54 PC800, 850-8
SEN00791-02 40 Troubleshooting
Failure code [D163KB] Flash Light Relay S/C
Action code Failure code
Trouble
Flash Light Relay S/C
(Pump controller system)
— D163KB
Contents of
trouble
• Abnormal current flowed in the flash light relay circuit (the primary circuit of the relay), when power is
supplied to the circuit.
Action of
controller
• The controller turns OFF the output to the coil circuit of the flash light relay.
• Even after the failure cause disappears of itself, the machine operation does not return to normalcy,
unless the engine starting switch is once turned OFF.
Problem that
appears on
machine
• The flash light does not flash.
Related
information
• Operation of the flash light relay circuit (the primary side of the relay) (ON or OFF) can be checked in
the monitoring function. (Code No. 03701: Controller output 2)
• This error code detects abnormality on the primary (coil) side of the flash light relay and cannot detect
abnormality on the secondary (contact) side.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Flash light relay defective
(Internal short-circuiting)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
R10 (male) Resistance
Between (1) – (2) 250 – 350 z
2
Grounding fault of wiring
harness
(Contact with grounding cir-
cuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness between CP03
(female) (18) and R10 (female) (1) and ground-
ing
Resis-
tance
Min. 1 Mz
3
Pump controller
defective
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
CP03 Horn switch Voltage
Between (18) –
chassis ground
ON
20–30V Max. 1V
(at constant cycle,
5 seconds)
OFF Max. 1 V
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