dashboard ACURA TL 1995 Service Repair Manual

Description

The automatic transmission is a combination of a 3-element torque converter and a dual-shaft electronically controlled

automatic transmission which provides 4 speeds forward and 1 reverse. The entire unit is positioned in line with the engine.

Torque Converter, Gears and Clutches

The torque converter consists of a pump, turbine, and stator, assembled in a single unit. They are connected to the engine

crankshaft so they turn together as a unit as the engine turns. Around the outside of the drive plate is a ring gear which

meshes with the starter pinion when the engine is being started.

The entire torque converter assembly serves as a flywheel while transmitting power to the transmission mainshaft.

The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in line with the engine

crankshaft. The mainshaft includes the 1st, 4th and 2nd clutches and gears for 4th, 1st, 2nd and reverse (3rd gear is integral

with the mainshaft). The countershaft includes the 3rd, 1st-hold and reverse clutches, and gears for 3rd, 4th, 1st, 2nd,

reverse and parking. The secondary drive gear is integrated with the countershaft. The gears on the mainshaft are in con-

stant mesh with those on the countershaft. When certain combinations of gears in the transmission are engaged by clutch-

positions.

and
es, power is transmitted from the mainshaft to the countershaft to provide

Electronic Control

The electronic control system consists of a Powertrain Control Module (PCM), sensors, a linear solenoid and four solenoid

valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions.

The PCM is located below the dashboard, under the front lower panel on the passenger's side.

Hydraulic Control

The lower valve body assembly includes the main valve body, the secondary valve body, the throttle valve body, the lin-

ear solenoid, the shift control solenoid valves and the ATF passage body. They are bolted on the lower part of the trans-

mission housing. The regulator valve body, the ATF pump body, and the accumulator body are bolted to the torque con-

verter housing.

The main valve body on '96 model contains the manual valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the

4-3 kick-down valve and the Clutch Pressure Control (CPC) valve. The main valve body on '97 model contains the manual

valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the 4-3 kick-down valve and the main orifice control valve.

The secondary valve body on '96 model contains the 3-4 orifice control valve, the 4-3 shift timing valve, the modulator valve

and the accumulator pistons.The secondary valve body on '97 model contains the 3-4 orifice control valve, the 4-3 shift tim-

ing valve, the line pressure control valve, the modulator valve and the accumulator pistons. The throttle valve body

includes the throttle valve which is bolted onto the secondary valve body. The linear solenoid is joined to the throttle valve

body. The regulator valve body contains the regulator valve, the lock-up shift valve and the cooler relief valve. Fluid from

the regulator passes through the manual valve to the various control valves. The ATF pump body contains the lock-up tim-

ing valve, the lock-up control valve and the relief valve. The torque converter check valve is located in the torque converter

housing under the ATF pump body. The accumulator body contains the accumulator pistons. The reverse accumulator and

the 1st-hold accumulator pistons are assembled in the rear cover.

The 1st, 1st-hold, 2nd and reverse clutches receive fluid from their respective feed pipes, and the 3rd and 4th clutches

receive fluid from the internal hydraulic circuit.

Shift Control Mechanism

Input from various sensors located throughout the vehicle determines which shift control solenoid valve the PCM will acti-

vate. Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes a

line to one of the clutches, engaging the clutch and its corresponding gear.

er through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place, the

mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the PCM optimizes the tim-

ing of the lock-up mechanism. The lock-up valves control the range of lock-up according to lock-up control solenoid valves

A and B, and throttle valve. When lock-up control solenoid valves A and B activate, modulator pressure changes. The lock-

up control solenoid valves A and B are mounted on the torque converter housing, and are controlled by the PCM.

(cont'd)
Lock-up Mechanism

In
position, in 2nd, 3rd, and 4th, and
position in 3rd, pressurized fluid is drained from the back of the torque convert-ProCarManuals.com

Electronic Control System

The electronic control system consists of a Powertrain Control Module (PCM), sensors, a linear solenoid and four solenoid

valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions.

