Page 98 HONDA INTEGRA 1994 4.G Owners Manual

ECT SENSOR
GRN/BLU {-}
Turn the ignition switch ON.
Measure voltage betweon RED/WHT and body ground.
Measure voltage between RED/WHT {+}terminal and GRN/8LU(- ) terminal.ls there approx. 5 V?
ls there approx. 5 V?Ropai. opon in GRN/BLU wiro botwoon ECM(D221 and tho ECT36n3('r.Turn the ignition switch OFF.
Sub3tituto a known-good €CMand rochock. lf 3ymptom/indica-tion go6s away, roplaco the odgi-nal ECM.
Oisconnect the 22P connectortrom the Transmission ControlModule (TCM).
Turn the ignition switch ON.
ls there approx. 5 V7
Turn the ignition switch OFF andreconnect the connector to theTCM.
Connect the test harn€ss "D"
connector to the ECM only. not tothe main wire harness {see page11-37).
Turn the ignition switch ON.
Measure voltage between D13(+) terminal and D22 (-l ter-mlnal.
Repair opoa or shon inREO/WHT wiro botwoen ECMlDl3l and th6 ECT sonsor.R6pair shon in REO/WHT YYi..b6tw66n ECM {D131and TCM.
ls the.e approx. 5 V?
Substiluto a known-good ECMand rochock. ll lymptom/indica-tion goea 6wsy, replaco tho o.igi-n6l ECM,
A/T only
I
_i
11-59

.:-\.-----ll@l--l t l- The Malfunction Indicator Lamp (MtL) indicatee Diagnostic Trouble Cod€ (DTC) 7: A problcm inrhe Thronle Position (TPl Sonsor circuit.The TP Sensor is a potsntiometer, lt is connected to the throttle valve shaft. A8 the throttlo position chan96, the throttlopositaon sensor varies the voltage signal to the ECM.
BBUSHHOLDER
PGM-FI System
Throttle Position (TPl Sensor
OUTPUT VOLTAGE IV)
BNUSH
RESISTOF
IXNOTTII
TERMIIIAL;0rr- of€ no
THNOTTIE
YEL/aLU l+l TP SEITSOR
I
a
t
t
Io.|o
RED/BLK {-I
cnn/BLu I - l
)ran1 )ril-Y- -?..
- Th. MIL h.. baln rlport d on.- With th. SCS thort conn.ciolconn.c-ted (rco pngc 11-341.codo 7 i. indlc.t d.
Do the ECM Reset hocedure (se€page l 'l-35).
l. ..mrtt nt fClur., lyrt m la OX.t thb dm. ll.at drlv. rn.y brncoaataryl.Chack lor poo? connactlo|ra otloora wlr.r !t C223 lloc.t d !tdgtn drod( tow..t, Cl15 ITP ...t-rorl, C419 (TCMI .nd ECM.
ls the MIL on and do€s itindicats codo 7?
Turn th€ ignition switch OFF.
Disconnect tho 3P connector lromth€ TP sensor.
Turn the ignition switch ON.
Meosu.o voltage betwoon YEL/BLU (i ) terminal and GRN/BLUI -, torminal.
Measurs voltagG betw66n YEUBLU (+l terminal and bodygiound.ls there approx. 5 V?
(To page 1 1-611
11-60
(To page 1 1-6'l )
,,,----

