1996 HONDA CIVIC out

Description
(cont'd)
Gear Sel€stion
The shift lever has six positions: @ pARK, E REVERSE, E NEUTRAL, E DR|VE, g SECOND, and El LOW.
Staning is possible only in E and E positions through the use of a slid6-type, neutrafsafety switch.
Automrtic Transaxle {A/T} Gear Position Indicltor
The A-lT gear position indicator in the instrument panel shows which gear has been selected without having to look downat the console.
PoshionDe3cription
E PARK
E REVEBSE
E NEUTRAL
D DRIVE
E SECOND
E LOW
Front wheels locked; park pawl engaged with the park gear on the driven pulley shaft. The startclutch and the forward clutch released.
Reverse; reverse brake engaged.
Neutral; the start clutch and the forward clutch released.
General driving; the transmission automatically adjusts to keep the engine at the best speed fordriving conditions.
For rapid accelsration at highway speeds; the transmission shifts into a lower range of ratios forbetter acceleration and increased engine braking.
For engine braking and power for climbinO; the transmission shifts into the lowest range of theralros.
l-
14-196

Description
Clutches/Reverse Brake/Planetary Gear/Pulleys
Clulches/Reverse Brake
The CVT uses the hydraulically-actuated clutches and brake to engage or disengage the transmission gears. When
hydraulic pressure is introduced into the clutch drum and the reverse brake piston cavity, the clutch piston and the reverse
brake piston move. This presses the friction djscs and the steel plates together, locking them so they don't slip. Power is
then transmitted through the engaged clutch pack to its hub-mounted gear. and through engaged ring gear to pinion
gears.
Likewise, when the hydraulic pressure is bled from the clutch pack and the reverse brake piston cavity, the piston releases
the friction discs and the steel plates, and they are free to slide past each. This allows the gear to spin independently on its
shaft, transmitting no power.
Start Clutch
The start clutch, which is located at the end of the driven pulley shaft, engages/disengages the secondary drive gear.
The start clutch is supplied hydraulic pressure by its ATF feed pipes within the driven pulley shaft.
Forward Clutch
The forward clutch, which is located at the end of the drive pulley shaft, engages/disengages the sun gear.
The forward clutch is supplied hydraulic pressure by its ATF feed pipe within the drive pulley shaft.
Reverse Brake
The reverse brake, which is located inside the inte.mediate housing around the ring gear, locks the ring gear in E posi-
tion. The reverse brake discs are mounted to the ring gear and the reverse brake plates are mounted to the intermediate
housing. The reverse brake is supplied hydraulic pressure by a circuit connected to the internal hydraulic circuit.
Planetary Gear
The planetary gear consists of a sun gear, a carrier assembly, and a ring gear. The sun gear is connected to the input shaft
with splines. The pinion gears are mounted to the carrier which is mounted to the fo.ward clutch drum. The sun gear
inputs the engine power via the input shaft to the planetary gear, and the carrier outputs the engine power. The ring gear
is only used for switching the rotation direction of the pullev shafts,
In E. E, and E positions (forward range), the pinion gears don't rotate and revolve with the sun gear, so the carrier
rotates. In E] positjon {reverse range), the reverse brake locks the ring gear and the sun gear drives the pinion gears to
rotate. The pinion gears rotate and revolve in the opposite direction from the rotation direction of the sun gear, and the
carrier rotates with pinion gear revolution.
Pulleys
Each pulley consists of a movable face and a fixed face, and the effective pulley .atio changes with engine speed. The
drive pulley and the driven pulley are linked by the steel belt.
To achieve a low pulley ratio, high hydraulic pressure works on the movable face of the driven pulley and reduces the
effective diameter of the drive pulley. and a lower hydraulic pressure works on the movable face of the drive pulley to
eliminate the steel belt slippage. To achieve a high pulley ratio, high hydraulic pressure works on the movable face of the
drive pulley and reduces the eifective diameter of the driven pulley, and a lower hydraulic pressure works on the movable
face of the driven pulley to eliminate the steel belt slippage.
b
14-198

