Page 581 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-435

Is the inspection result normal?

YES>To step 8.
No > Clean the injector. Check the working conditions of the injector again. If the
injection is still abnormal, replace the injector.

8 . Check the exhaust system 04
(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 9.

No> Clean, repair or change the default parts.

9 . Check the cylinder pressure
(a) Perform the test of cylinder compression pressure.

Is the inspection result normal?
YES>To step 11.

NO >To step 10.

10 . Check the engine valve timing
(a) heck whether the engine timing gear mark is aligned, damaged or not, the belt is loose,
detaching or not.

Is the inspection result normal?
YES>To step 11.
No > Perform the alignment operation of the timing chin or change the timing chain.

11 . Check the motor machinery
(a) Use an endoscope to observe the in-cylinder condition.
(b) Observe and reflect the voltage changes.
(c) Disassemble and repair the motor internal fault.
Clean the carbon or disassemble and check the motor cylinder cover. Check the valve,
intake manifold has carbon deposition. Such as: the gap between the piston ring and
the cylinder is too tightly loosed, cylinder pad leaks, valve tube loose, valve does not
close well, and valve has carbon deposition.

Is the inspection result normal?

YES>To step 12.
No >Repair the internal machinery fault of the motor.

12 . Replace ECM
(a) Replace ECM. (Refer to "Chapter 11 Engine control system, Engine control module")
(b) Check the data flow of the engine, and make sure the engine phenomenon does not
exist, the system is normal.

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