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

SEN02632-02
E-18 Monitoring function fails to display "boom raise" normally
Trouble • Boom RAISE operation is not displayed normally by machine monitoring function (Special functions).
Related infor-
• Monitoring code: 01900 (Pressure Switch 1)
mation
Defective boom RAISE PPC
oil pressure switch (Internal
1
disconnection or short cir-
cuit)
Disconnection in wiring har-
ness
2 (Disconnection in wiring or
defective contact in connec-
tor)
Possible causes
and standard
Ground fault in wiring har-
value in normal
ness
state
3
(Short circuit with GND cir-
cuit)
Hot short (Short circuit with
4
24V circuit) in wiring harness
5 Defective pump controller
38
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (1) – (2)
a
Wiring harness between CP01 (female) (53)
– P06 (female) (2)
Wiring harness between P06 (female) (1) –
chassis ground
a
Wiring harness between CP01 (female) (53)
– P06 (female) (2) and chassis ground
a
Wiring harness between CP01 (female) (53)
– P06 (female) (2) and chassis ground
a
Between (53) –
chassis ground
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
P06 (male) Boom lever
Neutral
Boom RAISE
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 Boom lever
Neutral
Boom RAISE
40 Troubleshooting
1
Resistance
Min. 1 Mz
Max. 1 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
Voltage
20 – 30 V
Max. 1 V
PC300, 350-8