Maintenance Manual for Chery·Windcloud
MOTOROLA EFI System
Users are not allowed to adjust throttle valve adjusting screw on throttle body. The position of
such screw has been accurately adjusted in final assembly. Improper adjustment may cause
high idling speed, engine closing down or affect idle speed stability, emission and economical
efficiency of fuel consumption.
4.9 Engine error indicating lamp
Error indicating lamp locates in the front instrument panel. In case serious error occurs, the
lamp will flash, which requires professional mainantenance staff to use corresponding tools to
check vehicle and effect troubleshooting in a timely manner.
4.10 Other precautions
Constant failure of EFI system is caused mostly by defect connection, so the node of each
connector lug shall be clean and safely connected/contacted; electronic control unit is a
component of high quality with little failure, special equipment shall be adopted when
examination is necessary, and random overhauling is not allowed. When ignition switch is
ON, do not proceed with operation of disconnecting any electrical equipment so as to avoid
damage on electronic component caused by induced electromotive force (which is generated
in circuit).
Failure Diagnosis for EFI System:
Generally, the failure of EFI system is caused by the following reasons:
(1) Engine EFI matching problem, generally such problem may occur in the preliminary
stage of vehicle’s coming into the market. For example: unsteady idle speed, flameout,
etc.; and on the other hand, these problems occurein lots, which are undissolvable
basically through maintenance, therefore, if such problems occur, feel free to contact
After-sale Service Dept.
(2) In EFI system, the most frequent problem is caused by defect connection. After
replacing a certain part, many problems are solved and failure is eliminated; however,
when fixing the old part into aother vehicle, the said vehcile can be used normally.
Therefore, it is advisable that the relevant components in EFI system shall be checked
first to see if their connections are in good order when such problems occur.
(3) The EFI system parameter and data flow in the process of maintenance are very
important, therefore, it is advisable not to judge problem simply by failure code during
maintenance, but to judge/settle problem by data flow in combination.
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