light HONDA INTEGRA 1998 4.G Service Manual

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14-55
Diagnostic
Trouble Code(DTC).
Ej
lndicator
Light
SymptomPossible CauseRefer to
Page
P1794
(131Blinks
. No specific symptom appears.. Short or open in LT GRN wire between
82 terminal and ECM. Faulty barometric pressure (BARO)
sensor
NOTE: BARO sensor is built into ECM.
't 4-7 4
P1786
(14)Blinks
. Transmission jerks hard when
shifting.
Short or open in FAS (YEL) wire
between 819 terminal and ECM
Faulty ECM
14-76
P0715
(15)Blinks
. Lock-up clutch does not engage,Disconnected mainshaft speed sensor
connector
Short or open in mainshaft speed sen-
sor wrre
Faulty mainshaft speed senso.
14-74
P0740
{ none,OFF. Lock-up clutch does not engage.Faulty lock-up control system14-80
P0730
I none,
. Fails to shift (between lst - 2nd,
2nd - 3rd, 1st - 4th. 3rd - 4th,
1st - 2nd - 3rd, 1st - 2nd - 4th,
1st - 3rd - 4th, or 2nd - 3rd - 4th
gears onry).. Fails to shift (stuck in 1st gears).
. Faulty shift control system
14-81
P0700
(none)
. Other automatic transmission problem (s)
Inspeclthe a utomatic transmission problem (s)accordingto the DTC (s)indicated with code m700.
(DTC)*: The DTCS in the parentheses are the codes the E indicator light indicates (blinks) when the service cnecK connec-tor is connected with the sDecialtool {SCS service connector).
NOTE: WhentheOBDll Scan Tool orHonda PGM Tester indicates the DTC(S) for the automatic transmission control sys-
tem, the scan tool or tester also indicates code P0700 simultaneously. Code P0700 means detection of some automatic
transmission problem on the PGM-Fl control system.
lf the self-diagnostic E indicator light does not blink. perform an inspection according to the table below.
NOTE:
. lf a custombr describes the symptom for code P1706 (6), P0725 (11) or P0715 (15), it will be necessary to recreate the
symptom by test-driving, then recheck the DTC,. Sometimes the E indicator light and the Malfunction Indicator Lamp (MlL) may come on simultaneously. lf so, check
the PGM-Fl system according to the DTC, then reset the memory by removing the BACK UP fuse in the under-dash
fuse/relay box for more than l0 seconds. Drive the vehicle for several minutes at a speed over 30 mph(50 km/h). then recheck the DTC.
. Disconnecting the BACK UP fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the
customer's code number, and make note of the radio presets before removing the fuse so you can reset them.
SymptomInspectionR€f. page
E indicator light does not come on for two seconds after ignition is
first turned on (ll).14-42
E indicator light is on constantly (not blinking) wheneverthe ignition is on {ll).14-84
Lock-up clutch does not have duty operation (ON - OFF).Check A,/C signal with Ay'C
on.14-85Lock-up clutch does not engage.
Shift lever cannot be moved from E position with the brake pedal
oeDresseo.Check brake switch signal.14-86

Electrical Troubleshooting
Troubleshooting Flowchart - Lock-up Control Solenoid Valve A
Po+tible Cauta
' Diaconnac'tad lock-up control
lolanoid valva A connac'toa. Shon or opan in lod(-up co|ltrol
3olonoid valva A wire. Faulty lock-up cont?ol lolanoid
TCM CONNECTORS
WIRE SIOE OF FEMAI."E TERMINALS
WIRE SIDE OF FEMA.E TEBMINAIS
L/
. OBD ll Scrn Tool indic|t.3 Cod.
P17!i:t.. Self-Dirgnoii! E indic.torlight blinkr onco.
M.Nur. VREF Voh.go:'t. Disconnect the A (26P) and B(22 P) conn€ctors lrom th€
TCM.2. Turn tho ignition switch ON (ll).
3. Nleasure tho voltage betwson
the 820 and A13 or A26 tormi-nals.
Raplir opan or 3hort in tha wi.a
b.twa.n th. B20 t.lmin!l .nd
th€ EcM.lsthere approx. 5 V?
Check tor a Short to Powa.i
Measure tho voltag€ botwoen the
A16 and A13 or A26 terminals.
Rap!fu ahorl to Pow.t in tha wlra
b!tw..n th. A16 t rmln.l rnd tho
lock-up c!filtol lolaooid valvo A.
Moaaurc Lock-uP Contlol Sole-
noid Vrlvo A Be3bianco:1. Ttrrn the ignition switch OFF.
2. Measure the rssistancebetween the A16 and A13 or
A26 terminals.
Chack tor loolc TCM conncctora.lf naca!3!ry, rub3tftuta a known'good rolcnold v.lva a$amblY ol
TCM .nd r.ch.ck.
ls the rosistanco 12 - 25 O?
To page 14-57
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14-56