(From1 1-60){From
A/T only
Turn the ignition switch OFF.
Connect the test harness betweenthe ECM and connectors (seepage 11-37l-.
Turn the ignilion switch ON.
Measure voltage between D1 1 {+ )terminal and 022 (- I terminal.
Turn the ignition switch OFF.
ls voltage approx. O.5 V at lullclose throtlle. and approx. 4 vat full open throttle?NOTE: There should be asmooth transition as the throt-tle is depressed.
Disconnect the 22P connectorfrom the Transmission ControlModule (TCM).
lurn the ignition switch ON.
Substitute a known-good ECMand roch6ck. ll symptom/indica-tion 9063 away, roplaco th6 origi-nal ECM.- Replaco tho TPaonsoa,- Repai. opon or ahonin RED/BLK wir. b€-twoon ECM lDl1l,TCM 6nd TP sonsor.
ls voltage approx. 0.5 V ar fullclose throttle, and approx. 4 Vat tull open throttle?NOTE: There should be asmooth transition as the throt'tle is deprossod.
page 1 1-60)
Repsir op.n in GRN/8LU wii6 botwoon ECMlD22l snd tho TPaenaot.
ls there approx. 5 V ?
Turn the ignition switch OFF.
Connect the test hamess betweenthe ECM and connector {see page11-37).
Turn the ignition switch ON.
Measure voltage between D2O{+) terminsl and D22 {-}termtnal,
Ropoi. open in YEL/BLUwire bgtween ECM{D20} and rho TP30naot.
ls there approx. 5 V 7
-ReDai. ahort in YEL/BLU wiroborwoon ECM (D2Ol and tho TPson30t.-Sub3tituto a known-good ECM6nd rochock. It prcacribod vol-t6go is now availablo, roplacoth6 original ECM.
Fr. o.5 v n tua .b drdn ?
11-61

{From pag6 l1-62}
Turn the ignition switch ON.
Messuro voltage b€tw€6n RED/YEL (+) terminal and bodyground.
M€asurs voltage between RED/YEL {+) rerminal and GRN/BLU{ - I terminal,ls thore approx. 5 V ?
Rsp.lr op.n in GBt{/8LU wir bctwo.r ECM
lD22l snd tho IATaanaor.
Turn the ignition switch OFF.ls thero a99rox. 5 V ?
Sub.lhul. a tnown{ood ECMlnd rachack. It rymptom/lndlc!-don gort arv.y, t pl.c. dr! oilgl-n.l ECM.
Rap.lr opon or rhon In REDfYELwh. b.tw..n ECM lDl5l rnd th.lAf tcrrao.-ls th€re spprox. 5 V ?
Connsct lhg t€st hamess "D"
connoctor to the ECM only. not toth6 main wire harness lsse page
11-371.
Turn tho ignition switch ON.
Mgasur€ voltag€ bstwgon D15(+) terminal and D22 l-ltgrminal.
S0brlitrrt. . lnown{ood ECM'|d '. 1 1-63

PGM-FI System
Barometric Pressure (BAROI Sensor
fAl- f;ff: The Maltuncrion Indicator Lamp (MtL) indicates Diagnostic Troubte Code (DTCI 13: A probtem inL--:g the Barometric Pressure {BARO) Sensor.
The BARO Sensor is built into the ECM.
-.+.-- \--r- /
t(gt -t 13 t-/'\/_i-\
- Tho MIL has booo reponod on.with th6 scs Short COnnOCtO.connoctod (aeo psgo 11-34),cod€ 13 is indicatod.
Do the ECM Reset Procedurc (seepage 1'l-35).
Turn the ignition switch ON.
Intormitt€nt trluro, sys-tem is OK !l this timo{le!t driv6 msy bonecoSaaiy).
ls the MIL on and does it indicatecode 13 ?
Substituto . knorvn-good ECMand reck6ck. lt symptom/indicr-tion goes away, roplaco th6 origi-nal ECM.
11-64
lrl$fiiHrfi.

PGM-FI System
lgnition Output Signal
i16;11 :ffi1 The Malfunction Indicator Lamp (MlLl indic8tes Diagnostic Trouble Code (DTC) 15: A probl€m in'--=-- . -r- t the lgnition Output Signsl circuir.
I
NOTE| ll the onoine won't stan. itmay take 20 seconds ot cranking to5€t th€ COde.
D|STNIBUTOB
wir6 sido
- Th. MIL hsr b..n roport.d od.- Widr ths SCS .hon cohnecto.connoct€d {..o plgo 11-341,codg |5 i! indicatrd.
Do the ECM Reset ftocedure (seepage 'l'l-351.
Intarmltt nt hllur.. ryltam i. OK!t drlr dm. (t |l drlva mly bonaoaaalry).Chack tor Door cmnactiona orloo|. rYlrar !t C223 llocltld !trlghr .hoct tow.rl, Cl10 (lCMl.nd ECM.
ls th€ MIL on and do€s it indicatecode 15 ?
Turn the ignition swirch OFF.
Turn the ignition switch ON.
Measure voltage betwoon BLK/YEL (+) terminal snd bodygrouno.
R.p.ir op.n In BLK/YEL wlr. bo-ftvarn th. 2P conn.cior lnd ioni-tion rwitch.
ls the.e battory voltage ?
(To page 11-67)
11-66
re*,

