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Z50 New Model Introduction
January 2006
B – ENGINE CONTROL SYSTEM
VQ35DE Outputs from ECM
3. Electric Throttle Actuator
Electric throttle control actuator consists of throttle
control motor & throttle position sensor (TPS).
The throttle control motor is operated by the ECM and
it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve
position and the opening and closing speed of the
throttle valve and sends the voltage signal to the
ECM. The ECM judges the current opening angle of
the throttle valve from these signals and the ECM
controls the throttle control motor to make the throttle
valve opening angle properly in response to driving
condition.
4. Fuel Pump Control
The ECM activates the fuel pump relay for 1 second
after the ignition switch is turned ON. If the ECM
receives a engine speed signal from the camshaft
position sensor (CMPS), it knows that
the engine is rotating and operates the fuel pump
relay which in turn operates the pump.
If the engine speed signal is not received when the
ignition switch is ON (engine stalls), the ECM will stop
pump operation.
The ECM does not directly drive the fuel pump. It
switches fuel pump relay ON or OFF, which in turn
controls the fuel pump.
The Fuel Pump relay is located with the IPDM E/R
unit.
5. Variable Intake Air System (VIAS)
Control Solenoid Valve
The VIAS control solenoid valve cuts the intake
manifold vacuum signal for power valve control. It
responds to ON/OFF signals from the ECM.
When the solenoid is OFF, the vacuum signal from
the intake manifold is cut. When the ECM sends an
ON signal, the coil pulls the plunger downward and
feeds the vacuum signal to the power valve actuator.
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