1994 HONDA INTEGRA fuel

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aALUfYELYEL'
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fitr G-Fil------lo ln/Hr/68n Ilo lciN,r/vHr Il-IcRY------l
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lO lGRt/8LU ITitfgruffir-----lktlBrKr--I o lYcL/Gnir Ilao laLx./YEL II "] IYEUBL( Iktlterwirr ---
c431(wlthout
crui!acontrol)
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l6'TwHr/cnN ----'l
1ol cRN^vHr ----l
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l3l8rK II t lBLx,REo It5 |I 6 GRN/BLX If?-TFEpcFN --
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NOTE: a Ditterent wires with the same color have been given a number suttix to distinguish them (fot example
YEL/BLKr and YEL/BLK, are not the samel.
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side- Connector of female terminals: View from wire side(cont'd)
11-25
12313
5BLU/YEL6
a1a
20
YEL/BLK'2Ht/aluiEO/YIL15516't7
aBL&"/EL20YEL

123467
Ir0l1 11121131 114115116
gL&YELBLK/YEL212BLKGFN,YELYEL515
I
6
GFNLT GRII/SL(9GRN/BLII5
REO/6LU28RN/8LK3BLU12BLUf/€LYEL/RED136YEL16BLUYEL/6LKt6
a DiJterent wires with the same color have been given a number sutfix to distinguish them (for example
YEL/BLK1 and YEL/BLK' are not the same).
O: Related to Fuel and Emissions System.
a - Connector ot male terminals: View from terminal side- Connector of female terminals: View from wire side
{cont'd)
11-27

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c406
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I6TBRN/B,L( -----l
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l6TLr BN--- l_l
c408 {ECM-Bl
suffix to distinguish them (for examplea Different wires with the same color have been given a number
YEL/BLK1 and YEL/BLK, are not the same).
O: Related to Fuel and Emissions System.
a - Connector of male terminals: View from terminal side
Connector of female terminals: View from wire side
c410 tEGM-Al
tt4YEL'| (jtALK/AED
SLU1aALKt(9YEL| 0o)
ALK'ALK'YEL/BLKGRN/oRr l@BLK
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IALU/REO6
ALU/YEL
BLK2YEL
56
11-29

System Description
System Connectors [Fuel Pumpl
REAR WIREHAFNESS
11-30

c510
NOTE: a Ditferent wiros with tho samo color hava been given a numb€r sutfix to distinguish them {for example
YEL/BLKI and YEL/BLK, are not th€ same).
O: R€lated to Fuel and Emissions Systom.
a - Connoctor ol malo tarminals: Vi6w from terminal side- Connector ol f6msl€ tarminals: Vi€w from wire sid€
11-31

PGM-FIIOLE CONTROLFUEL SUPPLY
INTAKEAIR€MtsstoNCONTROLSELECTRICALLOAODETECTOR
VARIAEIE VALVETIMINC & VALVELIFT ELECTRONICcoNTRO|-SOLENOID
VARIABLE VALVETIMING & VATVEI-IFT ILECTRONICcottTR0tPffESSURE
KNOCKstNsoRFISIGNALFISIGNAT
IOLE AIRc0NTR0r-OTHERIOLECONTROLS
FUELINJECTOR
OTHERFUELSUPPTY
| 1"70s3811.74r 1-76t 1-7611-8211-78| 1-102r 1-97t 1-1 15ll129
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11-3

