Table 1-54 (Continued 1) 71 S/N Operation Test Results Actions 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 Wash the fuel injector and check the fuel injector again for normal operation. Yes Next step No Replace fuel injector 8 Replace the fuel. Check if the fuel is wrong or contains water. Yes Replace fuel No 14 9 250kPa 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 Repair or replace fuel return pipe No Replace fuel pressure regulator 14 Before the engine coolant reaches 35°C, take out the idle speed actuator connector, and check if the rotation speed of the engine is decreased. Yes Next step No Replace idle speed actuator 15 Turn the ignition switch to ON. Check the voltage of the following pins of the ECU. Is the voltage of the pin J1-12 (crankshaft position sensor) is about 12V? Is the empty pin and the pin J1-54 (idle speed stepper motor A+) is 0V? Yes Next step No Check harness and interface 16 Keep the engine at idle speed.
After the coolant reaches normal temperature, ground the pin 51 of the ECU with a short-connected line. Check if the ignition advance angle is a 6.75° crank angle. Yes Next step No Adjust ignition advance angle