1999 HONDA CIVIC no. 25

Description
Hydraulic Flow
General Chart ol Hydraulic PressureATF Pump- pegurator varve -_l- Line pressure -f- Modurator pressure - Linear sorenoid
| -Clutch pressure
-Torque Converter pressure
t-Lubrication Pressure
Distribution of Hydraulic Pressur€. Regulator Valve -]- Torque Converter pressure
F_ Lubrication pressure
i- To regulate Line pressure
. Manual valve _ To select Line pressure _ clutch pressure
' Modulator Valve i/odulator pressure _ ___f_ Shift Control Solenoid Valves
F_ Lock_up Control Solenoid ValvesL_ Linear Solenoid
. 1-2 Shift Valve - l. 2-3 Shift Valve - 1- Ctutch pressure. 3-4 Shift Valve
lra
PORT NO.DESCRIPTION OF PRESSUREPORT NO.DESCRIPTION OF PRESSUREPORT NO.DESCRIPTION OF PRESSURE
1LINE6B
MODULATE(SHIFT CONTROL
SOLENOID VALVE B)
414TH CLUTCH
LINEMODULATE(LOCK-UP CONTROL
SOLENOID VALVE A)
56LINEAR SOLENOID
LINE6D
MODULATE(LOCK-UP CONTROL
SOLENOID VALVE B)
90TOROUE CONVEBTER
2LINE6D'
MODULATE
(LOCK-UP CONTROL
SOLENOID VALVE B)
91TOROUE CONVERTER
LINE7LINE92TOROUE CONVERTERLINE8LINE/CPC93ATF COOLER3"LINE9LINE94TOROUE CONVERTER4LIN E'101ST CLUTCH95LUBRICATION
LINE202ND CLUTCHYOTOROUE CONVERTERLINE20A2ND ACCUMULATOR97TOROUE CONVERTER5LINE99SUCTION
MODULATE303RD CLUTCHXDRAIN
6A
MODULATE(SHIFT CONTROL
SOLENOID VALVE A)
404TH CLUTCH
14-24

PGM Gircuit Diagram (A/T Control System: '96 - 98 Modelsl
UNDEfl -HOOD FUSE/RELAY BOX
No.41 (80A1 N0.42 l40A)
No.47 {7.5 A)
No.l3 (15A)
Arp Np lon,^o l r,, lotrr l 6lt l 3]t lot*
UNDER DASHFUSE/REIAY 8OX
/8LU
c10
YEUBLKBtK
424
Btx
At0423
'96:BLU/BED'97, '98r GFN/BLK
TTTYEL GRN BLULT GRN
BLK/BTU
RED
GRNiELK
F- BTK/BI.U
F_wHr
F- GRN
f- GRN
F- Bru
GRN
BLU
NorE: t :ro5v
T :ro 12v
GAUGE ASSEMBTY
A,T GEAR POSITIONINDICATOR
824 t88 tB17'96: GRN 8LU
'96: BLU/RED al'97,'98: GRN/8LK --

From page 14-56
Ch6ck Lock-up Control Solenoid
Valve A tor a Short Cilcuiti
1. Disconnect the 2P connector
lrom the lock-up control sole-
noid valve assemblY.2. Check for continuity between
the 85 and Ag or A22 termi-
nats.
Ropair 3hort to giound in iha wila
b.twoqn th6 85 terminrl rnd tho
locl-up control 3olanoid valvo A.
Mo..ura Lock-up Control Sole'
noid Velve A Reri3tanc. at tho
Solenoid Conn6cto.:Measure the resistance betweenthe No. 2 terminal of the lock-up
control solenoid connector and
body ground.
Chock for opan in tha wit.
ba(w.an tha 85 torminll lnd the
lock-uo control lolanoid vtlYa A.ls the resistance 12 _ 25 O?
Roplsce tho lock"up cont.ol 3ol€_
noid vllvo arsembly.
PCM CONNECIOBS
Wire side of lem6leterminals
LOCK.UP CONTROLSOrINOID CONNECTOR
YEL
Teaminal side of malo terminals
lml-,f
(o)
I
14-57

From page 14 58
Check Lock-up Control Solenoid
Valve B for a Short Circuh:
1. Disconnect the 2P connector
from the lock-uP control sole'
noid valve assefibly.
2. Check for continuity between
the 84 and A9 or A22 terma-
nals,
Rgprir 3hort to ground in tho wite
Hwoon the 84 torminal and the
lock-uo contlol solonoid valvs B.ls there continuity?
Measu.o Lock-uP Control Sole'
noid Valve I Resistance at tho
Solenoid Connector:Measure the resistance between
the No. 1 terminal o{ the lock-up
control solenoid connector and
body ground.
Chcck tor opcn in the wirs
b€tlve.n the 84 ierminal and tho
lock-up conttol solonoid vllvc B.ls the resistance 12 - 25 O?
Reolace the lock'up control sole-
noid valve assemblY.
PCM CONNECTORS
Wire side oI lemale terminals
LOCK.UP CONTROL
SOLENOID CONNECTOR
IFl;II-r:-]
6nn/eLKfi
I
Terminal sido ot male terminals
14-59

