NF
NEW FEATURES Ð 5S-FNE ENGINE19
ENGINE CONTROL SYSTEM
1. General
An engine control system based on the 5S-FE engine has been adopted. The knock sensor has been discontin-
ued because natural gas has a high octane value and is less susceptible to knocking.
The engine control system of 5S-FNE and 5S-FE engines are compared below.
System
Outline5S-FNE5S-FE
SFI
Sequential
A D-type SFI system is used, which indirectly detects
intake air volume by manifold absolute pressure sensor.
Sequential
Multiport Fuel
Injection
The fuel injection system is a sequential multiport fuel
injection system.
Ignition timing is determined by the ECM based on sig-
nals from various sensors.
ESA
Electronic Spark
AdvanceThe ECM corrects the ignition timing in response to en-
gine knocking in accordance with the signals received
from the knock sensor.
Ð
Advance
Torque control correction during gear shifting had been
used to minimize the shift shock.*1
IAC
(Idle Air Control)A rotary solenoid type IAC valve controls the fast idle
and idle speeds.
(1-Coil Type
Built-in Driver)(2-Coil Type)
Fuel Pump ControlFuel pump operation is controlled by signal from the
ECM.Ð
Fuel Cut-Off
Control
The fuel shutoff valves for the fuel tank, fuel pressure
regulator, and delivery pipe are shut off to stop the sup-
ply of fuel when the ignition switch is turned OFF or
during abnormal conditions (such as engine stalling,
SRS airbag deployed, etc.).
Ð
Oxygen Sensor
and Air Fuel Ratio
Sensor
Heater ControlMaintains the temperature of the oxygen sensor and air
fuel ratio sensor at an appropriate level to increase accu-
racy of detection of the oxygen concentration in the ex-
haust gas.
*2
EGR Cut-Off
ControlCuts off EGR according to the engine condition to
maintain drivability of the vehicle and durability of the
EGR components.
Evaporative
Emission ControlThe ECM controls the purge flow of evaporative emis-
sions (HC) in the charcoal canister in accordance with
engine conditions.
Ð
Air Conditioning
Cut-Off ControlBy turning the air conditioning compressor ON or OFF
in accordance with the engine condition, drivability is
maintained.
*3*3
When the ECM detects a malfunction, the ECM diag-
noses and memorized the failed section.
DiagnosisThe diagnosis system includes a function that detects a
malfunction in the evaporative emission control sys-
tem.
Ð
Fail-Safe
When the ECM detects a malfunction, the ECM stops
or controls the engine according to the data already
stored in memory.
*1: Only for Automatic Transaxle Model
*
2: Air fuel ratio sensor only for California specification model.
*
3: The air conditioning magnet clutch controled by the ECM
APPENDIX
Curb to Curb m (ft.)
Rear
Model Code
Front mm (in.)
Rear mm (in.)4-Door Sedan
ItemArea
Body Type
Vehicle Grade
OverallLength mm (in.)
Width mm (in.)
Height* mm (in.)
Wheel Base mm (in.)
Tread
Rear mm (in.)
Effective Head Room
Front mm (in.)
Overhang
Min. Running Ground Clearance mm (in.)
Angle of Approach degrees
Angle of Departure degrees
Curb Weight
Gross Vehicle WeightFront kg (lb)
Rear kg (lb)
Total kg (lb)
Front kg (lb)
Rear kg (lb)
Total kg (lb)
Fuel Tank Capacity (US.gal., Imp. gal)
Max. Speed km / h (mph)
Max. Cruising Speed km / h (mph)
Acceleration
Wall to Wall m (ft.) 0 to 100 km/h sec.
Valve Mechanism
Brake Type
Parking Brake Type
Brake Booster Type and Size in.
Proportioning Valve Type
Suspension Type
Stabilizer Bar
Steering Gear Type
Steering Gear Ratio (Overall)
Power Steering TypeFront
Front
Rear Front
Rear
5
10
15
20
25
30
35
40
45
50
55
60
65
70
Major Dimensions & Vehicle Weights Performance Chassis
U.S.A.
Shoulder Room
Front mm (in.)
Rear mm (in.)
Front mm (in.)
Rear mm (in.)
Front mm (in.)
Rear mm (in.) Effective Leg Room
Turning Diameter
(Outside Front)0 to 400 m sec.
Engine
Electrical
Engine Type
Bore Stroke mm (in.)
Differential Gear Ratio (Final) Counter Gear RatioIn Fifth
In Reverse Transmission Gear
RatioIn Third
In Fourth In First
In Second
Clutch Type
Transaxle TypeStarter Output kW Generator Output Watts Battery Capacity (5HR) Voltage & Amp. hr. Carburetor Type Compression Ratio Displacement cm
3 (cu.in.)
Max. Torque (SAE-NET) N´m/rpm (lb-ft@rpm) Research Octane No. RON
Max. Output (SAE-NET) kW/rpm (HP@rpm)
Engine
3rd Gear km/h (mph)
4th Gear km/h (mph) 1st Gear km/h (mph)
2nd Gear km/h (mph)
Max. Permissible
Speed
Luggage Compartment Capacity
28
MAJOR TECHNICAL SPECIFICATIONS
LE
SXV23L-AEPNCA
4785 (188.4)
1780 (70.1)
1420 (55.9)
2670 (105.1)
1545 (60.8)
1520 (59.8)
980 (38.6)
940 (37.0)
1102 (43.4)
901 (35.5)
1427 (56.2)
1425 (56.1)
970 (38.2)
1140 (44.9)
130 (5.1)
165
165
860 (1896)
595 (1312)
1455 (3208)
970 (2140)
950 (2095)
1920 (4235)
135 (35.7, 29.2)*1, 43 (11.4. 9.5)*2
0.332 m3 *3, 8.921 ft3
*4
180 (112)
Ð
Ð
Ð
66 (41)
119 (74)
Ð
Ð
11.9 (39.0)
11.4 (37.4)
5S-FNE
16-Valve, DOHC
87.0 91.0 (3.43 3.58)
2164 (132.0)
11.0 : 1
SFI
130
88/5200 (118/5200)
178/2400 (131/2400)
12 ± 55
960
1.4
Ð
A140E
2.810
1.549
1.000
0.706
Ð
2.296
0.945
4.176
Ventilated Disc
L.T. Drum
Drum
Tandem 8º + 9º
Dual-P Valve
MacPherson Strut
MacPherson Strut
STD
STD
Rack and Pinion
17.4 : 1
Integral Type
*: Unladed Vehicle
*
1: Water Volume
*2: Equivalent Gasoline Capacity
*3: VDA
*4: SAE Suitcase
