsin g signa l
Whe n engin e is stopped : 0 V
Dependin g o n vehicl e speed : Pulsin g signa l
Whe n vehicl e is stopped : 0 V
Wit h ignitio n switc h O N (II) : Pulsin g signa l
posi -
posi -
posi -
posi -
posi -A/T gea r positio n switc h
tion signa l inpu t
A/T gea r positio n switc h
tion signa l inpu t
A/T gea r positio n switc h
tio n signa l inpu t
A/ T gea r positio n switc h
tio n signa l inpu t
A/ T gea r positio n switc h
tio n signa l inpu t
position , i n
position : 0 V
4t h gea r i n
position
, i n 2n d an d 3r d gea r i n
position : Batter y voltag e
In
Inposition , i n 1s t gea r i n
position
: Batter y voltag e
I n othe r tha n
Inposition : 0 V
In
In othe r tha n
position
: 0 V
position : Batter y voltag e
In
I n
othe r tha n
position : 0 V
position : Batter y voltag e
position
: Batter y voltag e
I n othe r tha n
position
: 0 V
In
In
I n
position : 0 V
othe r tha n position : Batter y voltag e
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PCM CONNECTO R E (26P ) (cont'd )
Termina l Numbe r
E13
EH
E1 5
E16
E17
E1 8
E19
E2 0
E21
E2 2
E23
E2 4
E2 5
E2 6
Signa l
LCA
LS-
NMS G
NCSG
ILU
D4IN D
ATPP N
SHB
LCB
Descriptio n
Lock-up contro l solenoi d valv e A
contro l
No t use d
No t use d
Linea r solenoi d powe r suppl y
negativ e electrod e
Mainshaf t speed senso r groun d
Countershaf t spee d senso r groun d
No t use d
No t use d
No t use d
Interloc k contro l
A/T gea r positio n switc h posi -
tio n signa l outpu t
A/T gea r positio n switc h an d
positio n signal s outpu t
Shif t contro l solenoi d valv e B
contro l
Lock-u p contro l solenoi d valv e B
contro l
Measurin g Conditions/Termina l Voltag e
When lock-u p is ON : Batter y voltag e
Wit h n o lock-up : 0 V
Wit h ignitio n switc h O N (II) : Pulsin g signa l
Always : 0 V
Always : 0 V
Whe n ignitio n switc h i s O N (II) , brak e peda l
depresse d an d accelerato r peda l released :
Batter y voltag e
When ignitio n switc h is firs t turne d O N (II) :
Batter y voltag e fo r tw o second s
In position : 5 V o r mor e
In othe r tha n position : 0 V
In an d positions : 5 V or mor e
In othe r tha n an d positions : 0 V
In , position , i n 1s t an d 2n d gea r i n S3 , @
position : Batter y voltag e
In 3r d gea r i n , position , i n 4t h gea r i n E
position : 0 V
Durin g hal f an d ful l lock-u p an d durin g deceler -
ation : Pulsin g 0 V an d batter y voltag e
Durin g n o lock-up: 0 V
PC M CONNECTO R F (8P )
Termina l Numbe r
F1 t o F 8
Signa lDescriptio nMeasuring Conditions/Termina l Voltag e
- se e section 11-
A/ T Contro l Syste m (cont'd )
PCM Termina l Voltage/Measurin g Condition s
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Component Locations

POWERTRAIN CONTROL

MODULE (PCM)

PGM-FI

MAIN RELAY

COUNTERSHAFT

SPEED SENSOR
MAINSHAFT SPEED SENSOR

LOCK-UP CONTROL

SOLENOID VALVE

A/B ASSEMBLY
SHIFT CONTROL SOLENOID

VALVE A/B

(Located in transmission.)

