Page 579 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-433

ENGINE STARTING DIFFICULT OR UNABLE TO START

(EXHAUST, SMOKE)

Fault phenomenon Diagnosis logic Possible reasons

• Injector fault
• Leakage in the intake 04
• Possible reasons
system
• Fuel pipe
• Low fuel pressure
• Fuel system
• Air filter blocked
• Cylinder compression
Engine starting difficult or • High pressure oil pump
pressure
unable to start (exhaust, • Injection timing blocked
smoke) • Incorrect injection timing
• Intake heater
• Intake heater fault
• Intake system
• Too low of the cylinder
• Exhaust system
compression pressure
• ECM
• Exhaust system blocked
• ECM fault

Diagnosis logic

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 the intake system
(a) Check whether air filter is blocked.
(b) Check whether pipe of the intake system leaks.
(c) Check whether turbocharger can work properly.

Is the inspection result normal?
YES>To step 3.

No >Maintenance related faults.

3 . Check intake heater and its circuit
(a) Check whether the intake heater is damaged or not.
(b) Check whether the intake heater circuit is normal or not.

Is the inspection result normal?
YES>To step 4.

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