check engine ACURA TL 1995 Service Service Manual

DTC Indication Pattern (When the ABS control unit detected a problem three times.):

Turn the ignition

switch ON (II)

ABS

Indicator

light on

ABS

Indicator

light off
DTC:
4-2

Main Coda: 4

Sub-Code: 2

Connect the

SCS service

connector
2 Second Second

pause pause
5 Second

pause
1

Second

pause
5 Second

pause
1

Second

pause

2 Seconds

• Turn the ignition switch ON (II). The ABS indicator light comes on for two seconds to check the bulb.

• The ABS control unit indicates the DTC three times.

• If you miscount the blinking frequency or if you recheck the blinking frequency, turn the ignition switch OFF then

turn it ON (II) to cycle the ABS indicator light again.

4. Remove the SCS service connector.

NOTE: The Malfunction Indicator Lamp (MIL) will stay on after the engine is started if the SCS service connector is

connected.

5. Remove the ABS B2 (15 A) fuse in the under-hood fuse/relay box for at least three seconds to erase the ABS control

unit's memory.ProCarManuals.com

Electronic Component s
Steering Angl e Senso r Replacemen t
CAUTION: D o no t damag e o r dro p th e steerin g angl e senso r a s it i s sensitive .
1 . Remov e th e combinatio n switc h (refe r t o sectio n 1 7 in th e '9 5 - '9 8 Acur a 2.5T L servic e manual , P/ N 61SW504) .
2 . Remov e th e circli p an d screw , the n remov e th e steerin g angl e senso r fro m th e combinatio n switch .
3 . Installatio n i s i n th e revers e orde r o f removal .
CAUTION : D o no t appl y an y greas e o r oi l t o th e steerin g angl e sensor .
4 . Perfor m th e steerin g angl e senso r syste m check . SCRE W
STEERING ANGL E SENSO R
COMBINATIO N SWITC H
CANCE L CA M
WAV E WASHE R
SPRING
LOWER COVE R
NOTE: Whe n reassembling , alig n th e tab s o f th e join t an d
cance l ca m to th e sli t o f th e steerin g angl e sensor .
Steering Angl e Senso r Syste m Chec k
1. Star t th e engine .
2 . Pus h th e TC S switc h thre e time s withi n thre e seconds .
NOTE: Alway s maintai n th e sam e numbe r o f rotations .
3. Slowl y tur n th e steerin g whee l fro m clockwis e mor e tha n 1. 5 turns .
NOTE :
• Star t checkin g afte r th e steerin g whee l move s a t leas t 1. 5 turns .
• Tur n th e steerin g whee l slowly , n o faste r tha n on e tur n in fou r seconds .
4 . Pus h th e TC S switc h twic e withi n thre e seconds .
NOTE : Alway s maintai n th e sam e numbe r o f rotations .
5 . Slowl y tur n th e steerin g whee l counterclockwise , an d chec k th e numbe r o f time s th e TC S indicato r ligh t flashe s afte r
th e whee l ha s move d approximatel y on e turn .
NOTE :
• Star t countin g afte r th e steerin g whee l move s on e turn .
• Tur n th e steerin g whee l slowly , n o faste r tha n on e tur n i n fou r seconds .
Standar d numbe r o f time s th e TC S indicato r ligh t flashes : 2 time s ('9 6 model )
: 4 time s ('9 7 model )
6 . I f ther e is a n abnormality , chec k th e troubleshooting flowchart (se e pag e 19-126 ).
JOIN T
CIRCLI P
ProCarManuals.com

Troubleshooting

Radiator Fan Control Module Input Tests

NOTE: Perform the following tests with the radiator fan control module 8P connector connected, the ignition switch ON (II),

and the A/C switch OFF. If you find the cause of a problem, correct it before you continue.

RADIATOR FAN CONTROL MODULE 8P CONNECTOR

WIRE SIDE OF FEMALE TERMINALS

Terminal

No.

4

6

7

2

3

1

8

5
Wire

color

BLK

WHT/GRN

BLK/YEL

BLK/YEL

YEL/WHT

YEL

LT

GRN/YEL

ORN
Test condition

Check for voltage to body

ground.

Check for battery voltage:

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Connect to body ground:

Ignition switch - ON (II)

Check for voltage.
Desired results

There should be less

than one volt.

There should be battery

voltage.

Condenser fan and radia-

tor fan should come on.

