1996 HONDA CIVIC Signal

ECM/PCM CONNECTOR D I16P)
Wire side ot female terminals
ECM/PCM CONNECTOR D l16P)NOTE: Standard battery voltage is 12 V
Te.minalnumb€r
Wirecolor
Terminaln!meDor.riptionSignal
RED/BLKTPS (THROTTLE POSITION
SENSOR}
Detects TP sensor signal.With throttle fully open: about 4.8 V
With throttle fully closedl about 0.5 V
REDA/VHTECT {ENGINE COOLANTTEMPERATURE SENSORDetects ECT sensor signalWith ignition switch ON{ll): about 0.1 - 4 8 v
(depending on engine coolant lempe ratu re)
3RED/G RNMAP {MANIFOLD ABSO'LUTE PRESSURE SENSOR}Detects MAP sensor signal.With ignition switch ON(ll): about 3 V
At idle: about 1.0 V
{depending on engine speed)
YEUREDVCCl (SENSOR VOLTAGE)Power source lor MAP sensor.With ignition switch ON (ll): about 5 v
With ignition switch OFF: 0 V
5GRNMHTBKSW {BRAKE SWITCHIDetects brake switch signalWith brake pedal released: 0 v
With brake pedal depressed: baftery voltage
6*?RED/BLUKS {KNOCK SENSOR}Detects KS signal.With engine knocking: Pulses
1
PHO2S (PRIMARY HEAT-ED OXYGEN SENSOR,SENSOR 1)
Detects Primary heated oxygen
sensor (sensor 1l signal
With throttle fullv opened from idle with
Iully warmod up engine: above 0.6 V
With throttle quickly closed: below 0.4 v
LABELDetects LABEL resistanceWith engine r!nning:about 0.3 - 4.9 V
8RED//ELIAT (INTAKE AIR TEM-PERATURE SENSOR)
Detects IAT sensor signal.With ignition switch ON (ll): about 0 1 -
4.8 V {depending on intake air temperature)
9*lWHT/BLKEGRL iEGR VALVE LIFT
SENSOR)
Detects EGR valve lift sensor signalAt idle without vacuum: about'1 2 V
With 27 kPa (2OO mmHg,8 in. Hg): about 4 3 V
10YEUBLUVCC2 (SENSOR VOLTAGE)Provides sensor voltage,With ignition switch ON(ll): about 5 V
With ignition switch OFF:0 V
11GRN/BLKSG2 (SENSOR GROUND}Sensor ground.Less than 1.0 V at alltimes
12G RN,4/1r'HTSG1 (SENSOR GROUND)Ground for MAP sensor.Less than 1.0 V at alltimes
GRN/BLK*1?SHO25G (SECONDARY
HEATED OXYGEN SEN'
SOR, SENSOR 2 GROUND)
Ground for secondary heated oxy-
gen sensor (sensor 2).
14WHT/REDSH02S (SECONDARY
HEATED OXYGEN SEN'soR, sENsoR 2)
Detects secondary heated oxygen
sensor (sensor 2) signal.With throftle fully opened lrom idle with
fully warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V
15|3. *15LT GRNPTANK {FUEL TANK PRES.
