1995 ACURA TL ABS

Component Location s
ABS CONTRO L UNI TSERVIC E CHEC K CONNECTO R (2P )
STEERIN G ANGL E SENSO R RIGHT-REA
R WHEE L SENSO R
TCS CONTRO L UNI T
UNDER-DAS H RELA Y BO X
POWERTRAI N
CONTRO L MODUL E (PCM )
EC T SENSO R
TC S CONTRO L VALV E
SENSO R
RIGHT-FRON T
WHEE L SENSO R
LEFT-REA RWHEEL SENSO R
TC S SWITC H
UNDER-DAS H FUSE/RELA Y BO X
UNDER-DAS H FUSE/RELA Y BO X
GAUG E ASSEMBL Y
TC S INDICATO R LIGH T
UNDER-HOO D FUSE/RELA Y BO X BACK-U
P LIGHTS /
METE R LIGHT S
(1 0 A ) FUS E EC
U (PCM)/CRUIS E
CONTRO L
(1 5 A ) FUS E
BATTER Y (120A ) FUS E
UNDER-DASH RELA Y BO X
I G S W (5 0 A ) FUS E
FAIL-SAF E RELA Y
TCS CONTRO L
VALV E ACTUATO R
UNDER-HOO D FUSE/RELA Y BO X
LEFT-FRON
T WHEE L SENSO R
TCS/RUNNIN GLIGHT (1 5 A ) FUS ESTOP/HOR N(20 A ) FUS E
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System Descriptio n
Outline
Role o f Syste m
Th e tractio n contro l i s a variabl e syste m designe d t o enhanc e tractio n durin g acceleratio n an d cornering . I t doe s s o b y
determinin g th e optimu m amoun t o f whee l spi n fo r an y give n drivin g situation , the n suppressin g surplu s engin e powe r
accordingly .
Constructio n an d Functio n
The TC S contro l uni t get s signal s abou t th e vehicle' s speed , direction , an d roa d condition s fro m sensor s a t th e wheel s an d
the steerin g column . Base d o n thes e signals , th e contro l uni t wil l determin e th e optimu m amoun t o f whee l spin . Becaus e
th e syste m is variable , th e contro l uni t ma y determine , dependin g o n th e drivin g conditions , tha t som e whee l spi n i s bene -
ficia l (thu s enhancin g straight-lin e acceleration) , o r tha t n o whee l spi n i s beneficia l (thu s enhancin g cornering) . Fo r an y
give n drivin g situation , th e contro l uni t wil l determin e th e amoun t o f whee l spi n bes t suite d t o th e driver' s need s and , i f
necessary , wil l the n signa l th e TC S contro l valv e actuato r an d Powertrai n Contro l Modul e (PCM ) t o reduc e engin e power .
Th e syste m is automaticall y "ready " wheneve r th e engine is started , bu t ca n b e manuall y cancele d wit h th e TC S switch .
However , onc e activated , th e syste m canno t b e cancele d unti l i t i s onc e agai n i n th e read y state .
SERVIC E CHEC K CONNECTO R (2P )ABS CONTRO L UNI TTCS CONTRO L UNI TUNDER-DAS H RELA Y BO X
POWERTRAI N
CONTRO L MODUL E (PCM )
EC T SENSO R
TC S CONTRO L VALV E
ANGL E SENSO R STEERIN
G ANGL E SENSO R
RIGHT-REA R WHEE L SENSO R
RIGHT-FRON T
WHEE L SENSO R
Components :
• Whee l sensors : Th e TC S "shares " th e whee l sensor s wit h th e ABS . Th e whee l sensor s transmi t whee l spee d signal s t o
th e TC S throug h th e AB S contro l unit .
• Steerin g angl e sensor : Th e steerin g angl e senso r signal s th e TC S contro l uni t abou t th e amoun t o f steerin g angle .
• TC S contro l valv e sensor : Th e TC S contro l valv e senso r signal s th e TC S contro l uni t abou t th e amoun t o f TC S contro l
valv e angle .
• TC S contro l valv e actuator : Th e actuato r get s signal s fro m th e TC S contro l uni t an d close s th e TC S contro l valv e
accordingly .
• TC S contro l unit : Th e TC S contro l uni t detect s th e drivin g conditio n signal s fro m th e sensor s and , i f necessary , signal s
th e Powertrai n Contro l Modul e (PCM) .
LEFT-REA RWHEEL SENSO R
UNDER-HOO D FUSE/RELA Y BO X
LEFT-FRON
T WHEE L SENSO R
TC
S CONTRO L
VALV E ACTUATO R UNDER-DAS
H FUSE/RELA Y BO X
TC
S SWITC H
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Troubleshooting Precaution s
1. I n an y o f thes e cases , th e TC S indicato r ligh t ma y com e o n o r sta y o n eve n th e TC S syste m is normal .
• Th e coolan t temperatur e is 32° F (0°C ) o r below .
• Th e parkin g brak e is applie d fo r mor e tha n 3 0 second s whil e th e vehicl e is bein g driven .
• Th e tir e pressur e is no t a t th e specifie d pressure .
• Th e whee l senso r signa l i s interrupte d durin g drivin g a t th e spee d o f 6 mp h (1 0 km/h ) o r abov e du e to , fo r example ,
th e vehicl e spinning .
• Th e MA P sensor , coolan t temperatur e sensor , IC M o r th e atmospheri c pressur e senso r syste m o f th e PGM-F I syste m
is faulty .
2. TC S doe s no t functio n whe n th e TC S indicato r ligh t i s ON .
3 . Whe n bot h th e TC S indicato r ligh t an d th e MI L ar e ON , troubleshoo t th e PGM-F I syste m first .
4 . Whe n bot h th e TC S indicato r ligh t an d th e AB S indicato r ligh t ar e ON , troubleshoo t th e AB S first .
5 . Th e DT C 4- 9 (AB S down ) i s memorize d whe n th e AB S contro l uni t canno t outpu t th e whee l spee d signa l du e to , fo r
example , a missin g o r blow n AB S B 2 (1 5 A ) fuse . I f yo u fai l t o eras e th e DT C o f th e TC S afte r troubleshootin g th e ABS ,
th e DT C remain s in th e TC S contro l uni t memory . Therefore , b e sur e to test-driv e th e vehicl e an d chec k th e TC S indica -
to r ligh t befor e startin g th e troubleshootin g th e TCS .
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Front Bumper