Approx. 11 V (engine oil

temperature below 198°F

[92°C])
Corrective action if desired results are

not obtained

Repair open to body ground.

Check No. 56 (10 A) fuse in the under-

hood fuse/relay box; if OK, repair open

in the WHT/GRN wire.

Check No. 4* fuse in the under-dash

fuse/relay box; if OK, repair open in the

BLK/YEL wire.

Check No. 7 (7.5 A) fuse in the under-

dash fuse/relay box; if OK, repair open in

the BLK/YEL wire.

Replace the radiator fan control module.

Before you connect the new radiator fan

control module, disconnect both fan

relays. Check for continuity between the

YEL/WHT (or YEL) wire and ground, using

the 20 scale on your ohmmeter. There

should be no continuity. If there is conti-

nuity, the new radiator fan control mod-

ule will be damaged when you connect it.

Check for an open in the LT GRN/YEL

wire between the radiator fan control

module and the condenser fan relay or

the radiator fan relay. If OK, check for an

open in the YEL/WHT wire between the

radiator fan control module and the radi-

ator fan relay, or the YEL wire between

the radiator fan control module and the

condenser fan relay. If OK, test the con-

denser fan relay or the radiator fan relay.

Faulty engine oil temperature switch,

short to body ground, or faulty radiator

fan control module.

*No. 4 (15 A):'96 model

No. 4 (20 A): '97 and '98 modelsProCarManuals.com

Check for Wear and Damage

The starter should crank the engine smoothly and steadily.

If the starter engages, but cranks the engine erratically,

remove it, and inspect the starter drive gear and torque

converter ring gear for damage.

• Check the drive gear overrunning clutch for binding

or slipping when the armature is rotated with the

drive gear held. If the clutch is damaged, replace the

clutch assembly.

Check Cranking Voltage and Current Draw

Cranking voltage should be no less than 8.0 volts.

Current draw should be no more than 450 amperes.

If cranking voltage is too low, or current draw too high,

check for:

Dead or low battery

Open circuit in starter armature commutator segments

Starter armature dragging

Shorted armature winding

Excessive drag in engine

Check Cranking rpm

Engine speed during cranking should be above 100 rpm.

If speed is too low, check for:

Loose battery or starter terminals

Excessively worn starter brushes

Open circuit in commutator segments

Dirty or damaged helical spline or drive gear

Defective drive gear overrunning clutch

Check Starter Disengagement

With the shift lever in or , turn the ignition switch to

"START (III)", and release to "ON (II)". The starter drive

gear should disengage from the flywheel ring gear when

you release the key.

If the drive gear hangs upon the flywheel ring gear, check

for:

• Solenoid plunger and switch malfunction

• Dirty drive gear assembly or damaged overrunning

clutchProCarManuals.com

44. Disconnect the vacuum hoses, then remove the front

engine mounts.

VACUUM

HOSE
FRONT

ENGINE

MOUNT

45. Slowly raise the hoist up a little.

46. Remove the mid mounts.

MID MOUNT SPACER

MID MOUNTS
47. Remove the transmission housing mounting bolts

and the torque converter cover, then separate the

engine and the transmission.

Attach the transmission jack with a rubber pad or a

wooden block to protect the transmission housing.

Remove this bolt

after separating

the transmission

from the engine.
TRANSMISSION

HOUSING

MOUNTING

BOLT

DOWEL PIN

TORQUE CONVERTER

COVER

TRANSMISSION HOUSING

MOUNTING BOLT

48. Reinstall the mid mounts to the transmission and

retorque the mounting bolts.

49. Raise the chain hoist to remove all slack from the

chain.

50. Check that the engine is completely free of vacuum

hoses, fuel and coolant hoses and electrical wiring.

51. Slowly raise the engine approximately 150 mm (6 in).

Check once again that all hoses and wires are discon-

nected from the engine.

