connector or terminal HONDA INTEGRA 1994 4.G Owner's Manual

Disconnect the "B" connectorfrom the ECM only, not the mainwile hatness.
Turn the ignition switch ON.
Block tho right front who€l andslowlv rotate l6ft front wheel andm€asure voltage between 8'l Ol+) terminal and A26 (-)
terminal.- Roo.ir lhort in ORt{wire belween ECM18101 tnd rhs VSSor cruia6 controlunit.- ncp.i. op€n in ORI{wira botwoan ECM(8101 and the vSS.- It wir. i! OK, totttho vSS. lsoc aec-tion 231
Doos voltage pulso O V and'to v?
SubrtituL . known-good ECil lndEch.ck. fi lynptom/ndcltbn gp..
rw!y, .rpleco lh. original ECM.
(From page 1 1-68)
1 1-69

PGM-FI System
A/T Fl Signal A/B (A/T only)
\[l0l- The Maltunction Indicaror Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 30: A problem In-L= the A/T Fl Signat A circuit between Transmission Control Module (TCMI and ECM.
tItil- The Malfuncrion Indicaror Lamp {MlL) indicates Diagnostic Trouble Code {DTCI 31: A problem In-Li!- the A/T Fl Signal B circuit between Transmission Controt Module (TCM) and ECM.
\.__r_/ \.__r_/-l 30 l- o'-l 3t l------ /----\
84'
+ulty? Continuity?
r: code 31 1A/T Fl signal Bl
11-76
Wlth tho SCS ahon connocrolconi|ocd {!o. p.g. 'l 1 -341, codo3O and/or 31 ars indicltod.
Oo ths ECM Resot Proceduro {seepag€ 'l 1-35).
Test drive necessary.Drive the car lor several miles sothat the transmission uDshifts anddownshilts several times.
Intormittant tsilu.o, sy3tem iB OKat thir tima,Chack lor poor connactions otl.ro!€ wiror at C419 (TCM] andECM.
Does the MIL indicare code30 and/or 31?
Turn the ignition switch OFF.
Connect the test harness to th€main harness only, not to the ECM(see p8go l'l-37).
Disconnect the 22P connectorfrom the TCM.
Check lor continuity between B3andlor 84' terminal and bodygrouno.
Ropair lhon in GRN/8LU or GRY'wiro b6twoon ECM (83 or 84'land tho TCM.
(To page 11-77)

ldle Control System
Alternator (ALTI FR Signal
This signals the ECM when the Alternator (ALT) as charging.
D9 l+)
Inspection ot ALT FR Sign.l.
Connect the tost harness betweenthe ECM and connectors. Discon-nect "D" connector from themain wire harnoss only, not theECM lsee page 11-37).
Turn the ignition switch ON.
Measure voltage between D9 (+ )terminal and A26 {-}terminal.
Sub{inno s known-good ECMand redrack. It pro.ctibod volt gola now availablg, ropllco tha orlg-inal ECM.
ls there approx. 5 V?
Turn the ignition switch OFF.
Reconnect "D" connector to themain wire harness,
Start tho engino. Hold the engine
!L3,099 rpm with no load (A/T in
LN] or El position, M/T in neutral)until the radiator tan comes on,rhen let it idle.
Measuro voltage between Dg (fl
terminal and 426 (- I terminal.
Does the voltage decreasewhen headlights and .eardelogger are turned on?Turn ths ignition switch OFF.
ALT FR rignal is OK.
o oo oo o ooooo
ooooooooooo
Voh.go?
ooooooooooo
ooooooooooo
1 1-86
(To page 1 1-87)
=-

(From page 1 1-86)
Disconnect tho nsgstive bafterycable from the baftery.
Check for continuity betwe€n D9terminal and body ground.
Check for continuity betwoan D9te.minal and body ground.
soe AIT Inrpactlon(... r.ctlon 231.Check lor continuity between D9t€rminsl snd body ground.
Rop.lt C|on in WHT/RED wi.. b.-tw.on ECM lDgl rnd ALT.
Sao ALT inapactionlres .lctlon 231.
Disconnect "D" connector lromECM only, not the main wireharnesa,
Ropair op€o in WHT/RED wito b6-tween ECM {D9} .nd .ltomrtor.
Continuity?
11-87

ldle Control System
Automatic Transaxle {A/Tl Gear Position Signal {A/T onlyl
This signals the ECM when the transmission is in @ or @ position.
appror. 5 V?
1 1-88
-.
87 l+)
ooooooooooooo
oooooooooooo
A26 {-}
Turn the ignition switch ON.
obsorve the A/T shift indicatorand s eiecl each positionseparately.
Soo A/T goa. position indicator in-spoqtion ls6o lection 141.
Turn the ignition switch OFF.
Connect the test hamess betweenthe ECM and connectors. Discon-nect "B" connoclorlrom the mainwire harness only, not the ECM(see page 11-37).
Turn the ignition switch ON.
Measure voltage between 87 (+ Iterminal and 426 1- ) terminal.
Subslituto . known-good ECM6nd .ech6ck. lf pr63cribod voltageia now availablo, rcplaco ths o.ig-inel ECM.
ls there approx. 5 V?
Turn the ignition switch OFF.
Reconnect "8" connector lo lhemaan wire harness.
(To page 11-89)

ldle Gontrol System
Startel Switch Signal
This signals the ECM when the engine is cranking.
BATTERYVOLTAGE?
NOTE:a M/T: Clutch pedal must beoeprgsseo.a A/T: Trsnsmission in lll or LIJ position.
11-92
ooooooooooooo
oooooooooooo
A26 {-}Connect the lest harness botweenthe ECM and connector (see page
11,37).
Measure voltage between 89 (+)
terminal and 426 (-) terminalwith the ignition switch in thestart position.
Inspect No. 18 STARTER SIGNAL{7.5 A) fuse in the under-dashfuse/relav box.ls there batterv voltage?
- Roplac. No. 18STARTER SIG AL(7.5 A) lurc,- Rrpsir lhort In BLU/WHT wir. batwccnECM (89) .nd No.18 STARTER SIG.t{AL {7.5 Al 1u..,PiGM-Fl fi.ln rol.y.
R.palr opon in BLU/WHT wir6 b6-tw€.n ECM lB9l and t{o, 18STARTER SIGNAL 17.5 Al lu.o.
Startor .witch .ign.l is OK.

