1998 HONDA CIVIC circuit

Electrical Troubleshooting ('gg - 00 Modelsl
From page 14-93
Measure CounteJahaft SpeedSensor Circuit tor an Open:1. Connect the countershaltspeed sensor connector,2. Measure the resistancebetween the Dl0 and D16 termtnats.
Roptir loo.€ t6.minal or opan inth6 wir€! betwo€n lho D10 lndD16 t.rmina13 and the count.r-shatt apaad aaNor.
ls the resistance 400 - 600 O?
Check for loose t.rminal frt in thePCM connectors. It necalsary,3ubstitute a known-good PCMand recheck.
Troubleshooting Flowchart - Countershaft Speed Sensor (cont,d)
PCM CONNECTOR D I16PI
Wire side of female terminals
\
14-94

Troubleshooting Flowchart - Mainshaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot.
Possible Causg
. Diaconn€cted mainshaft spoed
sen3or connector'Short or open in mainshaft
sDeed sen3or wile. Faulty main3halt speed sensor
NOTE: Code P0715 (15) on the PCM doesn't
always mean there's an electrrcal problem in
the mainshaft or countershaft speed sensor
circuit; code P0715 {15) may also indicate a
mechanical problem in the transmissjon Any
problem causing irregular countershaft to
mainshalt speed difference can cause thls
code.
lll ,..TT
(ol-i-l
tl
side oI male terminals
MAINSI{AFT SPEEDSENSOR CONNECTOR
Terminal
PCM CONNECTOR D (16P)
NMSG (WHT)
Wire side of female terminals
(cont'd)
14-95
. OBD ll Scan Tool indicates Codem715.. Sell-diagno3is E indicator indi-
cates Code 15.
Check the mainshaft and counter-
shatt speed sensors installation,
and check them for damage.
Are the mainshaft and countershaft
speed sensor installed properly,
and not damaged?
Rsinalall or replace and rocheck.
Mea3u.e Meinshalt SPeod
Sensor Residance al the Sen3or
Connector:1. Disconnect the 2P connectorfrom the mainshaft sPeedsensor.2, Nreasure mainshaft speed sen_sor resistance at the sensorconnector.
ls the resistance 400 - 600 O?
Check Mainshaft Sp.ed Sen3o.
for a Short Circult:1. Disconnect the D (16P) con-nector trom the PCM.2. Check lor continuity betweenbody ground and the D11 ter'minal and D12 terminal indi
vidually.
Bopair 3hort in the wiros b€twe€nthe 011 and D12 termin.ls rndth€ main3hett sp€€d aensoa.ls there continuity?
To page 14 96

Troubleshooting Flowchart - Linear Solenoid
NOTE: Record all freeze data before you troubleshoot.
Poitibl. Cau3.
. Disconnacted linoaJ tolanoidconnaclol. Shorl or opon in linolr solonoid
. Flulty linoar 3olenoid. ODon in VB SOL wit.. ODen in PG linoPCftI @NNECTORS
Wire side ol female terminals
PCM OONNECTOR B I25PI
LGT (BNN/BLKI LG2 {BBN/BLKI
Wir6 side of Iemale terminals
LINEAF SOITNOID OONNECTOR
Flr-11=T=T
olYI
L_l
Terminal side of mal€ termanals
(cont'd)
B t25Pl D {16P1
. OBD ll Scln Tool indic.t.t CodoP1768.. Self-diagnosis E indicltol indi-
cat6 Cods 16.
Moasur. VB SOL Voltago:1. Turn the ignition switch OFF.2. Disconnect the B {25P) and D(16P) connectors from thePCM.3. Turn the ignition switch ON (lll.
4. Measure the voltage between
the D5 and 820 or 822 termi-
nals.
Ropair opan or thort in dla wi.9hrw..n th. D5 t.rminrl .nd th.
und.r-d.rh fu ta/r.l.y box.
Ch.ck th. Ground Circuit:1. Turn the ignition switch OFF.2. Check lor continuity betwoenthe terminals 82 and 822 and
between terminals 810 and820.
Rapair opal| in tfr wi|! batlwaoth. tcrrnln.l. 82, B10, B:20. .ndBZI .id Gt01. R.p.ir poor ground
tG10rl.
M.!sure Linea. SolenoidRcai3tancc rt tha SolanoidConn6ctor:1. Disconnect the linearsolenoidconnectol,2. Measure the resistance of thelinear solenoid.
ls the resistance approx. 5 O?
To page 14-98
1+97

