1995 ACURA TL ESP

54. Selec t th e 4 4 m m shim(s) .
NOTE : Onl y reinstal l th e origina l 4 4 m m shim(s )
when th e steerin g gearbo x i s reassemble d withou t
replacin g th e pinio n shaft , valv e housing , an d gear -
bo x housin g wit h ne w ones .
If th e pinio n shaft , valv e housing , an d gearbo x
housing ar e replaced , selec t th e ne w shim(s ) a s fol -
lows .
Shi m selection :
a . Se t th e fou r 4 4 m m shim s o n th e bearin g surfac e o f
th e gearbo x housing . Tota l thicknes s o f th e fou r
shim s shoul d equa l n o mor e tha n 0.7 0 mm .
Shi m set : fou r 4 4 m m shim s (Thickness : 0.1 0 mm ,
0.1 5 mm , 0.2 0 mm , 0.2 5 m m respectively )
CAUTION : Th e fou r 4 4 m m shim s d o no t hav e thick -
nes s identificatio n marks . Measur e th e thicknes s o f
eac h shi m usin g a micrometer , an d mar k th e shi m
fo r identification .
b. Instal l th e valv e bod y uni t o n th e gearbox , an d
tighte n th e flang e bolt s t o th e specifie d torque .
SHIM SET(fou r shims )
c.Measur e th e clearanc e betwee n th e gearbo x an d
valv e bod y uni t usin g a feele r gaug e a s shown .
NOTE : Measur e th e clearanc e a t th e poin t midwa y
betwee n th e tw o mountin g bolts .
FEELE R GAUG E
d. Determin e th e require d thicknes s o f th e 4 4 m m
shim s b y subtractin g th e clearanc e obtaine d i n th e
ste p - 3 fro m th e tota l thicknes s o f th e fou r shims .
(Tota l thicknes s o f th e 4 shims ) - (Clearance ) =
Require d thicknes s o f th e shim s
NOTE : Selec t th e shim s s o tha t th e tota l thicknes s
is clos e to , bu t les s tha n th e require d thickness .
Example:
Measuremen t i s 0.2 8 m m (0.01 1 in) :
0.7 0 - 0.2 8 = 0.4 2 m m (0.02 8 - 0.01 1 = 0.01 7 in )
Th e selecte d shim s shoul d b e 0.2 5 m m (0.01 0 in ) an d
0.1 5 m m (0.00 6 in ) i n thickness .
I f th e require d shi m thicknes s i s 0.1 0 m m o r less , n o
shim s ar e necessary .
55 . Se t th e selecte d 4 4 m m shim s o n th e bearin g sur -
fac e o f th e gearbo x housing .
FLANGE BOL T20 N- m (2. 0 kgf-m , 1 4 Ibf-ft )
44 m m SHIM S(Selecte d numbe r o f
shims )
56. Coa t th e ne w O-rin g wit h grease , an d carefull y fi t i t
o n th e valv e housing .
57 . Appl y greas e t o th e needl e bearin g i n th e gearbo x
housing .
58 . Instal l th e valv e bod y uni t o n th e gearbo x housin g
b y engagin g th e gears .
NOTE : Not e th e valv e bod y uni t installatio n posi -
tio n (directio n o f pip e connection) .
59 . Tighte n th e flang e bolt s t o th e specifie d torque .
VALVE BOD YUNITFLANG E BOL T
2 0 N- m (2. 0 kgf-m , 1 4 Ibf-ft )
NEEDLE BEARIN G
O-RIN
G
Replace .
VALVE BOD Y UNI T
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Anti-lock Brake System (ABS)

Features/Construction

In a conventional brake system, if the brake pedal is depressed very hard, the wheels can lock before the vehicle comes to

a stop. In such a case, the stability of the vehicle is reduced if the rear wheels are locked, and maneuverability of the vehi-

cle is reduced if the front wheels are locked, creating an extremely unstable condition.

The Anti-lock Brake System (ABS) modulates the pressure of the brake fluid applied to each front caliper or both rear

calipers, thereby preventing the locking of the wheels, whenever the wheels are likely to be locked due to hard braking. It

then restores normal hydraulic pressure when there is no longer any possibility of wheel locking.

