Mode Selection - Hitachi 120-3 class Operator's Manual

Problem
Work Mode Selector
Does Not Work
Fast/Slow Travel Speed
Does Not Function
Auto-Idle Does Not Work
TROUBLESHOOTING

MODE SELECTION

Cause
Mode switches
Electrical connector
Wire harness (between Main controller
(MC) and Monitor)
Main controller (MC)
Solenoid valve unit
Travel mode switches
Pilot pressure switch (Travel)
Pump 1,2 pressure sensor
Pump 1,2 control pressure sensor
Pump delivery pressure sensor wire
harness
Main controller (MC)
Solenoid valve unit
Damaged travel motor
Fuse
Switch panel
Electrical connector
Wire harness
ECM
Pressure switches (Travel, Front)
Main controller (MC)
11-8
Solution
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
Replace fuse.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.
See your authorized dealer.