Electrical Troubleshooting ('99 - 00 Models)
Troubleshooting Flowchart - E Indicator Light Does Not Come On
FCM CONNECTOR B (25P}
LGl {8RN/ALKI{BRN/8LK}
Wire side ol temale terminals
LGl IBNN/BLK} LG2 {BRN/BLK)
i2t5 6q
910t7
LG2
o) (o
The Pll indicator light does notcome on when the ignitionswitch is fi.st turned ON (ll). lltshould come on for about twoseconda.l
Check the Service Check Con-nector:Make sure the special tool (SCS
Service Connector) is not connect-ed to the service check connector?
ls the specialtool {SCS ServiceConnector) is not connected tothe seNice check connector.
Disconnect the special tool fromthe service check connector andr6check.
Check the Dll lndicator LightiShift to d position.
Check for loose terminal fit in thePCM connecto13. It necessary.sub3titute a known-good PCMand recheck.
Does the @ indicator lightcome on?
Check the Ground Circuit:1. Turn the ignition switch OFF.2. Disconnect the B (25P) con-nector from the PCM.3. Check for continuity betweenthe 820 terminal and bodyground, and between the 822terminal and body ground.
Repair open in the wiresbetween the B20 rnd 822 termi-nals and ground (G101), andrep.ir poor ground (G1011.
Measure Power Supply CircuitVoltage:1. Turn the ignition switch ON {ll}.2. Measure the voltage betweenterminals B1 and 822 andbetween terminals Bg and820.
Repair open or short in the wi.obetween th6 81 and/or 89 termi-nals and the PGM-FI main relav,and between th€ PGM-FI mainr€ley rnd the under-hood tus€/relay box.
To page 14''103
14-102

From page 14-102
Measu.e D4 IND Voltago:1. Turn the ignition switch OFF.2. Connect the B (2SPiconnector
to the PCM.3. Connect a digital multimeter
to the A14 and 820 or 822 ter-
4. Turn the ignition switch ON (ll),
and make sure that voltage isavailable for two seconds.
Chock for ooon in tho witebetween the A't4 tsrminal .ndthe gauge.3s.mbly. ll wite i3OK, chock to. a t.ulty indicatorlight bulb or. feulty gaugc
e336mbly p.inted circuit board.
Check D4 IND lor a Short Citcuit:Check lor continuity between theA14 terminal and body ground.
Rop.ir short in thc wirg b€twoenth. Al4 tormin.l .nd tho gaugo
a$ombly. ll wiro is OK. chocktho gsugo a3rambly.
ls there continuity?
Check fo. loose terminal tit in thcPCM connectoB. Chock the A/Tgear position switch. It ncce3-sary, substitute a known-goodPCM and rechock.
PCM CONNECTORS
Wire side ol female terminals
14-103

ElectricalTroubleshooting ('99 - 00 Modelsl
Troubleshooting Flowchart - Brake Switch Signal
PCM CONNECTORS
Wire side of female terminals
Shift lever cannot be moved tromE position with tho b.ake pedaldepressod.
Check Brake Light Operation:Depress the brake pedal.
Repair t ulty brake switch circuit{see s€ction 23}.Are the brake llghts ON?
Mea3ure STOP SW Vohage:1. Turn the ignition switch OFF.2. Disconnect the A (32P) and B{25P} connectors from thePCM,3. Measure the voltage betweenthe A32 and 820 or 822 termi-nals with the brake pedal
depressed.
Repair open in the wire betwsenthe A32 terminal rnd tho brrk6switch.
ls there battery voltage?
. Brak€ switch sign.l is OK.. Check for loose terminal fil inlhe PCM conn€ctors. lf neces-sary. substitute a known-goodPICM and recheck.. InsDect the breke 3witch circuitlsee section 231.
B {25P)
\
14-104

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
,!