Nissan Almera Tino V10 (2001 year). Manual - part 104
SEF437Y
Description
NLEC0714
SYSTEM DESCRIPTION
NLEC0714S01
The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives
the signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROL
NLEC0714S02
In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROL
NLEC0714S03
Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSOR
NLEC0714S04
The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSOR
NLEC0714S05
The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC0715
Remarks: Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
FUEL TEMP SEN
+
Engine: After warming up
More than 40°C (104°F)
SPILL/V
+
Engine: After warming up, idle the engine.
Approx. 12 - 13°CA
INT/A VOLUME
+
Engine: After warming up, idle the engine.
Approx. 150 - 450 mg/st
F/CUT SIGNAL
+
Engine: After warming up
Idle
ON
DTC P1251 P4·SPILL/V CIRC
YD22DDTI
Description
EC-1225