1998 HONDA CIVIC countershaft

Measure CounteFhaft Sp€€d S6n-
sor Resistance:1. Connect the countershaftspeed sensor 2P connector,2, Measure the resistancebetween the B23 and 822 telmtnals.
Repair looso terminal ol opon inthe wiro3 between th6 823 and822 terminal3 and the counter-shaft soeed aen3or.
ls the resistance 400 - 600 0?
Check tor loosc rcM connestors.ll nocessary, sub3titute a known-good PCM and recheck.
PCM CONNECTOR 8 I25PI
Wire side oI female terminals
14-69

Electrical Troubleshooting ('96 - 98 Modelsl
Troubleshooting Flowchart - Mainshaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot.
Po$ible Cause
. Disconnect€d mainshaft sD€edSensor @nnoctot. Short or open in mainshattsJt€ed s6nsoa wire. Faulty mainshaft lpeed s6nso.
NOTE: Code P0715 (15) on the PCMdoesn't always mean there's an electricalproblem in the mainshaft or countershaftspeed sensor circuit; code P0715 (15)may also indicate a mechanical problemin the transmission.
MAINSHAFT SPEEOSENSOR CONNECTOR
Terminal side of male terminals
PCM CONNECTOR B I25PI
. OBD ll Scan Tool indicates Codem715.. Self-dirgnosi3 E indicatorlight indicstes Code 15.
Check the mainshaft and counter-shaft speed sensor installation.
Are the mainshaft and countershaftspeed sensor installed properly?
Moasure Mainshaft Spoed SgnsolRosistance at the Sensor Con-n€ctor:1. Disconnect the 2P connectorfrom the mainshaft speed sen-sor connector.2. Measure the resistance ot themainshaft speed sensor.
ls the resistance 400 600 O?
Check Mainshaft Sp6ed Sensorfor a Short Circuil:1. Disconnect the B {25P) connec'tor lrom the PCM.2. Check for continuity betweenbody ground and 815 terminaland the 814 terminal individu,
Repai. shon in the wi.os bstwoenthe 815 and 814 te.minals andthe mainshatt .Dood 3ensor.
ls there continuity?
To page 14-71
14-70
Wire side of female terminals

Troubleshooting Flowchart - Countershaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot
Po$iblo Cause
. Loos€ or fsulty conneclionbetween the PCM and vehicle
hainoss' Disconnectod countersh.ft
spoed senaof connoctor. Short or opgn in counteBhaft
3Deed aensor wire. Faulty counloEhaft 3p€ed sen'
soa
COUNTERSHAFf SPEED
SENSOR CONNESTOR
Terminal side oI male terminals
FCM CONNECTOR D I16PI
rconl c
1+93
NC IBLUI
. OBD ll Scan Tool indicat6 Code
PO720.. Self-diagnosis E indicator light
blinks nin6times.
Check the countershaft sPeed
sensor installation, and check it
lor damage.
ls the countershaft speed sensor
installed properly, and not dam-
aged?
Reinstall or replace and rechock.
Measurg Counlershatt SPeed
Sgn3ol R6istance at tho Son3ol
Connector:1. Disconnect the 2P connector
from the countershaft sPeed
sensor.2, Measuro countershaft sPeed
sensor resistanca at the sensor
connector.
ls the resistance 400 - 600 O?
Chcck CounteEh.tt SPeed Sen'
sor lor a Short Circuit:1. Disconnect the D {16P) con
nector trom the PCM.2. Check lor continuity between
body ground and the D10 ter_
minal and D16 terminal indi-
vid!ally.
R6oai. short in tl|€ wi.6a bstwa€n
the D10 and D16 t.rminali end
tho countdthatt rP€od senaor.
To page 14 94
Wire side of temale terminals

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

Mai nshaft/Cou ntershaft
Linear Solenoid AssemblySpeed Sensors
Replacement
1. Remove the mounting bolts and the linear solenoid
assemory.
Clean the mounting surfaceand flu id passages.
6x1.0mm12 N.m 11.2 kgl m,8.7 tbf.ftl
@
@
GASKET
Clean the mounting surface and fluid passage of the
linear solenoid assembly and transmission housing.
Install a new linear solenoid assembly with a new
gasl(et.
NOTE; Do not pinch the gasket when installing the
linear solenoid; make sure that the gasket is installedproperly in the mounting groove of the linear sole-
noid.
Check the linear solenoid connector for rust, dirt or
oil, and connect it securely,
LINEARSOLENOIDASSEMELY
I
14-108
Replacement
't.
6x128.7
Remove the 6 mm bolt and the countershaft speed
sensor from the right side cover.
COUNTERSI{AFTSPEED SENSOR
O.RINGReplace.
MAINSHAFTSPEEDSENSOR
MAINSHAFT SPEEDSENSOB WAS}IER(D16Y7 enginel
6x1.0mm12 N.m (1.2 kgf m,8.7 tbf.ft)
1.0 mmN.m (1.2 kgf.m,rbf ft)
\\
/,
%/E:)
Remove the 6 mm bolt and the mainshaft sDeed
sensor from the transmission housino.
Replace the O-ring with a new one before installing
the countershaft speed sensor or th€ mainshaft speed
sensor.
NOTE: Installthe mainshaft speed sensor washer on
the mainshaft speed sensor. The mainshaft speed
sensor washer is used on models with the D'|6Y7
engine.