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

PGM Terminal Voltage/Measuring Conditions ('99 - 00 Modelsl
A/T Control System
The PCM terminal voltage and measuring conditions are shown for the connector terminals that are related to the A/T con-trol system. The other PCM terminal voltage and measuring conditions are described in section 11.
PICM Connoctor Terminrl Location3
Terminal NumberSignalDescriplionMeasuring Condhions/Torminal Voltage
A7ATP DA,/T gear position switch
E position input
InEposition:OV
In other than E] position: Approx. 1O V
A9ATP NPA/T gear position switch
@ and S positions input
In E and El positions: 0 V
In other than E] and E position: Approx. 1O V
A10Timing and adjustment service
check signal
With ignition switch ON {ll} and service check
connector oDen: 5 V
With ignition switch ON (ll) and service check
connector connected with soecialtool:0 v
ATP LA,/T gear position switch
I position input
In E position; OV
In other than E position: Approx. 10 V
STOP SWBrake switch signal outputBrake pedal depressed: Battery voltage
Brake pedal released: 0 V
PCM CONNECTOR B I25P}
Terminal NumberSignalDescriptionMoasuring Condhions/Terminal Vohage
B1IGPlPower supply circuit from main
relay
With ignition switch ON (lll: Battery voltage
With ignition switch OFF: 0 V
82PG1Ground
B8HLC LSMPH-PL control linear solenoidpower supply neqative electrode
B9IGP2Power supply circuit from main
relay
With ignition switch ON (lll: Battery voltage
With ignition switch OFF:0 V
810PG2Ground
817HLC LSPPH-PL control linear solenoid
power supplypositive electrode
With ignition switch ON {ll): Pulsing signal
818SC LSMStart clutch control linear
solenoid power supply negative
electrode
s20LGIGround
821VBUBack-up power supplyAlways battery voltage
B22Ground
825SC LSPStan clutch control linear
solenoid power supply positive
electrode
With ignition switch ON (ll): Pulsing signal
t
14-232

Electrical Troubleshooting ('99 - 00 Models)
Troubleshooting Flowchart - El Indicator Light Does Not Come On
PCM CONNECTOR B I25PI
LGl {BRN/BLK)
Wire side ot female terminals
LGlIARN/BLK) LG2IBRN/BLKI
The D indicator light does notcome on whon ths ignhion switchis tirst turned ON {lll. llt shouldcome on tor about two s€conds.)
Check the Service Check Connec-tor:Make sure the special tool {SCSService Connectorl is not connected to the service check con-nector,
ls the special tool (SCS
Service Connectorl connectedto the service check connec-tor?
Disconnect the sp€cial tool f]omthe seruice chcck connoclor andaecheck.
Check the E Indicalor Light:Shift to E posjtion.
Check tor loose te.minal fit in thePCM connectors, lf nocessary,substitute a known-good PCMand aecheck.
Does the E indicator light
Check the Ground Circuit:1. Turn the ignition switch OFF.2. Disconnect the B (25P) connector from the PCM.3. Check tor continuity betweenthe 820 terminal and bodyground, and between the 822terminal and body ground.
Fepair open in th. wirosb€tw.en the 820 end 822 termi-nals and ground {G1011, !ndrepair poor ground {G1011.
ls there continuity?
Measure Power Supply CircuitVoltage:1. Turn the ignitlon switch ON (ll).
2. Measure the voltage betweenterminals Bl and 822 andbetween terminals B9 and820.
Ropair op€n or short in tho wireb€tween the Bl and/or B!| tarmi-nds and the PGM-FI main .ohy,and between tho PGM-FI mainrelay and the under-hood fuso/r€lav box.
ls there battery voltage?
To page 14-289
14-2AA

