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3-12 FUEL SYSTEM (DFI)
Specif ications
Item Standard
Digital Fuel Injection System
Idle Speed 1 100 ± 50 r/min (rpm)
Throttle Assy:
Type Four b
arrel type
Bore 38 mm (1.5 in.)
ECU ( Electronic Control Unit):
Make Denso
Typ
e
Digital m emory type, with built in IC igniter, sealed with resin
Usable engine speed 100 ∼ 11 160 r/min (rpm)
Fuel Pressure (high pressure l ine):
Right after Ignition switch ON 310 kPa (3.2 kgf/cm², 46 psi) with fuel pump running
After 3 sec from Ignition switch
ON
290 kPa (2.9 kgf/cm², 43 psi) with fuel pump stopped
With engine idling 310 kPa (3.2 kgf/cm², 46 psi) with fuel pum p running
F
uel Pump:
Type In-tank friction pump
Discharge
67 mL (2.3 US oz) or more for 3 seconds
Fuel Injectors:
Type INP–250
Nozzle type One spray type with 4 holes
Resistance
about 11.7 ∼ 12.3 Ω at 20°C (68°F)
Main Throttle Sensor: Non-adjustable and non-removable
Input voltage
4.75 ∼ 5.25 V DC between BL and BR/BK leads
Output voltage at idle throttle 0.99 ∼ 1.03 V DC between Y/W and BR/BK leads
opening
Output voltage at full throttle 4.19 ∼ 4.39 V DC between Y/W and BR/BK leads
opening
Resistance 4 ∼ 6kΩ
Inlet Air Pressure Sensor or
Atmospheric Pressure Sensor:
Input voltage
4.75 ∼ 5.25 V DC between BL and BR/BK leads
Output voltage 3.74 ∼ 4.26 V DC at standard atmospheric pressure (see
this text for details)
Inlet Air Temperature Sensor:
Resistance
1.6 ∼ 3.7 kΩ at 20°C (68°F)
0.24 ∼ 0.43 kΩ at 80°C (176°F)
Output voltage at ECU about 2.25 ∼ 2.50 V @20°C (68°F)
Water Temperature Sensor:
Resistance
see Electrical System chapter
Output voltage at ECU about 2.80 ∼ 2.97 V @20°C (68°F)
Speed Sensor:
Input voltage at sensor about 9 ∼ 11 V DC at Ignition S witch ON
Output voltage at sensor about 0.05 ∼ 0.07 V DC at I gnition Switch ON and 0 km/h
Vehicle-down S ensor:
Detection method
Magnetic flux detection method
Detection angle More than 60 ∼ 70° for each bank