Komatsu PC130-7, Shop Manual

Page: 180 / 342

20-332
PC130-7
TROUBLESHOOTING
Error code [216] (Disconnection in travel speed shifting solenoid)
User code Error code
Trouble
Disconnection in travel speed shifting solenoid
(Governor and pump controller system)
– 216
Contents of
trouble
• When the signal is output to the travel speed shifting solenoid circuit, no current flows.
Action of
controller
• None in particular (Since no current flows, the solenoid does not operate).
• If the cause of the failure disappears, the system resets itself.
Problem that
appears on
machine
• The travel speed is not set to HI (The swash plate angle of the travel motor is not set to the minimum).
Related
information
• The operation state (ON/OFF) of the travel speed shifting solenoid can be checked with the monitoring
function. (Code: 023, Left of lower line)
• Since the controller detects disconnection while the solenoid output is turned ON, be sure to turn the
solenoid output ON when checking for reproduction of the failure after repair. (For the method of turn-
ing the solenoid output ON and OFF, see troubleshooting for error code [206].)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective travel speed
shifting solenoid (Internal
disconnection)
a
Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
V04 (male) Resistance
Between (1) and (2) 20 – 60
z
2
Disconnection in wiring
harness (Disconnection in
wiring harness or defective
contact in connector)
a
Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between C03 (female) (27) and
V04 (female) (1)
Resistance
Max. 1
z
Wiring harness between C03 (female) (3), (13),
(23) and V04 (female) (2)
Resistance Max. 1
z
3
Short circuit with power
source in wiring harness
(Contact with 24-V circuit)
a
Prepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between C03 (female) (27) – V04 (female) (1)
wiring harness and chassis ground
Voltage Max. 1 V
4
Defective governor and
pump controller
a
Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
C03 (female) Resistance
Between (27) and (3), (13), (23) 20 – 60
z
[216]
(1)