Obd HONDA CIVIC 2000 6.G User Guide

Electrical Troubleshooting ('96 - 9g Models)
Troubleshooting Flowchart - A/T Gear position Switch (Shortl
NOTE: Record allfreeze data before you troubleshoot.
Poiriblo Caus6
. Short in A/T go.. positionawhch wira. Fauhy A/T goa. position swhch
NOTE: Code P1705 (5)the PCM receives twoinputs at the same time.
is caused whengear position
' OBD ll Scln Toot indic.tes Cod6P1705.. Sofidi.gno3b E indicato] tighrblinksfivatim...
Observo th. A/T Go.r po3ition
Indicator:1. Turn the ignition switch ON l).2. Observe the A"/T gear positionindicator, and shitt to eachposttron,
Do any indicatoG stay onwhen the shift lever is not inthose positions?
Tho sy3tem b OK.t this timo.Check th6 wilc harnari for dam-rga.
M.r.ur. ATP R Vohlge:1. Shift to all positions otherthanE.2. Nileasure the voltage betweenthe 816 and Ag or A22 tormi-nats,
Check for short in tha wirobstwacn the 816 tcrminal and th6A/T go.r porition rwitch or A/Tg..r position indicltor. It wira i3OK, ch.ck for loo!€ FCfit connoc-to13. lf nacetaary, subrtitute aknown€ood Pcllt and roa|rsck.
ls there battery voltage?
Meesur. ATP NP Vohage:1. Shift to allpositions oth€r thanEorE.2. Moasure the voltage betweenthe 825 and A9 or A22 terminats.Check for short in the wireb.tw..n th6 B:I5 torminrt and th.A/T gclr poahion indicator. o. .short in tha wirrs between th.A/T gclr position indicator rndthe A/T gerr poiition switch. lfwir.3 r.o OK, chack tor loosoPCM conn.ctorr. It n.cosarry.sub.tituto a known-good pCM.nd r.chock.M.Gur. ATP D4 Voltago:1. Shift to allpositions otherthanlD.l.2. Measure the voltage betw€enrhe 824 and Ag or A22 termi-nals.
Check tor 3hort in tho wirobc{wocn the 824 terminrl and thoA/T ge.r poiition switch. lI wileia OK, chock tor loo3o plCM con-ncctoaa. It nacossarv, sublthute aknown-good PCM and rech€ck.
ls there approx. 5 V?
PCM CONNECTORS
Wire side of female terminals
YES
To page 14-6':
14-60

Electrical Troubleshooting ('96 - gg Modelsl
Troubleshooting Flowchart - A/T Gear position Switch (Open)
. OBD ll Scan Tool indicates CodeP1706.. Self-di.gnosk E indicator tightblinks six timos.
Measure ATP 04 Voltege:1. Shiftto E position.2. Measure the voltage betweenthe 824 and A9 or A22 terminals,
ls there voltage?
Possible Causo
. Disconnected A/T gear positionswitch conn€ctor. Open in A/T gear positionswitch wire. Faulty A/T gear position switch
Wire side of female terminals
NOTE: Record all freeze data before you troubleshoot.
Moasure ATP I Voltage:1. Turn the ignition switch ON 1 ).2. Shift to E position.3. Measure the voltage betweenthe B'f6 and Ag ot A22 tetmi-nats.
Ropai. op€n in the wire betwe€nthe Bl6 terminal.nd the A/T gearposition swhch.
Measur€ ATP NP Voltage:1. Shift to E or E position.2. Measure the voltage betweenthe 825 and A9 or A22 termi,nals,
Repeir open in the wir€ betweentho B25 terminal and th6 A/T geerposition indicator or tho A/T 96.rposition 3witch.
Rcpair open in the wire betweentto 82{ to.minal and th6 A/T geatlrosition 3witch.
To page 14 63
PCM CONNECTORS
NO
1
L
+62

Electrical Troubleshooting ('96 - 98 Modelsl
Troubleshooting Flowchart - Shift Gontrol Solenoid Valve A
Po$ible Cau3e
. Disconnected shift controlsolenoid valve A connector. Short oi open in shift controlsolenoid valve A wire. Faulty shirt control solenoid
PCM CONNECTORS
' OBD ll Scan Tool indicates CodeP0753.. Sett{iagnosis E indicator lightblinks seven tim6.
Check tor a Short to Power:1. Turn the ignition switch OFF.2. Disconnect the A (32P) and B{25 Pi connectors trom thePCM.3. Turn the ignition switch ON {ll).4. Measure the voltage betweenthe 83 and A9 orA22 terminals.
Repair short to powe. in the wir6between the 83 terminal .nd theshift control solonoid valvo A.
Moa3ure Shift Control SolenoidValve A Resistanc€:1. Turn the ignition switch OFF.2, Measure the resistancebetween the 83 and A9 or A22terminals.
Ch€ck for loose PCM connectors.lf n€c6srry, subatitute a known-good solenoid valve a3,sembly orPCM end rocheck.
ls the resistance 12 - 25 0?
NOTE: Record all freeze data before you troubleshoot.
A t32Pl
To page 14-65
Wire side ol female terminals

