2000 HONDA CIVIC Body

Description
Hydraulic Control
The hydraulic control system is controlled by the ATF pump. the valves, and the solenoids. The ATF pump is driven by theinput shaft. The ATF pump and the input shaft are linked by the ATF pump drive chain and the sprockets, The inhibitorsolenoid valve and the linear solenoids. which are located on their valve body, are controlled by the TCM or pcM. Fluidfrom the ATF pump flows through the PH regulator valve to maintain specified pressure to the drive pulley, the driven pul-ley, and the manual valve,
The lower valve body assembly includes the main valve body, the PL regulator valve body, the shift valve body, the startclutch control valve body, and the secondary valve bodv.
Main Valve Eody
The main valve body contains the pH control valve, the rubrication valve, and the pitot regulator valve.
PH Control Valve
The PH control valve supplies PH control pressure (PHCI in accordance with the pH-pL control pressure (HLc), and sup-plies PH control pressure to the PH regulator valve, which also regulatss PH pressure. At kick-down, it increases pHcontrol pressure which increases the high (PH) pressure. This shortens the shift speed by releasing the reverse inhibitorpressure (Rl)from the inhibitor solenoid valve.
Lubrication Valve
The lubrication valve controls the lubrication pressure to each shaft and maintains lubrication pressure. When rne pres-sure is too high, the spring is compressed. This moves the lubrication valve and opens the fluid leak passage.
Pitot Regulalor Valv6
The pitot regulator valve controls the start clutch pressure (SC) in accordance with the engine speed, when the electron-ic control system is faulw.
MAIN VAIVEBODY
L.
14-208

Secondary Valve Body
The secondary valve body contains the PH regulator valve. the clutch reducing valve' the start clutch valve accumulator'
and the shift inhibitor valve
PH Regulator Valve
The pi regulator valve maintains hydraulic pressure supplied from the ATF pump. and supplies PH pressure to the
hvdraulic control circuit and the lubrication circuit. PH pressure is regulated at the PH regulator valve by the PH control
pressure (PHC) from the PH control valve.
Cluteh Reducing Valvo
The clutch reducing valve receives PH pressure from the PH regulator valve and regulates the clutch reducing pressure
(cR). The clutch reducing valve supplies clutch pressure (cR) to the manual valve and the start clutch control valve' and
supplies signal pressure to the PH-PL pressure control valve. the shift control valve, and the inhibitor solenoid valve'
Start Clutch Valv€ Accumulator
The start clutch vatve accumutator stabilizes the hydraulic pressure that is supplied to the start clutch'
Shift Inhibitor Valve
The shift inhibitor valve switches the fluid passage to switch the start clutch control from electronic control to hydraulic
control when the electronic control system is faulty. lt also suppliss clutch reducing pressure (cR) to the pitot regulator
valve and the pitot lubrication pipe.
START CLUTCH VALVE
SECONDARY VALVEBODY
SHIFT INHIBITOE VALVE
(cont'd)
PH REGULATOR VAL
REDUCING VALVE
14-209

Description
Hydraulic Control {cont'dl
PL Regulator Valve Body
The PL regulator valve body contains the PL regulator valve and the PH-PL control valve. which is joined wirh the pH-pL
control linear solenoid. The inhibitor solenoid is bolted on the pL regulator valve body.
. PL Regulator Valve
The PL regulator valve supplies low p.essure (pL) to the pulley to eliminate steel belt slippage.The PL pressure is controlled by the pH-pL control pressure (HLC).
. PH-PL Control Valve
The PH-PL control valve controls the PL regulator valve according to engine torque. The PH-PL control valve suooliesPH-PL control pressure (HLC) to the PH control valve to regulate PH pressure higher than pL pressure. The pH-pL con-trol valve is controlled by the PH-PL control linear solenoid. which is controlled by the TcM or pcM,
. Inhibitor Solenoid
The inhibitor solenoid controls the reverse inhibitor valve by turning on and off. Also, the inhibitor solenoad controls pH
control pressure (PHC) by applying reverse inhibitor pressure (Rl) to the PH control valve. The inhibitor solenoid is con-trolled by the TCM or Pclvl.
Start Clutch Control Valv€ Body
The start clutch control valve body contains the start clutch control valve. Both are joined to the stan clutch control linearsolenoid.
. Start Clutch Control Valve
The start clutch control valve controls start clutch engagement according to the throttle opening. The start clutch con,trol valve is controlled by the stan clutch control linear solenoid, which is controlled bv the TCM o. pCM.
START CLUTCH CONTROLvAt-vE
LOWER VALVE BODYASSEMBI-Y
PH.PL CONTROLLINEAR SOLENOID
I.
14-210