Replacement

CAUTION: Wear gloves to remove and install the front

bumper.

NOTE:

An assistant is helpful when removing the front

bumper.

Take care not to scratch the front bumper and body.

Open the hood.

1. Remove the bolts and screw from each side.

FRONT BUMPER

INNER FENDER

2. Remove the clips. Remove the front bumper, then

disconnect the connectors.

FRONT SIDE

MARKER LIGHT

CONNECTOR

FRONT SIDE

MARKER LIGHT

CONNECTOR
B

FRONT TURN

SIGNAL LIGHT

CONNECTOR
FRONT TURN

SIGNAL LIGHT

CONNECTORS
3. Remove the absorber and front bumper lower spoiler

from the front bumper.

FRONT BUMPER

ABSORBER

FRONT BUMPER

LOWER SPOILER

4. Remove the front bulkhead cover.

NOTE: After pulling the inner clips out, remove the

front bulkhead cover with the clips.

FRONT BULKHEAD

COVER

CLIP

FRONT BULKHEAD

COVER
FRONT BUMPER
INNER

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8. I f necessary , remov e th e idle r pulley .
IDLER PULLE Y
9.
MOUNTIN G BOLT S
Check th e idle r pulle y bearin g fo r pla y an d drag .
Replac e it wit h a ne w on e i f it' s nois y o r ha s exces -
siv e pla y o r drag .
ADJUSTIN GBOLT
IDLE RPULLE YCENTE RBOLT
10 x 1.2 5 mm44 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
10. Instal l i n th e revers e orde r o f removal . Mak e not e o f
th e followin g items .
I f you'r e installin g a ne w compressor , drai n al l
th e refrigeran t oi l fro m th e remove d compressor ,
an d measur e it s volume . Subtrac t th e volum e o f
draine d oi l fro m 14 0 ( 4 1/ 3 fl-oz , 4. 9 Imp-oz) ;
th e resul t i s th e amoun t o f oi l yo u shoul d drai n
fro m th e ne w compresso r (throug h th e suctio n
fitting).
Replac e th e O-rings with ne w one s a t eac h fitting ,
an d appl y a thi n coa t of refrigeran t oi l befor e
installin g them .
NOTE : B e sur e t o us e th e righ t O-ring s fo r HFC -
134 a (R-134a ) t o avoi d leakage .
Us e refrigeran t oi l (ND-OI L 8 ) fo r R-134 a DENS O
pisto n typ e compressor s only .
T o avoi d contamination , d o no t retur n th e oi l t o
th e containe r onc e dispensed , an d neve r mi x i t
wit h othe r refrigeran t oils .
Immediatel y afte r usin g th e oil , replac e th e ca p
o n th e container , an d sea l i t t o avoi d moistur e
absorption .
D o no t spil l th e refrigeran t oi l o n th e vehicle ; i t
ma y damag e th e paint ; i f th e refrigeran t oi l con -
tact s th e paint , was h i t of f immediately .
B e carefu l no t t o damag e th e radiato r fin s whe n
installin g th e condense r fa n shrou d an d th e com -
pressor .
Adjust th e A/ C compresso r bel t (se e pag e 22-24 ).
Charg e th e syste m (se e pag e 22-30 ), an d tes t it s
performanc e (se e pag e 22-28 ).
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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A/C Service Tips and Precautions