Electrical Troubleshooting ('96 - g8 Modelsl
Troubleshooting Flowchart - Shift Control Solenoid Valve B
Possible Cause
' Disconnected shift controlsolenoid valve I connectol. Short or open in shift controlsolenoid valve B wire. Faulty shift control 30lenoidvalve B
PCM CONNECTORS
Wire side ot female terminals
. OBD ll Scan Tool indic.tes CodeP0758.. Solt-diagnosis E indicator lightblinks eight times.
Chock for a Short to Power:1. Turn the ignition swatch OFF.2. Disconnect the A (32P) and B(25P)connectors from the PCM.3. Turn the ignition switch ON (ll).4. Measure the voltage betweenthe 811 and Ag or A22 termi-nals,
Repair short to powar in the wirebotwcen the 811 torminal andthe shift control solenoid valve 8.
Measure Shift Cont.ol SolenoidValve B Resktance:1. Turn the ignition switch OFF.2, Meas u re the resistancebetween the Bll and A9 orA22 terminals.
Checl for loose PiCM connector3.lf nec€ssary, sub3titute a known-good solenoid v.lve assembly olPCM and recheck.
ls the resistance 12 - 25 O?
NOTE: Record allfreeze data before you troubleshoot,
A t32P)
To page 14 67
\

Electrical Troubleshooting ('96 - 98 Modelsl
Troubleshooting Flowchart - Mainshaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot.
Po$ible Cause
. Disconnect€d mainshaft sD€edSensor @nnoctot. Short or open in mainshattsJt€ed s6nsoa wire. Faulty mainshaft lpeed s6nso.
NOTE: Code P0715 (15) on the PCMdoesn't always mean there's an electricalproblem in the mainshaft or countershaftspeed sensor circuit; code P0715 (15)may also indicate a mechanical problemin the transmission.
MAINSHAFT SPEEOSENSOR CONNECTOR
Terminal side of male terminals
PCM CONNECTOR B I25PI
. OBD ll Scan Tool indicates Codem715.. Self-dirgnosi3 E indicatorlight indicstes Code 15.
Check the mainshaft and counter-shaft speed sensor installation.
Are the mainshaft and countershaftspeed sensor installed properly?
Moasure Mainshaft Spoed SgnsolRosistance at the Sensor Con-n€ctor:1. Disconnect the 2P connectorfrom the mainshaft speed sen-sor connector.2. Measure the resistance ot themainshaft speed sensor.
ls the resistance 400 600 O?
Check Mainshaft Sp6ed Sensorfor a Short Circuil:1. Disconnect the B {25P) connec'tor lrom the PCM.2. Check for continuity betweenbody ground and 815 terminaland the 814 terminal individu,
Repai. shon in the wi.os bstwoenthe 815 and 814 te.minals andthe mainshatt .Dood 3ensor.
ls there continuity?
To page 14-71
14-70
Wire side of female terminals

Electrical Troubleshooting ('96 - 98 Models)
Troubleshooting Flowchart - Lock-up Control System
NOTE: Record all freeze data before vou troubleshoot.
Possible Cause
Faulty Lock-up cont.ol system
NOTE: Do not continue with this troublesnoonnoother DTCS have been corrected.until the causes of any
. OBD ll Sc6n Tool indicatG Codem7{0.. Self-diagnosis E indicator lightindicates Code 40.
Check tor Another Code:Check whether the OBD ll scantool or the E indicato, lightindicates another code.
Perform lhe Troublo3hooiingFlowchart tor the indicatedCode(s). Recheck for cod. P07il0lilol aftor iroubl€3hooting.
Does the OBD ll scan tool orthe E indicator light indicateanother code?
Tast Line Pressure:Measure the line pressure (seepage 14-119 and 14-120).
Repair tho hydreulic aystem a3necessary {3ee page 14-119).
Replace the Lock-up ControlSolenoid Valve Assembly andR6check;1. Beplace the lock up controlsolenoid valve Ay'B assembly(see page 14-105).2. Turn the ignitaon switch OFFand reset the PCM by removing the BACK UP (7.5 A) fusein the underhood fuse/relaybox for more than 10 seconds,3. Using the scan tool, check tobe sure that the engine coolant temperature is in 176'F(80'C) and above.4. Drive the vehicle at 55 mph(88 km/h) constantly for morethan one minute.5. Recheck for code P0740 (40).
Does the OBD ll scan toolindicate code P0740 {40)?The systom k OK at this time.
l'.
14-74