SURE SENSOR)
Detects fueltank prgssure sensor'With fuelfill caD opened: about 2.5 V
16*1GRN/RED
EL (ELD)Detects ELD signal.With parking lights turned on at idle: about
2.5 - 3.5 VWith low beam headlights turned on at
idle: about 1.5 - 2.5 V
*1: USA model*2r A/T (D16Y7, D16Y8 engine)*3: CVT (D16Y5 engane)*4: A,/T and Dl6Y7 engine*5: Except A/T and D16Y7 engine*6: A"/T (D16Y8 engine)i7: CVT (Dl6Y5 engine) and Dl6Y8 engine*8: .96 D16Y8 engine (coupei,'97 D16Y8 engine
models, sedanr KL model),'98 016Y5 engine,
engine, '99 - 00 D16Y5 (M/T) engine
*9: D16Y5 engine*10: M/T (D16Y5 engine)*11: Except M/T (Dl6Y5 engine)* 12r D16Y5. D16YB engine*13: D16Y8 engine*14: Dl6W engine*15: '97 D16Y7 engine (coupe: KL model, sedan: KL lLX) model),'98D16Y7 engine:(coupe: all'98 D16Y8
(cont'd)
1 1-91

Troubleshooting
Engine/P_o,wertrain Control Module Terminal Arrangement('99 - 00 Models except Dl6Y5 engine with M/Tl
ECM/PCM CONNECTOR A (32P)Wire side ot temale terminalsNOTE:Standard battery voltage is l2 V
ECM/PCM CONNECTOR A I32PI
Sign!l
3BLU2WSS (EVAP 8YPAsS SOLENOIDDrives EVAP bypass solenoid vatve,With gn'tion swnch ON (lll banery votlage
LT GRN/I/VIITVSV {EVAP CONTNOL CANISTERVENTSHUTVALVE]Drives EVAP controt ca n isrer v€nt shutWilh ignilion switch ON {tl): b€ttery vottage
8LU/GNNC8S (CRUISE CONTSOL SIGOown shift signal inpot lrom c.uise conrrolWhen crurss control is used:purses
68ED/YELPCS {EVAP PURGE CONTROLSOTENOIOVALVE)Drives EVAP purge conrrol sotenoid vatve.With engine running, engine cootant, betow r54.F (6a,C):
With engine.unning, €ngine coolant, abov€ 154.F(68'C): duty conlrolled
YELATPD {AT GEAR POSITIONSWITCH)ootects A/T gear posnion swilch s,gnar.In otherthan @ posilion: Apprcx. 5 V
8BLK,IflHTSO2SHTC (SECONDARY HEATED OXYGEN SENSOS HEATEFCONTFOL)
Drives sscondary h€ared oxygen senso.Wilh isn,rion swirch ON (ll):banery votraseWith lully warm6d dp€ngire runn'ng:dury controled
LT GRNATPNP (AT GEAF POSITIONSWITCH)oereds A/T 9€a r position switch signat.In Parr or neulrsl:0 VIn anyother position approx.5 v
t088NSCS (SERVICE CHECK SIGNAL)Oetects ssruice check connecror signal(the signalcausing a OTC indication)with rh€ t6rminal connected: 0 vWith the rerm ina I disconneded: abour 5 V of ban€ry
GNN/BIKD4IND (D4INDICATON]Drives Oa indicaio. lighr.With D4 indicator lightturned ON: O VWith D4 indicator lightturned OFF: battery vo ttageG8N/YETFTF (FUEL PUI\,4P SELAY)Orivos tuel pump relay,0V for two s€conds lfrer turnrng rgnilior swtcn ON(ll), then batt€ry voltage11BTI(REDACC (Al/C CTUTCH SELAY)Drives A./C clutch reray.With compressor ON:O VWilh comp.ssor OFF; battery vottage18GFN/OFNMI! (A,IAIFUNCTION INDICA.TOF LIGHT)With MlLturned ON:0 VWith l\,llL tornod OFF|batrery votrsge198tuNEP (ENGINE SPEED PUTSEIOulputs6ngine speed pulse,Wilh engin6.unning: putses
20GFNFANC {SADIATOR FAN CONTnoL)Orives radiarortan relay.Wirh r.distor t6n running:OVWith radiatortan stopped: banery vottage21ELUA/ELK LINESends and r€ceives s.an lool signal.With ignition switch ON (ll):p!ts€s
22'lBLUATP L {AT GEAS POSITIONswtTcH)Oelocis A"/T gear posirion switch siSnat.In othfflhan E position: Apprcx. 5 V
23SHO25 (SECONOARY HEATEDOXYCEN SENSOR, SENSOF 2)Detects secondsry hoar€d oxygen sensorWith lhronle f! lly or'6ned from idte with fu ywarmod up engine: above 0.6 vWiih th.onl6 quickb, closd:below 0,4 V24STS ISTAFTEN SWITCH SIGDebcrs staner switch signat.Wirh srarterswitch ON (tttJ: batteryvottogeWith sraftsr cwirch OFF:0 V26GFNPSPSW iPlS PNESSURESWITCII SIGNAL)Derecrs PSP switch signat.Atidle with steoring wheolin srraightahead position: O VAt idl6with steering wheetal fult lock: barery vo ttags27BLU/REOACS (AJC SWITCH SIGNALJOer*ts ,ay'C swirch signat.Wiih ty'C switch ON;0VWilh Ay'C switch OFF|aboor 5VWHT/REDSLU iINTERLOCK CONTROIUNIT)Drivos interloct control unit.With ignltion switch ON (ll)and brake pedaldepresed: batlory volrage29LT GRNPTANK (FUEL TANK PFESSUEESENSOR)Oer6ds lu€l tank pr€ssura sonsor signat.Wilh ig.rrrd swirch ON rttr and fuetti

cap ooen6d.
