Page 592 - Foton Workshop Manual - Tunland (AT)

04-446 DIAGNOSTICS - ENGINE CONTROL SYSTEM

SLOW MOTOR TURNING OF ENGINE (ELECTRIC STARTER

MOTOR)

Fault phenomenon Diagnosis logic Possible reasons

• Engine oil • Poor engine oil quality
04 • Battery • Battery fault
• Starter or starter circuit • Starter or starter circuit fault

Slow motor turning of engine • Crankshaft • Crankshaft fault
(electric starter motor) • Camshaft • Camshaft fault
• Timing mechanism • Overhead mechanism fault
• Injection timing • Injection timing fault
• ECM • ECM fault

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 . ECM fault
(a) Check whether the battery is in normal status.

Is the inspection result normal?
YES>To step 3.
No >Maintenance related faults.

3 . Check engine oil
(a) Check the quality of engine oil is accord with standard.
Is the inspection result normal?

YES>To step 4.
NO>Replace engine oil.

4 . Check starter and starter circuit
(a) Check whether the starer is damaged.
(b) Check whether the starter circuit is normal.
Is the inspection result normal?

YES>To step 5.
No >Maintenance related faults.

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