Table 1-55 (Continued) 73 S/N Operation Test Results Actions 10 Clean the fuel injector and check the fuel injector for normal operation. Yes Next step No Replace fuel injector 11 Check if the fuel is wrong or contains water. Yes Renew fuel No 17 12 Check if the fuel pressure is lower than 250kPa. Yes Next step No 16 13 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 15 14 Turn on the fuel gauge valve, and block the fuel return pipe. Check if the fuel pressure is quickly produced.
Yes Replace fuel pressure regulator No Repair or replace fuel injector or fuel pipe 15 Check the fuel intake pipe for leakage or blockage. Yes Repair or replace fuel intake pipe No Replace fuel pump 16 Check if the fuel return pipe is blocked or bent. Yes Repair or replace fuel return pipe No Replace fuel pressure regulator 17 Check if the cylinder pressure of the engine is normal. Yes Next step No emove the trouble 18 Check the air intake system of the engine for leakage. Yes Repair No Next step 19 Check if the intake air manifold absolute pressure and temperature sensor is blocked. Yes Repair or replace No Replace ECU