The air
conditioner system uses
HFC-134a
(R-134a)
refrigerant
and
polyalkyleneglycol (PAG) refrigerant
oil*,
which
are not

compatible with CFC-12 (R-12) refrigerant and mineral oil. Do not use R-12 refrigerant or mineral oil in this system, and do

not attempt to use R-12 servicing equipment; damage to the air conditioner system or your servicing equipment will result.

*DENSO ND-OIL 8:

P/N 38897 - PR7 - A01AH: 120 (4 fl-oz, 4.2 Imp-oz)

P/N 38899 - PR7 - A01: 40 (1 1/3 fl-oz, 1.4 Imp-oz)

Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J2210 to remove R-134a

from the air conditioner system.

CAUTION: Exposure to air conditioner refrigerant and lubricant vapor or mist can irritate eyes, nose and throat. Avoid

breathing the air conditioner refrigerant and lubricant vapor or mist.

If accidental system discharge occurs, ventilate work area before resuming service.

R-134a service equipment or vehicle air conditioner systems should not be pressure tested or leak tested with compressed

air.

Some mixtures of air and R-134a have been shown to be combustible at elevated pressures and can result

in tire or explosion causing injury or property damage. Never use compressed air to pressure test R-134a service equip-

ment or vehicle air conditioner systems.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1. Always disconnect the negative cable from the battery whenever replacing air conditioning parts.

2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don't

remove the caps or plugs until just before you reconnect each line.

3. Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.

4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.

5. When discharging the system, use a R-134a refrigerant Recovery/Recycling/Charging System; don't release refriger-

ant into the atmosphere.

6. Add refrigerant oil after replacing the following parts:

NOTE:

To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refriger-

ant oils.

Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.

Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash

it off immediately.

Condenser ........................................ 25 (5/6 fl-oz, 0.9 Imp-oz)

Evaporator........................................ 50 (1 2/3 fl-oz, 1.8 Imp-oz)

Line or hose ...................................... 20 (2/3 fl-oz, 0.7 Imp-oz)

Receiver/Dryer
.................................
15
(1/2
fl-oz,
0.5
Imp-oz)

Leakage repair ................................. 25 (5/6 fl-oz, 0.9 Imp-oz)

Compressor ................................ For compressor replacement, subtract the volume of oil drained from the

removed compressor from 140 (4 1/3 fl-oz, 4.9 Imp-oz), and drain the calculated

volume of oil from the new compressor: 140 (4 1/3 fl-oz, 4.9 Imp-oz) — Volume

of removed compressor = Volume to drain from new compressor.

NOTE: Even if no oil is drained from the removed compressor, don't drain more

than 50 (1 2/3 fl-oz, 1.8 Imp-oz) from the new compressor.

REMOVED NEW

COMPRESSOR COMPRESSOR

SAME LEVEL

140 (4 1/3 fl-oz, 4.9 Imp-oz)
DRAINING

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General Info
Specifications
Maintenance
Engine
Cooling
Fuel and Emissions
2.5L
3.2L
* Transaxle
SteeringSuspension
* Brakes (Including ABS)
* Body
* Heating, Ventilation
and Air Conditioning
* Body Electrical
* Engine Electrical
* SRS2.5L
3.2L
1995±98 TL Main Menu
As sections w/ * include SRS components, special precautions are required when servicing.
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Engine Removal/Installation

Removal (cont'd)

7. Remove the battery cables from the under-hood fuse/

relay box.

BATTERY

CABLES

8.

9.
UNDER-HOOD

FUSE/RELAY BOX

Disconnect the engine wire harness connector on

the right (passenger's) side of the engine compart-

ment.

Remove the battery cable from the under-hood ABS

fuse/relay box.

BATTERY

CABLE

ENGINE WIRE

HARNESS

UNDER-HOOD ABS

FUSE/RELAY BOX
10. Remove the intake air duct and vacuum hose.

INTAKE AIR

DUCT

11.
VACUUM

HOSE

Remove the adjusting bolt, locknut and mounting

bolt, then remove the power steering (P/S) pump

belt and pump.

MOUNTING BOLT

10 x
1.25
mm

49 N-m (5.0 kgf-m, 36 Ibf-ft)

ADJUSTING

BOLT

P/S PUMP

BELT

LOCKNUT

8 x
1.25
mm

22 N-m (2.2 kgf-m,

16 Ibf-ft)ProCarManuals.com