VEHICLE SPEED

SENSOR(VSS)
LINEAR SOLENOID

(Located in transmission.)
AUTOMATIC TRANSAXLE (A/T)

GEAR POSITION SWITCHProCarManuals.com

Troubleshooting Procedure s
Checking th e Diagnosti c Troubl e Cod e (DTC )
wit h a n OB D II Sca n too l o r Hond a PG M Teste r
When th e PC M sense s a n abnormalit y i n th e inpu t o r outpu t systems , th e indicato r ligh t i n th e gaug e assembl y wil l
blink . Whe n th e 16 P Dat a Lin k Connecto r (DLC ) (locate d behin d th e ashtray ) i s connecte d to th e OB D II Sca n Too l o r Hond a
PG M Teste r a s shown , th e sca n too l o r teste r wil l indicat e th e Diagnosti c Troubl e Cod e (DTC ) whe n th e ignitio n switc h i s
turne d O N (II) .
Whe n th e indicato r ligh t ha s bee n reporte d on , connec t th e OB D II Sca n Too l conformin g t o SA E J197 8 o r Hond a PG M
Teste r t o th e DL C (16P ) behin d th e ashtray . Tur n th e ignitio n switc h o n (II) , an d observ e th e DT C o n th e scree n o f th e OB D II
Sca n Too l o r Hond a PG M Tester . Afte r determinin g th e DTC , refe r t o th e electrica l syste m Symptom-to-Componen t Char t
o n pag e 14-6 8 an d 14-69 .
NOTE : Se e th e OB D II Sca n Too l o r Hond a PG M Teste r user' s manua l fo r specifi c instructions .
DATA LIN K CONNECTO R (16P )
OBD II SCA N TOO L o r
HOND A PG M TESTE R
Some PGM-F I problem s wil l als o mak e th e indicator light com e on . Afte r repairin g th e PGM-F I system , disconnec t th e
BAC K UP , RADI O fus e (1 0 A ) i n th e under-hoo d fuse/rela y bo x fo r mor e tha n 1 0 second s t o rese t th e PC M memory , the n
retest .
NOTE : Disconnectin g th e BAC K UP , RADI O fus e als o cancel s th e radi o anti-thef t code , prese t station s an d th e cloc k setting .
Ge t th e customer' s cod e number , an d mak e not e o f th e radi o preset s befor e removin g th e fus e s o yo u ca n rese t them .
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Checking th e Diagnosti c Troubl e Cod e (DTC )
wit h th e Servic e Chec k Connecto r an d Specia l Too l
Whe n th e PC M sense s a n abnormalit y i n th e inpu t o r outpu t systems , th e indicato r ligh t i n th e gaug e assembl y wil l blink .
Whe n th e Servic e Chec k Connecto r (locate d unde r th e das h o n th e passenge r side ) i s connecte d wit h th e specia l too l a s
shown , th e indicato r ligh t wil l blin k th e Diagnosti c Troubl e Cod e (DTC ) whe n th e ignitio n switc h i s turne d o n (II) .
Whe n th e indicato r ligh t ha s bee n reporte d on , connec t th e Servic e Chec k Connecto r wit h th e specia l tool .
Then tur n th e ignitio n switc h o n (II ) an d observ e th e indicato r light .
GAUG E ASSEMBL Y
SERVICE CHEC K
CONNECTO R (2P )
INDICATO R
LIGH T
SCS SERVIC E CONNECTO R07PAZ-001010 0
Codes 1 throug h 9 ar e indicate d b y individua l shor t blinks . Code s 1 0 an d abov e ar e indicate d b y a serie s o f lon g an d shor t
blinks . On e lon g blin k equal s 1 0 shor t blinks . Ad d th e lon g an d shor t blink s togethe r t o determin e th e code . Afte r deter -
mining th e code , refe r to th e electrica l syste m Symptom-t o Component Char t o n page s 14-6 8 an d 14-69 .
Some PGM-F I problem s wil l als o mak e th e indicato r ligh t com e on . Afte r repairin g th e PGM-F I system, disconnec t th e
BAC K UP , RADI O fus e (1 0 A ) i n th e under-hoo d fuse/rela y bo x fo r mor e tha n 1 0 second s t o rese t th e PC M memory , the n
retest .
NOTE : Disconnectin g th e BAC K UP , RADI O fus e als o cancel s th e radi o anti-thef t code , prese t station s an d th e cloc k setting .
Ge t th e customer' s cod e number , an d mak e not e o f th e radi o preset s befor e removin g th e fus e s o yo u ca n rese t them .
(cont'd )
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Troubleshooting Procedure s
(cont'd)
SRS component s ar e locate d i n 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 .
1 . Remov e th e heate r lowe r cove r o n th e passenger' s sid e (se e sectio n 20 ).
2 . Pul l th e carpe t bac k t o expos e th e PC M cover .
3 . Remov e th e PC M cove r mountin g nuts , the n tur n th e PC M over .
MOUNTIN G NUT S
PCM
PCM COVE R
4. Inspec t th e circui t o n th e PC M accordin g t o th e troubleshootin g flowchar t wit h th e specia l tool s an d a digita l multime -
te 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 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 sid e unti l i t come s i n contac t wit h th e termina l en d o f th e wire .
BACKPROB E SE T07SAZ-00100 ABACKPROBE
ADAPTE R
STACKIN G PATC H
CORD S
PCM(tw o required )
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PCM Reset Procedure

