1994 HONDA INTEGRA harness

YES
PGM-FI
Heated
11-471
System
Oxygen Sensor Heater (cont'd)
YEL/BLK I+I ORI{/BLK (-I
wire side
HO2S44 N.m{4.5 kgt.m, 33 lbf.ft}
Check for continuity to bodyground on terminals 3 and 4of theHO2S.
Check for continuity between terminal4 and terminals 1 and 2 in-dividually.
Turn the ignition switch ON.
At the HO2S harness. measurevoltage between YEL/BLK 1f lteFminal and ORN/BLK l-) ter-mrnal.
Turn the ignition switch OFF.
Disconnect the "A" connectorfrom the ECM.Measure voltage between YEL/BLK l+) terminal and bodyground.
Turn the ignition switch ON.
At HO25 harness, measure vol-tage between YEL/8LK (+) termi-nal and ORN/BLK {-) terminal.
RoDair short in ORN/BLK wir6 b6tw6on ECM(A6l and HO2S.ls there baftery voltage?
Ropai. opon in YEL/BLKwire botwoan HO2S.nd PGM-FI main relav.
Turn the ignition switch OFF.Turn the ignition switch OFF.
11-48
{To page 11-49){To page 11-49}

* Monitor over a 5 minute Deriod unl6ssthe current drops below O.1A im-mediatelv.
BATTERYVOLTAGE?
L-E;
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Connect the test harness "A"
connector to the main wire harness only, not the ECM (see page
1 1-371.
Connect an ammetet between ter-minals A6 {+ ) and 426 (- )
Turn the ignition switch ON.
ls the current less than0.1 A?.
Subrtitulo s known-good ECM.nd r.ch6ck. lf symptom/indica-tion goes away. roplaco tho origi-n.l ECM.
Connoct the test harn€ss "A"
connector to the main wire har-n6ss only. not th€ €CM {seo page't't-37).
Turn the ignition switch ON.
Measwe vohage bstween A6 {+ }tg.minal and A23 {-)terminal.
Ropsii op6n in ORN/BLK wiro bo-tw..n ECM {A6l and tho HO2S.
Subrtiluto s known{ood ECMlnd Echock. ll .ympiom/indic{-tirn god !way, '.pLc! f|e origl-h.l ECM.
11-49

PGM-FI System
rj-t
--t-.
Fuel Supply System
-+-lt@t- -t 13 |- ' "- - --i--
T,-n The Maltunction Indicator Lamp (MlL) indicares Diagnostic Trouble Code (DTC) 43: A problem in
- L:!-i - the Heated Oxygen Sensor (HO2S) circuit. or a probtem in the Fuel Supply System.
NOTE:. Use DIGITAL MULTIMETER.. U6e 2 Volt rang6.
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426
JUMPER WIRE
o ooooo oooo ooo I oo oooooo Isdtcllodsl ooo ooooooooo oooo ooo oo ooo I oooo ooooooooooooooo
D14 {+l
I
426 t-l vohrgo rhould rl.n.t
| 0.4-0.5 V wh.n th..- ignirioo .wilch i! firdt|rtrod o.r, Itd docr!6ato b.low O.1 V in L..th6n two minutaa.
- Tho MIL h.s boen reportod on.- With rhe SCS short con-noctor connocted (soo paga1l-34), codo 43 b indlcat.d,
From codr I troebl.-lhoorlng lprgo 1146).
ls the code 43 accompanied bythe MIL and poor driveability?Go to Fuol Supply .y.t.m (|ecpag6 1t-971.
Do the ECM Reset ftocedure lseepage 11-35).
Connect the SCS short connectorto the service check connector{see page 'l1-34).
Start the engine. Hold the engineat 3,00O rDm with no load {A/T in
@or@ position, M/T in neutral)until the radiator Ian comes on,then let it idle for at least onemanute,
Intonnitl.nt t llure, tydom lr OKat thi. tim. lto.t drlv. mly b.nocaararyr.Chock lor poo? connactlona otloots wiro at C223 lloc.t.d atrlghl lhock towo.]. Cl13lHO2Sland ECM,
Raise the engine speed to 3,000rpm and hold that throttle positiontor at least one minute.Do not vary the throttle positioneven if the rpm drops.
Ooes the MIL blink and does itindicate code 43?
Turn the ignition swilch OFF.
Connect the test harness betweenthe ECM and conneclors {seepage 1 1-371.
With the ignition switch OFF, waitfor at least two minutes.
lnstall a jumper wire on the testharness between A6 and A26.
11-50
1To page 1 1-5'l l

