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CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM 3 EFI SERVICE MANUAL A21 car is equipped with ME7.9.7 EFI system which developed by UAES. This manual will 1. NOTICE TO THE EFI SYSTEM SERVICE 1.1. GENERAL SERVICE ● Digital multimeter is the only permitted instrument to inspect the EFI system. ● Please use the quality spare parts for service, otherwise can not make sure the EFI work properly. ● Please use lead free gasoline during service. ● Please be obedient to the service and diagnose flow. ● It is forbidden to disassembly the EFI part during service. ● It should be careful to take the electronic component (ECU, sensor, etc.) for preventing from dropping to the ground. ● Please protect the environment, deal with the rejectamenta carefully and effectively. 1.2. NOTICE DURING THE SERVICE ● Do not disassemble any part or inserts of the EFI system from its original position at random to prevent from damaging parts or that moisture and dirt oil come into the inserts. ● Please leave the ignition switch at shut off position when you disconnect and connect the inserts otherwise it will damage the electric element. ● It is must keep the ECU under 80℃, when you do the work of hot status simulation and other works which may cause the temperature increase. ● The supplying oil pressure is high(around 300kPa), all the fuel pipe is made up of anti high pressure pipe. There is high pressure in fuel pipe even the engine does not run. So do ● Do not give electricity to fuel pump when the electrical pump is taken out of fuel tank in order to prevent from electrical spark and cause fire. ● Fuel pump is not allowed to carry out running test at dry or water situation, which will |