Troubleshooting Flowchart - Shift Control System
NOTE: Record all freeze data before vou troubleshoot.
Possible Cause
Faulty shift control system
. OBD ll Scan Tool indicates CodeP0730.. Sell-diagnosis E indicator
light indicates Code ill.
Check tor Another CoderCheck whether the OBD ll scantool or the E, indicator lightindicate another code.
Perlorm ths TroubleshoolingFlowch.rt for the indic.t.dCode(sl. Recheck tor code m730
l4'l I atter troubleshooting.
Does the oBD ll scan tool orthe E indicato'. tight indicate another code?
Test lst, 2nd, 3rd and 4th Clutch
Pressure:Measure the 1st, 2nd, 3rd and 4th
clutch pressure (see page 14119
thru 14-121).
Ropair the hydrlulic systom !snecessary {see page 14-1 19 and11-1211.
ls each clutch pressure within
the service limit?
Replace Shift Control Solenoidvalve Assembly, Linear SolenoidAssambly and Rechock:1. Replace the shift controlsolenoid valve A'/B assembly(see page 14-106).2. Replace the linear solenoidassembly lsee page 14 108).3. Turn the ignition switch OFFand reset the PCM memory byremoving the EACK UP (7.5 A)tuse in the under hood fuse/relay box for more than l0
seconds,4. Drive the vehicle at over 12mph (20 km/h) in 1st, 2nd,3rd
and 4th gear for more than 30seconds at P1 position.
5. Recheck tor code P0730 (41).
Does the OBD ll scan tool orthe Ed indicator tight indi
cate code P0730 {41)?
The swt6m is OK et this time.
NOTE: Do not continue with this troubleshooting until the causes ot any
other DTCS have been corrected.

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

Electrical Troubleshooting ('99 - 00 Models)
Troubleshooting Flowchart - Lock-up Control Solenoid Valve B
NOTE| Record allfreeze data before you troubleshoot.
Possibla Cause
. Oisconnected lock-uD controlsolenoid velve A/B assemblyconnector. Short or open in lock-up controlsolenoid valv€ B wire. Faulty lock-up control solenoidvalve B' Open in VB SOL wirercM CONNECTORS
To page 14-83
' OBD ll Scan Tool indic.tes CodeP1758.. Self-diagnosis E indicatorlight blinks twice.
Chack for a Short to Power:1. Turn the ignition switch OFF.2. Disconnect the I (25P) and D(16P) connectors from thePCM.3. lurn the ignition switch ON (ll).4. Measure the voltage betweenthe D3 and 820 ot 822 tetmi-nals,
Repair short to power in the wirebetween the D3 terminal and thelock-up contlol solenoid valve B.
Measure Lock-up Control Sole-noid Vdlve I R8i3tance:1. Turn the ignition switch OFF.2, Measure the resistancebetween the D3 and 820 or822 terminals.
ls the resistance 12 - 25 O?
Measure VB SOL Voltago:1. Turn the ignition switch ON lll).2. Measure the voltage betweenthe D5 and 820 or 822 termi-nals.
Check for blown No. 15 {7.5 Alfus€ in the under-dash luse/releybox. It the fuse is OK, repair openin the wir6 between th6 DS terminal and the under-dash fuse/rebyoox,
ls there battery voltage?
Chock for loose te.minal fit in thePCM connectors. It necessary,substitute a known-good PCMend recheck.
B t2sP) ll D t15P)
Wire side ol female terminals
I {2sPt ll D (16Pt
B (25P1 D t16Pt
\
14-82

Electrical Troubleshooting ('gg - 00 Models)
Troubleshooting Flowchart - A/T Gear position Switch (Short)
NOTE: Record all freeze data before you troubleshoot.
Po$ible Cause
' Short in A/T go.r positionswhch wire. Faulty A/T goar position switch
NOTE: Code P1705 (5)the PCM received twoinputs at the same time.
is caused whengear position
PCM CONNECTORS
LGl (BRN/BLK) LG2 (BRN/BLKI
Wire side of femaleterminals
B {25P1 llD (16P1
. OBD ll Scan Tool indicrtB CodeP1?05.. Solt-diagno3i3 E indicatorlight blink. tive times.
Observo the A/T Gear PositionIndicetori1. Turn the ignition switch ON fit).2. Observe the lVT gear positionindicator, and shift each posi,!on separately.
Does any indicator stay onwhen the shift lever is not inthat position?
The sFtom is OK at thi3 time.Check the wi.e harness for dam-aga.
Do all gear position indicatorsgo out?
Moasure ATP R Voltage:1. Shift to all positions otherthanE.2. Measure the voltage betweenthe DG and 82O o( 822 terfii-nats.
Check tor short in the wirebatwoen tha DB terminal and theA/T go.r porhion switch or A/Tg6ar po3ition indicator, andchock for opon in the wiresbetween the B20 and B22 t€rmi-n.ls and body ground (G10 . tfwir€c rro OK, chsck fo. loo3e tel-ftinal fit in the FCM connectors. llnoceisary, substiiute e known-good FCM and r€check.
ls there battery voltage?
To page 14-85
\
14-84