1997 HONDA CIVIC Starting

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

Symptom-to-Component Chart
Hydraulic System
*1: Some gear noise is normal in the Lll position due to planetary gear action.
14-294
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

Forward Clutch
Reassembly {cont'd)
9. Install the disc spring.
NOTE: Installthe disc spring in the direction shown.
- "arr"" o"u*
11.
Soak the clutch discs thoroughly in CW Fluid for a
minimum of 30 minutes.
Starting with a clutch plate. alternately install the
clutch plates and discs. Install the clutch end plate
with flat side toward the disc.
NOTE: Before installing the plates and discs, make
sure the inside of the clutch drum is free of dirt or
other toreign matter.
CLUTCH END PLATEInstall in this dir€ction.
10.
DISC SPRING
14-326
12. Installthe snap ring.
13. Verify that the snap ring end gap is correct.
SNAP RING
CLUTCH
Minimum 7.9 mm (0.31 ini

1.
7.
lnstall the ATF feed pipe in the transmission hous-
ing, and install the three ATF feed pipes with new
O-rings in the transmission housing,
Install the two dowel pins and new transmission hous-
ing gasket on the transmission housing.
Push the control shaft assembly toward the outside
of the transmission housing, then install the inter-
mediate housing assembly (four bolts).
lnstall the manual valve body separator plate and
the two dowel pins on the intermediate housing,
then install the rnanual valve body with the detent
spring (five bolts).
Put the control shaft assembly back, then install the
roller in the intermediate housing.
lnstall the reverse brake piston in the intermediate
housing.
Install the spring retainer/return spring assembly on
the reverse brake Piston.
NOTE: Installthe return springs on the spring guides
of the reverse brake piston securely
tnstall the special tool to compress the return spring
as shown.
REVERSE BRAKESPRING COMPRESSOR07TAE - P4V0110
6.
L
1
CAUTION: lf the spring retainer tab is on the reverse
brakc piston, the spring rstainer may be damaged'
Be sure the spring retainer tab is not on the piston'
rp
SPECIALTOOL REVERSEBRAKE
-^
14-339
10.
9.
14.
Compress the return springs, then install the snap
ring in the intermediate housing above the spring
retainer.
Verify that the snap ring end gap is correct'
Mini
/,,- '-t,,,,.
// \i/ ',r
'1 ,
.r' //'/. .-J?RINGSNAP
mum 15 mm 10.59 in)
Soak the reverse brake discs thoroughly in CVT
Fluid for minimum 30 minutes.
Installthe disc spring on the reverse brake piston'
Starting with a reverse brake plate, alternately
install the reverse brake plates and discs lnstall the
reverse brake end plate, and the snap ring'
Measure the clearance between the reverse brake
end plate and the top disc with a dial indicator' Zero
the dial indicator with a reverse brake end plate
lowered, and lift it up to the snap ring The distance
that the reverse brake and plate moves is the clear-
ance between the reverse end plate, and the top
disc.
NOTE: Take measurements in at least three places'
and use the average as the actual clearance'
STANDARD: 0.45 - 0.75 mm (0.018 - 0'030 in)
{cont'd)
11.
12.
13.