Shift Valve BodY
The shift valve body contains the shift valve and the shift control valve. Both are ioined to the shift control linear solenoro.
r tl'ft1il1rf"","" is controred by shift varve pressure (sV) from the shift contror varve. The shift varve distributes pH
pi""aur" "nO PL pressure to drive pulley and the driven pulley' to shift the transmission'
t t*"rilf:::lr';ivarve contrors the shift varve in accordance with the throttre opening and vehicle speed rhe shift
control valve is convorr"o uv ti" "iirt "ontrol linear solenoid, which is controlled by the TcM or PcM When the elec-
tronic control system is faulty, t;; snift controt uutue "witches the shift inhibitor valve to uncover the port leading the
pitot regulator pressure to the start clutch
CONTROL VALVE
VALVE BODY
T;J:"i"""1ff"t""ilody contains the manuar varve and the reverse inhibitor varve. The manuat varve bodv is borted to the
intermediate houslng
. ManualValve
The manual valve mechanicallY uncovers/covers the fluid passage according to the shift lever position'
'
ff:e;;;.'::'?Xftl::T",* is contro ed by the reverse inhibitor pressure (Rl). lt intercepts the hvdraulic circuit to the
reverse brake while the vehicle is moving forward at speeds over approximatelv 6 mph (10 km/h)'
REV€RSE INHIBITORVALVE
MANUAL VALVEBODY
SHIFT CONTROL
MANUAL VALVE
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Electrical Troubleshooting (,96 - 9g Modelsl
Troubleshooting Flowchart - Shift Control Linear Solenoid
Possible Cause
' Disconnected 3olenoid h.rn€isconnoctor. Short or open in 3hift controllinear solenoid wire. Faulty shift control linear sole-noidSOLENOID HARNESS8P CONNECTOR
Terminal stde of male terminals
Wire side of female terminals
8LU/YEL
NOTE: Record all freeze data before you troubleshoot.
. OBD ll Scan Toot indicates CodeP1870.. Selt-dirgnosis [d indic.tor tightindicatos Code 30.
Measure Shift Control Linoar Sole-noid Resistance at the SolenoidHarness Connector:1. Disconnect the 8p connectorfrom the solenoid harness connector.2, Measu re the resistancebetlveen the No. 3 and the No.7 terminals ofthe solenoid haFness connector.
ls the resistance 3.8 - 6.8 O?
Check Shift Controt Linear Sote-noid for a Short Circuit:1. Disconnect the A (26p) con,nector from the TCM.2. Check for continuity betweenbody ground and the A3 terminal and the A16 terminalindividually.
Repair shon in tho wire6 betweonthe A3 and A16 termin.ts lnd thobody ground.
Measure Shitt Control Line.rSolenoid Resistance:1. Connect the 8P connector tothe solenoid harness connec,tor.2, Meas u re the resistancebetween the 43 and A16 ter-
Repair loose terminal oa open inthe wires between the 43 andA16 terminal3 and the solenoidharness connector.
ls the resistance 3.8 6.8 O?
Chock for loose TCM connectorc.ll necessary, substitute a known-good TCM and recheck.
BLU/WHT
GRN/YEL
TCM CONNECTOR A I26PI
GRN/YEL
ll 12l:
IriGlx
1578910111213
172t)232526
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Troub|eshootingF|owchart_PH-PLControJLinearSo|enoid
NOTE| Record all treeze data before you troubleshoot
Possible cause
' Disconnected solenoid harness
connectof. Short or oPen in PH_PL control
linear solenoid wire. Faulty PH-PL control linear sole_
noidSOLENOIO HARNESS8P CONNECTOR
GRN/WHT
Terminal side of male termlnals
Wire side ol female terminals
. OBD ll Scan Tool indicates Codo
P1873.. sef-diagnosis E indicalor light
indicat6 Code 31.
Measure PH-PL Control Linear
Solenoid Resistance at the Sole_
noid Hatness Connectot:1. Disconnect the 8P connector
from the solenoid harness con-
nector,2. Measure the resistance
between the No 2 and the No.
6 terminals ofthe solenoid har
ness connector'
ls the resistance 3.8 - 6.8 0?
Check PH-PL Control Lineer
Solenoid for a Short Circuit:
1. Disconnect the A 126P) con-
nector lrom the TCM
2. Check for continuity between
body ground and the A2 ter
minal and the A15 terminal
individually.
Repair short in th€ wires
between the A2 and A15 lermi_
nals and the body glound.
Measute PH-PL Control Linear
Solenoid Resi3tance:1. Connect the 8P connector to
the solenoid harness connec-
tor,2, Meas u re the reslslance
between the ,q2 and A15 ter_
Rep.il loose tetminal or oPen in
th6 wires betwccn the A2 and
A15 lerminals and the solenoid
harness conn€ctol.
lsthe resistance 3.8-6 8 O?
Check for loose TCM connactors
lf neceasery, Substitute a known-good TCM and rechock.
PNK/BLK
TCM CONNECTOR A (26P)
oPNK/BLK
I234578I10l11213
11't5161720/,,/232526
IGRN/wHr
o
*r}l
t'T,
E[
PNK/8LK
3a5I910111213
1620232526
GRN/WHT
14-251