Electrical Troubleshooti n g
Troubleshooting Flowchart - Lock-up Control Solenoid Valve B
Poitibl. Cau3o
. Dbconn.stsd lock-up controlsolenoid valv6 B connectol. Short or open in lock-up cont.ol3olonoid valva B wiro. Faulty lock-up conttol solcnoidvalva BTCM CONNECTORS
WIRE SIDE OF FEMALE TERMINALS
wlRE SIDE OF FEMAIE TERMINALS
Moa3ure Lock-up Control Sol.-noid Vrlv. B R$btanco:1. Turn the ignition switch OFF.2. Measure the reslstancebotween the A15 and A13 or426 terminals.
.. ls the r€sistance 12 -25A?
14-58
u,
NO
. OBD ll Scrn Tool indicrt.3 Cod.P1758.. Self-Oiagnosis E indicato.light blink3 twics.
Moasuro VREF Vohago:1. Disconnect the A (26P) and B(22P) connectors from theTCM.2. Turn the ignition switch ON (ll).
3. Measure tho voltage betweenthe 820 and A13 or 426 termi-nats.
Rapair opan or lhort in iho wirobatwaan tho 820 terminal andth. ECM.ls there approx. 5 V?
Check for a Shon to Powar:Measure the voltage between th€A15 and A13 or A26 terminals.
Rapair .hort to powar in tha wircbatr.,aon tha A15 ta.mlnal and thalock.up control rol.noid valva B.
Chack for loo.. TCM connactoB.It necassrry, 3ub3thuta ! known-good 3olcnoid valve .ir€mbly olTCM .nd r6ch.ck.
To page 14-59
*d
*,

Electrical Troubleshootin g
Troubleshooting Flowchart - A/T Gear Position Switch (Short)
Llu
Po$ible Cause
' Shon in A/T gea. position
switch wire. F.ulty A/T g€at position switch
NOTE: Code P1705 (5) is set when theTCM receives two gear position inputs
at the same time.
TCM CONNECTOR A {26FI
WIRE SIDE OF FEMALE TERMINALS
{
Measure ATP D. Voltagel1. Shift to all positions other than
o;.2. Measure the voltage betweenthe Ag and 413 or A26 termi'nals.
{
14-62
. OBO ll Scan Tool indicates CodeP1705.. S6lt-diagnosis Pr-,.. indicatorlight blinks five times.
Observe the A/T gear position
indicator:1. Turn the ignition switch ON {ll).2. Observe the A/T gear position
indicator, and shift each Posi-tion separately.
The syslem is OK at this time.Ch€ck the wite hotn€ss for dam-a9e,
Do any indicators stay on when the
shift lever is not in that position?
Measure ATP R Voltage:1. Turn the ignition switch ON (lli.
2. shitt to all positions otherthan E.3. Measure the voltage betweenthe A11 and 413 or 426 termi-nals.Check for short in ihe wire
betwe€n the 411 termin.l and theA/T gear position switch or A/Tg6ar position indicator. lf wire is
OK, check tor lo6e TCM connec-
tors. lf necessary, substitute a
known-good TCM and rech€ck.
ls there battery voltageT
Measure ATP PN Volt.go:1. Shift to all positions otherthan E or E.2. Measure the voltage betweenthe 410 and A13 or 426 terminals.
Check for 3hort in the wire
between the A10 tetminal andthe A/T gear position indicator,or a short in the wir63 betweenthe A/T gear position indicatorand A/T g€ar position switch. lfwires are oK, check for looseTCM connecto13. lf necessarv,3ubslitute a known-good TCM
and recheck.
Check for 3hort in the wirebetween the Ag terminal and thoA/T gear po3ition switch. lf wireis OK, check tor loose TCM con-neclors. ll necessary, substitute aknown-good TCM and recheck.
To page 14 63

