Case CX130 - Page 118

4 - 30
DIAGNOSTIC - SELECTION
CASE TRAINING CENTER
AUGUST 2000
Overheating (continued)
Troubleshooting Cause Action
2. The hydraulic temperature bar-graph displays 8 bars.
Starter key switch ON
The temperature
sender temperature (oil)
is abnormal compared
to maintenance
assistance CHK1
(comparison between
the real temperature
and that indicated).
See coolant
temperature in CHK1
OT. Measure the real
temperature
YES
See problem code
M0020 for the oil
temperature sender
using maintenance
diagnostic (DIAG 4)
YES
Disconnect the
temperature sender
connector (oil) to
measure the resistance.
(Refer to the table
below for the
resistances).
NO
Temperatur
e sender
(oil)
defective
Change the
oil
temperature
sender
YES
Disconnect connector
CN24 to measure the
resistance between the
male terminals OL and
BO. (Refer to the table
below for the
resistances).
NO
Bad
connection
on the
thermal
detector (oil)
connector
Clean the
detector
connecting
terminal
YES
Disconnect connector
CN1 to measure the
resistance between the
female terminals OL
and BO. (Refer to the
table below for the
resistances).
NO
Bad
connections
on CN24
Clean the
connecting
terminal on
CN24
YES
Electronic
control box
defective or
bad
connection
on CN1
Change the
electronic
control box
or clean the
connecting
terminals on
CN1
Note: In the event of a short-circuit, the bar-graph disappears completely.