Chery A11 2003 - Page 230

CAC Gasoline Engine Maintenance And Servicing Manual
86
If stepper motor needs to be replaced, remove the positive connector first and replace actuator. Then
turn ignition key to position 1(accessory position), ECU will readjust actuator position(to limit switch) and
adjust for steps according to engine water temperature so as to adjust idle speed with valve linear (axial
direction)movements(forward or backward).
Only CHECK-UP1 tester may be applied to check whether it’s running properly.
3.1MARWAL low pressure fuel pump“MSS070”
The fuel pump in this system is atmospheric
positive shift (see figure. 142). It is designed to work
with ethyl as its standard fuel and equipped with a
check valve and a pressure override valve (vibration
pressure is 2.6bar). It is installed inside the fuel tank and
equipped with a fuel filter.
Fuel pump supplies the fuel to fuel injectors and is
controlled directly by ECUD to ensure:
·The fuel pump will close when engine speed drops
under the minimum starting speed or engine stops.
· The fuel pump signal is timed. once ignition
switch is on and engine is not started , there will be a
fuel pump signal within 10 seconds.
· Under the engine running and starting conditions,
the fuel pump signal will not change.
Fig. 142 fuel pump
Fig. 141 Idle step motor and air by
-
pass valve
valve
idle actuator
by-pass channel
throttle
valve
throttle
valve
leak
by
-
pass
air control.
feature
parameter
electric connector
outlet
operation temperature
spiral resistance
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