Fuel Level Monitor Was Lighted In Red While Engine Running - Komatsu ecot3 PC300LC-8 Shop Manual

40 Troubleshooting
E-10 Fuel level monitor was lighted in red while engine running
Trouble • Fuel level monitor was lighted in red while the engine running.
• If fuel level gauge on the machine monitor indicates red range, fuel level monitor turns red.
Related infor-
• Input signal (voltage) from the fuel level sensor can be checked with monitoring function.
mation
(Code 04200: Fuel level sensor voltage)
Low fuel level
1
(When system is normal)
Defective fuel level sensor
2
(Internal disconnection)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness
state
3 (Disconnection in wiring or
defective contact in connec-
tor)
4 Defective machine monitor
Circuit diagram related to fuel level sensor
PC300, 350-8
Cause Standard value in normal state/Remarks on troubleshooting
a
a
Between (1) and
chassis ground
a
Wiring harness between CM01 (female) (9) –
P21 (female) (1)
a
CM01 (female)
Between (9) and
chassis ground
Add fuel
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P21 (male) Fuel level
FULL (Upper limit)
EMPTY (Lower limit)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Fuel level
FULL (Upper limit)
EMPTY (Lower limit)
SEN02632-02
1
Resistance
Approx. 12 z
85 – 110 z
Resis-
Max. 1 z
tance
Resistance
Approx. 12 z
85 – 110 z
23