Chery A11 2003 Repair Manual page 619

b voltmeter method:
Remove sensor connector, turn ignition on, measure 5V reference voltage at sensor
connection. Connect a voltmeter between Pin B22 and ground. If 5V reference voltage is
not sufficient, check ECU voltage at this wire. If ECU voltage is normal but not sufficient at
sensor, repair 5V reference voltage wire. If ECU voltage is low, test ECU. Connector
sensor connector, turn ignition on, connect a voltmeter between sensor signal wire (Pin B17)
and ground wire. Voltmeter reading shows throttle open signal from sensor to ECU. Depress
throttle slowly and watch voltage change. Voltage reading should be even and increase
gradually. Voltage output should be 0.5±0.02V when engine idles and ≤4.85V
throttle wide open.
Fuel supply system
2.2.1 fuel filter
a DO NOT install fuel filter at an opposite direction, otherwise a new one should be
installed (even it has been used for a short time). There is an arrow marked on fuel filter
house showing fuel direction.
b Fuel filter should be replaced every 20000-30000km. After replacement, start engine
and check if there exists fuel leakage.
2.2.2 fuel injector
If vehicle is not used for a long time, run engine for 3-5 minutes every 2-3 months to
avoid fuel injector being blocked.
Fuel injector must be washed at least one time once a year.
Fuel injector specifications:
Coil resistance: 13.7±0.68Ω
Coil induction: 19.6±1.9Mh
2.2.3 fuel pressure regulator
Fuel pressure regulator is used to maintain fuel pressure to fuel injector within specification.
Remaining fuel is returned to fuel tank through fuel return pipe.
1 Connecting to vacuum connector
2 Connecting to return pipe, maintaining a constant pressure
to fuel tank.
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