From page 14-64
Check Shift Control Sol.noid
v.lve A loi a Short Circuh:'1. Disconnect the 2P connector
from the shift control solenoid
valve assemblY.2. Check for continuity between
the 83 and Ag or A22 terminals.
Roprir shon to ground in th. wil.
b.tw€on th. B:t t.rmin.l rnd tho
ihift conLol aolonoid valvc A
Mea3ur. Shift Control Solonoid
v.lvo A Rgistance !t tho solendd
Connoc'tor:Measure the resistance between
the No. l terminalofth€ shift con_
trol solenoid connector and bodyground.
Chack to. open in th. rtir.
b.t^raan tha 8:l Lrtnlnll tnd tho
thift conlrol 3olanoid valva A.ls the resistance 12 - 25 O?
PCM CONNECTORS
Wire side o{ female terminals
SHIFT CONTROL SOLENOIDCONNECTOR
----!=--
FI-I1=r==--
alurvEL5f
II
Terminal side ol male terminals
14-65

From page 14-66
Check Shift Conlrol Sol€noidvalve B tor a Short Circuit:1. Disconnect the 2P connectortrom the shift control solenoidvalve assembly.2. Check for continuity betweenthe 811 and Ag or A22 termi-nals,
Replir shon to ground in th€ wirebetwe.n the 811 terminal and the3hift control solenord valvo B.ls there continuity?
Measure Shift Control Solenoidvrlve B Resistance at the Sole-noid Connector:Measure the resistance betweenthe No.2 terminalofthe shift control solenoid connector and bodyground.
Check tor ooen in the wirebetw..n thc 81 1 t€tminal ard thashift control solonoid vrlv6 B.ls the resistance 12 25 O?
, 2 ll r . 5
PCM CONNECTORS
Wire side of female terminals
SHIFT CONTROL SOLENOID
CONNECTOR
GRN/WHT
Terminal side ol male terminals
14-67

From page 14-70
Mea3uro Main3haft speed sensor
Resistance:1. Connect the ma;nshaft sPeed
sensol 2P connector,2. [/leasu re the resistancebetween the 815 and 814 ter_minals.
Run the Electical TrouH€.hootingFlowcirrt for cod. P0720 l9l.Check for loose P1CM connoctors.ll n€cesslrY, 3ubstitute a known'good PCM and racheck.
ls the resistance 400 - 600 O?
Check NM wire Continuityl1. Disconnect the 2P connectorfrom the mainshaft speed sen'
sor connector.2. Check for continuity between
the 815 terminal and the No. 1
terminal of the mainshaft
speed sensor connector.
Rgpsi. opon in thc wira bctwg€n
the 815 torminrl and th6.tain_shatt soeod lensoa,
Check NMSG Wire ContinuitYr
Check for continuity between the
814 terminal and the No.2 terminal of the mainshaft sp€ed sensorconnector,
Repair open in the wira botwGonthe 814 terminal and lhe main'shsft spo€d 3en3or.
Check for loo3o PCM connoctoB.ll neca$8ry, subditute a known-good PCM and rgchock.
PCM CONNECTOR B I25PI
Wire side oI female termlnals
MAINSHAFT SPEED SENSOR
CONNECTOR
14-71

Electrical Troubleshooting ('99 - 00 Models)
Troubleshooting Flowchart - Lock-up Control Solenoid Valve A
NOTE: Record all freeze data before vou troubleshoot.
Possible Cause
. Disconnocted lock-uD controlsolenoid valve A/B alsemblyconnector. Short or opon in lock-up conkolsolenoid valv6 A wire. Faulty lock-up control solenoidvalva A' Open in VB SOL wireFCM CONNECTORS
LGl IBRN/BLXI LG2 (BRN/BLK)
Wire side ot female terminals
LGl (BRN/BLKILG2 IBRN/8LK)
To page 1+81
a\
. OBD ll Scan Tool indic.t6 CodeP1753.. Self-diagnosis @ indicatorlight blink3 once.
Check lor a Short to Power:L Turn the ignition switch OFF.2. Disconnect the B (25P) and D(16P) connectors lrom thePCt\4.3. Turn the ignition switch ON (ll).4. Measure the voltage betweenthe Dl and 820 or 822 termi-nats.
Ropair short to powcr in the wirebstwoon tho Dl tolminal and thelock-up cor|lrol lolonoid valvo A.
Measu.e Lock-up Cont.ol Sole-noid V.lvo A R63btanc6:1. Turn the ignition switch OFF.2. Measure the resistancebetween the Dl and 820 or822 terminals.
ls the resistance 12 - 25 O?
Measure VB SOL Vohage:1. Turn the ignition switch ON (ll).2. Measure the voltage betweenthe D5 and 820 or 822 termi-nals.
Check for blown No. 15 17.5 Alfu3€ in the undordash fuse/rabybox. l{ th€ tusa ii OK, r.pair oponin the wira b€twoen th€ 05 torfti-nal and thc und€r{ash fuso/r€laybox.
Check to.loose tarminalfit in thePCM connecloa3. ll necessary,substilute a known-good PCMand rocheck.
B (25Pt ll D {16P1
B (2sPt ll D {16P1
I t25Pt D (16P1
l..
14-80