Model HONDA CIVIC 1998 6.G Workshop Manual

Transmission
Reasembly
NOTE;
. Coat all parts with ATF.. Beplace the following parts:- O-rings- Lock washers- Gaskets- Mainshaft and countershaft locknuts and conical spring washers- Sealing washers
TOROUE: l2 N.m (1.2 ksf'm,8.7 lbf.ft)
6 x 'l.0 mm7 BoltsFEED PIPE: A
LOCK.UP VALVEBODY
LOCK.UP SEPARATORPLATE
REGULATOR VALVEBODY
DOWEL PINS. 2
6xl.0mm1 BoltATF STRAINERATF FEEDPIPES:
a
COOIER RELIEF VALVE
TOROUE CONVENIERCHECK VALVESTATOR SHAFT
O.RING
STOP SHAFT
ATF FEEO PIPE: H
5x1.0mm5 Bolts
DOWEL PINS.
MAIN VALVE BODY
ATF PUMP
SERVO SEPARATORPLAYE
6x1.0mm7 Bolts
SERVO BODY
SECONOARYSEPARATOR PLATE
CONTROL
GEAR SHAFT
ATF PUMP DFIVENGEAR
MAIN SEPARATORPLATE
DOWEL PINS,
/ SHAFI
' -
7r(
t'se - oo ^od"t"t
lli
triTOROUE CONVERTERHOUSING
NOTE: The illustration shows the'96 - 98 modsls, the'99 - 00 models do not have the servo detent base; the servodetent is integralwith the servo bodv.
14-176
L-

1.Install the ATF magnet and suction pipe collar in the
torque converter housing. if necessary.
lnstall the main seDarator plate and the two dowel
pins on the torque converter housang.
Install the ATF pump drive gear, ATF pump driven
gear and ATF pump driven gear shaft on the torque
converter housing.
NOTE; Install the ATF pump driven gear with its
grooved and chamfered side tacing down.
ATF PUMP
ATF PUMP DRIVENGEAR SHAFT
ATF PUMPDRIVEN GEAR
Grooved and chamferedside taces separalorplate.MAIN SEPARATORPLATE
4.Loosely install the main valve body with five bolts.
Make sure the ATF pump drive gear rotates smoothly
in the normal operating direction and the ATF pump
driven gear shaft moves smoothly in the axial and
normal operating directions.
Install the secondary valve body, separator plate
and two dowel pins on the main valve body.
NOTE: Do not installthe bolts.
6. Install the control shaft in the housing with the con-
trol shaft and manual valve together.
7. lnstall the detent arm and arm shaft in the main
valve body, then hook the detent arm spring to the
detent arm,
SERVO SEPARATOR PLATE
DETENT
MANUAL VALVE
DETENT ARM SPRING
15.
14-177
a
10.
11.
Install the servo body and separator plate on the
secondary valve body ('95 - 98 models: seven bolts.'99 - 00 models: eight boltsl.
For '96 - 98 models: Install the servo detent base
and the ATF strainer (two boltsl.
For'99 - 00 models: Install the ATF strainer (one
bolt).
Tighten the five bolts on the main valve body to 12
N.m ('1.2 kgf.m,8.7 lbf.ft).
Make sure the ATF pump drive gear and ATF pump
driven gear shaft move smoothlY'
lf the ATF pump drive gsar and ATF pump driven
gear shaft do not move freely, loosen ths five bolts
on the main valve body, and disassemble the valve
bodies.
Realign the ATF pump driven gear shaft and reassem-
ble the valve bodies, then retighten the bolts to the
specified torque,
CAUTION: Fsilule to align tho ATF pump driven
goar shaft corr.ctly will rscuh in a s€ized ATF pump
drive goar or ATF pump d ven gear shaft.
Install the stator shaft and stop shaft.
Install the bolts and the shaft stop on the secondary
valve body, then tighten the bolts (three boltsl.
Install the torque converter check valve, cooler relief
valve and valve springs in the regulator valve body.
then install the regulator valve body on the main
valve bodv (one bolt).
Install the lock-up valve body on the regulator valve
bodv (seven bolts).
Install the ATF feed pipes in the main valve bodY,
the three ATF feed pipes in the secondary valve and
the four ATF feed pipes in the servo body. (cont'dl
12.
't 3.
14.
PUMP

