supply, short to ground or open, the malfunction flag
bit is set. The closed loop control of the oxygen sensor
and its memory precontrol are disabled, but the last
data stored in its memory is valid. After the
malfunction is fixed, the malfunction flag bit will be
reset.
Working pressure: 350 kPa
Resistance of the fuel injector: 11-16
Ω
Pins: Each fuel injector has two pins. Of which the
one marked by “+” is connected to the 87# pin of
output terminal of the fuel pump relay; the other is
connected to the 27#, 6#, 7#, or 47# pin of the ECU
respectively.
Troubleshooting: The common malfunctions of the
fuel injector such as unsmooth fuel injection and
defective atomization are normally resulted due to long
term use of the engine. So the fuel injector shall be
cleaned periodically. The circuit short or open in the
internal coil of the fuel injector also will result
malfunction of the fuel injection system. Verify that the
system circuits are short or open.
※ Idle actuator with step motor DLA
Function: The idle actuator with step motor is also
equipped with a bypass air intake duct. If the throttle is
closed air can enter the engine through such bypass
duct. The ECU can adjust the sectional area of the
bypass duct through this step motor, control the air
intake flow and in turn control the quantity of fuel
injection based on the air flow. The increase or
decrease of the engine rotary speed can be achieved
through increasing or decreasing the sectional area of
the bypass duct under idle speed, through which the
closed loop control of engine rotary speed under idle
speed is achieved eventually.
Idle actuator with step motor
Connected to the
87# pin of the
main relay
Circuit diagram of the solenoid fuel injector