1998 HONDA CIVIC Transmission

Description
Park Mechanism
The park mechanism locks the transmission by engaging the park pawl with the park gear which is integral with the sec-ondary drive gear' The secondary drive gear engages with the secondary driven gear which engages wit-h the final drivengear.
shifting to E position causes the park cone (installed at the end of the park rod) to press the park pawl onto the park gear.Even if the end of the park pawl rides on the top of the park gear teeth, slight movement of the vehicle will cause the parkpawl and the park gear to mesh with each other completely because the park cone receives the tension from the park rodspring The park pawl receives the tension (which acts to separate the park pawl from the park gear) from the park pawlspring.
PARK PAWI-
PARK CONE
START CLUTCH
PABK GEAR
PARK RODPARK PAWL
PARK ROOSPRING
14-222
D

TCM CONNECTOR B (22P}
Terminal NumbelSignalDescriptionMeasuring Conditions/Terminal Voltage
B1SOL INHInhibitor solenoid controlWith inhibitor solenoid ON: Baftery voltage
With inhibitor solenoid OFF: 0 V
82MAP (PB)-M an if old Absol r-rte Pressure IMAP)
sensor signal inPUtWith iqnition switch ON (ll): Approx.2.5 V
With e;gine adling: Approx. 1.0 V (depending on
engine speed)
B3Not used
B4TPS-Throttle Position (TP) sensor signal
input
With ignition switch ON (ll) and throftle fully open:
4.14 - 4.42 VWith ignition switch ON (ll) and throttle fully
closed: 0.44 - 0.56 V
VSSVehicle Speed Sensor (VSS) signal
Inpur
With ignition switch ON (ll) and rotating front
wheelsr 0-5Vcycle
TMBData communication with ECM:
Transmission control data outpUt
With ignilion swltch UN lll): rulslng slgnar
81TMAData communication with EClvl:
PGM Fl control data inPut
With ignition swltch uN {ll,: l-ulslng slgnal
B8NDN SGDriven pulley speed sensor ground
B9NDNDriven pulley speed sensor signal
input
ln other thTnE and E position: Pulsing signal
810NDRDrive pulley speed sensor signal
Input
-tn ottrer ttran E ana E position: Pulsing signal
811Not used
812STOP SWBrake switch signal inPutWith brake pedal depressed: Battery voltage
With brake pedal released: 0 V
813DIAG-H(TXD/RXD)Data communication:Diagnostic trouble code outPut
Wittr ignitio.r s*itct' ON (ll): Approx 5.0 V
814Se-ice ctrect signatWith ignition switch ON (ll) and service check
connector oPen: APProx.5 V
With iqnition switch ON (ll) and service check
"onn"itot. connect"d with special tool: 0 V
Secondary gear shaft speed sensor
signal input
Depending on vehicle speed: Pulsing signal
When vehicle is stoPped: 0 V815VEL
816VEL SGSecondary gear shaft speed sensorgrouno
817NDR SGDrive pulley speed sensor ground
818HBRK SWParking brake switch signal inPutWith parking brake lever pulledr 0 V
With parking brake lever released: Battery voltage
819Not used
B20VREF+5 V relerenceWith ignition switch ON (ll): Approx 5 V
821Not used
Not used

Troubleshooting Flowchart - Vehicle Speed Sensor (VSS)
NOTE: Record all freeze data before you troubleshoot'
Po$rible Ctuse
. Disconnected vehicle speed
sensor (VSS) connectol. Short or open in VSS wire' Faulty VSS
@. Make sure lifts, iacks, and sal€tY stands are placed properly lsoe section 1)'
. Set the parking brake securelv, and block the rear wheels'
. iacr upile rront or the vehicle, and support it with safety st'nds'
TCM CONNECTORS
Wire side of female terminals
. OBD ll Scan Tool indicates Code
P1791.. Setf-diagno3is E indicato. light
blinks tour times.
Refer to seclion 23 for vehicle
soeed sensor IVSSI test
Check the VSS Voltage:
1. Raise the vehicle2. Shift the transmission to lEposrtlon.3. Disconnect the A (26P) and B(22P) connectors from the
TCM.4. Turn the ignition switch ON {ll).
5. Rotate the front wheel and
check for the voltage between
the 85 and 413 or A26 termi-
nals. Block the other wheel so
at does not turn
Check for oP€n in the wire
between the 85 terminal and the
vehicle speed sensor {VSS}. lf
wire is OK, check the vSS (see
soction 23).
Does0Vandapprox 5 V or more
appear alternatelY?
Check for loos€ TCM connedors
lI nec€ssary, substitute a known'
good TCM and recheck.
14-243