Symptom-to-Component Chart
Hydraulic System (cont'dl
G.
n,
set idle rpm in gear to specified idle speed. lf still no good, adjust motor mounts as outlined in enginesection of this manual.
lf the clutch pack is seized or is excessively worn. inspect the other clutches for wear, and check the orificecontrol valves, CPC valve and linear solenoid for free movement.
lf the linear solenoid is stuck, inspect the clutches for wear.
lmproper alignment or main valve body and torque converter housing may cause ATF pump seizure. Thesymptoms are mostly an rpm-related ticking noise or a high-pitched squeak.
lf the l st clutch feed pipe guide in the end cover is scored by the mainshaft, inspect the ball bearing forexcessive movement in the transmission housing. lf oK, replace the end cover as it is dented. The o-rinounder the guide is probably worn.
Replace the mainshaft if the bushing for the 4th feed pipe is loose or damaged. lf the 4th feed pipe is danFaged or out of round, replace the right side cover.
Replace the mainshaft if the bushing for the 1st feed pipe is loose or damaged. lf the 1st feed pipe is darn-aged or out of round, replace it.
A worn or damaged sprag clutch is mostly a result of shifting the transmission inthe wheels rotate in reverse, such as rocking the vehicle in snow.
or E position while
Inspect for damage and wear:
1. Reverse selector gear teeth chamfers.
2. Engagement teeth chamfers of countershaft 4th and reverse gear.
3. Shift fork for scuff marks in center.
4. Differential pinion shaft for wear u nder pin ion gears.
5. Bottom of 3rd clutch for swirl marks.
Replace items 1,2,3 and 4 if worn or damaged. lf transmission makes a clicking, grinding orwhirring noise,also replace mainshaft 4th gear, reverse idler gear. and countershaft 4th gear in addition to 1, 2, 3 or 4.lf differential pinion shaft is worn, overhaul differential assembly, and replace ATF strainer, and thoroughlyclean transmission, flush torque converter, cooler and lines.lf bottom of 3rd clutch is swirled and transmission makes gear noise, replace the countershaft and final drivengear.
Be very careful not to damage the torque converter housing when replacing the main ball bearing, you
may also damage the ATF pump when you torque down the main valve body. This will result in ATF pumpseizure if not detected. Use the oroper roors.
Install the main seal flush with the torque converter housing. lf you push it into the torque converterhousing until it bottoms out, it will block the fluid return passage and result in damage.
See flushing procedure, page 14-187 and 188.
lf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
lf the l-2 shift valve is stuck closed, the transmission will not upshift. lf stuck open, the transmission hasno 1st gear.
lf the znd orifice control valve is stuck. inspect the 2nd and 3rd clutch oacks for wear.
lf the 3-4 orifice control valve is stuck, inspect the 3rd and 4th clutch oacks for wear.
lf the clutch pressure control valve is stuck closed, the transmission will not shift out of 1st gear.
lf the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump and differentialpinion shaft. lf both are OK and no cause for the contamination is found, replace the torque converter.
Inspect the frame for collision damage.
14-112

Transmission
Removal
@Maks sure lifts, iacks and safety stands are placedproperly, and hoist bracket ate aftached to the cor_rec{ position on the engine lsee section 1).Apply parking brake and block rear whoels so vehiclewill not roll off stands and fall on you while workingunder it.
CAUTION: Use tender covers to avoid damaging paint-ed surfaces.
1, Disconnect the battery negative (_) terminal fromthe battery, then remove the positive (+) terminal.
2. Remove the intake air duct.
D16Y7 engins:
Remove the intake air duct and resonator.
D16Y8 engine:
Remove the intake air duct and the air cleaner hous-ing assembly,
3. Remove the starter cables and cable holder fromthe starter motor.
MOTOR CABLE
MOTOR CABLE
14-122
4. Remove the transmission ground cable, and discon_nect the lock-up control solenoid connector.
LOCK.UP CONTROLSOLENOID CONNECTOR
5, Disconnect the vehicle speed sensor (VSS) connec_tor and the countershaft speed sensor connector.
VEHICLE SPEED