52. Raise the engine all the way up, and remove it from

the vehicle.ProCarManuals.com

Engine Moun t Contro l Syste m
Troubleshootin g Flowchar t
NOTE:
• Chec k th e vacuu m hose s an d pipe s fo r damag e an d prope r connections .
• Refe r t o pag e 11-2 8 throug h 11-3 1 befor e troubleshooting .
The engin e vibrate s exces -
sivel y whe n idling .
Chec k Idl e Speed :
War m u p engin e t o norma l oper -
atin g temperatur e (th e coolin g fa n
come s on) .
I s th e idl e spee d les s tha n
80 0 rpm ?
Chec k th e Engin e Moun t Contro l
System :
1 . Full y depres s th e brak e pedal .
2 . Wit h th e transmissio n i n gear ,
hav e a n assistan t connec t an d
disconnec t th e 2 P connecto r
fro m th e engin e moun t contro l
solenoi d valve .
I s ther e a noticeabl e chang e in
idl e smoothnes s whe n th e 2 P
connecto r i s connecte d an d
disconnected ?
Tes t th e Engin e Moun t Contro l
Solenoi d Valv e Wire :
1. Shif t t o o r position .
2 Disconnec t th e 2 P connecto r
from th e engin e moun t con -trol solenoi d valve .
3 . Measur e voltag e betwee n th e
BLK/YE L wir e an d bod y ground .
I s ther e batter y voltage ?
Tes t th e Engin e Moun t Contro l
Solenoi d Valv e Wire :
Measur e voltag e betwee n th e BLK /
YE L wir e an d th e GRN/WH T wire . Adjus
t th e idl e spee d (se e pag e
11-117 ).
Reconnec t th e 2 P connecto r t o
th e solenoi d valve . Th e engin e
moun t contro l syste m is OK . ENGIN
E MOUN T CONTRO L
SOLENOID VALV E CONNECTO R
Repair ope n i n BLK/YE L wir e
betwee n th e 2 P connecto r an d
th e EC M fus e ('9 5 - '96 : 1 5 A , '9 7
- '98:2 0 A) .
TERMINA L SID E O F FEMAL ETERMINAL S
Is ther e batter y voltage ?
(T o pag e 5-19 ) —
Repai r ope n in GRN/WH T wir e
betwee n EC M (A10 ) an d th e 2 Pconnector .— If th e wir e i s OK , substitut e a
known-goo d EC M an d recheck .
ProCarManuals.com

(From pag e 5-18 )
Tes t th e Engin e Moun t Contro l
Solenoi d Valv e Wire :
1 . Rais e th e engin e spee d abov e
1,000 rpm .2. Measur e voltag e betwee n th e
BLK/YE L wir e an d th e GRN /
WHT wire .
ENGIN E MOUN T CONTRO LSOLENOID VALV E CONNECTO R
Is ther e batter y voltage ?
Tes t th e Engin e Moun t an d
Vacuu m Hose :
1 . Tur n th e ignitio n switc h OFF ,
the n disconnec t th e uppe r
vacuu m hos e fro m th e engin e
moun t contro l solenoi d valve ,
an d connec t a vacuu m pump /
gaug e t o th e hose .
2 . Star t th e engine , the n appl y
vacuu m fo r 2 0 seconds .
Doe s th e engin e moun t hol d
vacuum ?
Test th e Engin e Mount :
Releas e th e vacuum , the n appl y
vacuu m again .
I s ther e a noticeabl e chang e in
idl e smoothnes s wit h an dwithou t vacuu m applied ?
Tes t th e Engin e Moun t Contro l
Solenoi d Valve :
1 . Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e lowe r vacuu m
hos e fro m th e engin e moun t
contro l solenoi d valve , an d
connec t a vacuu m gaug e to th e
hose .3. Star t th e engine .
I s ther e manifol d vacuum ? Repai
r shor t t o bod y groun d
i n GRN/WH T wir e betwee n
ECM (A10 ) and th e 2 P con -nector .If th e wir e i s OK , substitut e a
known-goo d EC M an d recheck .
— Replac e th e vacuu m hose .
— Replac e th e engin e mount . TERMINA
L SID E O F FEMAL E
TERMINAL S
ENGINE MOUN TCONTRO L SOLENOI DVALVE
UPPER VACUU MHOSE
Replac e th e engin e mount . VACUU
M PUMP /
GAUGE , 0-3 0 in.Hg .
A973 X - 04 1 - XXXX X
ENGIN E MOUN T
CONTRO L SOLENOI D
VALVE
Repair a s needed . VACUU
M PUMP /
GAUGE , 0-3 0 in.Hg .
A973 X - 04 1 - XXXX X
LOWERVACUU MHOSE
Replac e th e engin e moun t con -
tro l solenoi d valve .
ProCarManuals.com

Cylinder Head

Installation (cont'd)

14. Apply liquid gasket to the head cover gasket at the

four corners of the recesses.

NOTE:

• Use liquid gasket. Part No. 08718 - 0001 or 08718

- 0003.

• Check that the mating surfaces are clean and dry

before applying liquid gasket.

