Chery A21 2005, Service Manual, Page: 350 / 475

CHERY
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A21 SERVICE MANUAL ENGINE EFI SYSTEM
27
causticity liquid to wash it; 3, avoid it from
distorting by outside force.
Simple measurement method: connect fuel
pressure gauge at fuel intake pipe, start the
engine and make the engine running at idle speed;
check the fuel pressure around 350kPa or not;
step on the gas until the engine speed to
2500rpm,and observe if the fuel pressure at
around 350kPa.
3.13 ELECTRONIC THROTTLE VALVE AND
ACCELERATOR
1)Exterior drawing and pin
l
Accelerator pin definition
Pin No.1 and No.2 is the anode of the 5V
reference voltage
Pin No.3 and No.5 is the cathode of 5V reference
voltage
Pin No. 4 and No. 6 is output voltage signal
l
Electronic throttle valve pin definition
Pin No. 1 is motor anode.
Pin No. 2 is potentiometer anode.
Pin No. 3 is potentiometer cathode.
Pin No. 4 is motor cathode.
Pin No. 5 is signal output 1.
Pin No. 5 is signal output 2.
2)Installation position : Electronic throttle valve:
front end of intake manifold; accelerator: driver
cockpit.
3)Working principle : The engine on time torque
requirement was transferred from accelerator to ECU,
and ECU sends impulse electronic signal to electronic
throttle valve according to torque requirement
information; the motor is running and drive throttle
valve to its opening required degrees; this throttle
valve can stay at one fixed position or change to
another position upon required to meet the
Chart 3-25 Circuit Diagram of
Accelerator
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