Chery S11 / Chery QQ. Manual — part 228

Chery QQ Maintenance Manual 465 EFI System

driver. When injector driver is short to battery voltage or overload, short to ground or open,
ECU will mark malfunction position. Oxygen sensor close-loop control and self-study
pre-control will shut off. The last self-study data is effective. After troubleshooting,
malfunction position resumes.

Injector

The diagram of injector

Pins: There are 2 pins on each injector. One of pins marked (+) on side of shell connects pin
87 on pump relay, and another connects pin 17,16, 35, 34 on ECU.

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Chery QQ Maintenance Manual 465 EFI System

9. Step motor DLA
Function: Step motor with idle actuator offers by-pass intake air channel. When throttle
closes, air will enter engine through the channel. ECU can regulate the section of channel to
adjust mass airflow and adjust inject fuel amount. When engine works, ECU will control step
motor according to different working conditions to change the operation of engine. ECU
increases or reduces the section area of by-pass channel to increase or reduce engine speed to
realize engine close-loop control at idle.
Constitute and principle: Step motor is a micro motor that consists of several steel stators
and one rotor. A coil is reeled on each stator. Rotor is a permanent magnet with a nut on the
center. All stator coils is always connected with electricity. If changing current direction in
one coil, rotor will turn a degree. When current direction in each stator coil is changed in
suitable order, revolutionary field is formed to run rotor in certain direction.
Disgnosis: ECU can monitor the short or open of two coils for step motor and lights MIL.
Engine runs at malfunction mode.

Step motor

The diagram of step motor

Pins:
PinA: Connect pin 29 on ECU.
PinB: Connect pin 4 on ECU.
PinC: Connect pin 26 on ECU.
PinD: Connect pin 21 on ECU.

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Chery QQ Maintenance Manual 465 EFI System

10. Ignition coil ZSK-ROV
Function: Ignition coil transforms low voltage on primary coil into high voltage on
secondary coil and produces sparks through spark plug to light fuel-air mix in cylinder.
Constitute and principle: Ignition coil consists of primary coil, secondary coil, iron core and
shell. When battery voltage supplies on primary coil, the coil is charged. Once ECU cuts off
the return loop of primary coil, charging stops. The high voltage is induced in secondary coil
at same time.
Diagnosis: ECU does not have diagnosis function for ignition coil. So if ignition coil is fault,
DTC does not exist. It can judge if the coil works normally only by checking resistance of
ignition coil. Usually, ignition coil produces more heat during the working, but over heat of
coil will result in increasing for coil resistance. It will cause unstable running and
automatically stopping work for engine.
Primary coil: 0.47 ohms.
Secondary coil: 8 ohms.

Ignition coil( with distributor)

The diagram of ignition coil( with distributor)

Pins: There are 2 pins on low voltage side of coil. Pin marked (+) connects battery and the
other connects ECU.

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Chery QQ Maintenance Manual 465 EFI System

11. Canister control valve
Usage: The valve is used to control flux to clean canister. The valve is controlled by ECU
according to engine load, lasting time and frequency of pulses. The fuel vapor in canister will
accumulate to leak fuel for polluting environment. The function of canister solenoid is to open
the solenoid to pass superfluous vapor into intake air pipe to be in combustion.
Constitute an principle: The valve consists of magnetic coil, iron core and valve body.
There is filter on inlet. Mass flow through the valve is related with the frequency of electric
pulses that put out to control valve by ECU and with the pressure differential between inlet
and outlet. If no pulses, canister control valve will close. ECU controls the electrify time for
canister solenoid to indirectly control the mass flow of clearing air.
Diagnosis: ECU does not have diagnosis function for canister control valve, but can
diagnoses canister control valve driver. When canister control valve driver is short to battery
voltage or over load, short to ground and open, the basic self-study of fuel metering
close-loop control is shut off. If canister solenoid is fault, engine will be unstable idle or over
high idle.

Canister contorl valve

The diagram of canister control valve TEV-2

Pins: There 2 pins on canister control valve. One connects pin 87 on main relay and the other
connects pin 5 on ECU.

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