Electrical Troubleshooting ('96 - gg Modelsl
Troubleshooting Flowchart - start clutch control Linear solenoid
NOTE: Record all freeze data before you t.oubleshoot.
Po$iblo C.u.o
' Di3aonnoctod solanoid harncatconnactol. Short or opon in start clutchcontrol linoar tolanoid wira. Faulty ttart clutch control lino.rsolanoid
SOLENOID HARNESS8P CONNECTOR
Terminal side of male terminals
Wire side of female terminals
. OBO ll Scan Tool indicatG CodeP1879.. Self-dilgno.is E indicator lightindiclt$ Code 32.
Me.suro Sta.t Clutch ControlLinear Solenoid Rosirtrnco st th.Solenoid Hrrn6rs Connecto.:1. Disconnect the 8P connectorfrom the solenoid harness con-nector.2, Measure the resistancebetween the No. 4 and the No.8 terminals otthe solenoid har-ness connectot.
ls the resistance 3.8 - 6.8 0?
Chock Start Clutch Control Lin-oar Solenoid tor a Short Circuit:1. Disconnect the A (26p) con,nector from the TcM.2. Check lor continuity betweenbody ground and the A1 ter-rninal and lhe Al il terminalindividually.
Raprir 3hort in tha wira3b.ftvcen tho A1 .nd Atil t .mi.n.l. .nd thr body ground.
Measure Stan Clutch Cont.olLineer Solenoid F6aist.ncei1. Connect the 8P connector tothe solenoid harness connec-tor.2. Meas u re the resistancebetween the 41 and Al4 ter-minals,
Rcplir loose tcrminal or oDcn inthG wiras b.tween the Al rndAla torminal3 rnd tha 3olanoidhamaas connactor.
ls the resistance 3.8- 6.8 O?
Check for loose TCM connecto.s.lf necessary, substitute a known-good TCM and iecheck.
YEL
PNK/BLU
TCM CONNECTOR A I26P}
-{r-
E
PNK/BLU
23a51I910ll1213
a15t61'20a252G
YEL
14-252

Troubleshooting Flowchart - Inhibitor Solenoid
NOTE: Record all treeze data betore you troubleshoot
Po$ibls Cause
. Dbconnected solenoid hatness
connedor' Short or opon in inhibitor sole'
noid wire. Faultv inhibitor solenoid
SOLENOID HARNESS8P CONNECTOR
Terminal side of male terminals
. OBD ll Scan Tool indic.td Code
P1882.. Selt-di.gnGis E indicator lighl
indic.tos Code 33.
Mea3ure Inhibhor Solenoid Resid-
ance at the sol€noid Harness
Connector:1. Disconnect the 8P connector
from the solenoid harness
connector.2. Measure the reslstance
betlveen the No 5 terminal of
the solenoid harness connec-
tor and body ground.
ls the resistance 11.7 - 21 0 0?
Check Inhibitor Solenoid lor a
Short Circuii:1. Disconnect the B (22P) con-
nector from the TCM.
2. Check for continuity between
the B1 terminal and bodygro!no.
Repair rhort in the wire ltetwegn
the 81 dnd the bodY ground.
Mea$rr€ Inhibitor Solenoid ResBt'
anoe:1. Connect the 8P connector to
the solenoid harness connec_
IOr.2. Measure the resistance
between the Bl and bodyground.
Reoair loose terminal or open in
the wire betwean the 81 and the
solenoid hame3s connector'ls the resistance 11.7 - 21.0 O?
Ch6ck for loose TCM connectors.
ll necessary, substhule a known_good TCM and techeck.
Wire side of female terminals
14-253