30GRN/FEOEr (ELOIWith parking lighlsrurned on ar idteiaboui 2.5- 3.S VWirh low beam he€dlig hts turnqd on ai idts: aboul 1.52.5 V32GRN/'WHTAKSW (BFAKE SWITCH)Detets brak€ swrtch signEt,With brake pedal r6l€ased:0 VWhh brake pedaldepres*d: battery voltEse'1:A./T (D16Y7, D16Y8 engine)*2: rvt/T13: CVT (D16Y5 engine)
11-92

Troubleshooting
Eng ine/P_owertrain Control Module Term inal Arrangement
('99 - 00 Models except Dl6Y5 engine with M/Tl (cont,d)
ECM/PCM CONNECTOR C {31P)Wire side of female terminalsNOTE;Standard
*1;4"/T lD16Y7, D16Y8 ensinel
43: CVI(016Y5 engine)'4: D16Y5, D16Y8, 81642 engin€
ECM/FCM CONNECTOR C 13lPI
is 12 V.
Sig.al
lBLK4/VHTPO2SHTC (PNIMARY HEATEOOXYGEN SENSOB HEATES CONTROL)
Drivss primary hoated orygen sensofWith ignition switch ON (lr)rbanery volageWrh fJly warned up €ngir. ru..i19: duty.oaro ed
2WHT/GFNALTC (ALTESNATOB CONTSOL)Sends aliernalo. control sig nal,With fullywa.med upengine ronning; banery vohaseDuring d.iving with smallelect.icatioad; O V38ED/BLUK5 (KNOCK SENSOR)with sngine knocking: pulses
5WHT/REDATTF {AITEFNATOR FR SIGNAL'Detects slternaror FR si9n.l.With tullywarmed up engine running:O V- batteryvortage(dependingon erectficat toad)
WHT/8LKEGRL (EGN VAIVE LIFTSENSOR)Dete.ts EGR valve lrft sensorsignat.
GRN,4r'l/flTSGl ISENSOE GBOUND)Groond fo. MAP s€nsor.L€ss rhan 1.0 v at alltimes88luCKPP (CKP SENSOR P SIOE'With engine running: pulses9CKPM {CKP SENSOR M SIDEIGround for CKP sensor.