Troubleshooting
Self-diagnostic Procedures (cont'dl
':818C1 engine
a lf codes other than those listed above are indicated, verifv the code. lf the code indicated is not listed above, replace
rhe ECM.
a The MIL may come on, indicating a system problem when, in fact, there is a poor or intermittent electricalconnection.
First, check the electrical connections, clean or repair connections it necessary.
o The MIL and @ indicator light may light simultaneously when the Diagnostic Trouble Code (DTC) 6, 7 or 17. Check
the PGM-Fl system according to the PGM-Fl system troubleshooting, then recheck the l!! indicator light. ll it lights,
see page 14-5O, 51.
a The MIL does not come on when there is a malfunction in the A/T Fl signal or Electrical Load Detector (ELDI circuits.
However, it will indicate the codes when the Service Check Connector is shorted.
DIAGNOSTIC
TROUBLE
CODE (DTCISYSTEM INDICATEDPsge
oENGINE CONTROL MODULE IECM)11-42
,lHEATED OXYGEN SENSOR IHO25)1 1-46
aMANIFOLD ABSOLUTE PRESSURE {MAP SENSOR)11-52
4CRANKSHAFT POSITION (CKP SENSOR)1 1-56
oENGINE COOLANT TEMPERATURE (ECT SENSOR)11-58
THROTTLE POSITION (TP SENSOR}11-60
ITOP DEAD CENTER POSITION (TDC SENSORI1 1-56
9No. 1 CYLINDER POSITION (CYP SENSOR)1 1-56
10INTAKE AIR TEMPERATURE (IAT SENSOR)11-62
13BAROMETRIC PRESSURE (BARO SENSOR}1|-64
14IDLE AIR CONTROL (IAC VALVE}11-42
tcIGNITION OUTPUT SIGNAL11-66
toFUEL INJECTOR1't-102
17VEHICLE SPEED SENSOR {VSSI11-68
20ELECTRICAT LOAD DETECTOR (ELD)'t 1-70
21VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL SOLENOID
VALVE {VTEC SOLENOID VALVE)'6-36
22VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL PRESSURE
SWITCH (VTEC PRESSURE SWITCHI-6-38
23KNOCK SENSOR {KS}-11-7 4
30A/T FI SIGNAL A11-76
3'rA/T FI SIGNAL B1 1-76
4'lHEATED OXYGEN SENSOR (HO25} HEATER11-47
43FUEL SUPPLY SYSTEM1 1-50
11-36

PGM-FI System
System Description
ENGINE CONTROL MODULE (ECMIOUTPUTS
PGM-Fl System
The PGM-Fl system on this model is a sequential multipon fuel injection system,
Fuol Iniector Timing and Duration
The ECM contains memories tor the basic discharge durations at various engine speeds and manifold pressures. Thebasic discharge duration, after being read out from the memory, is turther modilied by signals sent from vanous sensofsto obtain the final discharge duration.
ldle Air Control
ldle Air Control Valve (lAC Vatve)
When the engine is cold, the A/C compressor is on, the transmission is in gear (A/T only) the brake pedal is depressed,the P/S load is high, or the alternalor is charging, the ECM controls current to the IAC Valve to maintain correct idle soeed.
lgnition Timing Controla The ECM contains mamories for basic ignition timing at various engine speeds and manifold pressures. lgnition timingis also adjusted for engine coolant temperature.a A Knock Control System is also used. when detonation is detected by the knock sensof. the ignition timing is retarded(B18Cl engine).
Other Control Functions
1. Starting Control
When the engine is started. the ECM provides a rich mixture by increasing fuel injector duration.2. Fuel Pump Control
a When the ignition switch is initially turned on, the ECM supplies ground to the PGM-Fl main relay that suppliescurrent to the fuel pump tor two seconds to pressurize the tuel system.a When the engine is running, the ECM supplies gfound to the PGM-Fl main relay that supplies current to the fuel pump.a When the engine is not running and the ignition is on, the ECM cuts ground to the PGM-FI main relav which cutscurrent to the fuel pump.
TDC/CKP/CYP Sensor
MAP Senso.
ECT Sensor
IAT Sensor
TP Sensor
HO2S
vss
BARO Sensor
ELD
Starter Signal
ALT FR Signal
Air Conditioning Signal
A/T Gear Position Signal
Battery Voltage {lcN. 1)
Brake Switch Signal
PSP Switch Signal
Knock Sensor'
VTEC Pressure Switchr
Fuel-lnjectors
PGM-FI Main Relay (Fuel Pump)
MIL
IAC Valve
A/C Compressor Clutch Relay
Radiator Fan Relav
Condenser Fan Relav
ALT
rcM
EVAP Purge Control Solenoid
HO2S Heater
VTEC Solenoid Valve'
IAB Control Solenoid Valve*
lFuet tnjector Timing and Duration]
I Electr..l"ldle Contr;il
Fit'e' contr; Funcrfit
l6tio; Ttntrlg c..trol
tEcM aack-,rp Functiorlsl
': 818C 1 €ngine
11-40