Power Steering Pressure (PSP) Switch Signal
This signals the ECM when the power steering load
-;"nection.*."------'.ill]
--
;;;;;;;l w
;:"r"tffa;i'
connecrors (see
Turn the ignition switch ON.
Measure voltage between 88 {+ )terminal and A26 {-) terminal.
is high.
o ooooo oooo ooo I oo ooo oo o l.Do€d(iltl ooooooooooo
o oooo ooo ooooQ I oooQ oo oo $aG$ast.l oooooooo oo
A26 l-) Bg l+l
L6s! thsn l.O V?
wire side
Turn the ignition switch OFF.
Disconnect the 2P connector tromthe PSP switch.
ls there less than 1.0 V?
Tu.n the ignition switch ON.
Turn steering wheel slowly.ls there less than 1.O V?
Measure voltage between B8 (+)
terminal and 426 (-) termanalwhile steering wheel is turning.
Ropair opon in GRN wire betwssnECM {88} and PSP srYilch ot BLKwi.o botw6cn PSP switch andG301 (locatod at loft ongin6 com-partm6ntr.
Disconnect the 2P connector lromthe PSP switch.PSP switch signal is OK.
Repair short in GRN wi.e botwoonECM {881 and PSP switch.ll wiro i3 OK, substitute a known-good ECM and.ocheck. lIproscribod vollage is now available, replaco tho original ECM.
GRN
PSP SWITCH
11-93

Fuel Supply System
Fuel Injectors (cont'd)
(From page 'l1-103)
Turn lhe ignition switch OFF.
Reconnect the 2P connector tothe tuel injector.
Connect the test harness betweenrhe ECM and connectors {seopage'11-371.
Turn the ignition switch ON.
Measure voltage between A23{-) terminal and followingterminal:. No. 1 tuel injector:A1 (+ ) terminal.. No. 2 fuel injector:A3 {+ I terminal.. No. 3 fuel injector:A5 {+ ) terminal.. No. 4 fuel injector:A2 {+ ) terminal.
Ropair opon in the wi.o betw6onth6 ECM (A1, A3, A5 or A2l andth6 tuel iniector.
Sub3titute a known-good ECMand r6chock. lf symptom/indica-tion goes away, .eplsco tho origi-nal ECM.
oooooooooo
oooooooooooooooooooo
oooooooo
ooooooooooo
ooooooooooo
A3{+)
A2{+}
11-104

(From page 'l'l-1121
Roplir op.n in GRI{/BLU wirc bo-tw..n ECM lATl lnd PGM-FImain rolay.
Measure the voltag€ betweenA23l- ) t€rminal and the tollow-ing t€rminals; A25 (+ ) Bl (+ ).
- Ropair opon in rh. YEL/BLKwir. @ b€twoon the ECM1A25, 8tl .nd PGM-FI mrinraLy.- Roplsc. ttro PGM+I min ru4.y.
Turn the ignition switch OFF.
M€asure the voltage betw€en A7(+)torminal and A23 { - } t€rmi-nal when the ignition switch isfirst turned ON for two soconds.
Subrlitutc . known{ood ECM.nd 6chock. lf p..crib.d volt.g.ir now avallablo, rodaco lha otlgi-nsl ECM.
ls there 1.O V or l€ss?
Chod. th6 FGM-FI fioin relay {3o.p6g6 11-1111.
Turn the ignition switch off.
Connect the test harnoss b€tweenthe EcM and conneclors.Oisconnect "A" connector tromthe ECM onlv. not the main wireharness (see page 1'1-37).
Check forGRN/BLUlermrnal.
continuity betweenterminal O and A7
YES
Reconn€ct "4" connector to theECM.
Turn the ignition switch ON.
Bstt.ry vohago?r-----r_-lA23 (-l A25 Bl
Brttaiy voftago?
a7 (+l A23A23 (-)
11-113

(From page 1 1-124)
Raise engine speed to above6,000 rpm.
Disconnect the 2P connector tromthe IAB control solenoid valve.
Turn the ignition switch OFF.
Check for continuity to ground onthe PNK/BLU wire.
Ropair short to g.ound
at PNK/BLU wiro bo-two6n ECM {A17) andtho 2P connector.
ls there continuity to ground?
Substituto a known-good ECMand racheck. It symptom goos
swsy, roplace tho original ECM.
{From pago 1 1-124}
Repsir op6n in YEL/BLKwiro botwoon tho 2Pconnector and FGM-FImain relaY.
ls there battery voltage?
Turn the ignition swirch OFF.
Connect lhe test harness betweenthe ECM and connectors lseepage 11-37).
Turn the ignition switch ON andconnect a lumper wke betweenECM (A17) terminal and ECM
{A26) terminal.
Ropaiiopon inP K/BLUwiao botwoen ECM
lAl7l and tho 2P con-nectot.
Ooes the solenoid valve clickwhen the jumper is con-nected?
Sub3titute a known-good ECMand rechock. lf symptom/indica-tion goos away, r6place tho origi-nal ECM.
Check lor vacuum at #'l3 vacu-um hose.
IAB control syst6m is OK.
11-125