BLU/BLKwlvl (wEc PREssuSE swtTcllSIGNAI)D€tocts VTEC pfessure switch signat,With €ngine at low enginospeed:0VWith engin€ at high engino speed : banery vo ttaae
16PHO25 (PRII\,1AFY HEATEDOXYGEN SENSOR, SENSOR 1)Oetects primary heated oxygen s6nsor lsen-With lhrottle f!l1y open€d from idtewith tuly,wa.med !p engin€: Ebove 0.6 VWilh thronl€ quickly closed: b€tow 0.4 V
FED/GRNMAP (I\,4ANIFOLD ASSOLUIEPFESSUSE SENSOB}Dotocrs i,4AP sensor signsl.With ignitioh switch ON (ll):about 3 VAt idlei6boul 1.0 V (depending on engine speed)18GBN/8LKSG2 (SENSOR GSOUND)Less than 1.0 V aralttimes'19YEUNEDVCCl (SENSOR VOLTAGEIPowersourcero MAPsenso..With ignition swilch ON {ll):about 5 VWirh iqnition switch OFF]0 V20GNNIDCP (TDC SENSOB P SIDEIWith ongine running: pulses218EDTDCI\,I (TDC SENSOR M SIOE)Ground lor TOC aensor.22BTU/NEDCKFP (CKF SENSOR P SIDE)With engine running: p!lses
23VSS {VEHIClE SPEED SENSOR)Wilh ignrt|on swich ON rllr snd lront wl-ee' rotating.cycles 0 V about 5V or baneryvottage
25BED/YELIAT ONTAKE AIF TEi,4PEBA.TUEE SENSOR)Detects IAT senso. signat.With ignition switch ON (ll): about 0.1 4.8 Vldepending on i.take air ternpe.atu re)
268ED,ryVHTECT (ENGINE COOLANTTEI\,I.PESATUBE SENSOR)Oelects ECT sensor signal.With ignirion swirch ON {ll):about0.1 -4.8 V(depending on engine coolant temperatu re)
21NED/BLKTPS (THROTTLE POSITION SEN,SOF)Detects TP sensor signal.Wilh th.onle fully op€n: about 4.a VWith rhronle f!lly closed: about 0.5 V
2aYEVBLUVCC2 (SENSOR VOLTAGE)Provides s6nsor voltag€.With ignirion swirch ON (tt):about 5VWith ignilion swiich OFF:0 V29YELCYPP (CYP SENSOR P SIDE)Wilh €ngrne running: pruses3oBLKCYPM (CYP SENSOR M SIDE]G,ound for CYP sonsor.J1WHT/FEDCKFM (CKF SENSOB M SIDE)Ground fo. CKF sonsorsign6i.
11-94

ECM/PCM CONNECTOR O {16P)
Wire side ol temale terminalsECM/PCM CONNECTOR D {16P)
(D16Y7, D16Y8 enginelNOTE: Standard battery voltage is 12 V.
L
.1 A/J (Dl6Y7, Dr6Y8 engine)
(cont'd)
1 1-95
5i!ml
YELLCA (LOCK.UPCON]ROLSOLENOID VALVE A)Orivos look-up controlsol€noid wlv€ a.With lock-up ON: httery vollageWith lock-up OFFi 0 V
GRN,M/HT
SHB {SHIFT CONTFOLSOLENOIO VALVE B)Drivos sh ift cont.ol solanoid valv6 Bln E posnion, in 1st lnd 2nd eoat ,n E E pos'tion:Battsry voltagoInElposirion. in 3rd seat in pd, El in.th sear in
l_d polition: o v
3''GRN/BLKLC8 (IOCK UP CONTBOLSOLENOID VALVE B)Drivs locl up conttol sol€noid v6lv€ Bwhen fulllock-up: Banory vollagaWnh naf locl-uP: Pulsing si9n6l
5',BLK/YELVSSOI (BATTEsYVOLTAGEFOB SOLENOID VALVE)Powe. sourc€ ol solGnoid valvewirh ignirion sitch ON (ll): battory voltaoeWirh ignnion switch OFF:0 v
ATPR (AT GEAR POSITIONswrTcH)Detecrs Ay'T g6a. position switch signal.In any olh€r position: APProx. 10 V
8LU/YEL
SHA iSHIFI CONTROLSOLENOIDVALVE A)Oriv€6 sh ift conirol sol€noid valve A.ln tr,tr position, in 2nd €nd 3rd sear in lpd, &lposirion: Batt€ry vollsgo;n 1d soar in E, E position, in.ih se6r in E
PNKATPO3 (AT GEAR POSITIONSWITCH)Oot6cts Ay'T S6.r poeirioo switch siSnalIn Enyoth.r position: APPror, t0 v
9''YELATPD4 {AT GEAE POSITIONswrTcH)Oorocts A/I gs8r position switch signal.In any oth6t position:APProx 5 V
BIUNC (COUNTE RSHAFT SPEEDSENSOB)DetocB counr€.shaft sp66d $osr sig.alsD€p€nding on v6hicls 8pe€d;Pul.ins signalWh6n v€hicls i5 ltoPPsd:0 v
REONM (MAINSHAFTSPEED SEN.soR)O€l€cts mainshalt sp€€d 3.nsor 3ign.lsWi$ engino rLrnningl PUls6s
NMSG {MAINSHAFT SPEEOSENSOR GFOUNO)Groundfo, mainshaft sp@d sensor.
