Chery automobile Service Manual page 197

SAFETY PRECAUTIONS OF SYSTEM MAINTENANCE
SAFETY PRECAUTIONS IN DIAGNISIS AND MAINTENANCE OF THE
GASOLINE INJECTION ELECTRONIC CONTROL SYSTEM
(1) Removal/installation requirements of controller
The battery negative grid must be disconnected first, followed by the removal of
controller prior to carrying out electric welding or baking finish;
In removing/installing the controller, the ignition switch must be turned to "OFF"
position to avoid being damaged;
The power supply wire should not be removed from the battery while the engine is
running or the electrical system is in operation;
Don't start the engine with high current of charger;
Pay attention to keep the ambient temperature around controller less than 80 .
(2) Cleanliness requirements: following rules shall be complied strictly before
operating the fuel supply system and fuel injector system:
All the dismantled parts must be placed in clean environment and covered properly. It
is not allowed to use the fiber-sloughing cloth.
(3) All the wiring harness and the same for diagnostic tester can only be disconnected
or connected after the ignition switch has been turned off;
Ensure the wiring connection is correct before carrying out the voltage or grounding
measurement for the electronic control system.
Remove the power supply wire from battery or disconnect the wiring harness
controller connectors will cause the loss of diagnostic information and memory.
(4) Notes for maintaining the fuel supply system:
Attention must be paid to the followings when removing and installing the fuel pump
on a fully or semi-fully filled fuel tank:
A device that can fully absorb the potential leaked fuel should be available near the
fuel tank opening before carrying out the operation;
Avoid the skin come into direct contact with fuel;
Thoroughly clean the place and around it before loosening the connecting parts;
Put rags around the connecting parts in order to prevent the fuel from spraying via the
loosened part;
The disassembled parts that are not intended to be repaired immediately should be
covered or closed carefully;
G-88