The ABS equipped on this car is compact, with its hydraulic control system incorporated into one modulator unit. It is a

3-channel anti-lock brake system that has individual control of the front wheels and common control ("select low") for the

rear wheels. "Select low" means that the rear wheel that would lock first (the one with the lowest resistance to lock-up)

determines anti-lock brake system activation for both rear wheels.

ABS CONTROL UNIT

GEAR PULSER

MASTER CYLINDER

MODULATOR UNIT

REAR WHEEL SENSOR

GEAR PULSER
FRONT WHEEL SENSOR

PART NAME

Gear pulser

Wheel sensor

ABS control unit

Modulator unit

Motor Relay

Fail-safe relay
MAJOR FUNCTION

Attached to the rotating part of the wheel and detects the wheel speed together with the

wheel sensor.

Generates pulse signal corresponding to the revolution of the gear pulser.

Controls the working of the anti-lock brake system by performing calculations based on the

signals from the individual wheel sensors and the individual switches.

• Adjusts the hydraulic pressure applied to each caliper on the basis of the signals received

from the ABS control unit.

• Pump, accumulator, solenoid valves, pressure switch and pistons are integrated in the mod-

ulator unit.

Controls the ABS pump motor's power supply according to the signal from the ABS control unit.

Cuts off the solenoid valve ground circuit when the fail-safe device is at work.ProCarManuals.com

Wire Harnes s Replacemen t
1. Remov e th e modulato r uni t fro m th e ca r (se e pag e
19-117 ).
2 . Remov e th e modulato r uni t cover , an d remov e th e
wir e harness .
MODULATO R UNI T
SOLENOI D CONNECTO R
SET PLAT E
MODULATO R UNI T COVE R
WIRE HARNES S
3. Chec k th e number s stampe d o n th e se t plate , an d
connec t eac h connecto r o f th e ne w wir e harnes s t o
th e se t plat e o f th e correspondin g number .
NOTE : B e sur e tha t eac h connecto r i s locke d securel y
wit h th e tw o lockin g tabs .
NUMBER S(Stamped )
CONNECTO R
SET PLAT E
4. Instal l th e modulato r uni t cove r an d modulato r uni t
(se e th e previou s page) .
5 . Chec k th e AB S functio n usin g th e AL B checke r (se e
page 19-112 ).
Pum p Moto r Replacemen t
The modulato r uni t contain s high-pressur e
brak e fluid . B e sur e to blee d th e high-pressur e flui d fro m
th e modulato r uni t befor e removin g th e pum p motor .
1 . Blee d th e high-pressur e brak e flui d fro m th e modu -
lato r uni t (se e pag e 19-115 ).
2 . Remov e th e modulato r uni t fro m th e ca r (se e pag e
19-117 ).
3 . Remov e th e 8 m m flang e bolt s fro m th e modulato r
unit , an d remov e th e pum p motor .
MODULATO R UNI T
O-RIN GReplace .PUMP MOTO R
8 m m FLANG E BOL TReplace .NOTE: Us e 8 m m bolt sin th e pum p moto r set .15 N- m (1. 5 kgf-m , 1 1 Ibf-ft )
4. Instal l th e pum p moto r i n th e revers e orde r o f removal .
NOTE:
After installin g th e modulato r unit , ad d fres h
brak e flui d unti l th e reservoi r i s refille d t o th e spe -
cifie d level , an d blee d ai r fro m th e syste m (se e
page 19-115 ).
Tur n th e ignitio n switc h o n (II) ; an d chec k fo r th e
AB S indicato r ligh t operation .
ProCarManuals.com

