1998 HONDA CIVIC Short to ground

Electrical Troubleshoot:ng ('gg - 00 Models)
Troubleshooting Flowchart - Shift Control Solenoid Valve B (cont,dl
PCM CONNECTOR A {25PI
LGl (BRN/BLK)
IBRN/BLKI LG2IBRN/BLK)
Wire side of temale terminals
Wire sid€ ot female terminals
FCM CONNECTORS
SHIFT @NTROL SOENOID VALVEA/A ASSEMBLY CONNECTOR (2PI
.-_
1)2-.T-
I sn e tcanlwxrt
(o
YI
Terminal side oI male terminals
Check for continuity between the820 terminal and body ground,and between the 822 terminaland body ground.
Ropair opan in the wirgsb.twocn the 820 rnd 822 te.mi,n.ls and ground lG10t), and..p.ir poor ground lG10t).
Check Shift Control Sol.noidVrlve B tor a Short Ci.cuit:1. Disconnect the 2P connectorfrom the shift control solenoidvalve A/B assembly.2. Check for continuity betweenthe D2 and 820 or 822 termi-nals.
Repair 3hort to ground in tho wirebotw.en tha 02 torminsl and theshift com.ol rolonoid v.lv. B.
Meaiuro Shift Cont.ol SolonoidVrlve B Raailtrnca at the SolonoidConn€c,toa:Messure the r€sistance belweenthe No. 2 terminal of the 6hiftcontrol solenoid valve A/Bassembly connector and bodyground.
R.pl.co th. 3hift control lolenoidv!lv. A/8.lsombly.ls the resistance 12 - 25 O?
Chack for open in the wi.ebetwoon th€ D2 termin.l and the3hift control lolanoid valv6 8.
B (25P1 - llDt
From page'14-91
SH B (GRN/WHTI
\
14-92

Troubleshooting Flowchart - Countershaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot
Po$iblo Cause
. Loos€ or fsulty conneclionbetween the PCM and vehicle
hainoss' Disconnectod countersh.ft
spoed senaof connoctor. Short or opgn in counteBhaft
3Deed aensor wire. Faulty counloEhaft 3p€ed sen'
soa
COUNTERSHAFf SPEED
SENSOR CONNESTOR
Terminal side oI male terminals
FCM CONNECTOR D I16PI
rconl c
1+93
NC IBLUI
. OBD ll Scan Tool indicat6 Code
PO720.. Self-diagnosis E indicator light
blinks nin6times.
Check the countershaft sPeed
sensor installation, and check it
lor damage.
ls the countershaft speed sensor
installed properly, and not dam-
aged?
Reinstall or replace and rechock.
Measurg Counlershatt SPeed
Sgn3ol R6istance at tho Son3ol
Connector:1. Disconnect the 2P connector
from the countershaft sPeed
sensor.2, Measuro countershaft sPeed
sensor resistanca at the sensor
connector.
ls the resistance 400 - 600 O?
Chcck CounteEh.tt SPeed Sen'
sor lor a Short Circuit:1. Disconnect the D {16P) con
nector trom the PCM.2. Check lor continuity between
body ground and the D10 ter_
minal and D16 terminal indi-
vid!ally.
R6oai. short in tl|€ wi.6a bstwa€n
the D10 and D16 t.rminali end
tho countdthatt rP€od senaor.
To page 14 94
Wire side of temale terminals

Troubleshooting Flowchart - Mainshaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot.
Possible Causg
. Diaconn€cted mainshaft spoed
sen3or connector'Short or open in mainshaft
sDeed sen3or wile. Faulty main3halt speed sensor
NOTE: Code P0715 (15) on the PCM doesn't
always mean there's an electrrcal problem in
the mainshaft or countershaft speed sensor
circuit; code P0715 {15) may also indicate a
mechanical problem in the transmissjon Any
problem causing irregular countershaft to
mainshalt speed difference can cause thls
code.
lll ,..TT
(ol-i-l
tl
side oI male terminals
MAINSI{AFT SPEEDSENSOR CONNECTOR
Terminal
PCM CONNECTOR D (16P)
NMSG (WHT)
Wire side of female terminals
(cont'd)
14-95
. OBD ll Scan Tool indicates Codem715.. Sell-diagno3is E indicator indi-
cates Code 15.
Check the mainshaft and counter-
shatt speed sensors installation,
and check them for damage.
Are the mainshaft and countershaft
speed sensor installed properly,
and not damaged?
Rsinalall or replace and rocheck.
Mea3u.e Meinshalt SPeod
Sensor Residance al the Sen3or
Connector:1. Disconnect the 2P connectorfrom the mainshaft sPeedsensor.2, Nreasure mainshaft speed sen_sor resistance at the sensorconnector.
ls the resistance 400 - 600 O?
Check Mainshaft Sp.ed Sen3o.
for a Short Circult:1. Disconnect the D (16P) con-nector trom the PCM.2. Check lor continuity betweenbody ground and the D11 ter'minal and D12 terminal indi
vidually.
Bopair 3hort in the wiros b€twe€nthe 011 and D12 termin.ls rndth€ main3hett sp€€d aensoa.ls there continuity?
To page 14 96

Electrical Troubleshooting ('99 - 00 Modelsl
Troubleshooting Flowchart - Linear Solenoid (cont'dl
Check Linea. Solenoid tor aShort Ci.cuit:Check for continuity between thebody ground and the 88 terminaland B17 terminal individually.
PCM CONNECTOR A {25PI
Wire side of female terminals
From page 14 97
Repair shon in the wir6 betweenth€ 88 and 817 terminals and thelin€ar solenoid,
Measure Linear SolenoidResistance:1. Connect the linear solenoidconnector,2. Meas u re the resistancebetween the Bg and 817 termtnals,
Repair loose te.minal or open inthe wire botwoen the 88 .nd Bl7t.rmin.b end the linoar 3olenoid.
ls the resistance approx. 5.0 O?
Check for loose terminal tit in thePCM conn€ctors, lf necessary,substitut6 a known-good PCMand recheck.
LSAM (WHTI
14-98

