Monitoring Function Fails To Display "Swing" Normally - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02632-02
E-24 Monitoring function fails to display "swing" normally
Trouble • Swing is not displayed normally by machine monitoring function (Special function).
Related infor-
• Monitoring code: 01900 (Output Switch 1)
mation
Defective swing left PPC oil
1 pressure switch (Internal dis-
connection or short circuit)
Defective swing right PPC oil
2 pressure switch (Internal dis-
connection or short circuit)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
Possible causes
defective contact in connec-
and standard
tor)
value in normal
state
Ground fault in wiring har-
ness
4
(Short circuit with GND cir-
cuit)
Hot short (Short circuit with
5
24V circuit) in wiring harness
6 Defective pump controller
50
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (1) – (2)
a
Between (1) – (2)
a
Wiring harnesses between CP01 (female)
(16) – P03 (male) (2), – P07 (female) (2)
Wiring harness between P03 (female) (1) –
chassis ground
Wiring harness between P07 (female) (1) –
chassis ground
a
Wiring harnesses between CP01 (female)
(16) – P03 (female) (2), – P07 (female) (2)
and chassis ground
a
Wiring harnesses between CP01 (female)
(16) – P03 (female) (2), – P07 (female) (2)
and chassis ground
a
Between (16) –
chassis ground
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
P07 (male) Swing lever
Neutral
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
P03 (male) Swing lever
Neutral
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.
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CP01 Bucket lever
Neutral
Left or Right
40 Troubleshooting
Resistance
Min. 1 Mz
Max. 1 z
Left
Resistance
Min. 1 Mz
Max. 1 z
Right
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
Voltage
20 – 30 V
Max. 1 V
PC300, 350-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Max. 1 V