Fuel Level Gauge Does Not Indicate Normally; Circuit Diagram Related To Fuel Level Sensor - Komatsu PC210-8 Shop Manual

40 Troubleshooting
E-11 Fuel level gauge does not indicate normally
(1) While fuel is added, fuel level gauge does not rise from red range (E).
Trouble
(2) While fuel level is low, fuel level gauge does not lower from green range top (F)
Related infor-
• Signal voltage of fuel level sensor can be checked with monitoring function.
mation
(Code: 04200 Fuel level sensor voltage)
Defective fuel level sensor
1 (Internal disconnection or
short circuit)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
and standard
Ground fault in wiring har-
value in normal
3 ness (Short circuit with GND
state
circuit)
Hot short (Short circuit with
4
24V circuit) in wiring harness
5 Defective machine monitor

Circuit diagram related to fuel level sensor

PC210, 230, 240-8
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between CM01 (female) (9) –
P21 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between CM01 (female) (9) –
P21 (female) (1)
a Prepare with starting switch OFF, then turn starting switch ON
Wiring harness between CM01 (female) (9) –
P21 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
CM01 (female)
chassis ground
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
P21 (male)
Between (1) –
without turning starting switch ON.
without turning starting switch ON.
and carry out troubleshooting.
without turning starting switch ON.
Between (9) –
UEN00244-02
Fuel level Resistance
7 – 11 z
FULL
85 – 95 z
EMPTY
Resist-
ance
Resist-
ance
Voltage
Fuel level Resistance
7 – 11 z
FULL
85 – 95 z
EMPTY
1
Max. 1 z
Min. 1 Mz
Max. 1 V
31