Monitoring Function Does Not Display "Swing" Normally - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
E-29 Monitoring function does not display "Swing" normally
• Monitoring function does not display
Trouble
"Swing" normally.
Related
• 6-bit position of swing oil pressure switch (Code: 0201, Right of upper line)
information
Defective swing LEFT oil
pressure switch
1
(Internal disconnection or
short circuit)
Defective swing RIGHT oil
pressure switch
2
(Internal disconnection or
short circuit)
Disconnection in wiring
harness
3 Disconnection in wiring
Possible causes
harness or defective
and standard
contact in connector)
value in normal
state
Short circuit with chassis
ground in wiring harness
4
(Contact with ground
ircuit)
Short circuit with power
5 source in wiring harness
(Contact with 24-V circuit)
Defective governor and
6
pump controller
20-456
(1)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
S03 (male)
Between (1) and (2)
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
S07 (male)
Between (1) and (2)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between C03 (female) (29) and
S03 (female) (1) or S07 (female) (1)
Wiring harness between S03 (female) (2) and
chassis ground (A16)
Wiring harness between S07 (female) (2) and
chassis ground (A16)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C03 (female) (29) – S03 (female) (1)
or S07 (female) (1) wiring harness and chassis
ground
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between C03 (female) (29) – S03 (female) (1)
or S07 (female) (1) wiring harness and chassis
ground
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
Between (29) and
chassis ground
The monitoring function (special function) of the monitor
panel does not display "Swing" normally.
Left work equipment
control lever
Neutral position
Swing LEFT position
Left work equipment
control lever
Neutral position
Swing RIGHT position
Left work equipment
C03
control lever
Neutral position
Swing LEFT or RIGHT
position
E-29
Resistance
Min. 1 Mz
Max. 1 z
Resistance
Min. 1 Mz
Max. 1 z
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Min. 1 Mz
Resistance
Voltage Max. 1 V
Voltage
20 – 30 V
Max. 1 V
PC130-7