Chery A11 2003 Repair Manual page 250

Malfuction
Vehicle cannot start
Difficult to start;
idling speed too
high or too low
warning light on
During idling,
warning light on for
a long time
warning light
doesn't turn on
Rough idling at high
temperature.
Rough idling at low
temperature.
Idle intermittent
wave
Idling speed
fluctuates
continuously at high
temperature.
Vehicle performance
deteriorates
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5.malfaction, cause and correction
cause
Fuel pump. fuel
check for operation by CHECK—UP1
injector IVM523
Tachometer
Check wring, sensor resistance and installation of the sensor.
senser.
Dual relays Check for function, connector connection and blown fuse.
35——pin
Check for the wiring connection to ECU.
connection
Engine idling
check for solenoid operation and 4—pin connection by
speed control
CHECK—UP1.
solenoid.
Check for the wiring, proper sensor tightening torque and the
λsensor
sensor heater's operation
Diagnosis
Check for the signal wiring grounding.
warning light
Diagnosis
The bulb is broken or circuit is open
warning light
Throttle valve
sensor or water the throttle valve opening angle and water temperature signal
temperature displayed by CHECK—UP1 should match the engine operation.
sensor
coolant
temperature
The temperature indicated should be in the vicinity of the
sensor or intake
ambient temperature.
air temperature
sensor
1.check the throttle valve cable for proper adjustment, smooth
movement.
2.if the throttle valve cable is correctly adjusted and may move
smoothly, remove it. Check the throttle valve for resistance by
turning it with a hand (for friction)；
1—throttle
3.display the throttle valve position by CHECK—UP1. If both 1
valve body
and 2 are correct and engine speed is still high , while
30MM4
CHECK—UP1 displays "angle is greater than the allowable
angle", then the malfunction is positively determined. It is
necessary to replace the throttle valve potentiometer. If the angle
is within the specified range, sensor wiring and connector should
be checked.
1. check the above item 1,2,3 for intermittent idling speed
functions;
1.throttle valve 1.2 check the seal between cylinder head and throttle valve body;
body 1.3check the vacuum lines to the two vacuum passages,
1.2 seal which are of absolute pressure. check the fuel vapor
recirculation
vacuum
1.3
connection
valve body and intake manifold.
Check the vacuum tube sealing in intake manifold for brake
servo .
1. Check for fuel supply. If fuel pressure is 1±0.1bar, it is ok;
1—fuel supply
2. If malfunction still remains after upper throttle body
system
(30mm12) is replaced, with a pressure regulator in the upper
throttle body, check fuel filter and fuel pipes.
CAC Gasoline Engine Maintenance And Servicing Manual
Correction
passages, which are connected to the throttle
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