Kawasaki STX-15F service manual Standard, Digital Fuel Injection System

3-10 FUEL SYSTEM (DFI)

Specifications

Item			Standard
Digital Fuel Injection System
Idle Speed	1 300 ±100 r/min (rpm) -both in and out of water
Throttle Assy:
Type	Single type
Bore		60 mm (2.36 in.)
ECU (Electronic Control Unit):
Make	Mitsubishi Electric
Type	Digital memory type, with built in IC igniter, sealed with
	resin
Operating range	Engine speed range 100 ∼ 8 100 r/min (rpm)
Fuel Pressure (High Pressure Line):
Engine Idling	approx. 294 kPa (3.0 kgf/cm², 43 psi)
Fuel Pump:
Type	Impeller type
Discharge	67 mL or more for 3 seconds
Throttle Sensor:
Input Voltage	4.75 ∼		5.25 V DC between R and BK/W leads
Output Voltage	1.08 ∼		1.18 V DC between G/W and BK/W leads (at idle
	throttle opening)
Resistance	4 ∼ 6 kΩ
Inlet Air Pressure Sensor:
Input Voltage	4.75 ∼		5.25 V DC between R and BK/W leads
Output Voltage	3.75 ∼		4.25 V DC between G/R and BK/W leads at standard
	atmospheric pressure
Inlet Air Temperature Sensor:
Output Voltage at ECU	about 2.3 ∼ 2.6 V @20°C (68°F)
Resistance	5.4 ∼		6.6 kΩ at 0°C (32°F)
	2.26 ∼		2.86 kΩ at 20°C (68°F)
	0.29 ∼		0.39 kΩ at 80°C (176°F)
Water Temperature Sensor:
Resistance	see Electrical System chapter
Output Voltage at ECU	about 3 ∼ 4 V @20°C (68°F)
Vehicle-down Sensor:
Detection Method	Magnetic flux detection method
Detection Angle	more than 110 ∼ 130° for each bank
Output Voltage	with sensor tilted 110 ∼ 130° or more: 0.65∼ 1.35 V
	with sensor arrow mark pointed up: 3.55 ∼ 4.45 V
Fuel Injectors:
Type	INP-281
Nozzle Type	One spray type with 4 holes
Resistance	about 11.7 ∼ 12.3 Ω at 20°C (68°F)
Oil Temperature Sensor:
Resistance	same to water temperature sensor
Output Voltage at ECU	about 3 ∼ 4 V @20°C (68°F)