t.
rl,
fl,
PROBABLE CAUSE LIST
Low CVT fluid level
ATF pump worn. AT gears worn or damaged. Foreign material in ATF pump.
ATF pump chain/ATF pump sprocket worn or damaged.
Input shaft worn or damaged.
Sun gear worn or damaged.
Final driven oear worn or damaqed,
Secondary drive gear/secondary driven gear worn or damaged-
5
6
1
8Flywheel/drive plate worn or damaged.
Intermediate housing assembly worn or damaged.9
'10Forward clutch defective.
Shift cable broken/out of adiustment.
M"nu"t t"uffi
ATF feed pipe (pulley pressure) worn or damaged.
Vchiclc speed sensor defective.
TCM or PCM defective.
Reverse brake detective.
1'r
't2
13
14
16
'11
'18
1qPlanetary gear worn or damaged.
Sta rt clutch defective.
ATF feed pipe (start clutch pressure) worn or damaged
20
t't
Clutch clearance/reverse brake clearance incorrect.
23Reverse brake return spring/retainer worn or damaged
24Needle bearing on input shaft worn or damaged.
25Thrust needle bearing on carrier worn or damaged.
Thrust washer on carrier worn or damaged.
Enoine outout low.------------------------
Flvwhcel assemblv defective.
Control lever worn or damaged.
Park pawl/park pawl shaft worn or damaged
Detent lever/park brake rod assembly worn or damaged
27
29
30
32Park gear worn or damaged.
Park pawl spring worn or damaged.
ATF strainer/ATF filter clogged.
Lower valve body assembly defective.
Lower valve bodv assemblv defective (PL regulator valve body assembly defective)'
33
34
50
Lower valve bodv assembly defective (shift valve body assembly defective).
Lower valve bodv assemblv defective (start clutch control valve body assembly defective)'
39Lower valve bodv assemblv defective {inhibitor solenoid defective}
40Solenoid harness worn or damaged.
Manual valve body worn or damaged.
PB feedback system defective.
CVT fluid deteriorated.
41
43
14-295

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

1.
Start the engine.
Shift to the respective shift lever positions in the table, and measure the following pressures at 1'500 rpm'
. Forward Clutch Pressure
. Reverse Brake Pressure
. Drive Pulley Pressure
. Driven Pulley Pressure
8. Shift to E posltion, and measure the lubrication pressure at 3,000 rpm'
Disconnect the special tool after pressure testlng
Install the sealing boits in the jnspection holes with new sealing washers, and tighten the bolts to the specified
toroue.
TOROUE: 18 N.m {1.8 kgf'm, 13 lbf'ft}
CAUTION: Keep all foreign particles out of the transmission'
9.
10.
PBESSURESHIFT LEVER
POSmONSYMP{OMPROBABLE CAUSE
FLUID PRESSURE
Standard/Ssrvice Limit
Forwa rd
Clutch
ENo or low for-
ward clutch
pressure
Forward Clutch1.4 - 1.75 MPa
(14.3 - 17.8 kgtcm', 203 - 253 Psi)
Reverse
Brake
tsNo or low
reverse brake
pressure
Reverse Brake1.4 - 1.75 MPa
(14.3 - '17.8 kg7cm', 203 - 253 Psi)
Drive
Pulley
NNo or low
drive pulley
pressure
ATF pump, PH reg-
ulator valve, PL
regulator valve,
Shift valve
0.2 - 0.7 MPa
(2 - 7.1 kgflcm', 28 - 101 Psi)
Drive pulley
pressure roo
high
PH regulator valve,
PL regulator valve,
Shift valve. Shift
control linear
solenoid
Driven
Pulley
No or low
driven pulley
pressure
ATF pump, PH reg-
ulator valve, Shift
valve, Shift control
linear solenoid
1.5 - 2.3 MPa
(15.3 - 23.5 kg?cm', 218 - 334 Psi)
Driven pulley
pressure too
h igh
PH regulator valve
LubricationNo or low
lubrication
pressure
ATF pump,
Lubrication valve
Above 0.2 MPa
(Above 2 kgf/cm'. 30 Psi)
14-301