TROUBLESHOOTING
M-23
M-23 Defective coolant level sensor system
Note 1: Variations in coolant level
The coolant level may change according to the angle of the machine, or the swaying of the machine, so if
there is any display, check the coolant level again with the machine at a horizontal place.
* Remove the coolant level sensor when carrying out troubleshooting.
YE
1
When float is moved
up and down, is
Et
resistance between
connector (1) and (2)
as shown in Table l?
P
Note 2:
Note 3:
Note 4:
r
1
Is any dirt stuck to
moving part of
float?
I
,piijiGJ
NO
I
II
NO
Table 1
I
Float UP
Max. 1 Q
I
Float DOWN
Min.1 MD
ri==l
Float
-I
I
I
,
Cause
Iefective movement of float
due to dirt
Resonance of mount (Note 2
Defective contact of
connector (Note 2)
Disconnection in wiring
harness (Note 3) (defective
clamp) (external force
applied)
Defective sensor
F20205056
Iean
Clean connector
or replace
Replace sensor
If the problem occurs again, the connector (female) at the chassis end is probably defective, so check the
connector and wiring harness at the chassis end.
Check for vibration at the connector mount.
If there is excessive vibration, take the appropriate action.
Defective installation is a possible cause, so be careful when installing. If the problem occurs again, check
for any vibration of the mount, and if there is excessive vibration, take the appropriate action.
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