Page 587 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-441

Is the inspection result normal?

YES>To step 4.
No >Maintenance related faults.

4 . Check fuel
(a) Check the quality of fuel is accord with standard. 04

Is the inspection result normal?
YES>To step 5.

NO> Replace fuel.

5 . Check high pressure fuel pump actuator circuit
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Check whether high pressure fuel pump actuator circuit can work properly.

Is the inspection result normal?
YES>To step 6.

NO >Repair or replace fuel pump actuator wire harness.

6 . Check pressure of the fuel system
(a) Check pressure of the fuel system. ( Refer to " Chapter 13 Fuel system, Precaution")

Is the inspection result normal?
YES>To step 8.
NO >Repair or replace fuel system components. If the pressure is too low, go to step
7.

7 . Check the fuel supply of the fuel 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 8.
No >Clean and change the default parts.

8 . 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.

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