Drive Pulley/Driven Pulley/Secondary Gear Shaft Speed
Sensors
Replacement
CAUTION: While replacing the speed sensor, be sure not to allow dust and other foreign parliclos to enter into the trans-mission.
'1. Disconnect the connectors for the drive pulley, the driven pulley, and the secondary gear shaft speed sensor.
2. Remove the 6 mm bolt from the transmission housing, and remove the drive pulley. the driven pulley, and the sec-ondary gear shaft speed sensors.
3. Replace the O-rings before reinstalling the drive pulley, the driven pulley, and the secondary gear shaft sp€ed sen-sors.
6x1.0mm12 N.m (1.2 kgf.m,8.7 lbf.ft)
6x1.0mm12 N.m (1.2 kgt.m,8.7 tbf.ft)
DRIVEN PULLEY SPEED SENSOB
14-292

Start Clutch Control@
T
Start Clutch Calibration Procedure
NOTE: When the following parts are replaced, the TCM
must memorize the feedback signal for the start clutch
control.
. TCM
. Transmissionassembly
. Stan clutch assembly
. Lower valve bodv assembly
. Engine assembly or overhaul
'96 Model Only
CAUTION: Do not uso this procsdure on'97 - (X) mod-
els or you will damage the transmission. On '97 - 00
models, the TCM or PCM memorizes ths loodback sig'
nals when you drive the vehicle.
1. Engage the parking brake, and block the front
wheels securely.
2. Connect the SCS service connector to the Service
Check Connector as shown. (The Service Check
connector (2P) is located under the dash on the
passenger's side of the vehicle.)
CONNECTOR07PAZ - lDl01(xt
Start the engine, and warm it up to normal operat-
ing temperature (the radiator fan comes on twice).
Fully depress the brake pedal and accelerator for 20
seconds in the E] position.
rl ,
CONNECTOR I2PI
14-293
7.
Shift into E o|. E position. To store the engine
negative pressure in memory. Iet the engine idle in
E or E position for one minute under the follow-
ing conditions:
. With the brake pedal depressed,
. with the y'\/c switch oFF.
. With the combination light switch OFF.
. With the heater fan switch OFF.
. Turn OFF all other electrical systems
NOTE: Start step 5 within 60 seconds after the radi-
ator fan goes off.
Shift into E position, and let the engine idle for two
minutes to store the feedback signal in memory
under the same conditions as in step 5.
Connect the Honda PGM Tester. Check that the TCM
has completed the start clutch calibration.
NOTE:
. The TCM will not store the feedback signal when
the CVT fluid temperature is below 40"C (104'F)
even if the engine coolant temperature reaches
the normal operating temperature.
. Repeat these procedures until the start clutch
calibration is completed-
Disconnect the SCS service connector from the
Service Check Connector.
'97 - 00 Models
The TCM ('97 - 98 models) and PCM ('99 - 00 models)
memorize the feedback signal when you drive the
vehicle as follows:
. After warming up the engine (the radiator fan
comes onl.
. Shift into E position.
. Turn OFF all electrical systems,
. Drive the vehicle up to the speed 37 mph (60
km/h).
. After the speed reaches 37 mph (60 km/h),
release the accelerator for 5 seconds.

Symptom-to-Component Chart
Hydraulic System
*1: Some gear noise is normal in the Lll position due to planetary gear action.
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SYMPTOMCheck these items on the PBOBABLE CAUSE List
Engine runs, but vehicle does not move in any position.'t,2,3,4,5,6,7,8,9, 10, 20, 34, 35, 36, 38, 41
Vehicle does not move in @, [. p positions.10,11, 12, 20, 41
Vehicle does not move in E position.5, 'to, 11, 12, 17, 1A, 19, 20,39, 41
No shift to higher ratio,9, 13, 14. 15, 16,35,37,40
Poor acceleration.9, 13,'t4,'t5,16. 20, 35, 37, 38, 40
Flares on moving.9,'t0, 20, 2't, 35, 36, 38, 40, 42
Excessive shock when depressing and releasing.^^alA/.r^r ^A.1. I9, 10, 20, 2'1, 35, 36, 3A, 42
No engine braking.9,20,21,35,36,38
Vehicle does not accelerate in lll position.9, 17, 18, 19, 20. 35, 36, 38
Vehicle moves in E position.
(Shift cable adjustment is proper).10, 22,23
Late shift from N position to E position, and from Eposition to E position.'10,11, 12,22, 41
Late shift from E position to E position. and from Eposition to N position.1l,'t2, 17, 18,22, 41
Engine stops when shifted to E position from E position.9, 10,20,35,37,34, 42
Engine stops when shifted to E position from I position.9, 18, 19,20,25,26,35,37,38, 42
Noise from transmission in @ position.rl5, 17, 18, 't9,25,26
Excessive idle vibration.2,3,4,21,24
Noise from transmission in @ and @ positions.2,3, 19,24,25,2A
Hunting engine speed.16, 35, 37, 38
Vibration in all position.8, 2a
Shift lever does not operate smoothly.11,29, 4'l
Transmission will not shift into lll position or transmis-
sion cannot be removed from E position.11 , 29, 30, 31, 32,33
Vehicle does not accelerate to more than a certain speed.9, 10, 14, 15,'t6,20,35,37
Excessive shock on starting off.38, 42
Flares on accelerating at low speed.20, 21 ,38, 42
Excessive vibration in E, E, tr, E positions.20,21,38, 42
Low engine speed in E. E. tr. E positions.20,21,38,42
Stall speed high.10,20,38
Stall speed low.9, 20, 27 ,37 , 38
Judder on starting off.20, 43

