Doosan D35S-5 Service Manual page 165

Trouble diagnosis flow for engine stall
Engine stop
D439E Service Manual
ECU
Communication
error
Check main relay
OK
Check ECU fuse
OK
Check
ECU connector for
connection
OK
Check ECU
ground (Battery "-" terminal
with ECU ground and Chassis
ECU ground)
OK
Check if +B terminal
of ECU and both ends of key
switch are 24 V.
OK
Check
communication line
harness connector
163
Defective relay
Replace the relay
Replace fuse
Defective fuse
Key switch : 5A
Main power : 10A
NG
Connect connector
Check wire
Not applied state
harness and repair
or replae
OK
Replace ECU
NG
Repair or replace
harness
4. Fuel system