Lifan — 第一章 电喷系统 英文.pdf

2. If the engine can not be successfully started, carry out the trouble diagnosis and removal as per Table 1-52. Table 1-52 68 S/N Operation Test Results Actions 1 Turn the ignition switch to ON. Check if there is trouble information records with a diagnostic instrument. Yes Remove the trouble No Next step 2 Take out the spark plug, and make the electrode of the spark plug 5-10mm from the engine block. Run the engine with the start motor, and check if the blue white high voltage fire is produced. Yes 8 No Next step 3 Check if the resistance of the high pressure wire is normal (about 16k/m, if too low, the wire is in trouble).

Yes Next step No Repair or replace the high pressure wire 4 Check each ignition coil for damage or crack. Yes Replace No Next step 5 Check the ignition coil for looseness or damage. Yes Replace No Next step 6 Check the ignition coil for normal operation. Yes Next step No Replace 7 Check if the interfaces of the high pressure coil are well connected. Yes Next step No Connect 8 Turn the ignition switch to ON. Check if the fuel pump relay and the fuel pump can keep running for 3 seconds. Yes Next step No Check and repair fuel pump circuit 9 Connect the fuel pressure gauge valve. Short-circuit the pin J1-47 and the pin J1-73 of the fuel bump relay, and run the fuel pump.

Check if the fuel pressure is about 300kPa. Yes Next step No 13 10 Take out the fuel distribution pipe together with the fuel injector. Disconnect the fuel injector from the harness. Check the fuel injector for fuel injection with the voltage of 12V directly from the battery. Yes 12 No Next step 11 Clean the fuel injector and check the fuel injector for fuel injection. Yes Next step No Replace fuel injector 12 Check if the fuel is wrong or contains water. Yes Replace fuel No 18 13 Check if the fuel pressure is lower than 300kPa. Yes Next step No 17 14 Close the fuel gauge valve. Turn on the ignition switch again and keep the fuel pump working for 3 seconds.

Check if fuel pressure can be produced. Yes Next step No 16