Page 594 - Foton Workshop Manual - Tunland (AT)

04-448 DIAGNOSTICS - ENGINE CONTROL SYSTEM

POSTPROCESSING DIESEL PARTICULATE FILTER - EXCESS

REMOVAL FOR SOOT

Fault phenomenon Diagnosis logic Possible reasons

• Engine oil • Engine oil fault
04 • Fuel system • Fuel system fault
Postprocessing diesel • Crankcase ventilation • Crankcase ventilation
particulate filter - excess system system fault
removal for soot • Postprocessing DPF • Postprocessing DPF fault
• Exhaust system • Exhaust system 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 . 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 engine oil.

3 . Check crankcase ventilation system
(a) Check whether crankcase ventilation system is normal.
Is the inspection result normal?

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

4 . 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 5.
NO >Repair or replace fuel pump actuator wire harness.

Page 594