13''!T GFNATPNP {AT GEAF POSITIONswrrcH)oetscts A/T 96ar pGitaon swhch signalIn par* or n6ulral:0 VIn sny olhd po3ition: APProx l0V
BLUATPz {AT GEAE POSITIONswrTcHlDor€cis !y'T gos. posilion swilch signal.In any oth6r Position: APProx, 10 V
16''GANNCSG {COUNTEBSHAFT SPEEDSENSOE GROUND)Ground lor countershaii sp€3d s6nsor.
r lo

Troubleshooting
En gine/P_oweft ra in Control Module Termina I Arran gement
('99 - 00 Models except Dl6YS engine with M/Tl (cont,dl
ECM/PCM Connectol D (16P1
Wire side of female terminats
ECM/PCM CONNECTOR D {16P) (Dl6YS engine: CVTI
*3: CVT (Dl6Y5 engine)
NOTE: Standard battery voltage is 12 V
ECM/PCM CONNECTON D (r6P)
f€rminal
numDeaWire colorTerminalnameDescriptionSignal
1+3WHT/REDVEL (SECONDARY GEARSHAFT SPEED SENSOR)
Secondary gear shaft speedsensor,Depending on vehicle speed: pulsesWhen vehicle is stopped:0 V
2*3GRN/BLK
INHSOL {INHIBITORSOLENOID CONTROL)Inhibitor solenoid control.With inhibitor solenoid ON: bafteryvoltageWith inhibitor solenoid OFF: 0 V
3+3GRN/YEL
SHLSM (SHIFT CONTROLLINEAR SOLENOID
NEGATIVE SIDE)
Ground for shift control linearsolenoid.
BLU^/vHTSHLSP (SHIFT CONTROLLINEAR SOLENOIDPOSITIVE SIDE}
Drives shift control linearsolenoid power.With ignition switch ON (tl): pulses
5*3BLK,/YE LVBSOL lBATTERYVOLTAGE FOR
SOLENOID VALVE)
Power source of solenoid valve.With ignition switch ON (ll): baneryvoltage
With ignition switch OFF: 0 V
6*3WHTATPR (AT GEAR
POSITION SWITCH)Detects A,/T gear position switchsrgnal.InRposition:0V
In any other position: Approx. 10 V
BLKA/VHIVELSG (SECONDARY
GEAR SHAFT SPEEDSENSOR GROUND)
Ground for secondary gear shaftspeed sensor.
10*.WHTNDN (DRIVEN PULLEY
SPEED SENSOR)
Detects driven pulley speedsensor srgnal.In other than Park or neutral: pulses
11*3RED/BLUNDR (DRIVE PULLEY
SPEED SENSOR)
Detects drive pulley speedsensor srgnal.In other than Park or neutralt pulses
12*3GRNNDRSG (DRIVE PULLEYSPEED SENSORGROUND)
Ground for drive pulley speedsensor.
