Page 617 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-471

EXCESSIVE OIL CONSUMPTION

Fault phenomenon Diagnosis logic Possible reasons
• Oil filter leakage
• Engine oil filter
• Lubrication system fault
• Lubrication system
• Oil condenser fault
• Oil condenser 04
• Crankcase ventilation
• Crankcase ventilation
system fault
system
• Turbocharger fault
Excessive oil consumption • Turbocharger • Valve oil seal fault
• Valve oil seal
• Piston ring fault
• Valve guide pipe
• Valve guide pipe fault
• Piston ring
• Too long oil maintenance
• Oil maintenance period
period
• Engine oil
• Poor engine oil quality

Diagnosis Procedure

1 . Check the engine data

(a) Ignition switch: OFF.
(b) Connect the diagnosis tool with the fault diagnosis connector (16 pins) on the lower
left of the dashboard.
(c) Ignition switch: ON, and start the diagnostic tool.
(d) Read the motor data shown on the diagnostic tool.

Check whether the data flow is normal or not.
YES>To step 2.
No >Maintenance related faults.

2 . Check engine oil
(a) Check the quality of engine oil is accord with standard.

Is the inspection result normal?
YES>To step 3.
NO> Replace new oil.

3 . Check oil maintenance period
(a) Check whether engine oil maintenance period is accord with the standard.

Is the inspection result normal?
YES>To step 4.
NO>Replace engine oil.

4 . Oil condenser
(a) Check whether the engine oil filter leaks.
Is the inspection result normal?

Page 617