1994 HONDA INTEGRA ignition

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;
o ooooooooo ooo I ooooo oooooooooooooo
oo Qoooooooooo I oooooo ooooooooooooo
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.
o oooooo oooooo I oo oooooooooooooooooooQoo ooo ooooo I oooo ooooooooooooooo
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

{From page I 1-5O)
Turn the ignition switch ON.
Measure voltage between o14(+ l terminal and A26 (- I termi-nal as soon as the ignition switchis turned on.
Msasuro voltage between D14(+) le.minal snd 426 l-) ter-
ls there O.1 V or less when theigniiion switch is first tu.nedon?
ls ther€ more than O.1 V?
Turn the ignition switch OFF.
Disconnect the "D" connoctorfrom the main wire h6rness.
Turn th€ ignition switch ON.
Measure volt6ge betwesn D14l+) terminal and A26 (-) ter-minal.
Measure voltage al th€ onginowire harnsss sid€ ol the HO2Sconngctor botween WHT/RED{+)and GRN/BLU (- ).
R.pri. rhort in WHT/RED wire betwo€n ECM(Dl41 rnd lho HO2S.ls there more than O.1 V?
Subdlht. . known{ood ECM.nd r..firck. ll rymptom/indic!-tion goaa !w!y, .aphca rha otigl-nll ECM.
ls thero moro than O.1 V?
Ch.ck for oDcn in WHT/RED wir.brrworn ECM (D141 .nd lh.HO2S. It wl]o l. OK, .oprir op€niD GRil/8LU rvlr. b.tw..n ECMlD22l lnd thc HO2S.
WHT/RED (+)GRI{/BLU (-I
wire side
DIGITAL MULIIMETERCommarcially avallablo o.KS-AHM-32-OO3HO2544 N.m (4.5 kgl.m, 33 lbf.ftl
1 1-51

PGM-FI System
Manifold Absolute Pressure (MAP) Sensor
fxai - lfil1 The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 3: An electrical
-:- -?- problem in the Manifold Absolute Pressure (MAPI Sensor circuit.
The MAP sbnsor converts manitold absolute pressure into electrical signals and inputs the ECM.
OUTPUTVOLTAGE
600 700
(in. Hsl GAUGEREADIIIO{mft Hg)
YEL/RED lBlSBl onginc)YEL^YHT lBlaCl .ngin.l | + I
{+l
SENSOR
1.5
- Tho MIL has boon roportod on.- Wirh tho SCS rhort connoctorconnectod lsoo pags 11-34),codo 3 b indicatsd.
Do the ECM Reset Procedure {soepage 11-35).
Intormittont tailuro, lystom ir Ol(at thls timo {tort drivo may bsnocessary).Chack to? Door connocllon oiloosa wiroa 6t C223 {locltod atright shock tow6rl, C'l 14 (MAP
sonaorl and ECM.
ls the MIL on and does it indi-cate code 3?
Turn the ignition switch OFF.
Disconnect the 3P connector tromthe MAP sensor,
Turn the ignition switch ON.
{To page 11-53)
11-52

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
ooooooooooooo I oooooooo l l5oiE€tdl ooooooo
o oooo oooooooo ! ooooooooooooooooooo
11-54
'.---.-'

PGM-FI System
TDC/CKP/CYP Sensor
_f'=l_ fi_l The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 4: A problem int:- the Crankshaft Position (CKP) Sensor circuir.
l'6]- ftl - The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 8: A problem in-i- the ToD Dead Center ITDC) Sensor circuit.
-flG]l- ft-] The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 9: A problem in- , - the Cvlinder Position ICYP) Sensor circuit.
The CKP Sensor determines timing tor fuel injection and ignition of each cylinder and also detects engine speed. TheTDC Sensor determines ignition timing at start-up (cranking) and when crank angle is abnormal. The CYP Sensor detects
the position of No. 1 cylinder tor sequential fudl injection to each cylinder.
- \.--r-l - -__l_-
tPJ:;LlJ:lEl--;l ?,:
- Tho MIL hos beon roponod on.- With rho SCS short connoctorconneclod lsso pago I l-341,code 4, 8 and/or 9 ar6 in-dicated.
Do the ECM Reset procedure (seepage 11-35).
Intohittent failuro, syst€m is OKat thia tima {t6st drivo may benoceaSaayr.Chock for poo. connections orlooss wires at C222 (located atright shock towerl, C110(TOC/CKP/CYP Sonsorl and ECM.
ls the MiL on and does it in-dicate code 4, 8 and/or 9?
Turn the ignition switch OFF.
Disconnect the 8P connector fromthe TDC/CKP/CYP sensor.
{To page 1 1-57)
11-56