Stall Speed
Test
CAUTION:
. To prevent transmission damage, do not test stall sp€€d for mole than 10 seconds at a time.
. Do not shift the lsver whils raising the engine speod.
. Be sure lo remove the pressure gauge before tosting stall speed.
. Stall speed tssts should be used tor diagnostic purposes only,
1. Engage the parking brake, and block the tront wheels.
2. Connect a tachometer to the engine, and stan the engine.
3. Make sure the A/C switch is OFF.
4. After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift into E position.
5. Fully depress the brake pedal and accelerator for 6 to 8 seconds, and note engine speed,
6. Allow two minutes for cooling, then repeat the test in E, E, and E positions.
Stall Speed BPM in E poshion:
Specification: 2,500 rpm
Servic€ Limit: 2,350 - 2.650 rpm
Stall Speed RPM in E, E and E positions:
Specitication: 3,000 rpm
Service Limit: 2,800 - 3,100 rpm
TROUBLEPROBABLE CAUSE
Stall rpm high in @. p. [, and @ positionsLow fluid level or ATF pump output
Clogged ATF strain€r
PH regulator valve stuck closed
Slippage of forward clutch
Faulty start clutch
Stall rpm high in E position. Slippage of reverse brake. Faulty start clutch
Stall rpm low in E, P, [, and @ positionsEngine output low
Faulty stan clutch
Stuck shift valve
14-294

Fluid Level
l.Checking/Changing
CAUTION: while chscking and changing, be sure not to
allow dust and other toreign particles to ent€l inlo the
transmission.
Checking
NOTE: Check the fluid level with the engine at normal
operating temperature (the radiator fan comes on).
'1. Park the vehicle on the level ground. Turn oft the
engrne.
2. Remove the dipstick (yellow loop) from the trans-
mission, and wipe lt with a clean cloth.
NOTE: Check the transmission fluid 50 to 90 sec-
onds after shutting off the engine.
3. Insert the diDstick into the transmission.
DIPSTICK (YELLOW LOOPI
Remove the dipstick and check the fluid level.
should be between the uDDer and lower mark.DIPSTICK
5. lf the level is below the lower mark, add fluid into
the filler hole to bring it to the upper mark. Use
Genuine Honda CW Fluid only.
6. Insert the dipstick into the transmission.
14-299
Changing
1. Bring the transmission up to normal operating tem-
perature (the radiator fan comes on) by driving the
vehicle. Park the vehicle on the level ground, and
turn off the engine.
2. Bemove the drain plug, and drain the CVT fluid.
NOTE| lf a cooler flusher is to be used, see page 14-
352 and 14-353.
Reinstall the drain plug with a new sealing washer,
then refill the transmission with Genuine Honda
CVT Fluid to the upper mark on the dipstick.
Automatic Transmission Fluid CaPacity:
3.9 i (4.r US qt. 3.4 lmp qt) 8t chlnging
6.4 I (6.8 US qt, 5.6 lmp qt) 8t ov€lhaul
Rscommended Automatic Transmission Fluid:
Genuine Honda CVT Fluid-
Use Genuine Honda CW fluid only. Using other flu-
ids can affect transmission operation and may
reduce transmission liJe.
Change Interval:
Normal Condition: 30, 000 miles 148,000 km)
Severe Condition: 30,000 miles (48,000 km), but it
you drive at high sPeeds in high
t90"F (32'C) and abovol temper-
atures, the ttansmission fluid
should be changed evsrY 15,000
miles 124,000 km).
{-]lr
ORAIN PLUG18 x 1.5 mma9 N.7n (5.0 kgl.m, 36 lb{'ftl
SEALING WASHERReplace.