Measure voltage between YEL/WHT {818C1 engine), YEL/RED(B188'1 engine) {+ ) terminal andbodv ground.
Measure voltage between YEL/WHT (818C1 engine), YEL/RED{B1881 engine) (+ } terminal andGRN/WHT (- ) terminal.
ls there approx. 5 V?
Repair opon in GRN/WHT wir6 botweonECM lD2l l and thoMAP sonsor,
Turn the ionition switch OFF.
ls there approi. 5 V?
Connect the test harness "D"
connector to the ECM only, nottothe main wire harness {see page11,37).
Turn the ignition switch ON.
Measure voltage betweon wHT/YEL (+ ) terminal and GRN/WHT{- } terminal.Measure voltage between D19{+} terminal and D21 {-}termrnat,
ls there approx. 5 V?
Bepair open in YEL/WHT wi.e be-tw€6n ECM lD19) and tho MAPaon30t.
ls there approx. 5 V?
Substitule s known-good ECMand rechock. ll symptom/indica'tion goes away, replac€ tho oiigi'nal ECM.Turn the ignition switch OFF.
Reconnecl the 3P connector tothe MAP sensor.
Connect the test harness betweenthe ECM and connector (see page1 1-371.
Turn the ignition switch ON.
11,52)
{To page 11-54}lTo page I l-54)
(cont'd)

PGM-FI System
Manifold Absolute Pressure
lFrom page 11-53)
{MAPI Sensor (cont'd)
(From paqe 1 1-53)
NO
M6asure voltage between D17{+) terminal and 021 (-}terminal.
ls there approx. 3 V?
Substituto 6 known{ood ECM.nd rach.ck. It symptom/indica-tion gooa away, Eplaco tho orlgi-nrl €CM.
Turn the ignition switch OFF.
Connect the test harness "D"
connector to the ECM only. not tothe main wire harness lsee page11-37).
Turn the ignition switch ON.
Measure voltage botwson Dl7(+) terminal and D21 {-}terminal.
R.p.lr opon or ahort in WHT|rELwi?o botw.on ECM {O17) and thoMAP senso..ls there approx. 5 V?
Substitute a known{ood ECMand rochsck. It prdcribed voltrgob now availablo, rophce trie origi-nal ECM.
approx. 3 v?
-D17 til D21 (-l
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11-54
'.---.-'

{From page 11-56)
Measure resistance between ter-minals of the indicated sensor.'see table
R.olac6 th. distributorhousing (8oo aoction231.ls there 35O-7O0 0?
Check for continuity to bodyground on both terminals ot theindicated sensor,
Rgplace tho di.tributorhousing llo€ loction23t.
Connect the test harness to themain wire harness only, notto theECM (see page 1 1-371.
Measure resistance between ter-minals of the indicated sensor ontest harness.'see table
Roprir opon in tho indi-cated senaoa wirea.*soo tablols there 350 70O 0?
Repair short to bodyground in tho indicrl.dt€naor wiroa.i s€e tabla
SEIiSOFDTCSENSORECMTENMINAICOLOR
2815ATU/GFN
6816BTUTVEI
TDCa813ORN/BTU
814
9B1tORN
as12
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812350-7000?
Check for continuity to bodyground on 815. 813 and/or B'l 1terminals.
ls there continuity?
NO
Substituto a known-good ECMand rechock. lf symptom/indica-tion goes away. roplaco tho origi-n.l ECM.
11-57

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

(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