Troubleshooting Flowchart - El Indicator Light On Constantly
PCM CONNECTOR A I32P)
Wire side of lemale terrnanals
PCM CONNECTOR D {16P)
ATP D'
25
61e 11(12
t{Iro
(YELI
Wire side of female terminals
The Dll indicator lighi is on con-stantly {not blinking) whenever
the ignition switch is ON (lll.
Moasure D4 IND Voltage:1. Turn the ignition switch OFF.2. Disconnect the A {32P} con-nector from the PCM.3. Turn the ignition switch ON (ll).
4. Measure the voltage betweenthe A14 terminal and bodyground.
Repsir short to power in the wire
between the A14 torminal andthe gauge assembly.
Measure ATP D4 Voltagel1. Turn the ignition switch OFF.2. Connect the A (32P) connector to the PCM.3. Turn the ignition switch ON (ll).
4. Shitt to any position othertha n [ql.5. Measure the voltage betweenthe D9 terminal and bodyground.
ls there approx. 5 V?
Test the A/T gear position switch(see section 23).
Check Ior a short to ground inthe wire betweon the D9 termi-
nal and A/T gear position switch.It wire is OK, substitute a known-good PCM and recheck.

Electrical Troubleshooting ('99 - 00 Models)
Troubleshooting Flowchart - E Indicator Light Does Not Come On
FCM CONNECTOR B (25P}
LGl {8RN/ALKI{BRN/8LK}
Wire side ol temale terminals
LGl IBNN/BLK} LG2 {BRN/BLK)
i2t5 6q
910t7
LG2
o) (o
The Pll indicator light does notcome on when the ignitionswitch is fi.st turned ON (ll). lltshould come on for about twoseconda.l
Check the Service Check Con-nector:Make sure the special tool (SCS
Service Connector) is not connect-ed to the service check connector?
ls the specialtool {SCS ServiceConnector) is not connected tothe seNice check connector.
Disconnect the special tool fromthe service check connector andr6check.
Check the Dll lndicator LightiShift to d position.
Check for loose terminal fit in thePCM connecto13. It necessary.sub3titute a known-good PCMand recheck.
Does the @ indicator lightcome on?
Check the Ground Circuit:1. Turn the ignition switch OFF.2. Disconnect the B (25P) con-nector from the PCM.3. Check for continuity betweenthe 820 terminal and bodyground, and between the 822terminal and body ground.
Repair open in the wiresbetween the B20 rnd 822 termi-nals and ground (G101), andrep.ir poor ground (G1011.
Measure Power Supply CircuitVoltage:1. Turn the ignition switch ON {ll}.2. Measure the voltage betweenterminals B1 and 822 andbetween terminals Bg and820.
Repair open or short in the wi.obetween th6 81 and/or 89 termi-nals and the PGM-FI main relav,and between th€ PGM-FI mainr€ley rnd the under-hood tus€/relay box.
To page 14''103
14-102

From page 14-102
Measu.e D4 IND Voltago:1. Turn the ignition switch OFF.2. Connect the B (2SPiconnector
to the PCM.3. Connect a digital multimeter
to the A14 and 820 or 822 ter-
4. Turn the ignition switch ON (ll),
and make sure that voltage isavailable for two seconds.
Chock for ooon in tho witebetween the A't4 tsrminal .ndthe gauge.3s.mbly. ll wite i3OK, chock to. a t.ulty indicatorlight bulb or. feulty gaugc
e336mbly p.inted circuit board.
Check D4 IND lor a Short Citcuit:Check lor continuity between theA14 terminal and body ground.
Rop.ir short in thc wirg b€twoenth. Al4 tormin.l .nd tho gaugo
a$ombly. ll wiro is OK. chocktho gsugo a3rambly.
ls there continuity?
Check fo. loose terminal tit in thcPCM connectoB. Chock the A/Tgear position switch. It ncce3-sary, substitute a known-goodPCM and rechock.
PCM CONNECTORS
Wire side ol female terminals
14-103

Symptom-to-Component Chart
Electrical System -'96 - 98 Models
*: The DTC in parentheses is the code @ indicator light indicates when the Data Link Connector is connected to the HondaPGM Tester.
DTC*O Indicator
LightMILDetection ltemPage
P1790
(3)BlinksONThrottle position sensor14-242
P179'l
(4)BlinksONVehicle speed sensor14-243
P1705
(5)BlinksONAy'T gear position switch (short to groundl't 4-244
P1706
(6)OFFONA/T gear position switch {open)14-246
P0725
(11)BlinksONlgnition coil14-248
P1793
112lBlinksONManifold absolute pressure sensor14-249
P 1870(30)BlinksONShift control linear solenoid14-250
P'1873
(311BlinksONPH-PL control linear solenoid14-25'l
P1879(32)BlinksONStart clutch control linear sotenoid14-252
P1882BlinksONInhibitor solenoid14-253
P1885
(34)BlinksONDrive pulley speed sensor1l-Zb4
P1886(35)BlinksONDriven pulley speed sensor14-255
P1888
(36)BlinksONSecondary gear shaft speed sensor14-256
T to55
(37)BlinksONECM or TCM14-257
P1890
l42lBlinksONShift control system14-259
P1891
(43)BlinksONStart clutch control svstem14-260
14-23a