Failure Code [D110Kb] Battery Relay Drive Short - Komatsu PC130-8 Shop Manual

SEN04120-03

Failure code [D110KB] Battery relay drive short

User code Failure code
— D110KB
Contents of
• Abnormal current flowed at output to battery relay drive circuit.
trouble
Action of • Turns output to battery relay drive circuit OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Engine does not stop.
machine
Related
information
Defective battery relay
1
(Internal defect)
Possible causes
and standard
Ground fault in wiring har-
value in normal
ness
2
state
(Short circuit with GND cir-
cuit)
3 Defective pump controller
34
Battery relay drive short
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Between BR (terminal BR) –
Between BR (terminal BR) –
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP02 (female)
(108) – D01 – J01 – R02 (terminal BR) and
chassis ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CP02 (female)
Between (108) –
chassis ground
Battery relay
RE (terminal E)
chassis ground
Turn starting switch
OFF.
ON o OFF
40 Troubleshooting
1
Resistance
There is continuity
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Voltage
20 – 30 V
(4 – 7 sec.)
PC130-8