Electrical Troubleshooting
Troubleshooting Flowchart - A/T Gear Position Switch(Openl
Po3.ible Cause
. Di"""."."i"d A/T ,"". p""iti
switch connoctor. Open in A/T ge.r position
switch wire. Faulty A/T gear position switch
TCM CONN€CTOR A (26PI
WIRE SIDE OF FEMAI.E TERMINALS
Measuro ATP D. Voltage:1. Shift to E position.2, Measure the voltage betweenthe Ag and A13 or 426 termi-nals.
ls there voltage?
14-64
BRN/BLK
NO
. OBD ll Scsn Tool indicate. CodeP1706.. Self-diagnosis E indicatorlight blinks six times.
Measuro ATP R Voltago:1. Turn the ignition switch ON (ll).
2. Shift to E position.
3. Nleasure the voltage betweenthe 411 and 413 or 426 terminals.
Repair open in the wire bctweanthe A11 te.minal and the A/Tgear position switch.
Moasure ATP PN Volt.ge:1. Shift to E or E position.
2. Measure the voltage betweenthe 410 and A13 or 426 termi-nals.
Ropai. open in the wirs betweentho A10 terminal snd the A/Tgear position indicator.
Repair open in the wire betweenthe Ag terminal end the A/T g€arpo3ition switch.
To page 14-65
VJ

Electrical Troubleshootin g
Troubleshooting Flowchart - Shift Control Solenoid Valve B
Po3sibl. Cauao
' Diaconncctad ahift controlsolanoid valve B connoc'tor. Short ol op.n in shift contlolsolanoid valvo B wiro. Faulty lhift control solonoidvalvo B
TCM CONNECTORS
WIR€ SIDE OF FEMALE TERMINALS
WIRE SIDE OF FEMAI."E TERMII{ALS
Me.sure Shift Control Solenoidvalvo B Raliatanco:l. Turn the ignition switch OFF.2. Measure the resistancebetween the 42 and A'13 orA26 terminals.
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TCM CONNECTON A (26PI
. OBD ll Scan Tool Indicrt.3 Codem758.. sell"Diagnosi3 [Q indicatorlight blink3.igl|ttlm.!.
Moasur. VREF Voh.go:1. Disconnect the A (26P) andB (22P) connectors from thoTCM.2. Turn the ignition switch ON (lll.
3. Measure the voltage betweenthe 820 and Al3 or A26 termi-nals.
R.pair opan or 3hort in thc wirab.twrqn th. 820 tormin.l and
th. ECM.ls there approx. 5 V?
Check for . Short to Powor:Measure the voltage bstween theA2 and A13 or 426termin8ls.
Rapair Bhort to power in tho wilobotwecn thr 42 laiminal and th.3hift control solanoid valvo B.
Chack lor loos. TCM connactoB.lf n.ceasary, subsiituto a known-good sol.noid valv6 tasambly olTCM rnd rech.ck.
ls the resistance 12 - 25 O?
To page 14-69
Ug

Electrical Troubleshooting
Troubleshooting Flowchart - Engine Coolant Temperature
(EGTISensor
Polribl. Cluta
. Dirconnoct.d Engin. CoollntTampaolur€ IECTI aanaor con.noctot. Short or opcn In ECT..n.or
. F.ulty ECT r.n.or
Tctrrt oot{NEcToRs
WIRE SIDE OF FEMAII TERi'IINAIS
U
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M6esur. ECT Voh.ge:1. Turn the ignition switch OFF.2. Connect the A (26P) andB (22P) connectors to the TCM.3. Start the engine and w6rm ituP to normal operating tem-pe ratu re (the radiator fancomes on),4, Measure the voltage betweenthe 83 and A13 or A26 termi-nats.
Ii
:
rt.fls there less than 1 V?
Ch.cl fo. looso TCM connac{or3,t nacaasary, substituto a known"good TCM rnd r.chock.
' OBD ll Scsn Tool Indicat6 CodeP1792.. Sett'diagno3i3 E indicatollight indicates Code 10.
Chock tor Anothor Codo or MILBlinking:1. Turn the ignition switch ON (ll).
2. Check wh€ther rhe OBD llscan tool indicates anothercode or the Malfunction Indi-cator Lamp (MlL) blinks (see
section 11).
Does the OBD ll scan tool indi-cate another code or is theMIL blinking?
Moasure VREF Voh.go:1. Turn the ignition switch OFF.2. Disconnect the A {26P) andB (22P) conneotors from theTCM.3. Turn the ignition switch ON (ll).
4. Measu.e the voltage betweenthe 820 and A13 or A26 tormi-nals.
Bap|ir open or thort in tha wircb.two.r th. B:m t.rminll .nd thoECM.
ls there approx. 5 V?
napalr opln in iha wlra brtwaanthe lB t.rminrl lnd th. ECT r.n-ao1.