13*3LT GRN/REDATPS (AT GEARPOSITION SWITCH)
Detects Ay'T gear position switchsrgnal.In S position:0 VIn any other positioni Approx, 10 V
14*3GRN/BLKDIND 1D INDICATOR
LIGHT)
Drives D indicator.With D indicator turned ON: 5 VWith D indicator turned OFF: O V
16*rRED^/VHTNDNSG (DRIVEN
PULLEY SPEEDSENSOR GROUND)
Ground for driven pulley speedsensor.
1 1-96

DTC(MlL indicationlDetection ltemProbable CausePage
P1336(54iCrankshaft SpeedFluctuation SensorIntermittent Interruption
. CKF sensor11 183
P1337 (54)Crankshaft SpeedFluctuation SensorNo Signal
CKF sensorCKF sensor circuitECM,PCM
11-'183
P13s9 (8)Crankshaft Position/TopDead Center SensorDisconnected
' CKP/TDC sensor circuit11-187
P1361 (8)Top Dead CenterSensor IntermittentInterruptron
. tuL sensor
11-172
P1362 (8)Top Dead CenterSensor No SignalTDC sensorTDC sensor circuitECIV/PCM
11-172
P1381 {9)Cylinder Position SensorIntermittent Interruption
. CYP sensor11-172
P1382 (9)Cylinder Position SensorNo SignalCYP sensorCYP sensor circuitECM/PCM
11-112
P1456*5(90)
Evaporative Emission ControlSystem Leak Detected {FuelTankArea)
FuelfillcapVacuum connectionFu€ltankFuel tank pressure sensorEVAP bypass solenoid valveEVAP two way valveEVAP control canister vent shut valveEVAP control canisterEVAP purge control solenoid valve
11-283
P1457*6 (90)
Evaporative Emission ControlSystem Leak Detected (EVAP
Control Canister Area)
Vacuum connectionEVAP control canisterFuel tank pressure sensorEVAP bypass solenoid valveEVAP two way valveEVAP control canister vent shut valveFuel TankEVAP purge control solenoid valve
11-283
L
*6: '96 D16Y8 engine (coupe),'97 Dl6Y7 engine (coupe: KL model, sedan: KL (LXl model),'97 D16Y8 engine (coupe: all models,
sedan: KL model),'98-all models,'99-all models,'00-all models.
(cont'd)
1 1-1 01
I ta

Troubleshooting
Diagnostic Trouble Code (DTCI Ghart (cont'd)
DTClMlL indicationlDetegtion homProbablo CsussPage
P1491*! \12J
EGR ValveLift InsufficientDetected
EGR valve (with lift sensor)EGR valve lift sensor circuitEGR control solenoid valve (A,/I)
EGR control solenoid valve circuitEGR lineEGR valve circuit (M/T)
ECM
't1-256
P1498*. 112)
EGR ValveLift SensorHigh Voltage
EGR valve (with lift sensor)EGR valve lift sensor circuitECM11-265
Pl508*10 (14)
ldle Air Control ValveCircuit FailureIAC valveIAC valve circuitECM
'11-194
{14)
ldle Air Control ValveCircuit FailureOpen or short in IAC valve circuitIAC valveECM/PCM1l-198
P1607 1-)
Engine ControlModule/Powertrain Control lvlodulelnternalCircuit Failure A
. ECM/PCM
11-188
P1655*1 (30)TMA,/TMB Signal Line FailureODen or sho.t in TMA,/TMB circuit11-189
P1705P1706P 1753P1758P1768P1785P1790P1791P1793 (70)*
P1870P1873P1879P1885P1886P1888P1890P1891
Automatic Transaxle
Section 14
*: The E indicator light and the Malfunction Indicator Lamp {MlL) may come on simultaneously.*4: D16Y5 engine (M/T)+10: Except A/T and Dl6Y7 engine*11: A,/T and D16Y7 engine*18: D16Y5 engine (CW) (except '99 - 00 models)
11-102

PGM-FI System
System Description
CKP/TDC/CYP Sensor
MAP Sensor