The PCM is located below the dashboard, under the front lower panel on the passenger's side.ProCarManuals.com

Dashboard
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SRS Uni t Precaution s
Take extr a car e whe n paintin g o r doin g bod y wor k i n
th e are a belo w th e dashboard . Avoi d direc t exposur e
of th e SR S uni t o r wirin g t o hea t guns , welding , o r
sprayin g equipment .
Disconnec t th e airba g connector s befor e disconnect -
in g SR S harnes s connector s (se e pag e 24-11 ). O n a
'9 6 model , connec t th e shor t connecto r t o th e fron t
passenger' s airba g connector .
Afte r an y degre e o f fronta l bod y damage , o r afte r a
collisio n withou t airba g deployment , inspec t th e SR S
uni t fo r physica l damage . I f i t i s dented , cracked , o r
deformed , replac e it .
B e sur e th e SR S uni t i s installe d securely .
D o no t disassembl e th e SR S unit .
Stor e th e SR S uni t i n a coo l (les s tha n abou t 104°F /
40°C ) an d dr y (les s tha n 80 % humidity , n o moisture )
place. D o no t spil l wate r o r oi l o n th e SR S unit , an d
kee p it awa y fro m dust .
Durin g installatio n o r replacement , b e carefu l no t t o
bum p (impac t wrench , hammer , etc. ) th e are a aroun d
the SR S unit . Th e airbag s coul d accidentall y deplo y
and caus e damag e o r injury .
Inspectio n Afte r Deploymen t
After a collisio n i n whic h th e airbag s wer e deployed ,
replac e th e SR S unit , an d inspec t th e following :
1 . Inspec t al l th e SR S wir e harnesses . Replace , don' t
repair , an y damage d harnesses .
2 . Inspec t th e cabl e ree l fo r hea t damage . I f ther e is an y
damage , replac e th e cabl e reel .
3 . Afte r th e vehicl e i s completel y repaired , tur n th e
ignitio n switc h on . I f th e SR S indicato r ligh t come s
o n fo r abou t si x second s an d the n goe s off , th e SR S
syste m is OK . I f th e indicato r ligh t doe s no t functio n
properly , g o t o SR S Troubleshooting .
ProCarManuals.com

SRS Indicato r Ligh t Wir e Connection s
SRS Indicato r Ligh t Powe r Circui t
To UNDER-DAS HFUSE/RELAY BO X
18 P CONNECTO R
To GAUG E ASSEMBL Y
DASHBOAR D WIR E HARNES S
SRS Indicato r Ligh t Contro l Circui t
To SR S UNI T
SRS MAI N HARNES S
C801
To UNDER-DAS H
FUSE/RELA Y BO X
2 P CONNECTO R
C421
C427
C60 1
C42 1 : MAI N WIR E HARNES S 3 P CONNECTO R C80 1 : SR S MAI N HARNES S 2 P CONNECTO R
C42 7 : MAI N WIR E HARNES S 16 P CONNECTO R C80 2 : SR S MAI N HARNES S 3 P CONNECTO R
C60 1 : DASHBOAR D WIR E HARNES S 16 P CONNECTO R C80 5 : SR S MAI N HARNES S 18 P CONNECTO R
C60 3 : DASHBOAR D WIR E HARNES S 18 P CONNECTO R
C61 5 : DASHBOAR D WIR E HARNES S 5 P CONNECTO R
C615
C802
MAIN WIR E HARNES S
C805
DASHBOARD WIR E
HARNES S
C615C60 3
To GAUG E ASSEMBL Y
ProCarManuals.com

4. Remove the airbags:

Driver's Side:

Remove the two Torx bolts using a Torx T30 bit, then

remove the driver's airbag.

DRIVER'S

AIRBAG

CRUISE

CONTROL

SET/RESUME

SWITCH

TORX BOLTS

Use a Torx T30 bit.
Front Passenger's Side:

Remove the four mounting nuts from the bracket.

Remove the bracket and one mounting nut, then lift

the front passenger's airbag out of the dashboard.

NOTE: The lid of the airbag has pawls on its side which

attach it to the dashboard. To remove the airbag, cover

the lid and dashboard with a cloth, and pry carefully

with a flat tip screwdriver.

