Page 624 - Foton Workshop Manual - Tunland (AT)

04-478 DIAGNOSTICS - ENGINE CONTROL SYSTEM

(a) Check whether it has leakage or block in the oil inlet or not.
(b) Check whether the fuel filter is blocked or not.

Is the inspection result normal?
YES>To step 10.

04 No >Clean and change the default parts.

10 . Check the fuel injector
(a) Unplug the injector connector.
(b) Remove the fuel distribution pipes and injector outside the engine together.
(c) Add the battery voltage of 12 V directly to the injector.
(d) Every injector shall inject the fuel according to the standard flow and have uniform
atomization.

NOTICE
When check the injection status of the injectors, the fuel amount the four cylinder
injectors spraying differs largely in the same conditions, then it should change the
injector. Check whether the injector nozzle has colloidal substances or not, if it has,
it may use cleaning agent to soak and spray, or it may cause the insufficient of fuel
or bad acceleration etc.

DANGER
When testing the fuel system:

• Place a note with "Caution: Flammable" in the work area.
• Must work in a well ventilated area and with a carbon dioxide extinguisher.
• Smoking is strictly prohibited when working on the fuel system. Work areas
should be away from open flames and sparks.
• Put the fuel in an explosion proof container.

Is the inspection result normal?
YES>To step 11.
No > Clean the injector. Check the working conditions of the injector again. If the
injection is still abnormal, replace the injector.

11 . Check the exhaust system
(a) Check the exhaust system.
(b) Use the exhaust back pressure gauge to check whether the exhaust pipe is blocked.
Is the inspection result normal?

YES>To step 12.
No> Clean, repair or change the default parts.

12 . Check postprocessing DPF system

(a) Check postprocessing DPF system
Is the inspection result normal?

YES>To step 13.

Page 624