1. Make sure you have the anti-theft code for the radio, then write down the frequencies for the radio's preset buttons.

2. Turn the ignition switch OFF.

3. Remove the BACK UP, RADIO fuse (10 A) from the under-hood fuse/relay box for 10 seconds to reset the PCM.

NOTE: The PCM memory can also be cleared by using the OBD II Scan Tool or Honda PGM Tester.

BACK UP, RADIO

(10 A) FUSE

UNDER-HOOD

FUSE/RELAY

BOX

Final Procedure

NOTE: This procedure must be done after any troubleshooting.

1. Turn the ignition switch OFF.

2. Disconnect the OBD II Scan Tool or Honda PGM Tester from the Data Link Connector (16P), or remove the special tool

from the Service Check Connector.

3. Reset the PCM.

4. Turn the ignition switch ON (II).

5. Enter the anti-theft code for the radio, then enter the customer's radio station presets.ProCarManuals.com

Symptom-to-Component Char t
Electrica l Syste m
Diagnosti c
Troubl e Cod e
(DTC) *
P1753
(1)
P175 8
(2)
P179 1
(4)
P170 5
(5)
P170 6
(6)
P075 3
(7)
P075 8
(8)
P072 0
(9)
P071 5
(15)
P176 8
(16)
Indicato r
Light
Blink s
Blink s
Blinks
Blink s
OFF
Blink s
Blink s
Blinks
'96, '97
model s
OFF
'98 mode l
Blinks
Blink s
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 .
• 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 to 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 .
• Transmissio n jerk s har d whe n
shifting .
• Lock-u p clutc h dos e no t engage .
• 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) . 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
• Ope n in V B SO L lin e
• Disconnecte d lock-u p contro l solenoi d
valv e B connecto r
• Shor t o r ope n in lock-u p contro l
solenoi d valv e B wir e
• Fault y lock-u p contro l solenoi d valv e B
• Ope n in V B SO L lin e
• Disconnecte d vehicl e spee d senso r
(VSS) connecto r
• Shor t o r ope n in 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 in 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
• Ope n in V B SO L lin e
• 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
• Ope n in V B SOL line
• Disconnecte d countershaf t spee d sen -
sor 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 mainshaf t spee d senso r
connecto r
• Shor t o r ope n i n 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 i n linea r solenoi d wir e
• Fault y linea r solenoi d
• Ope n in V B SOL line Refe
r t o
Pag e
14-7 0
14-72
14-74
14-7 5
14-78
14-8 0
14-82
14-84
14-8 6
14-8 8
(DTC)* : Th e DTC s in 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) *
P0740
(40)
P073 0
(41)
Indicato r
Ligh t
OFF
OF F
Sympto m
• Lock-u p clutc h doe s no t engage .
• Fail s to shif t (betwee n 1s t - 2nd ,
2n d - 4t h o r 2n d - 3r d gear s only) .
• Fail s t o shif t (stuc k i n 1s t o r 4t h
gears) .
Possibl e Caus e
• Fault y lock-u p contro l syste m
• Fault y shif t contro l syste mRefer t o
Pag e
14-8 9
14-9 0
(DTC)* : Th e DTC s in 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
indicato r 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
switc h 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.
page
14-9 1
14-9 3
14-9 4
NOTE : 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 UP , RADI O fus e in 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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