1999 HONDA CIVIC Tire

Valve Body
2.
Repair
NOTE: This repair is only necessary if one or more of
the valves in a valve body do not slide smoothly in their
bores. You may use this procedure to free the valves in
the valve bodies.
1. Soak a sheet of #600 abrasive paper in ATF for
about 30 minutes.
Carefully tap the valve body so the sticking valve
drops out of its bore.
CAUTION: lt may b€ necessary to use a small
screwdriver to pry the valve free. Be careful not to
scratch the bore whh the screwdriver.
Inspect the valve for any scuff marks. Use the ATF-
soaked #600 paper to polish off any burrs that are
on the valve, then wash the valve in solvent and dry
it with compressed a ir.
Roll up half a sheet of ATF-soaked paper, and insert
it in the valve bore of the sticking valve.
Twist the paper slightly, so that it unrolls and fits the
bore tightly, then polish the bore by twisting the
paper as you push it in and out.
CAUTION: The valve body is aluminum and doesn't
require much polishing to remove any burrs,
3.
4.
ATF-soaked#600 abrasive Paper
5.
7.
Remove the #600 paper and thoroughly wash the
entire valve body in solvent. then dry it with com-
pressed air.
Coat the valve with ATF, then drop ir into its bore.
It should drop to the bonom of the bore under its
own weight. lf not, repeat step 4, then retest.
VALVE BODY
Remove the valve. then thoroughly clean it and the
valve body with solvent. Dry all parts with com-
pressed air. then reassemble using ATF as a lubri
cant.
W
-M
14-139

Description
The Continuously Variable Transmission (CVT) is an electronically controlled automatic transmission with drive and driv
en Oullevs, and a steel belt. The CVT provides non stage speeds forward and one reverse. The entire unit is positioned in
line with the engine.
Transmission
Around the outside of the flywheel is a ring gear which meshes with the starter pinion when the engine is being staned.
The transmission has four parallel shafts: the input shaft, the drive pulley shaft. the driven pulley shaft, and the secondary
gear shaft. The input shaft is in line with the engine crankshaft. The drive pulley shaft and the driven pulley shaft consist of
movable and fixed face pulleys. Both pulleys are linked by the steel belt.
The input shaft includes the sun gear. The drive pulley shaft includes the forward clutch which mounts the carrier assem-
bly on the forward clutch drum. The carrier assembly includes the pinion gears which mesh with the sun gear and the ring
gear. The ring gear has a hub-mounted reverse brake disc.
The driven pulley shaft includes the start clutch and the secondary drive gear which is integral with the park gear' The sec-
ondary gear shaft is positioned between the secondary drive gear and the final driven gear. The secondary gear shaft
includes the secondary driven gear which serves to change the rotation direction. because the drive pulley shaft and the
driven oullev shaft rotate the same direction. When certain combinations of planetary gears in the transmission are
engaged by the clutches and the reverse brake, power is transmitted from the drive pulley shaft to the driven pulley shaft
to provide E, E, E, and El.
Electronic Control'96 - 98 Models:
The electronic control system consists of the Transmission Control Module (TCM), sensors, three linear solenoids, and a
inhibitor solenoid. Shifting is electronically controlled under all conditions'
The TCM is located below the dashboard, behind the kick panel on the driver's side.'99 - 00 Models:
The electronic control svstem consists of a Powertrain Control Module (PCM), sensors, three linear solenoids and an
inhibitor solenoid. Shifting is electronically controlled under all conditions. A Grade Logic Control System to control shift-
ing in E position while the vehicle is ascending or descending a slope.
The PCM is located below the dashboard, under the kick panel on the passenger's side.
Hydraulic Control
The lower valve body assembly includes the main valve body, the Pressure Low (PL) reguiator valve body, the shift valve
body, the start clutch control valve body, and the secondary valve body. They are positioned on the lower part of the
transmission housing.
The main valve body contains the Pressure High (PH) control valve, the lubrication valve, and the pitot regulator valve.
The secondary valve body contains the PH regulator valve, the clutch reducing valve, the start clutch valve accumulator,
and the shift inhibitor valve. The PL regulator valve body contains the PL regulator valve and the PH-PL control valve
which is ioined to the PH,PL control linear solenoid. The inhibitor solenoid valve is bolted on the PL regulator valve body.
The shift valve body contains the shift valve and the shift control valve. which is joined to the shift control linear solenoid.
The start clutch control valve body contains the start clutch control valve, which is joined to the start clutch control linear
solenoid. The linear solenoids and the inhibitor solenoid are controlled by the TCM or PCM. The manual valve body which
contains the manual valve and the reverse inhibitor valve, is bolted on the intermediate housing.
The ATF pump assembly is located on the transmission housing, and is linked with the input shaft by the sprockets and
the sprocket chain. The pulleys and the clutch receive fluid from their respective feed pipes, and the reverse brake receives
fluid from internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the vehicle determines which linear solenoid the TCM or PCM will activate.
Activating the shift control linear solenoid changes the shift control valve pressure, causing the shift valve to move. This
pressurizes the drive pulley pressure to the drive pulley and the driven pulley pressure to the driven pulley and changes
their effective pulley ratio. Activating the start clutch control linear solenoid moves the start clutch control valve. The start
clutch control valve uncovers the port, providing pressure to the start clutch to engage it(cont'd)
14-195
,!

Troubleshooting
General Troubleshooting
Check the following before you begin:. Has the suspension been modified in a way that would affect steering?. Are tire sizes, tire variety and air pressure correct?. lsthe steering wheel original equipment or equivalent?. lsthe powersteering pump belt properlyadiusted?
. ls steeringfluid reservoirfilledto proper level?. ls the engine idle speed correct and steady?
Hard Steering (Check the powor assist. se€ page 17-3o. lfthe torce is over 29 N (3.0 kgf, 6.6lbo, Procede with this troubleshootinq.)
Abnormallluid pressure
{fluid pressureis too high)
Faulty valve body unit
Relief pres-sure too low
Abnormal
Faulty llow control valve(Replace the pump es anassembly)
Ch€ck the feed snd return circuit lin€s ano nosebetw6€n the gearbox and pump for clogging andd€lormation.
Normal line and hose
Check the pump fluid pressure(soe page 17-34).l/easure steady-state tluid pres-s!re while idling with the bothvalves tully open.It should be 1.500 kPa (15 kgf/cmr,213 psi) or below.
Normal
Check th€ flow control vslve (see page 17-42).. Chock the valvo lor smooth movement in the hous-ing.. Check the reliefvalve for leaks.
Check the pump fluid pressure
{see page 17-34).Measure pump relief pressurewhile idling with the pressure con-trol valve Iully closed.It should be 6,400 - 7,400 kPa (65 -
75 kgflcm,,920 - 1,070 psi)
Normal relisf pressure
17-22
Go to page 17-23Faulty pump assembly

Inspection and Adjustment
Steering Operation
Place the front wheels in the straight ahead position,
and measure the distance the steering wheel can beturned without moving the front wheels.
ROTATIONAL PLAY: 0 - 10 mm l0 - 0.39 inl
lf the play exceeds the service limit. perform rack guide
adjustment (see page 17-33).
lf the play is still excessive after rack guide adjustment.inspect the steering linkage and gearbox as describedon the nel(t pag€.
ROTATIONAL PLAY
17-30
Power Assist Gheck with
Vehicle Parked
1. Check the power steering fluid level (see page 17-33) and pump belt tension (see page 17-32).
2. Start the engine, allow it to idle. and turn the steer-ing wheel from lock-tolock several times to warm
up the fluid.
3. Attach a spring scale to the steering wheel. With theengine idling and the vehicle on a clean, dry floor,pull the scale as shown and read it as soon as thetires begin to turn.
The scale should read no more than 29 N (3.0 kgf.
6.6 lbf). lf it reads more, check the gearbox andpump,
D0

I
14.
Apply power steering fluid to the surface of the spe-
cial tool. Set the new seal rings over the special tool
from the smaller diameter end of the tool, and
expand the seal rings. Do two rings at a time from
each end of the sleeve.
NOTE;
. Do not over-expand the seal ring. Installthe resin
seal rings with care so as not to damage them'
After installation, be sure to contract the seal
rings using the specialtool (sizing tool).
. There are two types of sleeve seal rings: black
and brown. Do not mix the different types of
sleeve seal rings as they are not compatible
Set the special tool in the grooves in the sleeve, and
set each ring in each groove securely.
NOTE: After installation, compress the seal rings
with your fingers temPorarilY
BALL JOINT BOOI CLIP GUIDE
07S7,1- SA50800
SLEEVE
15. Apply power steering fluid to the seal rings on the
sleeve, and to the entire inside surface of the spe-
cial tool.
16. lnsert the sleeve into the specialtool slowly'
17. Move the sleeve each direction several times to
make the seal rings snugly fit in the sleeve'
NOTE: Be surerings are not turned uP.
SITEVE SEAL RINGSIZING TOOL0797a - SA5020A or07974 - SA50200
that the seal
fr
J
17-57
18. Apply power steering fluid to the surface o{ the pin-
ion shaft. Assemble the sleeve over the pinion shaft
by aligning the locating pin on the inside of the
sleeve with the cutout in the shaft. Then install the
new circlip securely in the pinion shaft groove'
NOTE:
Be careful not to damage the valve seal ring
when inserting the sleeve.
Installthe circlip with its radiused side toward the
sleeve.
Apply power steering fluid to the seal ring lip of the
valve oil seal. then install the seal in the valve hous-
ing using a hydraulic press and special tools as
shown.
CAUTION: Install the valve oil seal with its grooved
side facing the tool.
'19.
ATTACHMENT.32x35mm0774.6 - q)101(x)Pre3s
IDRIVER07749 - 0010000
VALVE OIL SEALReplace.Make sure thespring is in the
oil seal. (cont'd)

