D439E Service Manual 4. Fuel system
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Troubleshooting Procedure
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
Vehicle supply voltage 2 2 9 3
Main relay 3 3 3 11 4
Fuse/plug wire harness 4 2 8 2
Terminal 46 (Ignition ON/OFF signal) 5 4 4 10 5
CKP sensor 6 6 15 12
Run out of fuel 7
Wrong fuel 8 5 7 2 3 3
Fuel shortage 2
Air mixture in fuel 9 6 8 3 4
Low pressure circuit (fuel) 10 7 12 4 4 7
High pressure circuit (fuel) 14 8 13 12 14 17
Fuel filter 11 9 5 5 5
Supply pump 16 11 6
Fuel pre-heater 12 10 6 6
Wrong injector connection 13 16 3 11 17 13
Injector 15 9 4 9 13 14
Mechanical components
(Pressure valve gap, compression etc)
19 18 16 18 8
Defective ECU 20
TDC sensor 22 5
Water temperature sensor (WTS) 14 2 15
Coolant loss
Glow plug system 21 16
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