IAT SensorTP SensorEGR Valve Lift Sensor*'Primary H02SSecondary HO2SVSSBARO SensorELD*'KS€Starter SignalALT FR SignalAir Conditioning SignalA/T Gear Position SignalBattery Voltage {lGN.1}Erake Switch SignalPSP Switch SignalFuel Tank Pressure Sensor*iVTEC Pressure Switch*5Clutch Switch Signal*6Countershaft Speed SensornBMainshaft Speed Sensorrs
-\
----t /
F;ilrr j"-----fi-tri-'r.;l
Fb"t."'i" d" c;;il
F,h"'c;;tr*".io";-l
@."r.l"sc;;ll
EaM/PcM B""k-p F"""till
r\
-:/
Fuel IniectorsPGM-Fl Main Belay {Fuel Pump)MILIAC Valve!y'C Compressor Clutch RelayRadiator Fan Relay*,Condenser Fan RelayALT*'lcMEVAP Purge Control Solenoid
Primary HO2S HeaterSecondary H02S HeaterEGR Control Solenoid Valve*rEGR valve*6EVAP Bypass Solenoid Valve*'EVAP Control Canister Vent Shut
VTEC Solenoid Valve*5DLCLock-up Control Solenoid Valve*aShift Control Solenoid Valve*3Linear Solenoid Valve*3
*1: Dl6Y5 engine*2: USA model*3: CW (D16Y5 ensine), D16Y8 engine and 81642 ensine*4: '96 D16Y8 engine lcoupe),'97 Dl6Y7 engine (coupe: KL model, sedan: KL (LX) model),'97 D16Y8 engine {coupe: all models, sedan: KLmodel),'98-all models,'99'all models,'00-all models+5: D16Y5, D16Y8,816A2 engine*6: M/T (D16Y5 enginei*7: CVT 1D'l6Y5 engine)+8: A/T (D16Y7, D16Y8 engine)*9: '96 D16Y5 engine,'96 D16Y7 engine,'96 Dl6Y8 engine (sedan),'97 D16Y5 engine,'97 Dl6Y7 engine (coupe: KA, KC models, sedan:KA, KC, KL (LX) models, hatchback: all models),'97 D16Y8 engine (sedan: KA, KC modelsi
PGM-FI Sy3lem
The PGM-Fl system on this model is a sequential multipon fuel injection system.
Fuel iniector Timing and Duration
The ECM/PCM contains memories for the basic discharge durations at various engine speeds and manifold air flow rates.
The basic discharge duration, after being read out from the memory. is further modified by signals sent from various sen-
sors to obtain the final discharge duration.
ldle Air Control
ldle Air Control Valve llAC Valve)
When the engine is cold. the A,/C compressor is on, the transmission is in gear, the brake pedal is depressed, the P/S load
is high, or the alternator is charging, the ECM/PCM controls current to the IAC Valve to maintain the correct idle speed.
lgnition Timing Control
. The ECM/PCM contains memories for basic ignition timing at various engine speeds and manifold air flow rates.
lgnition timing is also adjusted for engine coolant temperature.
. Aknockcontrol system was adopted which sets the ideal ignition timing for the octane rating ofthegasoline used.*3
Othgr Control Funqtions
1. Starting Control
When the engine is started, the ECM/PCM provides a rich mixture by increasing fuel injector duration.
2. Fuel Pump Control
. When the ignition switch is initially turned on, the ECM/PCM supplies ground to the PGM-Fl main relay that sup-plies current to the fuel pump for two seconds to pressurize the fuel system.. When the engine is running, the ECI\4PCM supplies ground to the PGM-FI majn relay that supplies current to the fuel
oumo.
. When the engine is not running and the ignition is on, the ECM/PCM cuts ground to the PGM-FI main relay which
cuts current to the fuel pump.
11-104
INPUTS
ENGINE CONTROL MODULE (ECMY
POWERTRAIN CONTROL MODULE (PCM) OUTPUTS