FRONT PASSENGER'S

AIRBAG

BRACKET

BRACKET

MOUNTING NUTS

FRONT PASSENGER'S

AIRBAG

MOUNTING NUTSProCarManuals.com

17. Tighten the steering wheel bolt to the specified

torque. Then install the driver's airbag.

TORX BOLTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit.

STEERING WHEEL BOLT

38 N-m (3.9 kgf-m, 28 Ibf-ft)
DRIVER'S

AIRBAG

18. Attach the cable reel 2P connector to the connector

holder. Then install the dashboard lower cover.

CONNECTOR

HOLDER

CABLE REEL

2P CONNECTOR

SRS
MAIN

HARNESS

DASHBOARD LOWER COVER
19. Reconnect the driver's airbag 2P connector to the

cable reel 2P connector, and reinstall the access

panel on the steering wheel.

20. Reconnect the battery positive cable, then the nega-

tive cable.

21. After installing the cable reel, confirm proper sys-

tem operation:

Turn the ignition ON (II); the SRS indicator light

should come on for about six seconds and then

go
off.

Make sure both horn buttons work.

Make sure the headlight and wiper switches

work.

Go for a test drive, and make sure the cruise con-

trol switches work.

22. Enter the anti-theft code for the radio, then enter the

customer's radio station presets.ProCarManuals.com

SRS Uni t
Replacemen t
CAUTION:
Durin g installatio n o r replacement , d o no t bum p
(impac t wrench , hamme r etc. ) th e are a nea r th e SR S
unit .
D o no t damag e th e SR S uni t terminal s o r connec -
tors.
Do no t disassembl e th e SR S unit ; i t ha s n o service -
abl e parts .
Stor e th e SR S uni t i n a clean , dr y area .
D o no t us e an y SR S uni t whic h ha s bee n subjecte d
t o wate r damag e o r show s sign s o f bein g droppe d o r
improperl y handled , suc h a s dents , crack s o r defor -
mation .
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 prese t buttons .
2 . Disconnec t th e batter y negativ e cable , the n discon -
nec t th e positiv e cabl e fro m th e battery , an d wai t a t
leas t thre e minutes .
3 . Disconnec t th e airba g connectors .
Driver' s Side :
Remov e th e acces s pane l fro m th e steerin g wheel ,
the n disconnec t th e 2 P connecto r betwee n th e driver' s
airba g an d cabl e ree l (se e pag e 24-11 ).
Fron t Passenger' s Side :
Remov e th e glov e box .
Disconnec t th e connecto r betwee n th e fron t passen -
ger' s airba g an d SR S mai n harness . O n a '9 6 model ,
connec t th e shor t connecto r t o th e fron t passenger' s
airba g connector .
FRONT PASSENGER' S
AIRBA G
CONNECTO R
SRS MAI N HARNES SCONNECTO R
4. Remov e th e radi o pane l (se e sectio n 23 ).
5 . Remov e th e cente r consol e an d dashboar d cente r
trim.
DASHBOAR D CENTE R TRI M
CENTE R
CONSOL E
6. Disconnec t th e SR S mai n harnes s 18 P connecto r fro m
th e SR S
unit .
7. Remov e th e fou r Tor x bolt s fro m th e SR S unit , the n
pull th e SR S uni t ou t o f th e dashboard .
TORX BOLT S
Us e a Tor x T3 0 bit .
SRS MAI N HARNES S18P CONNECTO R TOR
X BOLT SUse a Tor x T3 0 bit .
ProCarManuals.com

8. Install the new SRS unit.

TORX BOLTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Use a Torx T30 bit.

Replace.

SRS MAIN HARNESS

18P CONNECTOR

TORX BOLTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Use a Torx T30 bit.

Replace.

9. Connect the SRS main harness 18P connector to the

SRS unit, then push it into position until it clicks.

10. Reinstall the radio panel bracket and radio panel

assembly.

