1999 HONDA CIVIC PCM CONNECTOR A

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 ('gg - 00 Models)
Troubleshooting Flowchart - Mainshaft Speed Sensor (cont,dl
Wire side of female terminals
PCM CONNECTOR D {16PI
23/)
618
rghrll [e]
NM IREDI
(
I
NMSG {WHTI
(REDI
MAINSHAFT SPEEDSENSOR OONNECTORRED
Wire side of female terminals
NMSG IWHTI
From page l4-95
Measure Mainshatt SpeedSensor Resistance:1. Connect the mainshaft speedsensor connector.2. Measure the resistance bet-ween the Dl1 and D12 termi-nats.
Run the Electricel Troubl€shootingFlowchart lor cod6 m?m l9).Ch€ck lor loo.o te.minol fit in th6PCM connectors. lf necossary,substitute r known-good PCMend .echeck.
ls the resistance 400 - 600 0?
Check NM Wire Continuity:1. Disconnect the 2P connectorfrom the mainshaft speed sen-sor.2. Check for continuity betweenthe D11 terminal and the No. 2terminal ot the mainshaftspeed sensor connector,
Ropair opon in the wiro lratwoentho Dll tsrminal and tha main-3hatt spe€d sensor.
Check NMSG Wire Continuity:Check for continuity between theDl2 terminal and the No. 1 termi-nal of the mainshaft spoed sen-
Repai. open in the wire betwoenthe D12 terminal and the mein-shaft 3peod sansor.
Check Ior loose terminal fit in thePCM connectors. lf necesaary.substitute a known-good PCMand recheck.
1235
678
t1vNM
o
617 89ll12
Io
t1v
WHT
1
\
14-96

Troubleshooting Flowchart - Linear Solenoid
NOTE: Record all freeze data before you troubleshoot.
Poitibl. Cau3.
. Disconnacted linoaJ tolanoidconnaclol. Shorl or opon in linolr solonoid
. Flulty linoar 3olenoid. ODon in VB SOL wit.. ODen in PG linoPCftI @NNECTORS
Wire side ol female terminals
PCM OONNECTOR B I25PI
LGT (BNN/BLKI LG2 {BBN/BLKI
Wir6 side of Iemale terminals
LINEAF SOITNOID OONNECTOR
Flr-11=T=T
olYI
L_l
Terminal side of mal€ termanals
(cont'd)
B t25Pl D {16P1
. OBD ll Scln Tool indic.t.t CodoP1768.. Self-diagnosis E indicltol indi-
cat6 Cods 16.
Moasur. VB SOL Voltago:1. Turn the ignition switch OFF.2. Disconnect the B {25P) and D(16P) connectors from thePCM.3. Turn the ignition switch ON (lll.
4. Measure the voltage between
the D5 and 820 or 822 termi-
nals.
Ropair opan or thort in dla wi.9hrw..n th. D5 t.rminrl .nd th.
und.r-d.rh fu ta/r.l.y box.
Ch.ck th. Ground Circuit:1. Turn the ignition switch OFF.2. Check lor continuity betwoenthe terminals 82 and 822 and
between terminals 810 and820.
Rapair opal| in tfr wi|! batlwaoth. tcrrnln.l. 82, B10, B:20. .ndBZI .id Gt01. R.p.ir poor ground
tG10rl.
M.!sure Linea. SolenoidRcai3tancc rt tha SolanoidConn6ctor:1. Disconnect the linearsolenoidconnectol,2. Measure the resistance of thelinear solenoid.
ls the resistance approx. 5 O?
To page 14-98
1+97

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

ElectricalTroubleshooting ('99 - 00 Modelsl
Troubleshooting Flowchart - Brake Switch Signal
PCM CONNECTORS
Wire side of female terminals
Shift lever cannot be moved tromE position with tho b.ake pedaldepressod.
Check Brake Light Operation:Depress the brake pedal.
Repair t ulty brake switch circuit{see s€ction 23}.Are the brake llghts ON?
Mea3ure STOP SW Vohage:1. Turn the ignition switch OFF.2. Disconnect the A (32P) and B{25P} connectors from thePCM,3. Measure the voltage betweenthe A32 and 820 or 822 termi-nals with the brake pedal
depressed.
Repair open in the wire betwsenthe A32 terminal rnd tho brrk6switch.
ls there battery voltage?
. Brak€ switch sign.l is OK.. Check for loose terminal fil inlhe PCM conn€ctors. lf neces-sary. substitute a known-goodPICM and recheck.. InsDect the breke 3witch circuitlsee section 231.
B {25P)
\
14-104