Failure Code [Daf8Kb] Short Circuit In Camera Power Supply - Komatsu Galeo PC138US-8 Shop Manual

SEN02465-01

Failure code [DAF8KB] Short circuit in camera power supply

User code Failure code
— DAF8KB
Contents of • Output power supply voltage (Rating: 8 V) from machine monitor to camera is below 6.0 V or above
trouble 10 V.
Action of • Turns output power supply voltage (Rating: 8 V) to camera OFF.
machine monitor • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Camera image is not displayed on monitor screen.
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
Defective camera (Internal
1
short circuit)
Ground fault in wiring har-
2 ness (Contact with GND cir-
Possible causes
cuit)
and standard
value in normal
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective machine monitor
6
Short circuit in camera power supply
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a Disconnect camera with starting switch OFF, then turn starting
Disconnect camera and perform failure reproduction operation. If
failure code disappears at this time, camera is defective.
a Disconnect camera with starting switch OFF, then turn starting
Between CM05 (female) (1) – CAMERA
(female) (F) wiring harness and ground
a Disconnect camera with starting switch OFF, then turn starting
Between CM05 (female) (1) – CAMERA
(female) (F) wiring harness and ground
If causes 1 – 3 are not detected, machine monitor may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
switch ON and carry out troubleshooting.
switch ON and carry out troubleshooting.
(Disconnect camera and check that it is not defective in
advance.)
switch ON and carry out troubleshooting.
(Disconnect camera and check that it is not defective in
advance.)
40 Troubleshooting
1
Voltage Min. 6 V
Voltage Max. 10 V
PC138US, USLC-8