Error Code [206] (Short Circuit In Travel Speed Shifting Solenoid) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [206] (Short circuit in travel speed shifting solenoid)

User code Error code
– 206
Contents of
• When the signal is output to the travel speed shifting solenoid circuit, an abnormal current flows.
trouble
• Turns the output to the travel speed shifting solenoid circuit OFF.
Action of
• Even if the cause of the failure disappears, the system does not reset itself until the starting switch is
controller
turned OFF.
Problem that
appears on • The travel speed is not set to HI (The swash plate angle of the travel motor is not set to the minimum).
machine
Related • The operation state (ON/OFF) of the travel speed shifting solenoid can be checked with the monitoring
information function. (Code: 023, Left of lower line)
Defective travel speed
1 shifting solenoid (Internal
short circuit)
Possible causes
Short circuit with chassis
and standard
ground in wiring harness
2
value in normal
(Contact with ground cir-
state
cuit)
Defective governor and
3
pump controller
20-326
(1)
Short circuit travel speed shifting solenoid
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (2) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C03 (female) (27) – V04 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
Between (27) and
chassis ground
V04 (male)
Between (1) and (2)
Travel speed switch
C03
and travel lever
Lo + Neutral
Hi + Travel position
[206]
Resistance
20 – 60 z
Min. 1 Mz
Min. 1 Mz
Resistance
Voltage
Max. 1 V
20 – 30 V
PC130-7