Continuously Variable Transmission (CVTI
Special Tools ................ 14-194
Description .................... 14-195
Clutches/Reverse Brake/Planetary
Gear/Pulleys .......... 14-198
power Flow ..............,..... 14-200
Electronic Control SYstem(,96 - 98 Modets) ......14-203
Electronic Control System
('99 - oo Models) " 14-205
Hydraulic Control '....... 14-208
Hydraulic Flow .'..-.....'... '14-212
Park Mechanism .....-...'.' 14-222
Eleqtrical Systom
Component Locations'96 - 98 Models """"""' 14-224,99 - 00 Modets ............. 14-225
TCM Circuit Diagram ('96 - 98 Models) ............. 14-226
TCM Terminal Voltage/Measuring Condiiions ('96 - 98 Models) '.... 14-228
PcM Circuit Oiaqram{A/T Control System: '99 - 00 Models} ...--.... 14-230
PCM Terminal Voltage/Measuring Conditions('99 - 00 Models)
A/4 Control System .'.'...14-232
Troubleshooting Procedures ... . .... .....',........."' '14-234
Symptom-to-ComPonent Chart
Electrical System - '96 - 98 Models ......'..... '14-234
Electrical System -'99 - 00 Models ..'....-..-. '11-210
Electrical Troubleshooting
Troubleshooting Flowcharts('96 - 98 Models) """'11-242
Troubleshooting Flowchart
('99 - 0O Modets) ...... 14-265
Linear Solenoids/lnhibitor Solenoid
Test ......................... . ...... 14-29f
Drive Pulley/Driven Pulley/Secondary Gear
Shaft Speed Sensors
Replacement .........'...... .14-292
Start Clutch Control
Start Clutch Calibration Procedure ....... ....,. 14-293
Hydraulic SYstem
Symptom-to-ComPonent Chart
Hydraulic System '.'.......14-294
Road Test ............................ 14-296
Stall Speed
Test......................... ...... 14-294
Fluid Level
Checking/Changing ....... 14-299
Pressure Testing ................. 14-300
Lower Valve BodY AssemblY
Replacement ..........,... 14-302
ATF Filter
Removal/lnstallation ..... 14-303
Transmission
Transmission
Removal ........... . 14-304
lllustrated Index
Transmission/Lower Valve BodY
Assembly ................. 14-308
Transmission Housing/Flywheel Housing ... 14-310
End Cover/f ntermediate Housing ..........'.'.... 14-312
Transmission Housing/Lower Valve Body Assembly
Removal ..........'.... .. " 14-314
Transmission Housing/Flywhesl Housing
Removal ................. ........ 1+316
End Cover/lntermediate Housing
14-318Removal .........,...............
Manual Valve Body
Disassembly/lnspection/Reassemblv .'.'.'..... 1 4-320
Forward Clutch
lltustrated Index ........................................ 14-321
Disassemblv .................. 14-322
Reassemblv , ,, . ',','......14-324
Secondary Gear Shaft
25 x 35 mm Thrust Shim Selection ..'.'....-... 14-324
Differential
lllustrated lndex ...,.....................,.,...-.-.-...'... 14-329
Backlash Inspection .-....14-329
Bearing Replacement ......'........'....'... ....'... 14-330
Differential Carrier Replacement ........'........ 14-330
Oil Seal Removal ........... 14-331
Oil Seal Installation/Side Clearance ....... . . 14-331
Flywheel Housing Input Shaft Oil Seal
Replacement .....,.... ...'.'.. 14-333
Transmission Housing Bearings
Driven Pulley Shaft Bearing
Replacenient ...................'. . ...................'.. 14-334
Secondary Gear Shaft Bearing
Reolacbment ...................... . .......... . ........ 14-335
Flywheel Housing Beating
Secondary Gear Shaft BearingReo1acement..................,........................... 14-335
Ring Gear Bearing
Replacement......... ........ 14-336
Control Shaft Assembly
Removal/lnstallation ....................'........... 14-336
Transmission
Reassembly .................. 14-338
Flywheel/Drive Plate .. . ...... . ...... ... . ....-.....'.'...14-341
Transmission
lnstalation ..................... 14-348
Cooler Flushing .'......... 14-352
shift cable
Removal/lnstallation....'........." """ 14-354
Adjustment .......'........ 14-355
Shift Lever ........................,. 14'356
Shift Indicator Panel
Adjustment ................ 14-357
ATF Cooler/Hoses
lnsta llation ......,,...... .... 14-357

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
,!

Electronic Control System ('96 - 98 Modelsl
The electronic control system consists of the Transmission control Module (TcM), sensors, three linear solenoids, and an
inhibitor solenoid. Shifting is electronically controlled under all conditions
The TCIM is located below the dashboard, behind the kick panel on the driver's side'
The TcN4 controls the transmission to reduce engine speed and retain the engine's cooling efficiency when the vehicle is
driven with Iull throttle acceleration
lf the vehicle is continuously driven at full throttle acceleration, the TCM regulates the pulley hydraulic pressure to
increase the pulley ratio, which, as the result. reduces the engine speed and retains the designed cooling efficiency After
the vehicle has been driven at a lower engine speed for a while, the TCM increases the pulley ratio to the original ratio.
For smooth starting in the E position, the TcM sends a signal to the EcM to cut off the rvc clutch {if the A!/c is on) and
increases the engine speed to 900 rpm when the transmission is shifted to the E position'
The start clutch functions to make smooth starting possible. To let the start clutch function properly. the TCM regulates
the start clutch hydraulic pressure based on the entine's negative pressure memorized in the E position'
:
:
z
z
z
S*ond.ry G..r Sh:ft
(cont'd)
14-203

Description
Electronic Control System ('gG - 98 Modelsl (cont'dl
Circuit Diagram and Terminal Locations
GNITIONSWITCN
Pri - Pt coNTnoLLrN ns0LtN0t0
SIAiT CLUTCH CONTSOLLINEAFSOLENOID
sHtFT CONmOILINIAftSOLENOID
BFAXELIGHT
PAS|(ING 8MI(E SWITCH
i\c-...............- +B
i\--------.--_ rcr
: MAP(PBIg s61
E rtDiRxo
g TM8
scs
123518I1011't22578910
14172023261213t4t6171820
D
14-204

Electronic Gontrol System ('99 - 00 Modelsl
The electronic controt system conststs 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'
fn"pCVirlocatedbelowthedashboard,underthekickpanelonthepassenger'sside'
The pCM controls the transmassion to reduce engine speed and retain the engine's cooling efficiency when the vehicle is
driven with full throftle acceleration
lf the vehicle is continuously driven at lull throttle acceleration, the PCM regulates the pulley hydraulic pressure to
increase the pulley ratio which. as the result, reduces the engine speed and retains the designed cooling efficiency After
the vehicle has been driven at a lower engine speed for a while, the PCM increases the pulley ratio to the original ratio'
i"i ".nl",rr starting in the E position, the PcM cuts off the ,Vc clutch (if the A/c is on) and increases the engine speed to
900 rpm when the transmission is shifted to the E position'
The start clutch functions to make smooth starting possible. To let the start clutch function properly, the PcM regulates
the start clutch hydraulic pressure based on the engine's negative pressure memorized in the E position'
FCM
s*o.d.ry G..t Sh.h
(cont'd)
14-205

Description
Electronic Control System ('99 - 00 Modelsl (cont'dl
Grade Logic Control System
How it works:
The PcM compares actual driving conditions with memorized driving conditions. based on the input from the vehiclespeed sensor, the throttle position sensor, the manifold absolute pressure sensor, the engine coolant temperature sensor,the brake switch signal, and the shift lever position signal, to control shifting while the vehicle is ascending or descendinga slope.
Ascending Control
When the PCM determines that the vehicle is climbing a hill in E position, the system selects the most suitable shiftschedule (pulley ratio) according to the magnitude of a gradient. so the vehicle can run smooth and have more powerwhen needed. There are three ascending modes with different shift schedules according to the magnitude ot a gradient inthe PCM.
Descending Control
when the PCM determines that the vehicle is going down a hill in E position. the system selects the most suitable shiftschedule (pulley ratio) according to the magnitude of a gradient. This, in combinstion with engine braking, achievessmooth driving when the vehicle is descending, There are three descending modes with different shift schedules accord-ing to the magnitude of a gradient in the PCM.
L
14-206

Circuit Diagram and Terminal Locations -'99 - 00 Models
IGN1TIONSWTCHPH.PLCOiTSOLLINEAF SOLEI€ID
SIAFT CLIJICH COTITROLLINEiF SOLET€IO
SHIFI CONTNOTLINEAR SOLEI{OIO
INNIB TOF SOLETIOIO
IGPl
vcc2TPS
14-207

Component Locations
36 - 98 Models
BRAKE SWITCH
DRIVEN PULLEYSPEED SENSOR
INHIBITOR SOLENOID
ENGINE CONTROLMODULE IECMI
SECONDARY GEAR SHAFTSPEEO SENSOR
AUTOMATIC TRANSAXLE (A/T}GEAR POSITION SWITCI{
MANIFOLD ABSOLUTE
VEHICLE SPEEO SENSOR{vss}
IMAPI SENSOR
THROTTI.I POSITION {TPISENSOR
PH.PL CONTROLLINEAR SOLENOID
/i/ i,' / ,','4
,i/:1
t"--.---.- i,,
-_,-:-_a.--:
il
START CLUTCH CONTROLLINEAR SOLENOIDPULLEY
SHIFT CONTROLLINEAR SOLENOTD
$r,
14-224
h
SPEED SENSOR