Wheel Alignment
,f,
Caster
NOTE: For proper inspection/adjustment of the wheel
alignment check and adjust the following before check-
ing the alignment.
. Check that the suspension is not modified.
. Check the tire size and tire pressure.
. Check the runout of the wheels and tires.
. Check the suspension ball ioints. {Hold a wheel with
your hands and move it up and down and right and
left to check for wobbling.)
Inspection
NOTE: Use commercia lly-available computerized four
wheel alignment equipment to measure wheel align-
ment {caster. camber, toe, and turning angle). Follow
the equiDment manufacturer's instructions.
Check the caster angle.
Caster angle: 1',10' I 1'
lf out of specification, check for bent or damaged
suspensron components.
2.
1.
18-4
Camber
lnspection
NOTE: Use commercially-available computerized four
wheel alignment equipment to measure wheel align-
ment (caster, camber, toe, and turning angle). Follow
the equipment manufacturer's instructions.
1. Check the camber angle.
Camber angle:
Front: 0'00' j 1"
Rear:-1"11"
2. lf out ol specification, check for bent or damaged
suspensron components.

?
Front Toe Inspection/Adiustment
NOTE: Use commercially-available computerized four
wheel alignment equipment to measure wheel align-
ment (caster, camber, toe, and turning angle). Follow
the equipment manufacturer's instructions.
1. Check the tire pressure.
Center steering wheel spokes.
Check the toe with the wheels pointed straight
a head.
Front toe: lN 1 1 2 mm llN l/16 r 1/16 inl
- lf adjustment is required, go on to step 4.
- lf no adjustment is required, remove alignment
equrpmenr.
Loosen the tie-rod locknuts, and turn both tie-rods
in the same direction until the front wheels are in
straight ahead position.
TIE.ROD LOCKNUT'14 x 1.5 mm
4.
tJ
6.
Turn both tie-rods equally until the toe readang on
the turning radius gauge is correct.
After adjusting, tighten the tie-rod locknuts.
NOTE: Reposition the tie-rod boot if it is twisted or
displaced.
4,1 N.m {4.5 kgf.m, 33 lb{.ft)
2.
Rear Toe Inspection/Adiustment
NOTE: Use commercially-available computerjzed Iour
wheel alignment equjpment to measure wheel align-
ment (caster, camber, toe, and turning angle). Follow
the equipment manufacturer's instructions.
1. Release parking brake.
NOTE:
a Measure difference in toe measurements wlth
the wheels pointed straight ahead.
. if the parking brake is engaged, you may get an
incorrect readang,
Rear toe-in: 2 11 mm ttltollllS int
- lf adjustment is required, go to step 2.
- lf no adjustment is required, remove alignment
equipment.
Before adjustment, note the locations of adiusting
bolts on the right and left compensator arms
Loosen the adjusting bolts, and slide the compen
sator arm in or out. as shown, to adjust the toe
ADJUSTING BOLT10 x 1.25 mm
In CoMPENSAToR ARM
4. Tighten the adiusting bolts
. Example:
After the rear toe inspection, the wheel is 2 mm
(0.08 in) out of the specification.- Move the arm so the adjusfing bolt moves 2 mm
(0.08 in) inward trom the position recorded before the
adjustment.- The distance the adjusting bolt is moved should be
equal to the amount out-of-specification.
64 N.m 16.5 ksf m, 47 lbtft)
18-5

Anti-lock Brake System (ABSI
Featu res/Construction
When the brake pedal is depressed during driving, the wheels can lock before the vehicle comes to a stop, In such a case,the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is reduced if therear wheels are locked, creating an extremely unstable condition. The ABS precisely controls the slip rate of the wheels toensure the grip force of the tires. and it thereby ensures the maneuverbility and stability of the vehicle.Judging the vehicle speed. the ABS calculates the slip rate of the wheels based on the vehicle speed and the wheel speed,then it controls the brake fluid pressure to attain the target slip rate.
Grip Force of Tire and Road Surlace
COEFFICIENT OFFRICTION
TARGET SLIP RATE
Slip Rate
BRAKINGSTART POINT
ROTATIONALDIRECTION
RADIALDIRECTIONOF THEROTATIONALOIRECTION
A: Distance without slio8: Slippsd distanceC: Actuel distance
sr-rrmre=f=SLIP RATEVEIIICLE SPEED - WHEEL SPEEOVEHICLE SPEED
19-46