Komatsu PC58UU-3 User Manual

PC58UU-3 20-403
TROUBLESHOOTING
F-2 Controller does not display [26 (3)] (Traveling accelerator switch)
a The error code is displayed only on the display unit of the controller.
F-2 Related electrical circuit diagram
Cause Remedy
• When traveling accelerator
switch is at HIGH: Max. 1 V
• When traveling accelerator
switch is at LOW: Min. 4 V
• Turn starting switch ON.
1
Is voltage between G1 (5) and
chassis ground normal?
NO
YES
Defective controller Replace
• At HIGH: Max. 1 z
• At LOW: Min. 1 Mz
• Turn starting switch OFF.
• Disconnect switch terminal.
2
Is resistance of traveling accelerator
switch normal?
NO
Defective traveling accelera-
tor switch
Replace
YES
• Max. 1 z
• Turn starting switch OFF.
• Disconnect switch terminal.
3
Disconnection or defective
contact in wiring harness
between traveling accelerator
switch – chassis ground
Disconnection or defective
contact in wiring harness
between traveling accelerator
switch – G1 (5)
Is resistance between traveling acceler-
ator switch and chassis ground normal?
NO
Replace wiring
harness
YES
Replace wiring
harness
F-2
(6)

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English