Service manual

No 17
Yes Next step 12 Check if the fuel pressure value is below 300 kPa.
No 16
Yes Next step 13 Close the fuel manometer valve. Re-engage the
ignition switch to let the fuel pump run for a
period of time, and then check if fuel pressure can
be built up.
No 15
Yes Check fuel pressure
regulator and fuel
pump
14 Open the valve of fuel gauge and clamp the oil
return pipe by oil return baffle so that the oil can
not return. Check if the oil pressure occurs
immediately.
No Repair and replace
fuel injector and oil
pipe
Yes Repair or replace
oil intake pipe
15 Check if the oil intake pipe is leaky or jammed.
No Replace oil pump
Yes Repair or replace
oil return pipe
16 Check if the oil return pipe is bended or jammed.
No Replace fuel
pressure regulator
or fuel pump
Yes Next step 17 Check if the pressure of cylinder is normal.
No Troubleshooting
Yes Repair 18 Check if the engine air intake system is leaky.
No Next step
Yes Repair or replace 19 If air cleaner or airflow sensor is choked.
No Replace ECU
Note: The cold starting problem relates to more failure points, among which water
temperature sensor is comparatively important, because it is the major parameter for
determination of injection pulse-width when starting the engine. In case of a water
temperature sensor failure or it generates a false signal, the system can not judge the
temperature and starting difficulty may occur.