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
Electrical Load Detector (ELDI
tft;-]/ The Maltunction Indicaror Lamp (MlL) indicatss Diagnostic Trouble Code IDTC) 20: A probtem in-Li!- tne Electrical Load Detecror {ELD} circuit.
With lho SCS lhon connectolconnoctod {ree pago 11-34}, cod.20 is indicatod.
Do the ECM B6set Procedurs {seepage 1 'l-35).
Start engine and keep engin€speed at idle.Turn on headlights.
lntennlna tlllure, lyrtom lt Ol(!t irl. dm. (lgtt driv. mly [email protected] for Door connactlona oaloota wiro. rt C218 IELD, lndEctrt.
Ooes the MIL indicato code 20?
Romove the undgr-hood fusg/relay box and remove the tus6/relav box lowet cover.
Turn lhe ignition switch ON.
Measure voltage betw€on BLK/YEL (+l terminal and BLK (-)terminal.
Msasuro voltag€ b€tweon BLK/Y€L {+) terminal snd bodvground.ls there bartory voltagel
Rcpir oo.n in BLK wir.batwaan lha 3P connrc-tor lnd G2Ol {loc.t.dtroit ot angh|. comprn-m.r dghl .ld.l,
B.p.lr op.n in BLKrYEL wlrr b.-tw..n o.24ACG (ALn flcl115A: Bl88l .ngln!, 20 A:818C1cnginol fu!. In thr und.r{..htu.o/r.lly bor lnd tho 3P con-rcclo?.
View tromwire side
BLK (-)
(To page 11-7'l)
GRn/iED I - |
BLK/YEL I + I
11-70

(From pog6 1 1-7Ol
Meaauro voltage betweon GBN/RED ierminal and body ground.
Boplir opon 01lhort in GR /REDwir. batworn ECM (DlOl and tho
3P connoctor.1l wir. i! OK, .ubrtituta. known-good ECM .nd rochock.
13 the.e approx, 5 V?
Turn tho ignition switch OFF.
connect tho loat hamasa botweontho ECM and connectors (soa
pag€ 11-37),
wire side
BLK {_I
GR /NED I-I
BLKIEL { + }
(To page 11-72)
11-71

PGM-FI System
Knock Sensor (KS) tB18C1 enginel
ml- nl: The Malfunction Indicator Lamp (MlL) indicates Diagnostic Troubte Code (DTC) 23: A probtem inthe Knock Sensor (KS) circuit.
a6l--fzt.i--1/.---r+\
ware sido
o ooooo ooo ooo o looooooooo oooo ooo oo ooo I oooo oooo
11-74
- The MIL h6s boon r6port6don.- With th6 SCS ahort connec-tor connoctod (soe pago11-341, codo 23 is in-dicrtod.
Oo the ECM Reset Proceduro (seepage 11-35).
Start the engine. Hold the engineg!-3,Opq rpm with no load {A/T in
Lryl orlPlposirion, M/T in neurra until the radiator fan comes on,then let it idle.
Hold the engine at 3,0O0-4,000rpm for 10 seconds.Intomittor failure, ay5-t.m is OK at this tim6(teat drivo mav bonec€saary,.Chock tor Door connec-tion3 or loo3o wlaos etC222 {locatod 6r ghrshock tow6r), Cl33(KSl and ECM.Turn the ignition swirch OFF.
Connect the test harness to themain wire harness only, not to theECM (see page 1 1-37).
Check for continuity between D3terminal and body ground.
Ropdr short in RED/BLUwiro b€tweon ECM {D3land ths Ks.
(To page 11-75)