PGM-FI System
System Description
ENGINE CONTROL MODULE (ECM)OUTPUTS
*1: USA*2: 818C1 engine*3: A,/T*4: 818C1, 818C5 engines
PGM-FI Sy3tem
The PGM-Fl system on this model is a sequential multiport fuel injection system.
Fuel lniector Timing and Duration
The ECM contains memories for the basic discharge durations at various engine speeds and manifold pressures. The
basic discharge duration, after being read out from the memory. is further modified by signals sent from various sensors
to obtain the final discharge duration.
ldle Air Control
ldle Ai. Control Valve (lAC Valve)
When the engine is cold, the Ay'C compressor is on. the transmission is in gear (Ay'T only)the brake pedal is depressed, the
P/S load is high, or the alternator is charging, the ECM controls current to the IAC Valve to maintain correct idle speed.
lgnition Timing Control
. The ECM contains memories for basic ignition timing atvarious engine speeds and manifold pressures, lgnitiontiming
is also adjusted for engine coolant temperature.
. AKnockControl System isadoptedwhich sets the ideal ignition timing for the octane n um ber of gasoline used*r,
Other Control Functions
L Starting Control
When the engine is started, the ECM provides a rich mi{ure by increasing fuel injector duration.
2. Fuel PumD Control
. When the ignition switch is initially turned on, the ECM supplies ground to the PGM-FI main relay that supplies
current to the fuel pump for two seconds to pressurize the fuel system.
. When the engine is running, the ECM supplies ground to the PGM-FI main relay that supplies current to the fuel
DUmO.
. When the engine is not running and the ignition is on. the ECM cuts ground to the PGM-FI main relay which cuts
current to the fuel oumo.
INPUTS
TDc/CKP/CYP Sensor
CKF Sensor
MAP Sensor
ECT Sensor
IAT Sensor
TP Sensor
HO2S
VSS
BARO Sensor
ELD*1
Starter Signal
ALT FR Signal
Air Conditioning Signal
A,/T Gear Position Signal*3
Battery Voltage (lGN.1)
Brake Switch Signal
PSP Switch Signal*'
Knock Sensor*1
VTEC Pressure Switch*4
Fuel Tank Prssure Sensor
Fuel InjectorTiming and Duration
Electronic ldle Control
Other Control Functions
lgnition Timing Control
ECM Back-uD Functions
Fuel-lnjectors
PGM-Fl Main Relay (Fuel Pump)
MIL
IAC Valve
A,/C Compressor Clutch Relay
Radiator Fan Belay*1
Condenser Fan Relay
ALT*1
rcM
EVAP Purge Control Solenoid
Valve
H02S Heater
VTEC Solenoid Valve*'
IAB Control Solenoid Valve*,
EVAP Bypass Solenoid Valve
EVAP Control Canister Vent
Shut Valve
11-48
{b
Design Specifications
x1: At 6,000 engine rpm*2: At 7,600 engine rpm
0
(cont'd)
{
ITEMMETRICENGLISHNOTES
DIMENSIONSOverall Length 3-door4-doorOverall WidthOverall Height 3-door4-doorWheelbase 3-door4-doorTrack F/R
Ground Clearance
Seating Capacity
4,380 mm4,525 mm1,710 mm1,335 mm ]1,370 mm ]2,57O mm2,62O mm 11 ,415/1,470 mm I1,480/1,470 mm I1s0 mm I140 mm IFour (3-door),
172.4 in178.1 in67.3 in52.6 in53.9 in101.2 in103.1 in58.1/57.9 in58.3/57.9 in5.9 in5.5 tnFive (4-door)
Except Type RType RExcept Type RType R
weisht (usA)Gross Vehicle Weight Rating (GVWR)3.680 rbs
Weight (CANADA)Gross Vehicle Weight Rating (GVWR)1,670 kg
ENGINEType
Cylinder ArrangementBore and Stroke
Displacement
Compression Ratio
Valve Train
Lubrication SystemOil Pump Displacement
Water Pump Displacemenl
Fuel Required
8188l engine
818C1, Bl8C5 engines
81881 engine818C1, 818C5 engines81881 engine818C1, B18C5 engines81881 engine818C1 engine818C5 engineB1881 engine818C1, B18C5 engines
81881 engine818C1, B18CS enginesB1881 engine818C1, 818C5 enginesB1881 engine
818C1,818C5 engines
Water-cooled. 4-stroke DOHCgasoline engineWater-cooled, 4-stroke DOHCVTEC gasoline engineInline 4-cylinder, transverse81.0 x 89.0 mm | 3.19 x 3.50 in81.0 x 87.2 mm | 3.19 x 3.43 in1,834 cm3 (m/ ) | 112 cu-in1,797 cm3 (m/ ) | 110 cu-in9.210.010.6Belt driven, DOHC 4 valves per cylinderBelt driven, DOHC VTEC4 valves per cylinderForced and wet sump, trochoid pump50 f (53 US qt, 44 lmp qt)/minute*'71 ( (75 US qt,62 lmp qt)/minute*' :
140 I 1148 US qt. 123 lmp qtl/minute*1140 t (148 US qt, 123 lmp qt)/minute*2UNLEADED gasoline with 86 PumpOctane Number or higherPremium UNLEADED gasoline with91 Pump Octane Number or higher
STARTERTypeNormal OutputNominal VoltageHour RatingDirection of RotationWeight MffAIT
Gear reductionMfi:1.2 kW, A,/T: 1.4 kW12V ,
30 secondsClockwise as viewed from gear end3.5 ks | 7.7 lbs3.7 kg | 8.2 lbs
CLUTCHClutch Type
Clutch Facing Area
M/TAfiM/T 81881, 818C1 engines818C5 engine
Single plate dry, diaphragm springTorque converter203 cm2 , 31 sq-in176 cm2 | 27 sq-in
TRANSMISSIONTransmission Type
Primary Reduction
M/TAITSynchronized S-speed forward, 1 reverseElectronical ly control led4-speed automatic, 1 reverseDirect 1 : 1
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