Doosan D35S-5 Service Manual page 159

Engine hesitation or poor acceleration
Check clutch or brake
Check sir cleaner element
Self diagnosis check
Check injection timing
Check fuel pressure
Check injector
Check engine control system
D439E Service Manual
OK
OK
OK
OK
OK
OK
• Clutch slip
• Brake slip
Clean or replace element
NG
Trouble code
• Use Hi-scan
NG
Check fuel system
NG
• Supply pump
• Fuel filter
NG • Fuel pressure regulator
• Injector state
NG
• Wiring connection
• Power to ECU
1. Fusible link
2. Fuse
3. Control relay
• Engine coolant temperature
NG
sensor
• Injection signal circuit
1. Injector wiring
2. ECU
157 4. Fuel system