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12.4 Warm Starting Difficulty
No. Operating steps Result Follow up steps Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a special diagnostic tester to check if any failure information record exists. No Next step Yes Next step 2 Connect fuel manometer valve. Short 30# and 87# pins of fuel pump relay to make the fuel pump run, and then check if fuel pressure is around 400kPa. No
9 Yes Next step 3 Disconnect the connecting oil pipe and turn off the ignition switch. Observe the voltage of fuel system and look if it is around 300 kPa after an hour. No Repair the fuel system to avoid leakage Yes Replace fuel pressure regulator 4 Put the connecting oil pipe through, use fuel tube clamp to intercept the oil return pipe, meanwhile, close the fuel manometer valve. Turn off the ignition switch, after one hour, observe if pressure of fuel system still can maintain at around 400kPa. No Next step Yes Replace the injector and fuel pipe 5 Check if there is fuel leakage of fuel injector and oil pipe.
No Next step Yes Check coolant temperature and circuit 6 Pull out water temperature sensor joint and start the engine. Observe if the engine can start with success. No Next step Yes Next step 7 Connect an adaptor between ECU and harness, check if a voltage around 5V is present on 39#, 17# pins, meanwhile, check if the resistance value of water temperature sensor is within normal scope. No Repair or replace the harness Yes End 8 Replace ECU and perform warm start again; observe if the engine can be started successfully. No Replace ECU Yes Next step 9 Check if there is jam or bending of fuel pipe and if the pressure regulator valve of oil pump is working correctly. No Repair or replace Yes Next step 10 Check if there is battery voltage between the plugs of oil pump with multimeter. No Repair or replace fuel pump relay and wires Yes Next step 11 Try to replace the fuel pump and see if the system can return to normal. No Replace fuel pump |