Rear Windo w
Remova l (cont'd )
4. Remov e th e clips , the n remov e th e lowe r cover .
NOTE : Us e a cli p remove r t o remov e th e clips .
REARWINDO W
CLIP
LOWE R COVE R
5. Remov e th e molding .
NOTE : I f th e moldin g remova l i s difficul t t o remove ,
cut i t wit h a knife .
MOLDIN G
REAR WINDO W
MOLDING
6. Appl y protectiv e tap e t o alon g th e edg e o f th e bod y
a s shown . Usin g a s awl , mak e a hol e throug h th e
rubbe r da m an d adhesiv e fro m insid e th e car . Pus h
a piec e o f pian o wir e throug h th e hole , an d wra p
eac h en d aroun d a piec e o f wood .
PIANO WIR E
ADHESIV E
REAR WINDO W
PROTECTIV ETAPE
PROTECTIV ETAPEPROTECTIV ETAPE
RUBBE RDAM
ADHESIV E
7.Wit h a helpe r o n th e outside , pul l th e pian o wir e
back an d fort h i n a sawin g motion , an d carefull y cu t
throug h th e rubbe r da m an d adhesiv e aroun d th e
entir e rea r window .
CAUTION : Hol d th e pian o wir e a s clos e t o th e rea r
windo w a s possibl e to preven t damag e to th e body .
REARWINDO W
8. Carefull y remov e th e rea r window .
PIANO WIR ESPACE R
GLASS
ADHESIV E
PIANOWIRE
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Troubleshooting
Self-diagnosis Functio n
The climat e contro l uni t ha s a self-diagnosi s function .
Runnin g th e Self-diagnosi s Functio n
Tur n th e ignitio n switc h O N (II) , the n pres s bot h th e AUT O an d OF F button s a t th e sam e time . Whil e th e button s ar e
pressed , indicato r light s A , B , C , D , E an d F respectivel y wil l com e o n to indicat e a fault y component .
AUTO BUTTO NOFF BUTTO N
A
B
C
D
E
F
Indicator
ON
OF F
Componen t wit h proble m
In-car temperatur e senso r
Outsid e ai r temperatur e senso r
Sunligh t senso r
Evaporato r temperatur e senso r
Ai r mi x contro l moto r
Blowe r moto r Possibl
e caus e
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Ope n o r shor t circuit , obstructe d door ,
fault y moto r
Ope n o r shor t circuit , fault y moto r Se
e pag e22-1 2
22-1 4
22-16
22-1 8
22-2 0
22-22 or 22- 24
(2.5L),
NOTE : I n cas e o f multipl e problems , th e respectiv e indicato r light s wil l com e on . I f indicato r light s A , B , C , D , an d E com e
o n a t th e sam e time , ther e ma y b e a n ope n in th e commo n groun d wir e o f th e sensors .
Resettin g th e Self-diagnosi s Functio n
Turnin g th e ignitio n switc h OF F wil l cance l th e self-diagnosi s function . Afte r servic e work , ru n th e self-diagnosi s functio n
onc e agai n to chec k tha t ther e is n o othe r problem.
D E F A, B , C
22-6a (3.2L)
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Troubleshooting

Tips and Precautions (cont'd)

Insert the connector all the way and make sure it is

securely locked.

Position wires so that the open end of the cover faces

down.

Face

open end

down

Handling Wires and Harnesses

Secure wires and wire harnesses to the frame with

their respective wire ties at the designated locations.

Remove clips carefully; don't damage their locks.

Slip pliers under the clip base and through the hole at

an angle, then squeeze the expansion tabs to release the

clip.

SNAP-RING PLIERS

After installing harness clips, make sure the harness

doesn't interfere with any moving parts.

Keep wire harnesses away from exhaust pipes and

other hot parts, from sharp edges of brackets and

holes, and from exposed screws and bolts.
Seat grommets in their grooves properly.

NOT GOOD

Testing and Repairs

Do not use wires or harnesses with broken insulation.

Replace them or repair them by wrapping the break

with electrical tape.

After installing parts, make sure that no wires are

pinched under them.

When using electrical test equipment, follow the

manufacturer's instructions and those described in

this manual.

If possible, insert the probe of the tester from the

wire side (except waterproof connector).

Use a probe with a tapered tip.

