II. Operation
SQR480EC electric fuel injection system controls ignition, fuel injection, idle ect. upon
engine speed signal, air intake pressure, throttle position signal, air temperature signal,
oxygen sensor signal and coolant temperature signal. The system utilize an advanced
control strategy, and selected components and a complete set of strict production process,
and is an electric fuel injection system featuring intelligence and stability, meets the strict
technological demands of car manufacturer with the exhaust meeting the Euro II standard.
The fuel system offers a 2.5 Bar fuel supply pressure.
2.1 electric control system
2.1.1 ECU
Parameter Unit Minimum Maximum
Operating
voltage
Volt 6.5 16
Operating
current
Ampere 0.01 0.1
Operating
temperatu
re
Centigrade -40 85
Humidity %RH 20 85
Vibrating
frequency
HZ … 1000
ECU operation ambient temperature range is -40℃---+85℃, therefore, before baking
varnish for the automobile body, it should be removed first, and the temperature should be
under strict control to avoid ECU being damaged.
2. ECU damage has a low damage probability (damage ratio less than 1/1000 after 100000
KM mileage) and do not suspect the ECU damage. Even ECU damage is suspected, do not
attempt to disassemble it (replace the internal core) because a defective ECU can not be
repaired.
EI system wiring harness
For MPI-ECU wiring harness assembly (multi-port fuel injection---ECU wiring harness),
see illustration.
Engine wiring harness
See illustration.
Water Temperature Sensor
Sensor has 2 leads, one is signal lead (pin B10) and the other is ground lead (pin B23)
Water
Temperature
Ohm
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