Error Code [315] (Short Circuit In Battery Relay Output Line) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [315] (Short circuit in battery relay output line)

User code Error code
– 315
Contents of
• When the signal is output to the battery relay drive circuit, an abnormal current flows.
trouble
• Turns off the output to the battery relay drive circuit OFF.
Action of
• Even if the cause of the failure disappears, the system does not reset itself until the starting switch is
controller
turned OFF.
Problem that
appears on • The engine does not stop (The controller power supply cannot be maintained until the engine stops).
machine
Related • The operation state (ON/OFF) of the battery relay can be checked with the monitoring function.
information (Code: 037, Right of upper line)
Defective battery relay
1
(Internal short circuit)
Possible causes
Short circuit with chassis
and standard
ground in wiring harness
value in normal
2
(Contact with ground cir-
state
cuit)
Defective governor and
3
pump controller
20-358
(1)
Abnormality in battery relay output
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between A21 (BR) and A20 (E)
Between A21 (BR) and
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C03 (female) (4) – D01 – J01 – A21
(BR) wiring harness and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between (4) and
chassis ground
Battery relay (unit)
chassis ground
C03 Starting switch
ON o OFF
[315]
Resistance
Approx. 100 z
Min. 1 Mz
z
Resistance Min. 1 M
Voltage
20 – 30 V
(For 4 – 7sec)
PC130-7