. OBD ll Sc.n Tool Indicrt$ cod.m725.. S.lf.di.gnosi3 E indicetotlight indicet$ Cod. 'l 1.
Motsure NE Vohago:1. Disconnect the A{26P) con-nector from the TcM.2. Stan tha €ngine.3. Measurg the voltage betwegnthe A5 and Al3 or 426 termi-nals.
Rapair opan or lhort in tho wirabctwo6n tho AS tarminal and tholgnhion coil.ls there banery voltage?
Chack tor loose TCM connector.lf necasllry, 3ub3titule a known-good TCM snd recheck.
- Troubleshooting Flowchart - lgnition Coil
JU
Poaaible Cau3€
' Di.conn€c{od ignition coil con.nactot. Short or opcn ignition coil wira. Frulty ignition coil
WIRE SIDE OF FEMAI,T TEBMINALS
tt
tt
BRN/BLK
14-73

Electrical Troubleshooting
Troubleshooting Flowchart - Barometric Pressure (BARO) Sensor
t\l,
l
'|
. OBD ll Scan Tool lndicatos Code
P1794.. Self-diagnosis El indicator
light indicatos Code 13.
Check BAROS S Wire ContinuitY:1. Turn the ignition switch OFF.
2. Disconnect the 22P connedortrom the ECM.3. Check for continuity betweenthe 82 terminal ot the TCM
connector and C21 terminal of
the ECM connector.
PGsible cau3€
' Short ot oDen in LT GRN wite
betwoen the 82 lcrminal and
ihe ECM. Faulty baromotric PrelsureIBAROI ignsolNOTE: Tho BAFO sensor is
built into the ECM.
VqJ
WIRE SIDE OF FEMALE TERMINALS
Measure VREF Volttge:1. Turn the ignition switch OFF.
2. Disconnect the A (26P) and B(22 P) connectors from the
TCM.3. Turn the ignition switch ON {ll}.
4. Measure the voltage between
the 820 and 413 or 426 termi-
nals,
Repair shon or oPen in the wite
betwcon the 820 tsrminal and
tho EcM.ls there approx.5 V?
Repair open in the wiro betwoon
the TcM and ECM.ls there continuity?
To page 14-75
14-74
V!

. OBD ll Scan Tool indicatcs CodeP1786.. Soff-diagnGis E indicrtor lightindicat6 Codo '1,0.
M6a3ure FAS Vottago:1. Start the engine and warm itup to normal operatang temPer_6ture (the radiator fan comeson).2. shift to E position.
3. Turn the ignition switch OFF.4. Turn the ignition switch ON (ll)
and wait lor at least two sec-onds.5. Measlre the voltage betweenthe 819 and A13 or A26 termi-nals.
Chsck for loo3r TCM connactot!.lf necoslary, lubsihuto a known.good TCM rnd r.chrck,ls there approx. 5 V?
M6asuro FAs vohagoIECM sidol:1. Turn the ignition switch OFF.
2. Disconnect the B (22P) connec-tor lrom the TCM.3. Turn the ignition switch ON (ll).
4. Measure the voltage Ag andC9 terminals of tho ECM con-nectors.
ls there approx. 5 V?
Chock for loore TCM connectoE.lf noceilary, subrtitula a known-good ICM rnd rcchock.
Repair opon in the FAS wircb€(we€n the TCM snd ths ECM.
Electrical Troubleshooting
Troubleshooting Flowchart - FAS Signal
vU
PG.iblo Cru!.
. Short o. opon FAS wira. Feoltv ECM
To page 14-75
TCM CONNECTORS
WIRE SIDE OF FEMALE TERMINALS
WIRE SIDE OF FEMAI.T TEBMINAI-S
WIRE SIDE OF FEMALE TERMINALS
a
,i,I
Chock FAS Wiro Continuity:1. Turn the ignition switch OFF.2. Disconnect the C (31P) con-nector lrom the ECM.3. Check lor continuity betweenthe C9 terminal of the ECM C(31P) connector and the 819terminal of the TCM B (22P)
14-76
ECM CONNECTORS
ECM CONNECTOR C I31P}