D439E Service Manual 4. Fuel system
151
Troubles
Check items
Engine does not crank
Restart after engine stop
Hard to crank the engine
Stay in high rpm (without any
accel pedal pressing)
Knocking during acceleration
(during warm-up)
Vibrates at idle
Lacks of power
Poor engine operation, ignition
fail, knocking
Bucking (sudden movement)
Self-diagnosis 1 1 1 1 1 1 1 1 1
Rail pressure sensor (RPS) 18 15 10 11 15
Accel position sensor (APS) 2 7
Mechanical defect of accel 3 8
Booster pressure sensor 17 8 12
Air filter is clogged 7 2
Defective turbo charger 9
Waist gate valve connection 10
Check the valve tension 16
Clutch switch 6
Brake switch 7
Vehicle speed signal 7
Check the Oil level
Radiator fan
Radiator is defective or clogged
Defective IG switch
AC pressure SW
Plug adhesion 6
Leaks at the connection of turbo and
intake manifold
6 11
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