Refer to the instructions in the Honda Terminal Kit for

identification and replacement of connector termi-

nals.ProCarManuals.com

Ignition Syste m
Descriptio n
Ignition Timin g Control :
Th e programme d ignitio n (PGM-IG ) use d i n thi s engin e provide s optimu m contro l o f ignitio n timing . A microcompute r
determine s th e timin g i n respons e t o engin e spee d an d intak e ai r flo w mass . Th e inpu t signal s ar e transmitte d b y th e
TDC/CKP/CY P sensor , throttl e positio n (TP ) sensor , engine coolant temperatur e (ECT ) sensor , an d MA F sensor . Thi s sys -
tem , whic h i s no t dependen t o n a governo r o r vacuu m diaphragm , i s capabl e o f settin g lea d angle s wit h complicate d char -
acteristic s whic h canno t b e provide d b y conventiona l governor s o r diaphragms .
Basi c Control :
The contro l uni t ha s store d withi n it th e optimu m basi c ignitio n timin g fo r operatin g condition s base d upo n engin e spee d
and intak e ai r flo w mass . Wit h compensatin g signal s fro m sensors , th e syste m determine s optimu m ignitio n timin g an d
duratio n fo r ambien t condition s an d send s voltag e pulse s t o th e ICM .
Compensatio n of ignitio n timing :
Compensatio n Ite m
Idlin g
Compensatio n a t warm-u p
ECT compensatio n Relate
d Senso r an d Informatio n
TDC/CKP/CY P senso r
MAF senso r
ECT senso r
ECT senso r
Descriptio n
Ignition timin g i s controlle d t o th e targe t spee d
wit h compensatio n accordin g t o th e idlin g speed .
La g angl e is adjuste d accordin g t o warm-u p con -
dition s t o brin g abou t a goo d balanc e betwee n
operating performanc e an d exhaus t ga s level .
Compensatio n fo r lea d angl e a t lo w engin e
coolan t temperatur e an d la g angl e a t hig h engin e
coolan t temperature .
Control a t Start :
Ignitio n timin g is fixe d a t 5 ° BTD C fo r cranking . Th e crankin g is detecte d b y th e TD C senso r (crankin g rpm ) an d starte r signal .
ProCarManuals.com

Description

The cruise control system uses mechanically and electri-

cally operated devices to maintain vehicle speed at a

setting selected by the driver.

The cruise control unit receives command signals from

the cruise control main switch and the cruise control

set/resume/cancel switch. It receives information about

operating conditions from the brake switch, ECM, vehi-

cle speed sensor (VSS), or the A/T gear position switch.

The cruise control unit sends operational signals to the

devices that regulate the throttle position. The throttle

position maintains the selected vehicle speed.

Essentially, the control unit compares the actual speed

of the vehicle to the selected speed. Then, the control

unit uses the result of that comparison to open or close

the throttle.

The brake switch releases the system's control of the

throttle at the instant the driver depresses the brake

pedal. The switch sends an electronic signal to the con-

trol unit when the brake pedal is depressed; the control

unit responds by allowing the throttle to close. The A/T

gear position switch sends a disengage signal input to

the control unit that also allows the throttle to close.
Operation:

The cruise control system will set and automatically

maintain any speed above 25 mph (40 km/h). To set a

speed, make sure that the main switch is in the "ON"

position. After reaching the desired speed, press the set

switch. The cruise control unit will receive a set signal

and, in turn, will actuate the cruise control actuator. If

you depress the set switch is when the cruise control

system is on, the "cruise light", an indicator in the

gauge assembly, will come on. You can cancel the

cruise control system by depressing the cancel switch or

by pushing the main switch to "OFF". This removes

power to the control unit and erases the set speed from

memory. If the system is disengaged temporarily by the

brake switch or the A/T gear position switch and vehicle

speed is still above 25 mph (40 km/h), press the resume

switch. With the resume switch depressed and the set

memory retained, the vehicle will automatically return

to the previous set speed.

For gradual acceleration without depressing the acceler-

ator pedal, push the resume switch down and hold it

there until the desired speed is reached. This will send

an acceleration signal to the control unit. When the

switch is released, the system will be reprogrammed for

the new speed. To slow the vehicle down, depress the

set switch. This will send a deceleration signal to the

control unit, causing the vehicle to coast. When you

reach the desired speed, release the set switch. This will

reprogram the system for the new speed.ProCarManuals.com