Checking The Coolant Thermistor Operation - APRILIA SL Mille Workshop Manual

SL mille
ELECTRIC SYSTEM
6.4.8 CHECKING THE COOLANT THERMISTOR
OPERATION
NOTE
The value of the temperature measured by the
front cylinder thermistor (right-hand side) is sent up on
the right-hand display; that measured by the rear cylinder
thermistor (left-hand side) is sent to the electronic unit.
+
Remove the thermistor (1), see 5.5 (REMOVING THE
COOLANT THERMAL SWITCH).
+
Connect a tester (2) (set as an ohmmeter) to the ther-
mistor (1), as illustrated in the figure.
+
Immerse the thermistor (1) in a container (3) holding
coolant.
+
Immerse a thermometer (4) with a 0 to 150°C (32 to
.302 OF) range in the same container.
+
Place the container on a burner (5) and slowly warm up
the liquid.
+
Check the temperature indicated on the thermometer
(4) and the thermistor (1) value indicated by the tester.
Make sure that the value varies according to the temper-
ature, as indicated.
400 - 700
200 - 400
120 - 250
800 - 1200
1960 - 2940 68
104
212
140
176 .
40
60
20
80
100
If values do not vary, or if they depart excessively
from those indicated in the table, change the thermis-
tor (1).
+
Repeat the procedure for the other thermistor.
Release 00/2001-05 - - - - - - - - - -
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