• Do not install the parts if five minutes or more

have elapsed since applying liquid gasket. Instead,

reapply liquid gasket after removing old residue.

• After assembly, wait at least 30 minutes before

filling the engine with oil.

15.
Apply liquid gasket to

the shaded areas.

When installing the cylinder head cover, hold the

head cover gasket in the groove by placing your fin-

gers on the camshaft contacting surfaces (top of the

semicircles).

Once the cylinder head cover is on the cylinder

head, slide the cover slightly back and forth to seat

the head cover gasket.

NOTE:

• Before installing the cylinder head cover, clean

the cylinder head contacting surfaces with a

shop towel.

• Do not touch the parts where liquid gasket was

applied.

• Replace the washer when damaged or deterio-

rated.

• Reconnect the grounds cables to the cylinder

head cover.
16. Tighten the nuts in two or three steps. In the final step,

torque all nuts, in sequence, to 12 N-m (1.2 kgf-m, 8.7

Ibf-ft).

NOTE:

• Be sure to wipe any liquid gasket off the surface

of the No. 7 camshaft holder where the distribu-

tor is to be attached.

• After assembly, wait at least 30 minutes before

filling the engine with oil.

17. After installation, check that all tubes, hoses and

connectors are installed correctly.

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

customer's radio station presets.

CYLINDER HEAD

COVER

WASHERProCarManuals.com

Main Bearings

Clearance

1. To check main bearing-to-journal oil clearance,

remove the main caps and bearing halves.

2. Clean each main journal and bearing half with a

clean shop towel.

3. Place one strip of plastigage across each main jour-

nal.

NOTE: If the engine is still in the car when you bolt

the main cap down to check clearance, the weight

of the crankshaft and flywheel will flatten the plasti-

gage further than just the torque on the cap bolt

and give you an incorrect reading. For an accurate

reading, support the crankshaft with a jack under

the counterweights and check only one bearing at a

time.

4. Reinstall the bearings and caps, then torque the

bolts.

1st step: 29 N-m (3.0 kgf-m, 22 Ibf-ft)

Final step: 74 N-m (7.5 kgf-m, 54 Ibf-ft)

NOTE: Do not rotate the crankshaft during inspec-

tion.

5. Remove the caps, and bearings again, and measure

the widest part of the plastigage.

Main Bearing-to-Journal Oil Clearance:

Standard (New): 0.018 - 0.048 mm

(0.0007 - 0.0019 in)

Service Limit: 0.053 mm (0.0021 in)

6. If the plastigage measures too wide or too narrow,

remove the crankshaft, and remove the upper half

of the bearing. '95 and '96 only: Install a new, com-

plete bearing with the same color (select the color

as shown in the right column of this page), and

recheck the clearance.

CAUTION: Do not file, shim, or scrape the bearings

or the caps to adjust clearance.

7. If the plastigage shows the clearance is still incor-

rect, try the next larger or smaller bearing (the color

listed above or below that one), and check again.

NOTE: If the proper clearance cannot be obtained

by using the appropriate larger or smaller bearings,

replace the crankshaft and start over.ProCarManuals.com

Pistons

Installation

Before installing the piston, apply a coat of

engine oil to the ring grooves and cylinder

bores.

1. If the crankshaft is already installed:

Remove the connecting rod caps and slip short

sections of rubber hose over the threaded ends

of the connecting rod bolts.

Install the ring compressor, check that the bear-

ing is securely in place, then position the piston

in the cylinder and tap it in using the wooden

handle of a hammer.

Stop tapping after the ring compressor pops

free, and check the connecting rod-to-crank jour-

nal alignment before pushing piston into place.

Install the rod caps with bearings, and torque the

nuts to 32 N-m (3.3 kgf-m, 24 Ibf-ft)

2. If the crankshaft is not installed:

Remove the rod caps and bearings, install the

ring compressor, then position the piston in the

cylinder and tap it in using the wooden handle of

a hammer.

Position all pistons at top dead center.

The arrow must face

the timing belt side

of the engine and the

connecting rod oil hole

must face the intake

manifold.

CONNECTING ROD

OIL HOLE

RUBBER HOSES

NOTE: Maintain downward force on the ring com-

pressor to prevent rings from expanding before

entering the cylinder bore.

Use the wooden handle

of a hammer to push, or

tap the piston into the

cylinder bore.
RING

COMPRESSOR

(Commercially

available)ProCarManuals.com