All Work Equipment, Swing, And Travel Mechanism Do Not Move - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02632-02
E-5 All work equipment, swing, and travel mechanism do not move
Trouble • All travel, swing, and work equipment mechanism do not move.
Related infor-
—
mation
1 Defective fuse No. 3
Defective safety lock switch
2
(internal disconnection)
Defective PPC lock solenoid
3 (Internal disconnection or
short circuit)
Defective assembled-type
Possible causes
4 diode D01
and standard
(Internal short circuit)
value in normal
state
Disconnection in wiring har-
ness
5 (Disconnection in wiring or
defective contact in connec-
tor)
Ground fault in wiring har-
ness
6
(Short circuit with GND cir-
cuit)
16
Cause Standard value in normal state/Remarks on troubleshooting
If fuse is burnt out, the circuit probably has ground fault.
a
Between (1) – (2)
a
Between (2) – chassis ground
a
a
Wiring harness between F01-3 outlet – S14
(male) (1)
Wiring harness between S14 (male) (2) –
J02 – V01 (male) (2)
Wiring harness between V01 (female) (1) –
chassis ground
a
Wiring harness between F01-3 outlet – S14
(male) (1) and chassis ground
Wiring harness between S14 (male) (2) –
J02 – V01(female) (2), – D01(female) (8)
and chassis ground
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
S14 (female) Lock lever
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V01 (male)
Between (1) – (2)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
D01 (male)
Between (8) – (4)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
40 Troubleshooting
Resistance
Lock Min. 1 Mz
Max. 1 z
Free
Resistance
20 – 60 z
Min. 1 Mz
Resistance
Min. 1 Mz
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
PC300, 350-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz