Fuel Level Gauge Is Abnormal - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
E-17 Fuel level gauge is abnormal
(1) While fuel level is high, gauge does not rise from red range (E).
Trouble
(2) While fuel level is low, gauge does not lower from green range (F).
Related • The input state (ON/OFF) from the fuel level sensor can be checked with the monitoring function.
information (Code: 042, by 10 mV)
Defective fuel level sensor
1 (Internal disconnection or
short circuit)
Disconnection in wiring
harness
2 (Disconnection in wiring
harness or defective
contact in connector)
Possible causes
and standard Short circuit with chassis
value in normal ground in wiring harness
3
state (Contact with ground
circuit)
Short circuit with power
4 source in wiring harness
(Contact with 24-V circuit)
6 Defective monitor panel
Circuit diagram related to fuel level sensor
PC130-7
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
A60 (male)
Between (1) and
chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between P02 (female) (2) and
A60 (female) (1)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between P02 (female) (2) – A60 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between P02 (female) (2) – A60 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (2) and
chassis ground
Fuel level
FULL (Upper limit)
EMPTY (Lower limit)
P02 Fuel level
FULL (Upper limit)
EMPTY (Lower limit)
E-17
Resistance
Approx. 12 z
85 – 120 z
Max. 1 z
Resistance
Min. 1 Mz
Resistance
Voltage Max. 1 V
Resistance
Approx. 12 z
85 – 120 z
20-431
(1)