Doosan D55C-5 Service Manual

D439E Service Manual 4. Fuel system
154
Troubleshooting Procedure
When communication with diagnosis equipment is not possible (Communication with any system is not
possible)
When communication between diagnosis equipment and ECU is not possible.
Trouble symptoms Probable causes
It shows at least one of the following symptoms.
• When power is not supplied to ECU.
• ECU ground circuit is defective
• Defectives on ECU
• Wrong communication line between ECU and
Hi-scan
• Power supply circuit to ECU is broken.
• ECU is out of order.
• Circuit between ECU and DLC is open.
Engine is not start.
Measure the data link connector
Voltage when grounded with 16 :
battery voltage
Check and repair wire harness
between power source and data
link connector.
Measure the data link connector
• Continuity between 4 and ground
• Continuity between 5 and ground
Check and repair wire harness
between data link connector and
ground.
Replace Hi-scan
OK
OK
NG
NG
Check the power
• Battery
1. Connector
2. Specific gravity, charging
system
3. Drive belt
4. Voltage
• Fusible link
Check starting system
• Start relay
• Starter motor
• Wiring
OK
NG
NG

Doosan D55C-5 Specifications

General

Brand	Doosan
Model	D55C-5
Category	Engine
Language	English