Service manual

FUEL SYSTEM (DFI) 3-15
Specifications
Item Standard
Digital Fuel Injection System
Idle Speed 1 100 ±50 r/min (rpm)
Throttle Body Assy:
Type Two barrel type
Bore 38 mm (1.50 in.)
ECU (Electronic Control Unit):
Make Mitsubishi Electric
Type Digital memory type, with built in IC igniter, sealed
with resin
Usable Engine Speed 100 ∼ 8 700 r/min (rpm)
Fuel Pressure (High Pressure Line):
With Engine Idling 294 kPa (3.0 kgf/cm², 43 psi) with fuel pump running
Fuel Pump:
Type In-tank friction pump
Discharge 50 mL (1.7 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)
Throttle Sensor: Non-adjustable and non-removable
Input Voltage DC 4.75 ∼ 5.25 V between BR/W and BR/BK leads
Output Voltage at Idle Throttle Opening DC 1.00 ∼ 1.24 V between Y/W and BR/BK leads
Output Voltage at Full Throttle Opening DC 4.0∼ 4.4 V between Y/W and BR/BK leads
Resistance 4 ∼ 6kΩ
Inlet Air Pressure Sensor:
Input Voltage DC 4.75 ∼ 5.25 V between BR/W and BR/BK leads
Output Voltage DC 3.80 ∼ 4.20 V at standard atmospheric pressure
(see this text for details)
Inlet Air Temperature Sensor:
Resistance 5.4 ∼ 6.6 kΩ at 0°C (32°F)
0.29 ∼ 0.39 kΩ at 80°C (176°F)
Output Voltage at ECU About 2.26 ∼ 2.50 V at 25°C (77°F)
Water Temperature Sensor:
Resistance see Electrical System chapter
Output Voltage at ECU About 2.24 ∼ 2.48 V at 25°C (77°F)
Vehicle-down Sensor:
Detection Method Magnetic flux detection method
Detection Angle
more than 15 ∼ 35° for each bank
Output Voltage with the sensor tilted 15 ∼ 35° or more: 0.4 ∼ 1.4 V
with sensor arrow mark pointed up: 3.7 ∼ 4.4 V
ISC Valve:
Resistance 28.8 ∼ 31.2 Ω at 20° (68°F)
Engine Vacuum 29.6 ±1.3 kPa (222 ±9.8 mmHg) at Idle Speed