26. Install the thrust washer, the thrust needle bearing'
and the thrust washer on the carrier assembly'
SNAP RING
THRUST SHIM,
25x31 mm
Selective Pan
21.
24.
RING GEAR
THRUST NEEDLETHRUST WASHERS
EEARING
CARRIERASSEMBLY
lnstallthe ring gear and the 25 x 31 mm thrust shim,
then installthe snaP rrng.
Verify that the outside diameter of the snap ring is
correct,
Maximum 30.7 mm (1.21 in)
SNAP RING
Measure the clearance between the 25 x 31 mm
thrust shim and the snaP rlng.
STANDARD: O.O5 - 0.11 mm (0.0020 - 0.00'8 in)
NOTE: Take measurements in at least three places'
and use the average as the actual clearance
29.
,**r#*,".
'- t )
RING GEAR
14-341
30.
31.
lf the clearance is out of tolerance, remove the 25 x
31 mm thrust shim and measure its thickness'
Select and install a new 25 x 31 mm thrust shim.
then recheck.
THRUST SHIM, 25 x 31 mm
snap nng.RING
After replacing the 25 x 31 mm thrust shim, make
sure that the clearance is within tolerance and the
snap ring outside diameter is correct'
Install the disc spring in the direction shown'
Starting with a reverse brake plate, alternately
install the reverse brake plates and discs lnstall
selected reverse brake end plate, then install the
32.
33.
34.
REVERSEEND PLATE
BRAKE
Dtscs
SPRINGlnstall in this direction.
(cont'd)
REVERSEPI-ATES
No.Part Numb.lThickne*3
90451 - P4V - 0001.05 mm (0.041 in)
B90452-P4V-0001.12 mm (0.044 in)
c90453-P4V-000'1.19 mm (0.047 in)
D90454 - P4V - 000'l.26 mm (0.050 in)
90455-P4V-0001.33 mm (0.052 in)
F90456-P4V-0001.40 mm (0.055 in)
904s7-P4V-0001.47 mm (0.058 in)
90458-P4V-0001.54 mm (0.06'l in)
90459-P4V-000'1.61 mm (0.063 in)
J90460-P4V-0001.68 mm (0.066 inl
K90461-P4V-0001.75 mm (0.069 in)
90462-P4V-0001.82 mm (0.072 in)
M904a0-P4V-0001.085 mm (0.0427 in)
N90481-P4V-0001.155 mm (0.0454 in)
o901a2-P4V-0001.225 mm (0.0482 in)
90483-P4V-0001.295 mm (0.0510 in)
o90484-P4V-0001.365 mm (0.0537 in)
R904a5-P4V-0001.435 mm (0.0565 in)
90486-P4V-0001.5O5 mm (0,0593 in)
T90487-P4V-0001.575 mm (0.0620 in)
90488-P4V-00{)1.645 mm {0.0648 in)
90489-P4V-0001.715 mm (0.0675 in)
90490-P4V-0001.785 mm (0.0703 in)

Troubleshooting
Noise and Vibration
NOTE; Pump noise in first 2 - 3 minutes after starting in cold weather is normal.
Humming
Rattle or chattering
Humming due to pulsation of fluid is normal, particularlv when the wheel isturned with the vehicle stooDed.
lf equipped with automatic trans-mission, the hum could be thetorque conveater or pump noise.
Confirm by temporarily removingthe pump belt.
High-pressure line touching theframe.Reposition the line.
Loose steering shaft connector,tie-rod. or balljoint.Check and tighten, or replacepaats as necessary.
Column shaft wobbling.Replace the column assembly.
Check the rack guide tor properadjustment (see page 17,33).Adiusi, if necess€ry.
Rattling sound and feeling when turning the steering wheel raght and left with theengine OFF is normal.
Pump noise, though not loud. trom the valve body unit can be heard whon turn-ing the steering wheel right or left. This is normat.
CAUTION: When imp€sting, do not hold the steering wheet a[ the way tothe right or the left.
17-26

)
Pump noaseGrating noisefrom pump
Pump gear nois€
Check the tluid level.
lf low, fill the reservoir to the
proper level, and check lor leaks.
Tighten or replace as nocessary.
Cavitation caused bY air bubbles
in the fluid.
Check lor a crushed suction hose
or a loose hose clamp allowing
air into the suction side of the
sy$em.Tighton or roplace as necossary.
NOTE: Pump noise uP to 2 - 3
minutes alter starting in cold
weather is normalCompare pumP noise at operating
temperature to simular vehicle.
lf pump nois€ is abnormallY loud,
remove and inspect the PUmP for
w6ar and damage (see Page 17-
41).
lz/
Rattle or chattgring
17-27
Tighten or replace the Pulley.lf shatt is loose, rePlace thepump.
tr

Anti-lock Brake System {ABS)
Operation (cont'dl
ABS Modulator
The ABS modulator consists of the inlet solenoid valve, outlet solenoid valve, reservoir, pump, pump motor and thedamping chamber.
The modulator reduces the caliper fluid pressure directly, and it is also referred to as a circulating type because the brake fluidcirculates through the caliper, reservoir and the master cylinder.The hydraulic control has three modes: pressure reducing, pressure retaining, and pressure intensifying.The hydraulic circuit is the independent four channel type, one channel for each wheel.
RF LR
Pressure intensifying mode: Inlet valve open, outlet valve closed
Pressure retaining mode:
Pressure reducing mode:
Motor operation mode:
rN: INLETVALVE {NORMALtY OpENIOUT: OUTIET VALVE {NORMALIY CTOSED)Master cylinder fluid is pumped out to the caliDer.Inlet valve closed, outlet valve closedCaliper fluid is retained by the inlet valve and outlet valve.Inlet valve closed, outlet valve oDenCaliper fluid flows through the outlet valve to the reservoir.When starting the pressure reducing mode, the pump motor is ON.When stopping ABS operation, the pump motor is OFF.The reservoir fluid is pumped out by the pump, through the damping chamber, to the mastercvlinder.
PUMP MOTOR
19-48