Table 1-58 (Continued) 77 S/N Operation Test Results Actions 4 Check if the intake air manifold pressure is between 35kPa and 65kPa under idle speed. Yes Next step No Remove leakage for the air intake system 5 Connect the fuel pressure gauge valve. Short-circuit the pin 30 and the pin 87 of the fuel bump relay, and run the fuel pump. Check if the fuel pressure is about 300kPa. Yes Next step No 9 6 Connect the battery and the fuel injector with a special connector. With the voltage supply of 12V, check the fuel injector for normal operation. Yes 8 No Next step 7 Clean the fuel injector and check the fuel injector for normal operation.
Yes Replace No Replace fuel injector 8 Check if the fuel is wrong or contains water. Yes Replace fuel No 14 9 Check if the fuel pressure is lower than 250kPa. Yes Next step No 13 10 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 12 11 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 12 Check the fuel intake pipe for leakage or blockage.
Yes Repair or replace fuel intake pipe No Replace fuel pump 13 Check if the fuel return pipe is blocked or bent. Yes Repair or replace fuel return pipe No Replace fuel pressure regulator 15 Take out the coolant temperature sensor, and check the engine for normal operation. Yes Replace coolant temperature sensor No Next step 16 Check the compressed pressure. Yes Next step No Remove the trouble 17 Check the resistance of the high voltage wire for each cylinder. Is the resistance OK? Yes Next step No Replace 18 Check the ignition coil for damage or crack. Yes Replace No Next step 19 Check the spark plug for normal operation. Yes Replace ECU No Replace spark plug