1998 HONDA INTEGRA Workshop Manual

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
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. 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!

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u
From page 17-74
Check BAROS S Wiro tor a ShortCircuh:Check for continuity between the82 terminal ofthe TCM or the C21terminal ot the ECM and bodyground.
Ch.ck {or loose TCM and ECMconnoctots. lf n€cessary, sub3ti-tut6 a known-good TCM androchock.
WIRE SIDE OF FEMALE TERMINALS
TCM CONNECTOR B {22PI
WIRE SIDE OF FEMALE TERMINALS
14-75

. 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}

From pag€ 14-76
Ch.ck FAS Wir! for I ShoitClrc!hr1. Turn th6 ignition swilch OFF.2. Disconnect the C (31P) con-n€ctor from tho ECM.3. Chock for continuiv b€tweonth€ c9 torminal of th6 EcM c(3'lP) conn6ctor or the 819torminal of th€ fcM B l22Plconnoctor and body ground,
B.pllr rhort in th. FAS wirob.tw..n th. TCM .nd th. ECM.
Chack tor looaa TCM connactora.lf nacaaary, aubatltuta I known.good TCM .nd rach..k.
TCM CONNECTOR B {22P}
WIRE SIDE OF FEMALE TERMINALS
ECM CONNECTOR C {31PI
WIRE SIDE OF FEMALE TERMINALS
14-77

Electrical Troubleshootin g
Troubleshooting Flowchart - Mainshaft Speed Sensor
Po3aiblo causo
' Diaconnocted mrin3haft spocd30nsor connoctot. Short or open in mainshsttsoeod senSot wito. Faulty main3halt spood 3€n3ol
vNOTE: Code P0715 (code '15) on the TCM
doesn't always mean there's an electrical
oroblem in the mainshaft or countershaftspeed sensor circuit; code P0715 (code l5)
may also indicates a mechanical problem
in the lransmission.
MAINSHAFT SPEEDSENSOR CONNECTOR
TERMINAL SIDE OF MALE TERMINALS
TCM CONNECTOR B (22P)
WIRE SIDE OF FEMALE TERMINALS
\4
' OBD ll Sc.n Tool indicrt6 Codo
P0715' self-diagnosis El indicalorlight indicatos Code 15.
Check the mainshatt and counler-shaft soeed sensor installation.
Are the mainshaft and countershaltspeed sensor installed properly?
M6asure Mainshtft Spood Son'
sor Rgsi5tanco at ths Sonsol Con-
nec'tor:'t. Disconnect the 3P connectorIrom th6 mainshatt speedsensor connedor,2. Measure the rcsistance of themainshaft speed sensor.
ls the resistance 400 - 600 o?
Chock Mainshaft Speed Son3orfor a Short Circuh:l. Disconnect the B (22P) con-nector lrom the TCM.2. Check lor continuity betlveenbody ground and the 810 ter'
minal and 817 terminal indi-
vidually.
Repair 3hort in tha wi?es bttwo€ntho 810 lnd Bt? terminal3.ndtha mainshltt spaed sonaot.
To page 14-79
, 14-74
VJ

From page 17-78
Mo!3urc Mrinahaft Spced Son-sor Rosistrnco:1. Connoct the mainshaft speedsensor 3P conn6ctor.2. Measure the resista nc6between the 810 and 817 ter-minals.
Run th. ELcticrl TlouH..hootingHolrrdrart lor cod. m720 (codo 91.Chock lor looaa TCM connactor3.lf nacllg!ry, $badtuta a known-good TCM rnd i.ch.ck.
ls the resistance 400 - 600 0?
Ch.ck NM Wiro Continuity:1, Disconnect the 3P connector{rom the mainshaft sp6ed sen-sor connector,2. Check for continujty betweenthe B10 terminalandthe No. 3terminal of the mainshattspeed sensor connector.
R€paia opon in tha wir. bctwoanth. 810 t.rmin.l lnd th. m.in-3hrft apaad sanaor.
Check NMSG Wl.e Continuity:Check for continuity b€twoen theB'17 terminal and the No. 1 t6rmi,nal oI the mainshaft speed s6n-sor connector.
Rapair opan in thc wiia batwacnth6 Bl7 t.rmin.l .nd th. m.ln.3hdt rDaad aansor,
Chock lor loo3e TCM connactor.It n.cGslry, $bititutc ! known-good TCM lnd r.chock.
TCM CONNECTOR B I22PI
WIBE SIDE OF FEMALE TERMINALS
WIRE SID€ OF FEMAI"E TERMINALS
MAINSHAFT SPEEOSENSOR CONNECTOR
14-79