11. Reinstall the dashboard center trim and center con-

sole.
12. Reconnect the driver's airbag 2P connector to the

cable reel 2P connector, and reinstall the access

panel on the steering wheel.

13. Reconnect the front passenger's airbag connector

to the SRS main harness, then reinstall the glove

box.

14. Reconnect the battery positive cable, then the nega-

tive cable.

15. After installing the SRS unit, confirm proper system

operation: Turn the ignition switch ON (II); the SRS

indicator light should come on for about six sec-

onds and then go off.

16. Enter the anti-theft code for the radio, then enter the

customer's radio station presets.ProCarManuals.com

Description

The automatic transmission is a combination of a 3-element torque converter and a dual-shaft electronically controlled

automatic transmission which provides 4 speeds forward and 1 reverse. The entire unit is positioned in line with the engine.

Torque Converter, Gears and Clutches

The torque converter consists of a pump, turbine and stator, assembled in a single unit.

They are connected to the engine crankshaft so they turn together as a unit as the engine turns.

Around the outside of the drive plate is a ring gear which meshes with the starter pinion when the engine is being started.

The entire torque converter assembly serves as a flywheel while transmitting power to the transmission mainshaft.

The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in line with the engine

crankshaft.

The mainshaft includes the 1st, 2nd and 4th clutches, and gears for 4th, 2nd, 1st and reverse (3rd gear is integral with the

mainshaft, while the reverse gear is integral with 4th gear).

The countershaft includes the 3rd, and 1st-hold clutches, and gears for 3rd, 4th, 1st, 2nd, reverse, and parking. The sec-

ondary drive gear is integrated with the countershaft.

The gears on the mainshaft are in constant mesh with those on the countershaft.

When certain combinations of gears in the transmission are engaged by clutches, power is transmitted from the mainshaft

to the countershaft to provide and positions.

Electronic Control

The electronic control system consists of the Transmission Control Module (TCM), sensors, a linear solenoid and four

solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions.

The TCM is located below the dashboard, behind the glove box on the passenger's side.

Hydraulic Control

The lower valve body assembly includes the main valve body, the servo body and the shift control solenoid valves. They

are bolted on the lower part of the transmission housing.

Other valve bodies, the regulator valve body, the ATF pump body, the 2nd accumulator body, and the throttle valve body,

are bolted to the torque converter housing.

The main valve body contains the manual valve, the 1 - 2 shift valve, the 2 - 3 shift valve, the 3 - 4 shift valve, the 4th kick-

down valve, the 2 - 3 orifice control valve, the 3 - 4 orifice control valve, the 4th exhaust valve, the servo control valve,

and the main orifice control valve.

The servo body contains the servo valve, 3rd and 4th accumulator pistons.

The regulator valve body contains the regulator valve, the lock-up shift valve, and the cooler relief valve.

Fluid from the regulator passes through the manual valve to the various control valves.

The throttle valve body includes the throttle valve which is bolted onto the 2nd accumulator body. The 2nd accumulator

piston is assembled in the 2nd accumulator body.

The linear solenoid is joined with the throttle valve body.

The ATF pump body contains the modulator valve, the lock-up control valve, the lock-up timing valve, and the relief valve.

The torque converter check valve is located in the torque converter housing under the ATF pump body.

The 1st and 1st-hold accumulator pistons are assembled in the rear cover.

The clutches receive fluid from their respective feed pipes or internal hydraulic circuit.

Shift Control Mechanism

Input from various sensors located throughout the vehicle determines which shift control solenoid valve the TCM will acti-

vate. Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes

a line to one of the clutches, engaging that clutch and its corresponding gear.

Lock-up Mechanism

In position, in 2nd, 3rd and 4th, and in position in 3rd, pressurized fluid is drained from the back of the torque con-

verter through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place,

the mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the TCM optimizes the

timing of the lock-up mechanism. The lock-up valves control the range of lock-up according to lock-up control solenoid

valves A and B, and throttle valve. When lock-up control solenoid valves A and B activate, the modulator pressure changes.

The lock-up control solenoid valves A and B are mounted on the torque converter housing, and are controlled by the TCM.ProCarManuals.com