Page 600 - Foton Workshop Manual - Tunland (AT)

04-454 DIAGNOSTICS - ENGINE CONTROL SYSTEM

FIXED REGENERATION - CANNOT START

Fault phenomenon Diagnosis logic Possible reasons
• Brake switch fault
• Brake switch
• PTO or remote PTO switch
• PTO or remote PTO switch
04 • Accelerator pedal position fault
• Accelerator pedal position
Fixed regeneration - cannot sensor sensor fault
start • Park brake switch • Park brake switch fault
• Gearshift mechanism
• Gearshift mechanism fault
• Postprocessing DPF
• Postprocessing DPF 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 brake switch
(a) Check whether brake switch is damaged.
(b) Check whether brake switch circuit is normal.

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

No >Maintenance related faults.

3 . Check park brake switch
(a) Check whether park brake switch is damaged.
(b) Check whether park brake switch circuit is normal.

Is the inspection result normal?
YES>To step 4.
No >Maintenance related faults.

4 . Check PTO or remote PTO switch
(a) Check whether the PTO or remote PTO switch is damaged.
(b) Check whether the PTO or remote PTO switch circuit is normal.
Is the inspection result normal?

Page 600