Case CX130 - Page 117

DIAGNOSTIC - SELECTION
4 - 29
CASE TRAINING CENTER
AUGUST 2000
Troubleshooting Cause Action
1. The 8 bars on the coolant temperature bar-graph are displayed.
Starter key switch ON
The temperature of the
temperature sender
(coolant) is abnormal
compared to
maintenance
assistance CHK1
(comparison between
the real temperature
and the indicated
temperature).
See coolant
temperature on CHK1
WT. Measure the real
temperature
YES
Check problem code
E0015 for the coolant
temperature sender
with the maintenance
diagnostic (DIAG 1)
YES
Disconnect the coolant
temperature sender
connector to measure
the resistance
NO
Coolant
temperature
sender
defective
Change the
temperature
sender
YES
Disconnect connectors
CN24 and CNAO to
measure the resistance
between the female
terminals PL and BP.
(Refer to the table
below for the
resistances).
NO
Bad
connection
on the
temperature
sender
connector
(coolant)
Clean the
temperature
sender
connecting
terminal
YES
Disconnect connectors
CN7 and CNAO to
measure the resistance
between the female
terminals PL and BP.
(Refer to the table
below for the
resistances).
NO
Bad
connections
on CN24
Clean
connections
CN24
YES
Main
electronic
control box
defective or
bad CN7
and CNAO
connections
Change
main
electronic
control box
or clean the
connecting
terminals on
CN7 and
CNAO
Note: In the event of a short-circuit, the bar-graph disappears completely.