3.1.13-10
CS35 2013.04
3.1.13-10Electronic Control System - ME7
The fuel tank pressure control valve is used to
maintain the constant tank pressure. When the
fuel tank pressure is E and reaches specified
value, this valve opens to make the vapor flow
into the carbon canister. On the contrary, when
the tank pressure is negative and reaches its
specified value, open the valve so that air could
go into the tank.
Component Description
Engine Control Module (ECM)
Engine control module ECM is installed at the
right vibration absorber, to receive the input sig-
nals, output the control signal and inspect the
system state, record the DTC when there is and
turn on the malfunction lights.
Air Intake Pressure Temperature Sen-
sor
Air intake temperature and pressure sensors are
installed on the intake manifold, integrated with
air intake pressure and temperature sensors. Two
sensorās signals are taken as the signal for air
measurement. The measurement of intake pres-
sure sensing device changes as the intake mani-
fold pressure changed that caused by the change
of engine load and speed. It transforms the
changes into output voltage. Intake air tempera-
ture sensor is a negative temperature coefficient
resister.
Water Temperature Sensor ECT
The water temperature sensor is directly mounted
near the coolant output plug in the cylinder head.
Water temperature sensor is a negative tempera-
ture coefficient (NTC) resistor. ECM calculates
coolant temperature by voltage drop of water tem-
perature sensor. The signal of water temperature
sensor is supplied to ECM to control cooling fan
motor and to judge fuel and ignition according to
engine status. Water temperature sensor output
also offers input signal to instrument panel ther-
mometer.
Electronic Throttle Assembly
The electronic throttle assembly integrates the
actuating motor and the two throttle position sen-
sor. The electronic throttle valve casing is driven
by the drive motor through a set of reducing
mechanism and meanwhile the throttle position
sensor can real - time monitor the motor position.
The electronic throttle can adjust the engine load
through electronic pedal signal, which can control
the throttle opening through a DC motor to make
the engine from the idle position to full load.
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